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S-CB PX120 Installation, Operating and Maintenance Manual

1. RI RC Reason Temperature difference T2 T1 has exceeded the blocking value and the period as set in the parameters P2CQ P2CV Pispleymessage tei e his mig ES ES ERES SIRE Reason Temperature difference T2 T1 has exceeded the blocking value as set in the parame ters P2CQ P2CV more than three times message 944441 pee eere eet ttt ERR Bee pote Reason Gas supply pressure is too low Display message Display message 68 Ulls2a C ESTER RT RET ERES 0 8 Reason Water pressure is too low or too high Ul illc DD L 11 1 1 lele 9 s Reason Outdoor temperature has exceeded the blocking temperature which is set in the pa rameters amem p B EE Pete n ER ERES Reason Temperature difference between flow and return exceeds the blocking value but not the lock out value 4 e e P DERE CHEESE ERE Reason One of the cascaded boilers causes an error because of a lock out es ER ES ELEC UICE Reason Activation of the air pressure switch IN R V ofr tfau SESS 8 t
2. ness 27 8 5 2 ifei i a iz 27 8 6 C63 re i auis 28 8 7 FLUE GAS OUTLET amp COMBUSTION AIR INLET CALCULATION EXAMPLES eee 28 8 7 1 Maximum straight lengths five typical 29 8 7 2 Specific resistance calculation example of configuration B with given lengths 29 TABLE OF CONTENTS 8 7 3 Open version B23 B23P B33 ii e t etd vt di ig 30 9 ELECTRICAL enne bx Ia epu ehe 31 9 1 GENERAL exe ente a hte 31 9 2 ELECTRICAL CONNECTIONS nie 31 9 3 FUNCTIONS OF THE CONNECTIONS nnne 31 9 4 ELECTRICAL SCHEMATICS Ere bu 33 9 5 SENSOR VALUES AND CONVERSION TABLES 44 4244044 4 rnit nennen nnns 35 10 EE 36 10 1 CONTROL PANEL DISPLAY 0 36 10 2 CONTROL PANEL MENU STRUCTURE 4 1 1 20 E T 37 10 3 DISPLAY DURING OPERATION 1 4 4 46 E E 39 MONITOR SCREENS be Actes ree ee ee dul see rib eer ne cou 40 10 5 SERVICE FUNCTION
3. Set Ae 42 10 6 SCHORNSTEINFEGER FUNCTION ara aa 43 10 7 PROGRAMMING IN STANDBY 44 10 8 SETTING THE TINE amp DATE oe te Ae dde kb ve rre uot ve ogg ee 44 10 9 OSETROINTS Ree e NAR AU dui ane epe 45 10 10 SETTING THE TIMER PROGRAMS E AE 46 10 11 SETTING THE OUTDOOR SPECIFICATIONS 49 10 12 CHECKING THE OPERATING HISTORY 53 10 13 CHECKING THE FAULT HISTORY 54 10 14 SETTING THE MAINTENANCE SPECIFICATIONS cessere nemen nennen nennen enn 55 10 15 SETTING THE USER LOCK visit ncn e ad hi EO aee e Rein ieee 58 10 16 SETTING THE PARAMETERS WITH THE DISPLAY 22 enne 59 10 17 FAUET CODES DISPLAY iint eerie np Tr E te EO RR tinea neh iene 66 10 17 1 EOCK OUt COE Sietle t eR TO Reb fed 66 10 17722 Blocking LOGOS pd one ehm itur 68 10 7 7 3 M SSAaQg6S i ete veio LEER cada EE 69 11 CONTROLLING OPTIONS AND 70 11 17 ihe CREE tace pp 70 111 1 Extra boiler C
4. For extensive explanation see Ch 11 Controlling options and settings page 70 ff IMPORTANT Do not change the parameters P2LC P2LD P2ML P2MM and 5 they are present in the con troller for different purposes than CH control Changing these parameters may affect boiler operation negatively Parameter screens concise explanation see next pages gt 59 60 Operating screen I le r offf gt 12121 1112131 41 1 111213 4 1 Press MENU Select Parameter using 4 amp gt and press ENTER tja Jcloldje k LI Enter the 4 digit code with the 4 amp gt and the A amp V buttons and select ENTER The code will blink a few seconds and when entered correct ly the following parameters will be displayed NOTICE These codes are user based and give access to a selected amount of parameters which can be changed In staller level 1 2 1 S itie p FERE FEST RES ER ES ERR E EHE RE Pd D Function to activate the step modulation 0 Off 1 21 HIE s 1 3 BESSEREN E CH supply temperature setting This parameter is the offset of the programmed CH temperature A 3 s P r b 1 3 e se Ben ena Select the CH supply temperature control T
5. status of the pump during fault jojn 9 9 9 5 nirjs Reason Flow sensor not detected by the boiler caused by faulty connection sensor pr ey message P ris FI oln 9 9 9 5 nirjs Reason Flow temperature exceeds the limit which has been set in the parameters pere message oes P Join 9 9 9 5 Reason The maximum return temperature as set in the parameters is exceeded meee E Jojn oj9 9j s nirjs Reason The general required gradient water lack has failed Ruta perse ene da oln oj9 9j s nirjs Reason Return sensor not detected by the boiler caused by faulty connection sensor s 9 9 9 5 nirjs Reason Flue gas sensor not detected by the boiler caused by faulty connection sensor ponme Ee em e E 9 9 9 5 nirjs Reason Flue gas temperature exceeds the limit which has been set in the parameters Ee SEE EE 9 9 9 5 Reason Boiler is not starting after the programmed starting attempts 66 papey message is Jojn 9 9 9 5 nirjs Rea
6. des 21 6 16 UNDERFLOOR HEATING 21 6 17 FLUSH THE SYSTEM WITH FRESHWATER 55 21 6 18 INSTALLATION EXAMPLES bornai 22 6 18 1 Example of a low resistance heating 2 2 2 00600000000000000000000 0 22 6 18 2 Example of a normal single boiler heating circuit 22 6 18 3 Example of a multiple boiler heating 2 23 7 HYDRAULIC GRAPH BOILER RESISTANCE mW GC eese nnne nennen nnn nennen nnn nennen 24 7 1 piv etka 24 7 2 25 8 FLUE GAS DISCHARGE AND AIR SUPPLY SYSTEM 1 1 n nennen nennen nnn 26 8 1 E Inr EE 26 8 2 AIR SUPPLY MC 26 8 2 1 Combustion air quality oe od ae Eee eene eren Rate e aane d cesta du apre 26 8 2 2 Air supply through humid 2 2 nennen nnn 26 8 3 FLUE TERMINAL ca desc coe 26 8 4 PIPE HEIGHTS ON A FLAT sedan tenes
7. 56 From previous page Screen Message after total amount of burning hours IMajiintje n BBjujr inji nig Press gt to set The total amount of burning hours for the Maintenance message Press 4 to Return to maintenance mode selection gt Confirmation screen lt Clajnicje j gt jClojnifji r m Press 4 to cancel the changes or gt to confirm the changes Hereafter the boiler returns to the operating screen Screen No maintenance message will be displayed IMajiintje n Miode Mjaji nitejin Jojfjf Press ENTER to confirm the changes Confirmation screen yjoju siure lt 1 gt Cjo nifji jr m Press 4 to cancel the changes or gt to confirm the changes Hereafter the boiler returns to the operating screen Note The MENU button will return the display to the operating screen BE AWARE This function is standard turned off We offer this programmable function so the installer can use it as a reminder Because it concerns a free programmable function the use of it cannot be used as an argument in warranty cases Our units must be maintained every twelve months whatever the settings working of this function It is and remains the respo
8. Reason Non return valve contact signal activated gt 15 seconds will cause a lock out i ESSERE ST E E RO RR EGRE FERIIS EI Reason Wrong electrical power supply is connected not 50 or 60Hz 220 240 Volt Reason The general blocking circuit is activated during operation contact 7 8 Display message Display message Display message Display message Display message 10 17 3 MESSAGES The following graphs describe the messages at the boiler display Depending on the selected and activated op tions for the boiler it is possible that some messages will show up at the display of the boiler For example a maintenance message after a certain programmed date has been reached The boiler will operate independently of these messages MAINTENANCE ATTENTION FUNCTION The display shows alternating the base screen and this message while the backlight is blinking The boiler is operating but will count the exceeding hours A parameter must be changed after service to remove this message Disnlaymessage etd sma iin tein a nj 1 Reason Maintenance option of total amount of ignition cycles has been reached Display message INjeJe d s Mja iin t e n a n Dra SEE e ER ER EIE EET Reason Maintenance option of the date has been
9. Ll Jy Lo rire pes cse ee enm ence ses re Press 4 amp gt to browse through the 5 screens Press MENU or ENTER to exit The unit will return to the operating screen lop e rja t i n g jh r s j 1 3 1 4 0 0 Top line Shows the operating history menu is activated Bottom line Total hours the boiler is connected to power supply and switched on Ihir s C h j T ojt 110 0 0 0 0 0 Injr s D h w 1 0 0 0 0 0 0 lt 5 0 110010101010 51 12115019 1 0 Top line Burning hours for heating while the burner was firing less than 5096 Bottom line Burning hours for heating while the burner was firing equal or higher than 50 Ihir s D h w lt 5 0 1 0 0 0 0 0 0 gt 15 01 1 0 0 0 0 0 0 Top line Burning hours for hot water while the burner was firing less than 5096 Bottom line Burning hours for hot water while the burner was firing equal or higher than 50 1 5 1 1 5 1 1 0 0 0 0 6 Top line Shows Total Ignition Attempts Tia amp Failed Ignition Attempts Fia Bottom line Shows Soft Starts last Ssl amp Soft Starts Total Sst 10 13 Checking the fault history The following graphs describe how to check the fault history of the boiler 54 Operatin
10. cascade temp set point communi measured temp control sens Thermostat gt coil flow ca temi showing the measured temp tion indica Can be turned off by P5 BJ tor Sensor water temp Explanation Actual status screen Actual status When boiler is switched off only text in the display during this status No heat demand signal coming from the room thermostat and calorifier sensor open IS t a nid b y Room thermostat amp calorifier sensor thermostat detect heat demand but set point is reached The fan is purging before a burner start attempt Ignition starts before opening of the gas valve The igniter is igniting The fan is purging after burner is switched off iBju rinjijnjg 1 0 0 When the burner is firing also the actual rom is shown Explanation Cascade communication indicator NO CASCADE COMMUNICATION no 1 Always showing the fixed gt gt gt CORRECT CASCADE COMMUNICATION gt no 1 gt no2 Showing alternating 1 amp no 2 with 1 second interval 39 10 4 Monitor screens During normal operation and stand by the lt and buttons can be used to show some boiler information including measured temperatures settings and data In the following graphs is explained which values can be shown in the display When no button is activated for 2 minutes the display will return to its status display
11. Ma utis maie Reason One of all selected maintenance options has been reached This message function is standard not activated but can be acti vated set by a trained engineer This function does not overrule N the need for annual maintenance The end user is always respon sible for arranging annual maintenance 99 17 MAINTENANCE 17 1 General For a good safe and long time operation of the boiler it is advised to carry out maintenance and service on the boiler Maintenance and inspection of the boiler should be carried out at the following occasions When a number of similar error codes and or lock outs occur Atleast every twelve months maintenance must be done to ensure safe and efficient operation Damage caused by lack of maintenance will not be covered under warranty MAINTENANCE REMINDER FUNCTION lt See previous page BE AWARE This function is standard turned off We offer this programmable function to the installer to use as a reminder Because it concerns a free programmable function the use of it cannot be used as an argument in war ranty cases Our units must be maintained every twelve months whatever the settings working of this function It is and remains the responsibly of the end user to have the unit maintained every twelve months For more information about this maintenance mode see 10 14 Setting the maintenan
12. Pressing 4 or gt while being at the operating screen toggles through the screens below When pressing ON OFF RESET ENTER or MENU at any time the display returns to the base menu SCREEN 1 Temperature difference between flue gas amp internal return return AT LLH Temperature difference between external amp internal ISle tiplo i Power power input control or Setpoi set point control Dial y hh hour mm minutes DD day MM month YYYY yr day of the week 40 Dje js i g n o master 1 11 staves 1 2 4 5 8 8 A 8 peus number ara sat of cascade sores DESCRIPTION CASCINFO Screen 11 Shows the number of boilers connected with the Cascade The Master Lead boiler is designated as 0 Slave Lag boilers will be designated 1 2 3 4 5 6 7 8 9 A B When a is used instead of a number then that boiler is either not connected or in a lockout mode and not available for the Cascade When an is used instead of a number then that boiler is connected but in lockout mode When a d is used instead of a number then that boiler is handling a DHW demand When the number is flashing then that boiler is providing heat to the cascade When the leading boiler is changed according to the set priority change time then that boil
13. The boiler must be positioned and installed by a skilled installer in accordance with all applicable standards and regulations Commissioning the boiler must be done by a skilled service commissioning engineer who is trained for this type of boiler 14 5 2 Mounting the boiler Before mounting and installing the boiler the following connections should be considered e Flue gas system and the flue gas pipe connections e Air supply system and connections e Flow and return pipe connection and pump position e Condensate and pressure relief valve drainage e Power supply preferably the power connection positioned above the boiler All lines piping must be mounted free of tension The weight of all the installation components should be supported separately from the boiler so there will be no standing force on the connec N tions Pay attention to this while choosing the mounting position of the boiler Determine the position of the flow and return pipes by using the included suspension bracket or a suspension frame when supplied While marking the holes ensure that the suspension bracket or frame is perpendicular and the boiler does not lean forward If necessary adjust the position with the adjusting bolts at the lower rear side of the back panel see drawing When the adjusting bolts aren t sufficient fill the gap behind the bolts to get the boiler in position The exact boiler position lies between the boiler han
14. Corrective action Check if there were extreme weather wind conditions when the fault occurred Check if the boiler room pressure is equal to the pressure at the position of the flue gas outlet When combustion air is drawn from the boiler room F10 oln jojojo 5 Reason Flame signal detected while boiler should not fire for operation The flame detection circuit detects a flame which is not supposed to be present Check the ignition ionisation electrode and make sure it is clean or replace it Check the power supply voltage for a correct polarity Check the power supply for bad frequency or voltage peaks Check external wiring for voltage feedback Check the internal wiring for bad connections Check if the gas valve is closing correctly Replace the burner control speed eee F11 oln 9 9 9 5 n r s An incorrect fan speed is detected Check the 4 wired wiring and connections at the fan and at the main control board Check the 3 wired power supply wiring and connections at both ends Replace the fan Replace the main control board pvm 119441 mmi in F12 oln 919 91 s n r s Programming of the parameters completed successfully This message occurs to confirm the end of programming Pressing RESET will return the unit in normal operating statu
15. Ground wire 35 Neutral wire 9 4 Electrical schematics internal connections ionisation andor ignition ST 16 K 5 21 clixonimaximum 56 57 Ki water thermostat 24ude F EA fiz 8 ES fan Hall ST 12 fan contra fan hal ran fan Puta 24Vd0 b PWM pump control 4 C a ST flow sensor 51 10K ji 3 ST 10 flue sensor ntc 55 10K ST 12 sensor 52 10K L water pressure sensor ST 19 water pressure switch will gt be mounted above 4 bar Gnd Rear wall thermal fuse EE Model 50 has no thermal fuse 5T22 Connection is bridged on the thermal fuse connector 5 gas valve K Bumer door thermal fuse RE 5ST 14 internal connections connection examples thermostat External safely device Extemal flow switch Smoke detection Gas detection Ventilation fan Flue gas fan End switch motor actuated flue gas valve Gas leakage tester Jh power stealing slave boiler only when unitis cascaded Remote temperature setpoint or bumer inpul signal form BMS water pressure switch gt 4 bar ate 33 CNS boiler casing ignition transformer incl ionisation input Q 4 G 0 2 c blue red black K6 K7 K8 K9 white y
16. Increase CO percentage co24 2 ut 2 left counter clock Now continue for the setting at minimum load The service operation of the boiler will be active for 40 minutes After this period the boiler will return to normal operation Gas type Nat Gas 620 Nat Gas 625 Prop G31 Buta B P G30 gt Cal Value Hi EN437 MJ m 34 02 29 25 88 00 116 092 CO max output 96 9 0 9 0 10 3 10 4 O max output 96 4 9 4 9 5 2 5 3 min output 8 5 8 5 9 6 9 6 min output 96 5 7 5 7 6 2 6 5 Measured without boiler door Butane propane or B P mixtures only with air restrictor and venturi directly mounted on the fan see also instruc tion for butane propane kit A butane propane B P kit is needed see accessories list page 13 If measured values match table values within 0 3 Os values within 0 5 no setting is needed In all cases where setting is needed set the gas valve until measured CO values match table values within 0 1 values within 0 2 85 S CB Px 120 14 2 Setting at the minimum load To start up the boiler in service mode press the SERVICE button for around 3 seconds After that the boiler will start up and when the service mode is activated the following screen will appear isplay message HELA 8 EIE 1 2 3 Reason Boiler is activated a
17. System type 11 System 11 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 RT Modulating room unit with timer 13 14 E04 016 355 SNV Non return valve low resistance type P2 DHW primary pump 29 30 31 Calorifier tank ST Calorifier thermostat or sensor 5 6 E04 016 303 OH Low loss header FS Flow temperature sensor 3 4 E04 016 304 OS Outside temperature sensor 1 2 E04 016 585 Parameter change required A B1 B2 B3 boiler master boiler slave1 boiler slave2 boiler slave3 e heating zone 109 20 S CB Px 120 SPARE PARTS 20 1 Spare parts exploded view Numbers in the drawing correspond to the parts list on page 112 110 111 20 2 Spare parts list with Strebel part numbers Pos nr PART N Description 1 501 000 393 Side panel left S CB 120 2 Frontpanel with insulation State type and serial nr 3 E04 016 583 Ignition cable 60 180 kW BIC 4 504 000 372 Electrode set 5 507 004 035 Gasket burner door heat exchanger 6 E07 010 093 Insulation burner door 7 504 000 395 Replacement kit burner door including thermostat of POS 9 8 E06 010 012 Nut with flange M6 9 High limit thermostat 260 C For replacement
18. a RS RR Rd Function to activate external time controller 0 Off 1 Connect to 13 14 Contact closed daytime setting Contact open night time setting Menu B Hot water 1 Lene e po espe es ess Hot water function of the boiler by 0 pump 1 3 way valve Menu B Hot water B 2 DH ijf E ESSEN ESTE RS ESL Hot water function of the boiler This parameter is the CH supply temperature LOW level with an indirect hot water de mand Menu B Hot water HER ERR DR M Sd DR Hot water function of the boiler This parameter is the CH supply temperature HIGH level with an indirect hot water de mand Menu B Hot water B 4 oai ES SIRE EIER a Hot water function of the boiler This parameter is the se lectable time period after which the boiler switches from LOW to HIGH set point with an indirect hot water demand 62 B 5 TEES ES ES ES E Rs E SET Pasteurisation function of the boiler This parameter is the selected hot water temperature during the pasteurisation function of the boiler tlelglifo h y s t ES E RR d Pasteurisation function of the boiler This parameter is the sele
19. IDj Hj d s c Di i f yes F 5 Hysteresis DHW tank temperature C DiH i js c D i f 4 yes G P2KH Gradient heat demand detect DHW tank temperature D H ijdjejtjg rjajd yes 1 P2MA Max number extra boilers 5 2 P5DA Bus address boiler Bluls 4 5 65 no 3 P5DC Dhw on entire cascade 0 only master 1 2 4 PSDE Extra Boiler output enable 1 4 5 P5DF Cascade detection 1 Leader Cla s S i Mj a no 6 P5BL Power off total cascade 1 Piwir O f f T o C a no 7 P5DB Number of boilers with common flue 0 1 1 P5BB Analogue input Config O off 1 temp 2 power 2 P5AI Minimum Temperature 0 10V input 01 1110 yes 3 P5BI Altitude in amounts of 100 ft 100ft JA I t 1 0 0 f t yes a 4 P2LK Max cooling time min 1 x D 5 P5BJ Temperature display 1 Z 6 P4AA DHW O off 1 Indirect 2 Direct D H W 1 1112 rb 7 P4AD pressure O off 1 sensor and 2 switch cjoin fjij g no 8 P4BD Gas type values 0 2 giais tiy ple no 9 P4BE Soft start type values 0 2 cjoinjfiij g no A P5BN Pump modes 0 3 cjo njfjij g no
20. PSAL CH Flow temperature control 5 1 3 yes p 5 P2IC Integration time temperature control S H E 5 1 1 1 3 no E 6 P2MI Blocking offset System CH temperature control cO f f 3 yes 7 P2MJ Proportional range System CH temperature control 3 no 8 2 Integration time CH temperature control S 1 n t 3 no 9 P5AB Timer Contact 1 T ijmejr Cj ojnjt yes 1 PAAB DHW Pump Config 0 Pump 1 TWV DHii pim pj tw v yes 2 P5CB Flow temperature DHW tank low IDJ Hji f llo w 3 P5CK Flow temperature DHW tank hi IDJ Hji f llow 1 4 P5CL Low Flow temperature time DHW min 5 P5CD Legionella temperature C Leig ijo te mip no 6 P5CI Legionella hyst DHW tank temperature C Leig ijo hiy s t no 7 P5CJ Legionella hold time 0 off min 1 8 P2KI CH interrupt by Legionella 0 1 Ljejg ijo 9 P2LC Regulation temperature offset DHWd IDj H d s c O f f 2 yes P2MN Proportional range DHWd modulation C D H d sic Pir b 2 3 no B P2LD Regulation temperature hysteresis DHWd D H d s c D i f 2 yes C P2MO integration time DHWd modulation S 1 2 3 D P2ML Sys temp blocking offset DHW tank IDj Hj d s c O f 3 yes E P2MM Sys temp blocking hysteresis DHW tank
21. V to change the value Use 4 amp gt to select another value Press ENTER for the confirmation screen after all changes are done Confirmation screen yjelu Es C a n e e 1 jCje njf ijr m Press 4 to cancel the changes made display goes back to operating screen Press confirm the changes made The time and day will start blinking for a few seconds After this the display returns to its operating screen 44 10 9 Set points The following graphs describe how to program the heating and hot water set points NOTICE The hot water set points are only displayed when the boiler is programmed as an indirect hot water boiler or direct hot water boiler See parameter P4 AA for the exact boiler configuration iH E A T N G b o i t e r gt gt 1 2 3 41 1 1 2 3 fal jeh Press MENU MJa i n Mje nu ttt ty Ssect Setpoms using 4 amp TPTandpress ENTER By pressing 4 amp gt the following screens can be selected By pressing A amp the blinking values in the selected screen can be changed Press MENU to exit The unit will reset and return to the operat ing screen Press ENTER for confirmation screen when all the changes are made A rje lt c ajnieje t gt Clo njfji r im Press 4 to ca
22. display unit 36 control panel menu structure 37 controlling behaviour settings 72 controlling options and settings 70 dimensions 12 dirt filter 22 ff dirt separator 22 ff display during operation 39 diverter valve 3 way valve 9 31 75 e bus interface 13 efficiency 9 electrical connections 31 electrical installation 30 electrical schematics 33 expansion vessel 18 extra boiler control 70 fan 14 42 70 88 100 fault checking 54 66 fault codes display 66 114 fault codes blocking codes 90 firing for the first time 84 flue gas and air supply examples 28 flue gas and air supply systems 26 flue gas duct 26 flushing with clean water 21 frame 15 frost protection 19 gas conversion 86 gas valve 13 85 ff 88 100 hanging level 15 heat exchanger 9 76 ff 100 heating 70 ff heating and hot water switching at sudden temperature drop 77 heating and hot water switching time 77 hydraulic graphs 24 hysteresis 72 ignition 100 indirect hot water calorifier 75 inspection amp maintenance 100 installation examples 22 104 ff installation of the QP 120 14 installing a strainer and or dirt separator 19 introduction 9 legionnaires disease 46 78 low loss header 18 22 82 low high flow temperature to tank coil 76 low water level protection 14 maintenance 100 master 9 49 max cooling time 70 modulation 13 104 ff monitor scr
23. in series with the room thermostat During and after the commissioning of the boiler the operation of the boiler pump must be checked before lea ving the installation room NOTICE Always check the running of the pump before firing the boiler 83 13 STARTING THE BOILER 13 1 General Check the minimum gas pressure available at the gas connection pipe of the boiler Use the pressure nipple 3 of the gas safety valve for this measurement The minimum gas pressure for the boiler to operate properly under the correct load must be more than 20 mbar The graph shows the position of the pressure nipple 3 for the boiler S CB Px 120 13 2 Firing for the first time After the commissioning of the boiler and the described previous actions the boiler display will show the following graph Display message PEJA THING diem ald 4 C Reason Boiler is active but there is no heat demand The display describes e actual operation for heating or hot water demand is activated temperature setting temperature measured When mounting the bottom part of the siphon before commissioning the boiler and or after maintenance the siphon must ALWAYS be completely filled with water This is a safety measure the water in the siphon keeps the flue gases from leaking into the plant room via the condensate drain 84 14 ADJUSTING A
24. 22 burner burning Start stop through relay 3 connectors 23 and 24 heat demand The boiler pump must be controlled by the S CB Px 120 boiler control If for any reason an external pump control is applied without written approval of Strebel Ltd the complete warranty on the S CB Px 120 boiler and all supplied parts will become invalid gt 71 11 2 Heating The following chapters describe the different functions of the boiler and their related controlling behaviour set tings as a central heating boiler 11 2 1 CONTROLLING BEHAVIOUR SETTINGS The factory settings for all heating applications are working fine and it is therefore advised not to change these settings If changes are needed always consult the manufacturer for advice 5 Blocking offset flow temperature control display A2 The amount of degrees the measured temperature exceeds the active flow temperature set point before the heat demand stops Only active when the unit is controlled by the internal flow sensor S1 and used for single unit control P5AL Hysteresis CH Flow temperature control display A4 The amount of degrees that the measured temperature must drop relative to the active flow temperature set point Offset Parameter P5 AO before the heat demand starts This function is active when the unit is controlled by the internal flow sensor S1 and used for single units When controlling cascaded units with an external system senso
25. CORRECT CASCADE COMMUNICATION gt gt gt no2 Showing alternating no 1 amp no 2 with 1 second interval 11 4 2 MONITOR SCREENS To obtain cascade information see 10 4 on page 40 11 4 3 OUTPUT CONTROL AND BOILER SEQUENCE The total cascade set up will act as one single big boiler switching on and off boilers depending on the total load necessary to adjust and keep the flow temperature at the calculated value When the heat demand rises more boilers are switched on and when heat demand falls one or more boilers will be switched off The boiler that was switched on last will be switched off first see table below To distribute operating hours equally over all boilers the working sequence of the boilers will change every two hours Hour Switching ON sequence Switching OFF sequence X Master Slave 1 Slave 2 Slave 3 Slave 7 Slave 6 Slave 5 Slave 4 Slave 4 Slave 5 Slave 6 Slave 7 Slave 3 Slave 2 Slave 1 Master Slave 7 Master Slave 1 Slave 2 Slave 6 Slave 5 Slave 4 Slave 3 Slave Slave 4 Slave 5 Slave 6 Slave 2 Slave 1 Master Slave 7 X44 Slave 6 Slave 7 Master Slave 1 Slave 5 Slave 4 Slave 3 Slave 2 Slave 2 Slave 3 Slave 4 Slave 5 Slave 1 Master Slave 7 Slave 6 X46 Slave 5 Slave 6 Slave 7 Master Slave 4 Slave 3 Slave 2 Slave
26. Calorifier thermostat 5 6 E04 016 303 or tank sensor P2 DHW primary pump 29 30 31 OS Outside temperature 4 2 E04 016 585 sensor SNV Non return valve Parameter change required A boiler e heating zone System 6 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 RT Modulating room unit with 13 14 E04 016 355 timer FS Flow temperature sensor 3 4 E04 016 304 OH Low loss header OS ARN temperature sen 4 2 E04 016 585 No parameter change required A boiler e heating zone 105 System type 7 106 System 7 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 R Modulatingiroorn unit 13 14 E04 016 355 with timer T Calorifier tank Calorifier thermostat ST of tank sensor 5 6 E04 016 303 OH Low Loss Header 04 016 304 Diverter valve 28 29 30 31 3 way valve os Outside temperature 4 2 E04 016 585 sensor Parameter change required A boiler e heating zone System 8 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 pr MODUS roon unit 13 14 E04 016 355 with timer T Calorifier P2 DHW primary pump 29 30 31 ST Calorifie
27. FIVE TYPICAL EXAMPLES 8 A Twin pipe system with separate pipes for flue gas and air supply B Twin pipe system with separate pipes and concentric roof terminal C Single pipe for flue gas outlet only air supply from boiler room D Concentric pipe for flue gas air supply roof mounted E Concentric pipe for flue gas air supply wall mounted Ls pog air 1 0120 0120 0120 0120 C t3 O H UE H HE H UU H Example A Example B Example C Example D Calculations C13 C33 C43 C63 C93 C13 C33 C43 C63 C93 B23 B23P B33 C13 C33 C43 C63 C93 C13 C33 C43 C63 C93 Example E Because in each of the examples A to E the resistance of all components is known for this boiler as well as the resistance per straight meter for every of these particular examples the maximum straight length can be calcula ted for which the total resistance is still fulfilling the requirements i e R lt 160 Pa The given max length for twin pipe systems is the total sum of flue gas outlet and air inlet straight lengths 0 100 mm rounded to integer meters The given max
28. Overpressure flue gas systems For boiler classification B23P and for overpressure flue gas systems the minimum requirements of the flue gas material for Eco Boilers can be determined in a designation string according to the EN1443 see table European Tem Pres Resistance Corrosion re CE string flue gas materi standard perature sure to conden sistance class al B23P class class sate min requirement PP EN 14471 T120 min requirement StS EN 1856 1 T120 Metal liner Soot fire resis Distance to Plastics loca Plastics fire Plastics en specifi cations tance class combus tible tion beha viour clo sure material few examples of flue gas material suitable for Strebel boilers CE String for Plastic PP EN14471 T120 P1 W 2 O 30 I C EL CE String for Stainless Steel EN1856 1 T250 P1 W V2 L50040 50 Be aware by selecting flue gas systems that the minimum requirements are met So select only flue gas materials that have the same or better properties than this table 27 8 6 C63 certified In general boilers are certified with their own flue gas material If a boiler is C63 certified no specific type flue gas material has been certified in combination with the boiler In this case the flue gas material does not need to be certified in combination with the boiler but should be fit for purpose and comply with the applicable European standards It must be able to handle the condensate forming and transpor
29. UP2 IGE UP4 o IGE UP10 If the product is being fuelled with LPG then the appropriate UKLPG Codes of Practice CoP should be referred to Wiring to the appliance must be in accordance with the IEE BS 7671 Wiring Regulations the Health and Safety Document No 635 The Electricity at Work Regulations 1989 and any local regulations that apply CP 342 Part 2 1994 Code of practice for centralised hot water supply buildings other than individual dwellings CIBSE Guides A B and C Adhere to all regulations that are in force at the time of installation or service 2 TECHNICAL DATA OF THE Strebel S CB Px 120 BOILER 2 1 Functional introduction The S CB Px boilers are central heating boilers with a maximum high efficiency Such a performance can be reached by amongst other things using a special heat exchanger made of stainless steel The heat exchanger allows the flue gases to cool down below the condensation point releasing extra heat This immediately improves the efficiency considerably The S CB Px 120 boiler is standard set for Natural Gas G20 Gases used must meet the European standard EN 437 Fuel used should have sulphur rates according to the European standard a maximum annual peak over a short period of time of 150 mg m and an annual average of 30 mg m Boiler control includes Cascade control for up to twelve boilers Remote operation and heat demand indication from each boiler Weather com
30. activate the boiler press ON OFF button for three seconds Reason Reason Activate the boiler by pressing the ON OFF button for six resp three seconds After this the following display will appear Displey message 2 2 5 1 2 3 4 C 1 2 3 4 C Reason Boiler is active but there is no heat demand When no water is present in the boiler or water pressure is too low high the boiler will go into lock out and show a corresponding message in the display 82 By pressing the SERVICE button of the boiler the boiler can be started without a heating demand The boiler will start to fire and also the pump will start to run Firing of the boiler without a water flow but filled with water will cause the so called boiling noises Check during this service function operation also the flow and return tem peratures of the boiler by pressing the lt button once The temperature difference of the flow and return must be at least 13 C and maximum 25 C This temperature difference indicates that there is a sufficient water flow over the boiler this water flow protects the heat exchanger against possible damage caused by a thermal overload Another safety feature of the boiler to make sure that there is enough water flow over the boiler is the monitoring of the flow and return temperatures T2 and T1 When the temperature difference delta T between the flow and return e
31. boiler connections Calorifier temperature sensor 10kKOhm 25 C to be mounted to the boiler connections E04 016 303 Conversion set for parallel to concentric flue air terminal 100 100 100 150 E61 001 186 Software interface cable for programming the boiler with a computer laptop 504 016 586 Propane butane air restrictor kit 505 000 149 4 2 Unpacking The S CB Px 120 boiler will be supplied with the following documents and accessories One Unpacking instructions document e One Mounting user and service instructions manual e suspension bracket e Siphon with condensate discharge hose e spare fuse and two burner door spare nuts attached to the front of the gas valve After delivery always check the boiler package to see if it is complete and without any defects Report any imper fections immediately to your supplier 13 5 INSTALLATION OF THE S CB Px 120 5 1 General notes At both sides of the boiler at least 50 mm of clearance should be applied to walls or wall units 350 mm above the top side of the boiler and enough distance from the bottom side of the boiler so that the pump can be mounted here The installation area room must have the following provisions e 230 V 50 Hz power source socket with earth connection e Open connection to the sewer system for draining condensing water e Asound deadening wall e wall used for mounting the boiler must be able to hol
32. check if an outdoor sensor is present and does not detect an outdoor sensor Corrective action Check for loose wiring connections in the outdoor sensor circuit Check the state of the outdoor sensor and replace it if necessary p splay messas ES Reason Temperature difference between flow and return has exceeded the blocking value but not the lock out value Cause The water flow through the unit is too low Corrective action Check functioning of the pump Check open all valves that might restrict the water flow through the unit Check for an external system pump that influences the flow through the unit Check if the system resistance exceeds the spare capacity of the unit pump Make sure the heat exchanger is clean Heat exchanger fouling partly blockage will increase the resistance causing the water flow to drop General blocking circuit is activated during operation general blocking contacts 7 8 Display message Reason Cause The circuit connected to the general blocking terminals is not closed Corrective action Check all external components that are connected to the general blocking terminals and check why the contact is not closing during heat demand Cause If used in combination with flow switch The water flow through the unit is too low Corrective action Check functioning of the pump and the
33. contact your supplier stating serial number 10 E04 012 027 Burner 10 6 11 E07 001 029 Gasket Burner amp gas air inlet pipe 12 E06 021 001 Screw M5x14 13 803 000 164 Gas air mixing pipe S CB Px 120 14 E07 001 049 Gasket gas air inlet pipe amp fan 58mm 15 E04 016 132 Fan RG 148 16 E05 001 234 Distance ring venturi 17 504 000 392 Venturi Assy 5 Px 120 18 504 000 393 Gasvalve assy B J coils 19 507 002 018 O ring 33x2 NBR 20 504 000 213 Insulation burnerroom 16 mm 21 804 016 582 Fuse 5 at 10 pcs 22 Boiler control S CB Px 120 State type and serial nr 23 504 000 224 Display BIC incl cable 24 E05 001 062 Rubber plug 015 25 S1711EN Protective cover S CB Px 120 ENG 26 504 000 280 Heat exchanger A120 10 6 27 E04 016 621 NTC flue gas sensor 28 E07 003 108 Gasket bottom plate flow return S CB Px 120 29 504 000 253 Pressure transmitter 4 bar 30 E07 001 107 Gasket 216 09 x 2mm EPDM 65 Shore 112 31 1720 Flow pipe assy S CB Px 120 32 E09 002 022 Spring coupling 33 E07 002 033 O ring 233 50 x 4 00 34 1721 Return pipe assy S CB Px 120 35 E04 018 110 Lip seal 100 mm air inlet 36 E04 016 656 NTC flue gas sensor 1 8 37 E04 016 274 High limit thermostat 100 C 38 507 004 024 Seal ring 100 mm 39 505 000 148 Flue gas check valve assy 2100 40 801 000 397 Adaptor 2100 mm with check valve 41 E07 001 081 Silicon gasket 100 120 Evo
34. ene ee ee ur EH ES ES REESE Function for the setting of the water pressure Up to 4 bar a sensor is used up to 6 bar a switch 0 off 1 sensor 2 7 switch Menu D General Dis ern E Rn s EE E t Pr E ES Function to select the gas type 0 G20 G25 1 631 2 According to 437 Menu D General Function for setting the soft start option 0 normal start up 1 reduced fan ramp up speed 1 2 reduced fan ramp up speed 11 Menu D General Function Pump mode 0 normal 1 7 relay 1 connector 19 and 20 lock out 2 7 relay 2 connector 21 and 22 burner burning 3 relay 3 connector 23 and 24 heat demand 4 7 relay CN10 connector 9 and 18 65 10 17 Fault codes display The following graphs describe the lock out codes of the boiler A lock out code can only be removed by a manual resetting of the boiler NOTICE Before resetting the boiler always check the boiler central heating system and all components corresponding to the related lock out description Never just reset the boiler before analysing the possible cause of failure 10 17 1 LOCK OUT CODES Having a lockout means that the boiler needs a manual reset to start operating again When the boiler is in lockout the backlight of the display is blinking on and off Explanation gt 9 9 9 5 h r s time elapsed after fault amp message Explanation P u m p 1
35. flow switch Check open all valves that might restrict the water flow through the unit Check for an external system pump that influences flow through the unit Check if the system resistance exceeds the spare capacity of the unit pump Make sure the heat exchanger is clean Heat exchanger fouling partly blockage will increase the resistance causing the water flow to drop Display message Bi o c k PT TTT TT tt ejejoj 5 The unit is programmed in such a way that none of the boilers in a cascade will fire if one has a lock out One unit has a lock out and therefore the whole cascade is blocked 16 3 Maintenance reminder function The display shows alternating the base screen and this message while backlight is blink ing The boiler is operating but will count the exceeding hours A parameter must be changed after service to remove this message Display message Njeje ate MR LM 10 je yjejtjejs jhjrjs Maintenance option of total amount of ignition cycles has been reached Display message d s maim LEES ES Maintenance option of the date has been reached message Bju r nji n g jhjo uiris jhjrjs Reason Maintenance option of total amount of burning hours has been reached Display message Ale
36. heating up the hot water storage tank once a week to a higher water temperature then the normal active hot water set point Also the period that this higher water temperature function must be active can be programmed NOTICE The standard factory setting for this Legionnaires disease pasteurisation function is OFF To activate this Legionnaires disease function some parameters must be programmed by the manufacturer supplier The starting day and starting time of this Legionnaires disease function can be programmed at the control panel of the boiler There are several parameters being used for this function Three of these parameters are shown in the following graph With parameter P2 KI the heating CH demand can be interrupted to provide heat for the anti Legionnaires dis ease demand When no interruption is activated the boiler will wait for the end of the heat demand before the anti Legionnaires disease function starts The standard factory setting for this function is OFF P5CI 5 C P5CD 70 C This is the bandwith within which the Legion This is the maximum temperature naires temperature must stay during the pro during anti Legionnaires disease grammed period In this example the temperature function period is allowed to fluctuate between 65 C and 70 C 80 during the anti Legionnaires function Normal setting Normal setting water water temperature P5CJ 80 min temperature Wate
37. inch Point of view in next picture gt Burner door gaskets When these gaskets have changed colours at some parts the rubber has cured and or has damages these gas kets must be replaced Notice only use the gaskets that are supplied by the boiler manufacturer Fan When the fan blades are polluted and dirty carefully clean the blades with a soft brush Notice do not use too much force on the blades or else the fan might be out of balance and run irregularly causing noises and fan fail ures Check the fan also for any water damages In doubt always replace the fan of the boiler Insulation The insulation of the heat exchanger located on the rear wall inside the heat exchanger and burner door must be inspected If this insulation disk shows any signs of water damage or degradation it should be exchanged Also check if there are any indications in the burner room of a high condensate level caused by a blocked siphon that might have wetted the rear wall insulation When this has happened the rear wall insulation should also be re placed Only use the insulation disk that is supplied by the boiler manufacturer The same procedure must be applied on the insulation and gaskets fitted on the burner door Siphon The siphon must be checked at least once a year Disassemble the siphon and clean every part of it Check the functioning of the siphon by filling it with water Then blow into the top condensate
38. inlet and gently increase the pressure At some point water starts coming out of the siphon outlet During this the float ball should gradually drop into its seat By doing this the ball then should close the outlet almost completely Heat exchanger and burner room After the removal of the complete burner unit check if there is any debris and dirt in the heat exchanger The coils of the heat exchanger can be cleaned by using a non metallic brush After this the dirt and dust can be removed with a vacuum cleaner and by flushing the burner room with water Don t forget afterwards to clean the siphon once again N Cleaning the burner room with acid or alkali products is prohibited 102 Gas air ratio With every service check and or maintenance of the boiler always check the gas air ratio by measuring the percentage flue gas at the maximum and minimum load of the boiler If necessary adjust these values See for information chapter 15 Adjusting and setting the burner Pump Check the electrical parts and the motor of the pump for a correct functioning The pump must generate a suffi cient water flow over the heat exchanger of the boiler When the pump produces noise is operational for more than five years or has signs of water leakage it is recommended to replace the pump as a precaution When defects and abnormalities are found by the service engineer during service and maintenance and N these are not repairable this
39. lt iC a nic e t gt C o nifjijrim Press 4 to cancel the changes or gt to confirm the changes Hereafter the boiler returns to the operating screen Go to next page 55 From previous page Screen Selecting message at certain date 4 post Fed e E Press gt to set The date for the maintenance message Press 4 to Return to maintenance mode selection Press gt to browse through the values that can be set at the bottom line The blinking value can be changed with A amp V Press 4 to cancel the changes or to confirm the changes Hereafter the boiler returns to the operating screen Screen Message after total amount of ignition cycles Press gt to set The total amount of ignition cycles for the Maintenance message Press 4 to Return to maintenance mode selection The blinking value can be changed with A amp V gt Press ENTER to confirm the changes Confirmation screen Confirmation screen lt 1 gt Cjo nifji jr m Press 4 to cancel the changes or to confirm the changes Hereafter the boiler returns to the operating screen Go to next page
40. reset Press gt to confirm the changes The last alternation will be blinking for a few seconds and return to base menu Press MENU to exit The boiler will reset and go to the operating Screen Press 4 for next SCREEN Copy programmed day for DHW fj rio m D HjW jtjoj Press gt to switch between Copy from and Copy to The blinking day is selected and can be changed Press A amp V to change the selected blinking value Press ENTER for confirmation screen when all settings are done j lt l 1 gt Clo nifiiirim Press 4 to cancel the changes made unit will reset Press gt to confirm the changes The two days will blink for a moment gt Press MENU to exit The boiler will reset and go to the operating screen Press 4 for next SCREEN gt gt gt Continue on next page LEGIONELLA program lt ANTI LEGIONNAIRES DISEASE PROGRAM The anti Legionnaires disease pasteurisation program of the boiler can only be used when the boiler is set as an indirect boiler configuration or a direct hot water boiler configuration Only these configurations can activate the day and time program of the anti Legionnaires disease function See the following graphs The standard fac tory setting for this function is OFF gt gt gt Fr
41. the boiler these are CH program DHW program Anti Legionnaires disease pasteurisation program HEATING PROGRAM Three programmed periods each day can be set period 1 period 2 and period 3 During these periods the unit will use the normal CH and DHW set point Outside the programmed period s the unit will use the reduced tem perature as set point When there is no time programmed for a period it will not be used Example no time programmed in period on Monday gt Mon 3 Operating screen H EJA T N G b oJi t e r Jo f f 21212 1 1112 3 14 C CI 1 2 3 4 C Press MENU Select Timer using 4 amp gt and press ENTER Main menu screen Mjla iln j EE EC BR PERTH EE ESTER ER ER Press ENTER Setting CH program times IPirjo g rjaim C H IMjo n 1 0 6 0 0 2 3 0 0 Press gt to browse through the values that be set at the bottom line The blinking value can be changed Press A amp VW to change the selected blinking value Press ENTER for confirmation screen when all settings are done lt Cla n c e gt j Clojnifji rim Press gt to confirm the changes The last alternation will be blinking for a few seconds and return to base menu Press MENU to exit The boiler will reset and go to t
42. to tank coil ssssssssse esee 76 11 3 5 Heating and hot water switching time 77 11 3 6 Heating and hot water switching at sudden temperature 77 11 3 7 Anti Legionnaires disease function pasteurisation seen 78 11 4 CASCADE CONTROL mcm 79 11 4 1 Parameter settings for cascaded boilers 21 1 000000000000000000000000 79 11 4 2 Monitor Screens dde eid epa 81 11 4 3 Output control and boiler 81 12 13 14 15 16 17 18 19 20 21 COMMISSIONING THE BOILER EENAA NAR ANNA NANAREN 82 12 1 FIRST FLUSHING THE BOILER WITH WATER i cien retta Beati iue Pasar benda re Tuas dd 82 12 2 SECOND FILLING amp VENTING THE BOILER AND THE SYSTEM 82 12 3 THIRD CHECK THE WATER FLOW chasm Die TA i 82 STARTING THE BOILER 5 Satire 84 13 1 SGENERAL at Nae d ues INE seca Li sete LEUR ML 84 13 25 FIRING FOR THE FIRST TIME cass ss ca pee ha cheb cus sm edt mau dh ooh oie ARE 84 ADJUSTING AND SETTING THE BURNER 85 14 1 SETTING AT THE MAXIMUM 1 reacted oe ee 85 14 2 SETTING AT
43. unit is too low Corrective Action Check functioning of the pump Check open all valves that might restrict the water flow throught the unit Check for an external system pump that influences the flow through the unit Check if the system resistance exceeds the spare capacity of the unit pump Make sure the heat exchanger is clean Heat exchanger fouling partly blockage will increase the resistance causing the water flow to drop Display message h i g n tji m i tj F17 oln 9 9 9 5 n r s Cause The water flow is restricted Corrective action Check functioning of the pump Check open all valves that might restrict the water flow through the unit Check for an external system pump that influences the flow through the unit Check if the system resistance exceeds the spare capacity of the unit pump 95 96 16 2 Blocking codes The display is not blinking but is lightened up during the blocking period The boiler is blocking an action because of an extraordinary situation This action will be continued after stabilisation of this situation Display messege emp Reason Flow temperature has exceeded the blocking temperature but it has not exceeded the lock out value Cause The water flow is restricted Corrective action Check functioning of the pump Check open a
44. 0 SPARE PARTS LIST WITH PART NUMBERS csset nennen 112 e 114 S CB Px 120 Manual INTRODUCTION This manual is written for The installer system design engineer The service engineer Please always check that you have the latest version of the manual the latest version is available on our web site www strebel co uk The version number of the manual is shown in the bottom right hand corner of the front cover abbreviations NB NOTICE symbols Warning important information related to the safety of persons and or the appliance All documentation produced by the manufacturer is subject to copyright law 1 SAFETY GUIDELINES Carefully read all the instructions before commencing installation Keep these instructions near the boiler for quick reference The appliance should be installed by a skilled installer such as GAS SAFE registered person electrical work car ried out by a qualified person all according to national and regional standards Failure to comply with these regulations could deem the warranty invalid This appliance must be installed in ac cordance with the rules that apply and only be used in an adequately ventilated space conforming to standards in place Without written approval of the manufacturer the internals of the boiler may not be changed When changes are executed without approval the boiler certification becomes invalid Commissioning maintenance and repair must be
45. 0 VDC control signal PARAMETER A parameter change is needed NOTICE Terminal 13 positive and Terminal 14 negative 15 16 CASCADE CONNECTION These connections are used when boilers are cascaded with the internal cascade manager for control ling the total cascade NOTICE Connect all terminals 15 and all terminals 16 together do not switch between these terminals 17 18 LOCK OUT OR PUMP ON OFF This contact is N O normally open When the unit is in lock out this contact will close This contact can also be used for the switching of a pump with a separate control connection in which case a parameter change is needed 19 20 BURNER BURNING OR EXTRA BOILER OR PUMP ON OFF This contact is N O normally open When the unit starts the burner and detects the flame this con tact will be closed This contact can also be used to control an external extra boiler or for the switch ing of a pump with a separate control connection In the latter two cases a parameter change is need ed 21 22 BURNER DEMAND OR PUMP ON OFF This contact is N O normally open When the unit receives any heat demand this contact will close This contact can also be used for the switching of a pump with a separate control connection in which case a parameter change is needed 23 24 25 CH SYSTEM PUMP P3 Connection for a central heating system pump P3 NOTICE The power of this pump P3 combined with
46. 1 Slave 1 Slave 2 Slave 3 Slave 4 Master Slave 7 Slave 6 Slave 5 Table boiler sequence example of an eight boiler cascade In this table a total of eight boilers one master seven slaves is mentioned as an example in practice the maxi mum number in a cascade without extra external control is twelve boilers 81 12 COMMISSIONING THE BOILER 12 1 First flushing the boiler with water After installation of the boiler the first step before commissioning is to flush the boiler and the whole heating in stallation with fresh water to remove pollution debris and other materials that might cause a blocking This must also be done with heating installations where only the boiler is replaced 12 2 Second filling amp venting the boiler and the system After flushing the boiler and the installation the system can be filled with fresh water Fill the boiler and the heating system by using the appropriate filling valve The water pressure of the system should be between a minimum of 1 bar and a maximum of 4 bar also depending on the applied pressure safety valve NOTICE Use the following aspects to prevent corrosion of the central heating system e Filling water do not use any additives for the water of the central heating system The pH value of the water should be more than 5 If this pH value is less please contact the supplier e Ensure that any used plastic pipes are oxygen diffusion pr
47. 399 42 507 004 030 Seal ring 3 43 E01 004 157 Wall bracket 44 E04 015 008 Automatic air vent 45 E04 010 033 Tube gland 038 mm 46 Rear wall high temp Limit switch Consult factory for replacement 47 E04 010 143 Hoseclamp DW 13 48 E04 007 131 PVC hose 21x15 L 340 mm 49 E07 003 102 Gasket siphon bottom plate 50 E05 000 146 Condensate drain assembly 51 501 000 394 Side panel right S CB Px 120 52 E04 007 038 Condensate drain hose 750 mm 53 E07 003 101 Gasket bottom plate gaspipe 54 E05 000 064 PG 9 swivel cable gland 8mm 55 E05 001 227 Plug 16 5 mm Transparant 21 INDEX 0 10 vdc remote burner input con trol 74 0 10 vdc remote flow temperature set point 73 3 way valve diverter valve 9 31 75 accessories 13 accessories and unpacking 13 adjusting and setting the burner 85 air separator 22 ff air supply 14 26 air venting 20 20 anti Legionnaires disease pas teurisation function 78 article numbers 13 automatic air vent 20 automatic water filling systems 20 blocking 19 31 66 72 82 90 100 boiler connections 16 boiler room 14 bypass 18 C63 boilers 27 checking the fault history 54 checking the operating history 53 cleaning of the burner 100 closed boiler 14 26 combustion air quality 26 commissioning the boiler 79 connections electric 31 ff connections gases miscellaneous 26 ff connections water miscellaneous 15 ff control panel
48. CONNECTIONS nee Renee reet ren ete ERR Euer ERR ERE eren VANU 16 6 1 GENERAL re Ide ineunt ence ded ues 16 6 1 1 MOUNTING EE 16 6 1 2 Gas connection oa eat ate ee ae eoe sed aes 16 6 2 CONDENSATE DRAIN 4 4 4 4 42221000 nnne nen 17 6 3 FLOW AND RETURN 8 enemies inire rennen rennen ns 18 6 4 THE EXPANSION VESSEL D 18 6 5 PRESSURE RELIEF VALVE cere acea diea deemed diea ced dida 18 6 6 BYPASS cq 18 6 7 18 6 8 FROST PROTECTION EE 19 6 9 INSTALLING A STRAINER AND OR DIRT 19 0 10 WATER QUALITY EE EE 20 6 11 PLASTIC PIPING IN THE HEATING 5 5 rN 20 6 12 AUTOMATIC AIR VENT a Ded tke Eo bebe rie sd oreet a had 20 619 AUTOMATIC WATER FILLING SYSTEMS 1 25 3 epe i ei ila 20 6 94 WATER PRESSURE ion ea bot oou poire 21 6 15 CHEMICAL WATER TREATMENT
49. D 2 BUTANO PROPANO BUTAAN PROPAAN In the example on the right propan and P4BD 1 have been marked 11 1 6 SOFT START OPTION Start parameters can be modified to achieve better start behaviour in case of noise or other difficulties This is done by reducing the fan ramp up speed Two reduced settings are available and II P4 BE Soft start 02normal 1 reduced fan ramp up speed I 22 reduced fan speed ramp up Il display D9 0 normal start up 1 reduced fan ramp up speed 1 2 reduced fan ramp up speed 11 11 1 7 PUMP MODE EC TECHNOLOGY When using a pump with Electronic Commutation technology and start stop function this parameter determines the relay for switching the pump on and off P5 BN A A modulating pump with PWM control the power supply is directly connected to the mains the PWM connection is connected to CN10 contacts 9 and 18 Pumps with an on off control can be switched by one of the relay connections lock out demand Choose a connection which is not yet used Pump mode 0 normal 1 relay1 2 relay2 3 relay3 display DA Do not use the 230 Vac relay for the main power supply of the pump but directly connect the pump to an external power supply burner burning or heat PWM 0 100 modulating pump connection CN10 connectors 9 and 18 Start stop through relay 1 connectors 19 and 20 lock out Start stop through relay 2 connectors 21 and
50. ND SETTING THE BURNER The burner must always be adjusted and set when Anew boiler is installed A service and maintenance check has been done e gas control safety valve has been re placed After these proceedings always check the gas air ratio of the combustion figure CO2 at minimum and maximum input First set the boiler at maximum load and subsequently set at minimum load See the following description 14 1 Setting at the maximum load To start up the boiler in service mode press the SERVICE button for around 3 seconds After that the boiler will start up and when the service mode is activated the following screen will appear Display message Reason Boiler is activated and operates at service mode at 2796 minimum Use the A button to increase the actual load of the service percentage to the maximum The following screen will appear Pisplay message vicis 111040 gt gt gt 11 2 3 4 C 1112 31 Reason Boiler is activated and operates at service mode at 100 maximum When the boiler operates at maximum load measure the CO percentage at the flue gas outlet of the boiler This value should match the values given in the table below When needed adjust the gas valve setting by the adjust ing screw 2 see the drawing on last page p 84 Decrease CO percentage 2 Turn screw 2 right clockwise
51. STREBEL S CB Px 120 Wall hung high efficiency condensing boiler Installation Operating amp Maintenance Manual EJ STREBEL HEATING TECHNOLOGY 2015 04 21 v3 S CB Px 120 Manual INTRODUCTION E E 5 1 SAFETY GUIDELINES 2 rere Dra ene career aee eec ecce ra deno arx aevo te ree var o ean 7 2 TECHNICAL DATA OF THE STREBEL S CB 120 9 2 1 FUNCTIONAL INTRODUCTION uen ee indeed coo rie da ae oed eode ce ot c 9 2 2 TECHNICAL SPECIFICATIONS DATASHEET E EEA AR 10 DIMENSIONS e S 12 ACCESSORIES AND UNPACKING eer ecth neret trente etenim erri nenne iz rena 13 4 1 ACCESSORIES wi 13 4 2 UNPACKING 13 5 INSTALLATION OF THE S CB 120 onere rien erret rented etna re ri ara ue ere ea Roe ese 14 5 1 GENERAL NOTES Ceo doe lacie cada satan Lee Lee eda ene ddp uide dnas 14 5 2 MOUNTING THE BOILER dead eue e 15 6 BOILER
52. THE MINIMUM GRADU nea Ltd 86 14 3 GAS CONVERSION BUTANE PROPANE B P essent nnne tnnt 88 PUTTING THE BOILER OUT OF 2 444 44 89 15 1 OUT OF OPERATION ON OFF FUNCTION 89 45 9 OUT OF OPERATION POWER OFF Lcd ictus ak tute diced 89 FAULT CODES AND BLOCKING 8 4 4 90 HAW CODES oes dan tese cu ud cce eade end 90 16 22 SBEOOKINGICODESG encode mese rest 96 16 3 MAINTENANCE REMINDER 2 randa tec atentar ass 99 RR 100 TZ GENERAL Londen Aa 100 17 2 ANNUAL INSPECTION S MAINTENANCE s ridic ctio e vd are taa estan Gra oda dint 100 USER INSTRUCTIONS inei cec Sa A iia rre conica RD D RR sas YR ERR RR RR RR RR BARRE 103 INSTALLATION 8 104 S CB 120 SPARE PARTS OVERVIEW AND PART NUMBER 110 20 1 SPARE PARTS 3D DRAWING 5 ratus texte tires theme suc 110 20 2 S CB PX 12
53. TION Max flow temperature C 90 resistance of the boiler at AT Head mWC 38 ERE resistance of the boiler at AT Head mwc 24 Pressure CH system min max bar 1 4 ELECTRIC Power supply V Hz 230 50 Power consumption W 150 Protection class IPX4D NOTES 3 of the unit measured set without the boiler door in place Maximum combined resistance of flue gas and air supply piping at high fire 5 With a pressure switch instead of the standard sensor pressure may go up to 6 0 bar 11 3 DIMENSIONS 495 tt Combustion air inlet connection hole with sealing ring and pipe support bracket 2100 468 2 Flue gas outlet 828 Condensate discharge Flexible hose 025 21 x 800 mm Gas supply connection i ion flow connection Circulation return connection Circulation flow connectio Circulation pump side 12 S CB Px 120 Manual 4 ACCESSORIES AND UNPACKING 4 1 Accessories Depending on the selected controlling behaviour for the central heating system and or the optional use of a calo rifier the following items can be supplied with the boiler Ask your supplier for the specifications Item Part no Outside air temperature sensor 12kKOhm 25 C to be mounted to the boiler connections E04 016 585 External flow temperature sensor for behind the low loss header 10kKOhm 25 C to be E04 016 304 mounted to the
54. This parameter determines if only the Master boiler or all boil ers of the cascade are used for indirect hot water 0 All 1 Master Bic j DH d s c nit 2 3 ERE Pee Fon E e EF 63 64 Pasa ashlee LENS Function for the cascading of the boiler s This parameter is activated when an external extra boiler is connected to the Master boiler Connect to the Master con nections 21 22 5 clals 510 EET ERES Function for the cascading of the boiler s This parameter sets the function of the boiler at a cascade alignment 0 Single Slave unit 1 Master unit 6 ERES RES RS D E ES ES e Function for the cascading of the boiler s This parameter determines the function of the Slave boilers when the Master boiler is switched off 0 Slave boiler s continue operation 1 Slave boiler s switch off 7 Cjo m F ruNj uim ES EHE ER 8 RE PIED Function for the cascading of the boiler s This parameter determines the number of cascaded boilers that are implemented with a common flue system 1 jo 1 0 V c o n t r Ee ES OH ESTEE RN Function for the external control of the boiler by usin
55. a and or alkali agents dust sand and pollen Notice that installing a boiler near a swimming pool a washing machine laundry or chemical plants does expose combustion air to these contaminants 8 2 2 AIR SUPPLY THROUGH HUMID AREAS When the supply duct will be placed in a boiler room with moist air for example greenhouses a double walled supply duct or an insulated duct must be used to prevent the possible condensation at the outside of the duct It is not possible to insulate the internal air pipes of the boiler and therefore condensation at the internal air canals must be prevented When roof mounted the air supply duct needs to be protected against rain so no water will be entering the boiler No water is allowed to enter the boiler through the air inlet canal at any time 8 3 Flue terminal Never use aluminium containing flue gas materials for this boiler The flue terminal duct can be made of e Stainless steel of minimum temperature class T120 e of minimum temperature class T120 The flue gas material should be fit for purpose and comply with the applicable European standards It must be able to handle the condensate forming and transport over pressure and must have a minimum tem perature class of T120 Multiple boilers can be connected to a common duct At all times these flue gas systems for multiple boiler instal lations must be engineered as zero or negative pressure systems this to prevent the risk of recirc
56. ance must be put out of operation for a long period because of a defect or another safety risk Act as follows e Disconnect or switch off the room thermostat and or other external controllers from the boiler The CH pump and fan will stop after a short time e Switch off the boiler by pressing the ON OFF button for six seconds Make sure that the following display screen is visible Display message Be rie reti RR D Pa 1880180 Properties of the off function The keys do NOT respond and the menu is NOT accessible e The burner does NOT respond to an external heat demand boiler CAN however be switched on again by pressing the ON OFF button e Pumps fans and cascade if applicable are operational and so are both recirculation protection if applic able and frost protection e NOTICE Pump CH pump is switched OFF but this is NOT the case when the boiler is in a cascade e To reactivate the boiler switch the burner by pressing ON OFF for six seconds again The frost protection module can still activate the burner To prevent this switch off this protection or put the boiler in power off mode 15 2 Out of operation power off To assure that the boiler cannot become active at all anymore power should be cut off completely Act as follows e Disconnect or switch off the room thermostat and or other external controllers from the boiler The CH pump and fan will stop after a
57. ar a water pressure switch has to be built into the boiler instead of the water pressure sensor the maximum allowed value in the boiler now is 6 0 bar and the boiler control needs to be adjusted 6 15 Chemical water treatment The chemical compatibility of several products for treatment of the central heating equipment has been tested on the heat exchangers and the boilers A list of corrosion inhibitors in preventative and curative treatment for gas fired central heating boilers can be supplied by the manufacturer 6 16 Under floor heating When using an under floor heating system the boiler circuit must be separated from the heating circuit with a plate heat exchanger 6 17 Flush the system with fresh water The water of the boiler and heating circuit should be free of any particles debris and pollution Therefore the complete installation must always be thoroughly flushed with clean water before installing and using the boiler s 21 6 18 Installation examples 6 18 1 EXAMPLE OF ALOW RESISTANCE HEATING CIRCUIT HEATING ZONE valve air separator dirt separator strainer water filter pressure relief valve siphon pump automatic air vent zx expansion vessel 6 18 2 EXAMPLE OF A NORMAL SINGLE BOILER HEATING CIRCUIT PREFERABLE valve air separator dirt separator strainer water filter HEATING ZONE pre
58. at the pressure relief valve is mounted between the boiler and the service valves The pressure relief valve must always be installed in such a way that it cannot be isolated from the boiler by a valve The specifications and size of the relief valve should be determined by the installer and must comply with all applicable regulations and boiler capacity 6 6 Bypass The boiler has no internal bypass When many thermostatic valves are being used the system should have a bypass to allow an adequate flow when all thermostatic valves are closed Instead of a bypass also a low loss header can be used for this function The boiler flow will also be influenced when a pipe of the heating system is frozen blocked Make sure all hea ting pipes are free from the risk of frost If there is the risk of freezing of the heating system all the pipe sections must be insulated and or protected with the help of a tracing 6 7 Pump functionality e The external pump must be mounted in the return pipe of the boiler e boiler pump must be controlled by the S CB Px 20 boiler control If for any reason an exter nal pump control is applied without written approval of Strebel Ltd the complete warranty on the S CB Px 120 boiler and all supplied parts will become invalid High efficiency pump default settings The pump is controlled by a PWM signal from the burner controller Its set point is based on a delta T of 20 C This means that when the bur
59. been done For programming all parameters of the boilers one needs to have a laptop with the appropriate Strebel software and an interface cable for connecting the laptop to the boiler control one order no 804 016 586 This software is used for programming but also shows all measured temperatures and cascade behaviour during operation and service fault history 11 4 1 PARAMETER SETTINGS FOR CASCADED BOILERS Before programming the cascaded boilers make sure that all boilers are connected wire with each other Use connection 15 and 16 of each boiler Remind do not alternate these connections so always connect 15 to 15 and 16 to 16 After connection every boiler must be programmed This can be done at the control panel Press the MENU but ton and select the PARAMETER menu See graphics below Operating screen H EJA T I NJG S T AJN D B Y 2 2 11 2 3 4 C 1 2 3 4 C Press MENU Mlelnu pore ee ri Ies c Select Parameter using 4 amp gt and press ENTER After this use the password for installer s level 2 Parameter menu Enter the 4 digit code with the 4 amp gt and the A amp V buttons and select ENTER The code will blink a few seconds and when entered correctly the following parameters will be displayed 79 PARAMETERS PSDF 1 P5DA 0 boiler
60. boiler inch R 1 Gas connection inch 34 Parallel connection mm 100 100 CENTRAL HEATING EN437 Values min max Nominal input Net kW 26 0 111 Nominal input Hs G20 G25 kW 28 9 123 Nominal input Hs G31 kW 28 3 121 Nominal input Hs G30 kW 34 7 120 Nom output 80 60 kW 24 7 106 Nom output 50 30 kW 27 2 116 Nom output 37 30 kW 28 1 120 Efficiency 40 30 C DIN 4702 8 up to 110 6 GAS CONSUMPTION EN437 Values min max Natural gas G25 m h 3 20 13 7 Natural gas G20 2 75 11 8 amens Propane gas G31 ms h 1 06 4 54 Butane gas m h 0 99 3 44 G25 mbar 25 Supply pressure G20 mbar 20 nom 2 G31 mbar 30 37 G30 mbar 50 NOTES 1 When using propane or butane a special air restrictor kit is needed See accessories list on page 13 and picture page 86 Below a table is given in which the min and max gas supply pressures are mentioned according to EN437 p nominal mbar p min mbar p max mbar G25 25 20 30 G20 20 17 25 G31 30 25 35 37 25 45 G30 50 43 57 10 FLUE SYSTEM min max G25 G20 96 8 5 9 0 CO flue gas 6311 9 6 10 3 G30 B P 9 6 10 4 NOx class EN483 EN15420 5 m 22 2 NOx emission at 0 O5 year emission T 39 9 flue gas at combustion air temp 85 95 20 Available pressure for the flue system Pa 160 INSTALLA
61. boiler has a built in frost protection which is automatically activating the CH pump when the boiler return temperature drops below the 5 C When the boiler return temperature drops below the 3 C the burner is also ignited The pump and or burner will shut down as soon as the return temperature has reached the 10 C The mentioned temperatures are related to the temperatures measured by the RETURN sensor of the boiler This frost protection function will not fire up the boiler in case of a general blocking of the burner demand NOTICE This frost protection is only to reduce the risk of frost damage to the boiler not the whole system Be aware that flow restrictions in the system caused by frozen pipes will also prevent the water flow needed for the boiler frost protection function to work Because it concerns a programmable setting boiler damage caused by frost freezing will affect warranty 6 9 Installing a strainer and or dirt separator SYSTEM WITH DIRT SEPARATOR Always install a strainer water filter and or a dirt separator in the return pipe Se eeu DIRT SEPARATOR WATER FLOW of the boiler in such a way that the wa SYSTEM TO BOILER S ter going to the boiler is free of any de bris particles When using a water filter always check a week after installation to determine the strainer cleaning interval Advice is to mount valves before and after the strainer including an air bleed valve so the strainer can be isolated from the h
62. ce specifications page 55 Service intervals The normal service frequency for the boiler is once a year Every year the boiler should be cleaned and checked according to the maintenance procedures If there is doubt whether the boiler is operating with the correct water and or combustion air quality it is advised that a first check is already executed after six months This check serves to determine the frequency of the future services The maximum interval between two services is a year N INSPECTION AND MAINTENANCE MUST BE EXECUTED FOR A SAFE AND EFFICIENT OPERA TION OF THE BOILER 17 2 Annual inspection amp maintenance Inspection maintenance and the replacement of boiler parts should only be done by a skilled service engineer Apart from the maintenance proceedings it is advised to have a log chart for every boiler that describes the follow ing aspects e Serial number Date and time of maintenance of maintenance engineer e Which parts were exchanged during maintenance e Which settings software were changed during maintenance e Special remarks findings e Future aspects that need extra attention e Additional aspects measurement reports complaints by the end user lock out codes etc During maintenance the following parts and aspects of the boiler should be checked and inspected NOTICE Before starting to work on the boiler e Switch off the electrical power to the boiler service switch and or u
63. cted hysteresis during the pasteurisation function of the boiler B 7 Jhjo id EE LR ES E LUN ERE ais Pasteurisation function of the boiler This parameter is the selected time period for the pasteurisation function of the boiler Bia L e g ijo Ji nit r Esa EST ERO ER RR ES ERR EHE Pasteurisation function of the boiler This parameter controls if the CH demand can be interrupted by the pasteurisation function of the boiler 0 Yes 1 No Bio D H d s c O f f 2 E E D P EE E ER 2 Function for the direct hot water boiler This parameter is de off set of the selected HW temperature of the boiler 23 Function for the direct hot water boiler This parameter is the proportional range of the selected HW temperature of the boiler EB IBD COE ESSE HR ER CERES TTT fel s ear et rn Function for the direct hot water boiler This parameter is the hysteresis of the selected HW temper ature of the boiler Menu B Hot water Function for the direct hot water boiler This parameter is the integration time of the selected HW temperature of the boiler Menu B Hot water B D I TERRE ER 8 T 80 Function for the cascaded direct hot water boilers This parameter is the offset of the sel
64. ction of the boiler When the Schornsteinfeger button is pressed for 3 seconds the heater will fire at minimum firing rate 96 In this state the display shows imjojd e When the button is pressed briefly again the heater will fire at 50 firing rate In this state the display shows When the button is pressed briefly again the heater will fire at maximum firing rate In this state the display shows sje riv ije e m oidje Mia x i muulm When the button is pressed briefly again the heater will return to the normal operation mode The Schornsteinfeger function is switched off NOTES When the heater is burning during Schornsteinfeger function when top display line shows Flue service mode and no button is pressed for 12 minutes the boiler will return automatically to normal operation mode The Schornsteinfeger function will be switched off The Schornsteinfeger function can be activated for the user by programming a parameter P5 BK All regular temperature safety controls remain active and the boil er water heater pump and the system pump are running 43 10 7 Programming in standby mode Standby Use the standby mode for modifying boiler settings without interaction with the boiler control Changes are ef
65. d one must measure a negative pressure 10 3 Pa This measured pressure is valid for natural gas propane and propane butane mixtures If the measured pressure is not within this range check the complete gas air unit consisting of the gas valve venturi fan and burner plate for defects and or mounting errors Also make sure that the measuring devices both CO meter and manometer are functioning well NOTICE After the setting has been done at minimum load go back to maximum load and check if it still gives the right CO level as specified for maximum load in the table adjust the gas valve if necessary After readjustment go back to minimum load and check again the CO level and gas valve pressure adjust if nec essary Keep toggling between maximum load and minimum load up to the point that no adjustments are needed any more and the CO levels and gas valve pressure are within the specified ranges After these adjustments return to normal operation by pressing the SERVICE button IMPORTANT Make sure that the screw s on the measuring points are mounted again after the work on the gas valve has been finished 87 14 3 Gas conversion butane propane B P To use another type of gas with the boiler only a conversion kit for butane propane is needed which consists of an air restrictor and an o ring to air tighten the gap between the fan and the venturi This changing of gas type involves a different calorific value and comp
66. d for the boiler to operate for CH demand in case of a DHW demand After this period the boiler will switch to operate for DHW demand even when there is still a CH demand The standard factory setting for this function is that the hot water demand always has priority and that no switch ing between the heat and hot water demand happens when both are active 11 3 6 HEATING AND HOT WATER SWITCHING AT SUDDEN TEMPERATURE DROP This function can be used to detect indirect water tank calorifier heat demand in case of a sudden temperature drop within the range between the set point and the minimum value at which the boiler is normally switched on For this parameter is chosen the value of the temperature drop detected within one second at which an immedi ate indirect hot water demand is activated SET POINT OFFSET BOILER OFF E SETPOINT 2 gt The parameter acts in this temperature range a 2 lt a a ALLOWED TO MODULATE E Y BOILER ON n a n P2KH Gradient heat demand detect DHW tank temperature display BG See the given explanation The standard factory setting for this function is OFF 77 11 3 7 ANTI LEGIONNAIRES DISEASE FUNCTION PASTEURISATION This function can only be used for an indirect programmed boiler parameter P4 AA 1 on which a DHW pro gram is active To prevent Legionnaires disease the boiler software provides a function for
67. d the weight of the boiler Other considerations related to the boiler location e ventilation of the boiler room must meet all applicable standards and regulations regardless of the se lected supply of fresh air to the boiler location e Both the air supply and the flue gas tubes must be connected to the outside wall and or the outside roof installation area must be dry and frost free boiler has a built in fan that will generate noise depending on the total heat demand The boiler location should minimise any disturbance this might cause Preferably mount the boiler on a brick wall e There must be sufficient lighting available in the boiler room to work safely on the boiler e When a boiler is positioned at the highest point of the installation the supply and return pipes must first pro trude 0 5 m above the top of the boiler before these pipes go to the installation side In other words the water level must always be 0 5 meter above the top of the boiler and an automatic air vent must be installed in the supply or return pipe A low water level protection should also be installed at the installation side e Notice the positioning of electrical components in relation to the temperature sensitivity Make sure there is an open connection with the sewer to drain the condensate This connection should be lower than the condensate drain level of the boiler lt Apply an open connection to the sewer
68. daptive restriction it must be replaced Gas supply amp safeties The gas pipes must be checked for gas tightness Also check if the mounting of these pipes is correct safe and not damaged Any built in safeties should be checked for a correct functioning Remove complete burner unit The complete burner unit consists of the fan the burner plate and the internal burner To remove this part loosen and remove the six nuts on the burner door and disconnect the ignition cable and ground wire connector When the inlet venturi and the cables connected to the fan are disconnected one can pull the burner door assembly outwards about 5 6 cm While keeping the burner in the heat exchanger one can turn the whole unit clockwise until the black fan motor cover touches the foam on the inside of the left side panel Gently press the black fan cover in the foam creating just enough clearance for the bottom of the fan housing to slide just over the connection terminals If this clearance is ensured one can pull the whole burner door assembly outwards and thereby remove it from the boiler NOTICE To make removal more easy one can loosen and remove the three mounting screws in the bottom half of the left panel Two screws are situated on the bottom of the boiler on the ridge of the left side panel and one is situated in the display console in front at the front ridge of the left side panel After this one can bend the bottom of the left side panel outwar
69. done by a skilled installer engineer according to all applicable standards and regulations What should one do when there is the smell of gas Don t use any electrical equipment Don t press any switches Close the gas supply Ventilate the room open the windows and or outside boiler room doors Immediately warn the responsible person The manufacturer supplier is not liable for any damage caused by inaccurately following these mount ing instructions Only original parts may be used when carrying out any repair or service work This appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or N instruction concerning use of the appliance by a person responsible for their safety Children should be supervised to ensure that they do not play with the appliance These instructions are written for the installer of Strebel products and contain all necessary information on the installation and adjustment of S CB Px 120 boilers Please read these instructions fully before installation to en sure that all work is carried out correctly We suggest that you keep a copy of these instructions near the boiler These instructions together with those in any supplemental instruction booklet cover the basic principles to en sure the satisfactory installation of the boiler although detail may need slight modi
70. ds while the panel is still fixed with the two side panel mounting screws on top This will create more clearance for the removal of the burner door assembly NOTICE When handling the burner door assembly during removal mounting and maintenance be sure that the insulation of the burner door is not damaged Burner Check the burner surface to see if it has damages signs of rust and or is cracked When the burner surface is damaged the burner must be replaced The burner can be cleaned by using a soft non metallic brush The dust can be removed with a vacuum cleaner or pressurized air Ignition ionisation electrode When the complete burner is removed it is very easy to check the ignition electrode First check if the distances between the electrodes and between the electrode and the burner are according to the graph below When these are not correct try to bend the electrodes in the right position Notice the electrodes undergo high temperatures therefore the electrodes become hard and are difficult to bend While bending used electrodes they might break or burst Check the electrode after bending for any tear crack and signs of rust When they are burst cracked or rusty replace the electrode Also replace the electrode when there is a crack in the ceramic insulation of the elec trode When the electrode is going to be replaced also the gasket should be renewed 101 3 5 mm 0 14 inch D 8 10mm D D 0 315 0 393
71. e P6 BC Heat curve Parallel Shift C The heating curve is set by the parameters Next to these setting done by the installer the end user has the free dom to influence the flow temperature by doing a parallel shift setting In this parameter the margins are set within which the user can increase and decrease the calculated flow temperature relative to the calculated flow tempera ture by the heating curve that is set The actual parallel shift that is set by the user within the bandwidth allowed according to P5AQ Max Heat curve Parallel Shift is continued gt 50 HEATING CURVE additional settings 90 80 4 N 70 P6 BA max flow temp 60 ii P6 BB Heatcurve night shift a lt 50 I P5 AH Warm weather shutdown P2 HA Outdoor sensor hysteresis 2 40 L 30 N P5 AG min flow temp N N 20 4 N N N 10 0 40 30 20 10 0 10 20 30 40 OUTSIDE TEMPERATURE P5 AG Heat curve minimum flow temperature C The set point will never be lower than the flow temperature set in parameter PSAG The minimum temperature is limited even if the calculated set temperature according to the heating curve would be lower P5 AH Summer Outside temperature Central heating C If the outside temperature is higher than set in P5AH the heat demand for heating will be blocked P2 HA Outdoor sensor hysteresis C If the outdoor tempera
72. e it concerns an unconventional system P spioy FS a The water pressure in the system is too high Corrective action Check if the system pressure is too high after re filling Make sure that there is a pressure relief valve and expansion vessel installed in the sys tem according to the applicable standards Check if there is an open connection between the unit and the relief valve plus expansion vessel Be aware that if the unit is installed in the basement of a tall building only the static pres sure of the water column above the units can raise above the maximum allowable limits Make sure that this is not the case The water pressure in the system is too low Check if there is no leakage in the system that causes the pressure to drop Fix any leak age and fill the system Check if there is an external system pump that sucks water through the boiler causing an underpressure bad installation design 97 98 Display message oln 9j9 9 s n r s The supplied power does not comply with the specifications Corrective action Check if the power supply is connected correctly to the unit Check the voltage and frequency Should be Life Neutral Gnd 230Vac 50Hz Make sure there is no signal fail or voltage peaks in the power supply Pispiay messene OGRE BRR Cause The unit is programmed to
73. e to check wiring and connections at both ends that connect to the safety device component that generates the fault LOCK OUT CODES Having a lockout means that the boiler needs a manual reset to start operating again When the boiler is in lockout the backlight of the display is blinking on and off Explanation gt 9199 5 h r s time elapsed after fault message Explanation 1 status of the pump during fault Display message sje n s o r Je rirjo r Pa 9 9 9 5 hn r s Cause Bad wiring connection in the flow sensor circuit Corrective action Check for loose wiring connections in the flow sensor circuit poaren M 9 9 9 s hn r s The water flow is restricted Check functioning of the pump Check open all valves that might restrict the water flow through the unit Check for an external system pump that influences flow through the unit Check if the system resistance exceeds the spare capacity of the unit pump Display message R e tju rin Tje mp oln 949 91 s n r s Reason Maximum return temperature exceeds limit value Systems that pre heats the boiler return temperature too much high Reduce pre heat temperature of external heat source The need for heat in the system suddenly drops causing hot return water to
74. eating circuit for service oper ations Clean water is very important blocked and or polluted heat exchang WATER ers including failures and or damages RETURN i caused by this blocka re not covered FROM WATER FLOW d y gea SYSTEM TO BOILER S by the warranty STRAINER WATER FILTER SYSTEM WITH STRAINER AND DIRT SEPARATOR WATER AIR RETURN BLEED FROM VALVE DIRT SE WATER SYSTEM PARATOR FLOW TO BOILER S VALVE STRAINER WATER FILTER 19 6 10 Water quality The pH value of the water must be within the following limits 7 5 pH 9 5 This pH value is reached with the steady conditions These steady conditions will occur when after filling the heating system pH around 7 with fresh water the water will lose its air because of the air bleeding operation and heating up dead water condi tions Water hardness must be within the following limits 3 5 Clark 50 ppm CaCO lt total hardness lt 10 5 Clark 150 ppm CaCO3 When the water might contain aluminium particles this should be of a maximum of 8 5 ppm If there is any risk of contamination of the water by any kind of debris chemicals in the period after installing a plate heat exchanger should be used to separate the boiler circuit from the heating circuit see drawing below It is advised to prevent the possible air intake and water leakage of the central heating system Fresh oxygenated water might damage the heat exchanger of the boiler and sh
75. eck power supply Voltage must be 230 Vac nom Check for proper electrical grounding of unit Bad ignition transformer Replace the burner control of the unit F8 gt F8 Cause Ignition spark but no flame Corrective action Check if all gas valves in the supply line are completely open Check if there is no air in the gas supply start up new systems Check if the gas valve opens When there is power supply to the gas valve but the valve does not open the gas valve must be replaced Check if the gas valve opens When there is no power supply to the gas valve check the gas valve wiring connections Check if the gas valve settings are correct and adjust if necessary Check if the gas pressure is correct and sufficient Check if the air supply is open not blocked Cause Flame but not enough ionisation to establish the flame Corrective action Check the igniter ignition electrode and replace clean it if necessary Check the state of the ceramic insulator Check the distance between the electrode pin earth pin and burner Check the state of the ignition wire also the ionisation wire and replace it if necessary Check the state of the earth wire connection of the igniter and replace it if necessary Check for proper electrical grounding of unit Check power supply Voltage must be 230 Vac nom Check the state of the sparkplug cap and replace it if necessary rey message Et
76. ected HW temperature of the cascaded boilers Menu B Hot water BIE j DH d s e D i f 3 8 8 Function for the cascaded direct hot water boilers This parameter is the hysteresis of the selected HW temper ature of the cascaded boilers Menu B Hot water j DH i s e D i 4 EE ES 8 20 Function for the indirect hot water supply of the boiler tank This parameter is the hysteresis of the selected HW temper ature of the calorifier tank Menu B Hot water Se ES IER RR eee Function for the indirect hot water supply of the boiler tank This parameter detects an an accelerated hot water de mand when a larger water amount is being used Menu C Cascade cia jMja x CJa s c U n t Ee pest noe a E e Function for the cascading of the boiler s This parameter sets the total amount of cascaded boilers Max 12 boilers Menu C Cascade c 2 Bluljs jJa d d r e s s ERE ER EN AER ES ET ERE ERREUR RE Function for the cascading of the boiler s This parameter determines the address of the boiler for the total cascading control Master 0 Slave 1 1 etc Menu C Cascade c 3 Shee ERROR EE SACRE ERA EDS ERE Function for the cascading of the boiler s
77. eens 39 night shift 49 74 non return valve 104 ff offset 72 outdoor graph 49 outdoor sensor outside tempera ture 13 31 31 49 outdoor temperature control 49 oxygen 20 ff oxygen diffusion proof 82 oxygen tight 82 password 59 plastic piping in the heating sys tem 20 positioning the boiler 15 power supply 9 18 31 82 pressure relief valve 18 printed circuit board 33 pump 18 pump and 3 way valve control 75 putting the boiler out of operation 88 quality of combustion air 26 quality of used water 20 reset 66 roof mounted duct 26 room thermostat on off 73 room thermostat open therm 73 safety guidelines 7 pressure safety valve 82 schornsteinfeger function 48 sensor 13 19 21 31 49 72 75 104 ff sensor values 31 service function 42 set points 45 setting at the maximum load 85 setting at the minimum load 86 setting the maintenance specifica tions 55 setting the outdoor specifications 49 setting the parameters with the display menu 59 setting the time amp date 44 setting the timer programs 46 setting the user lock 58 siphon 16 84 100 starting the boiler 84 stationing the boiler 15 status 39 tank sensor 75 tank thermostat 75 technical data Q boilers 9 temperature display on off 70 timer contact function 74 under floor heating 21 unpacking 13 user instructions 103 user manual 9 14 valve 84 ff 85
78. ellow brown KO K1 K2 purple yellow gree K10 grey K5 orange K3 green K4 CN1 1 CN3 CN not used 23 45 6 7 B8 9 10 2345 6 1 2345 6 1 1107 connection examples 0 3 QU i 8 iD Qll CN10 FAN 12 N T N eA GA SED SED Meno z dung 1 ew e ON 2 asou mi i O 5168 ON j eH ON ON ON euet ON NOC ON MNO 34 9 5 Sensor values and conversion tables SENSOR SENSOR TYPE SENSOR VALUE S1 Internal flow sensor NTC 10K B3977 S2 Internal return sensor NTC 10K B3977 S3 External flow sensor NTC 10K B3977 S4 Calorifier tank sensor NTC 10K B3977 S5 Outdoor sensor NTC 12K B3740 S6 Flue gas sensor NTC 10K B3977 Conversion table temperature vs resistance for all sensors with value NTC 10k B3977 all sensors except the outdoor sensor CC Q C Q C Q C Q 20 96360 8059 1 10 298 ssor 9 2 sss so so om mo m 10 10 s 1 145 Conversion table temperature vs resistance for the outdoor sensor with value NTC 12k B3740 CC Q C Q _ 55 86130 C ca
79. er s address will be shown first in the row of numbers Example 1 345 012 There are six boilers present and nr 3 has priority Example 2 3 4 1 2 There six boilers present and nr 3 has priority Boiler 0 is heating up indirect DHW tank Boiler 5 is present but in a lock out Status of the general blocking us Open or 5 iS i p h lo ln p rjelsis c t o s eld Status of the siphon pressure switch Open or Closed tja c t O ple n Status of the non return valve contact Open or Closed 41 10 5 Service function The following graphs describe how to use the service function nelait S T A N p B Y 2 3111 Press SERVICE and hold for 3 seconds The burner will start and show the display below Operating screen iH E A T r N G s e r v i c e 2 6 gt gt gt Jo oj oj C 6 0 0 HEATING It is a boiler for heating Service It is operating in service mode 2696 The burner is firing at 2696 90 0 C Max allowable water temp during service 60 0 C Actual measured water temp when P5BJ active Press SERVICE to exit The unit will go to the operating screen Press 3 s ON OFF to exit The unit will be switched off By using the A amp V buttons the burner firing rate percen
80. erature based on the heating curve settings an outdoor sensor must be connected and one must set this parameter at 1 When having cascaded boilers the outdoor sensor must be connected and this parameter must be set at 1 on the master boiler only The heating curve that is set on the master boiler is used for controlling the flow temperature of the whole cascade 0 No outdoor temperature sensor connected 1 Outdoor temperature sensor connected 49 OUTDOOR GRAPH see also next page HEATING CURVE main settings 90 P5 AD Flow temp at outside temp low 80 N P6 BC Parallel shift 70 4 60 4 5 50 40 30 L 20 10 P5 AF Flow temp at outside temp high 0 40 30 20 10 0 10 20 30 40 OUTSIDE TEMPERATURE P5 AC P5 AE outside temp low outside temp high P5 AC Heat curve minimum outside temperature C This sets the minimum outside temperature at which one wants the maximum flow temperature that is set P5 AD Heat curve flow temperature at minimum C This sets the desired maximum flow temperature at the set minimum outside temperature P5 AE Heat curve maximum outside temperature C This sets the maximum outside temperature at which one wants the minimum flow temperature that is set P5 AF Heat curve flow temperature at maximum C This sets the desired minimum flow temperature at the set maximum outside temperatur
81. fec tuated by leaving standby mode Properties of standby mode Keys are active and the menu is accessible e Burner does NOT respond to an external heat demand e All control functions are active pumps fans and cascade are operational recirculation and frost protec tion are working How to programme the boiler e First disconnect or shut down the room thermostat and or other external controllers from the boiler The CH pump and fan will stop after a short delay time e Switch the boiler in standby mode by pressing ON OFF for three seconds e next display screen should appear Display message LE Be TIE gt gt 4J je ej1 2 3 e Program the boiler at the control panel see the following sections e Terminate programming mode by pressing MENU or ENTER and NO 4 or YES gt Reactivate the boiler by pressing ON OFF for three seconds again 10 8 Setting the time amp date The following graphs describe how to program the time and date of the unit Operating screen iH EJA T I N e b o i t e r gt gt gt 4 2 3 4 4 2 3 4 Press MENU Main menu screen Mleln u ses The display shows CLOCK press ENTER Setting Time and Date 5 oje fsfs isjojrjejs r 2 o 1 0 jTiue The day is now blinking selected and can be changed Use A amp
82. ff 100 ventilate 7 14 venting 7 14 20 20 100 wall mounted duct 15 22 water pressure 21 water pressure switch 31 82 water quality 20 water side connections 15 water treatment 21 weather dependent control 49 73 115 Strebel Ltd 1f Albany Park Industrial Estate Frimley Road Camberley Surrey GU16 7PB 01276 685422 01276 685405 info strebel co uk www strebel co uk d a STREBEL HEATING TECHNOLOGY Further information on our complete product range is available from our website CAST IRON CONDENSING STEEL SHELL WATER HEATERS RENEWABLES FLUES ACCESSORIES RADIATORS
83. fication to suit particular local site conditions It is the law that all gas appliances and fittings are installed by a competent person such as a Gas Safe regis tered installer and in accordance with The Gas Safety installation and Use Regulations The relevant British standards for installation codes of practice or rules in force and in accordance with the Manu factures instructions The installation must be carried out in accordance with the following regulations plus relevant codes amp standards Due consideration must be given to current Health amp Safety Legislation while this product is being in stalled Key Approved Documents to the Building Regulations the region of the United Kingdom that this prod uct is being installed The Local Building Regulations and Local water by laws the gas services area and the Local Authority recommendations The appropriate British amp European Standards for the type of installation and fuel used including but not exclusively the following standards o BS 5440 Parts 2 Flues and Ventilation o BS 6644 Installation of gas fired hot water boilers of rated inputs between 70kW amp 1 8MW The clean air act as defined by the local authority The appropriate documents as produced by the Institution of Gas Engineers and Managers Documents IGEM for the type of installation and fuel used including but not exclusively the following documents IGE UP1 IGE
84. g a 0 10 Volt signal Connections 15 16 0 No external control 1 Control based on temperature setting 2 Control based on power setting D2 jo 1 0Mji n iTim p Dope Function for the external control of the boiler by using a 0 10 Volt signal Connections 15 16 Control based on temperature setting 1 The minimum desired CH water temperature when supplying a 1 4 Volt signal D3 Function for setting the location height above sea level of the boiler NOTICE dimensions in English feet One unit 100 ft Use this function only in consultation with the supplier manu facturer Menu D General Dja MMja xjC ojo i T iim Fe Function for setting the maximum overrun time of the fan max imum 10 minutes 0 Switch off Menu D General 5 RRR EE ERE RES ESL LESER E Function to show the measured temperature of the boiler at the display Menu D General Die D H w gt ES e s E E ERES SHE Function to set up the CH and HW boiler options 0 CH only direct 1 CH HW function indirect 2 HW only direct Menu D General E pos E pur ades
85. g screen T Press MENU IFaulitihjiisit 2 1 1 0 4 2 0 1 0 4 2 2 2 3 A blinking in turn V Isjilpih o in S w i t elh Sjv 9 9 9 CjUJM 9 9 9 JR 9 9 9 9 5 Press 4 amp gt to browse through the last 10 faults Press MENU or ENTER to exit The unit will return to the operating screen The fault menu shows the last 10 faults For each fault the display blinks between the two screens shown above The top line of the top screen shows the fault number and the bottom line of the top screen shows the date day and time the fault occurred On the top line of the bottom screen the fault type is displayed The bottom line shows the following SV The total amount of this fault that has occurred after the last time that the service history was erased after service was done CUM The total amount of this fault The total amount cannot be erased after service this shows the fault history of the boil er electronics since the start of operation R Shows the elapsed time in hrs between the moment the fault occurred and the moment it was reset 10 14 Setting the maintenance specifications The following graphs describe how to check and program the maintenance settings The standard factory setting for this function is OFF MAINTENANCE SETTINGS The unit can be programmed in such a way that an automatic maintenance message is dis
86. g to B23 B23P B33 the boiler air inlet is open and has not been connected so only the flue gas discharge is connected and the boiler gets its combustion air directly from the boiler room In this case The boiler room must be provided with the necessary air inlet opening s N These air inlet opening s must remain open at all times and may not be reduced or closed 30 9 ELECTRICAL INSTALLATION 9 1 General All the wiring is connected by means of screw terminals The connections are placed on top of the display panel and can be accessed by removing the boiler front door and the connector protection cover control is applied without written approval of Strebel Ltd the complete warranty on the S CB Px 120 boiler i The boiler pump must be controlled by the S CB Px 120 boiler control If for any reason an external pump and all supplied parts will become invalid e For operation the boiler needs a power supply of 230 Vac 50Hz boiler connections are not life neutral sensitive the boiler is not phase sensitive e The wiring for the connections can be entered at the bottom of the boiler through the cable glands e NOTICE Before starting to work on the boiler it must be switched off and the power supply to the boiler must be disconnected e Electrical wiring should be installed according to all applicable standards and regulations e Working on the boiler should only be done by a qualified service engineer that is sk
87. ging level and hanging slightly backwards The boiler should not lean forward in the mounted position 3 Lock boiler with locking plate and two bolts 1 Attach mounting bracket to wall with inclined side facing upwards 2 Suspend boiler with suspension bracket on mounting bracket 4 Level boiler using adjusting bolts Boiler suspension Detail boiler suspension 15 6 BOILER CONNECTIONS 6 1 General 1 Flow CH 2 Return CH 3 Siphon cleaning point 4 Condensate drain 5 Gas 6 1 1 MOUNTING When mounting the connections always make sure that no extra tension forces and or tor ques are applied to the connecting pipes and or the boiler and the boiler suspension Keep the connections fixed in place as shown in the picture by using two wrenches 6 1 2 GAS CONNECTION Always install a manual shutter valve in the gas supply line directly underneath the boiler NOTICE This valve is NOT delivered with the boiler 16 6 2 Condensate drain connection The condensate drain has a 19mm flexible discharge hose The siphon must always be filled with water As a safety measure the siphon has been provided with a floating ball which closes the outlet in case of water ab sence preventing large flue gas leakage Use only condensate resistant materials for the external condensate drainage system Blockage of this drain might damage the boiler The drain connection is correct when the c
88. h water is bringing fresh oxy gen into the system like installing a water meter to measure and evaluate the total water volume that is added to the system Some form of logging should take place so that continuously filling of the system with large amounts of oxygen rich fresh water indicating leakage is detected in time 20 6 14 Water pressure First and for all the installation should be designed and built conform all applicable regulations and standards including the right safety valves IMPORTANT Always keep the pressure in the boiler lower than the value at which its safety valve opens Sensor A water pressure sensor has been built into the boiler With this sensor the minimum water pressure in the boiler is 0 8 bar and the maximum pressure is up to 4 0 bar sensor values The normal water pressure is supposed to be between 1 5 and 2 0 bar The pressure sensor will stop the boiler from firing when the water pressure drops below 0 8 bar and start the boiler firing again when the water pressure reaches above the 1 0 bar These values can be changed in the boiler control settings Higher pressure systems e g in high buildings If pressures higher than 4 0 bar occur in the heating system the best solution is to separate the system from the boiler by means of a plate heat exchanger Now the boiler pressure can still be under 4 0 bar and the boiler con trol remains as described above Without plate heat exchanger above 4 0 b
89. he changes made The time and day will start blinking for a few seconds After this the display returns to its operating screen 0 2 1 ERE 0 3 jHjCO m i niE 0 4 jHjC majx OjuTimp 0 5 jHjC majxiF iTimp 8 ole P5 AA P5 AC P5 AD P5 AE P5 AF P5 AG aha DS ERE FS Ed EORR DERE 0 7 SjujmSjh D wnOu ES EE CHR E ER ER E 80 0 8 jHjC maxiF iiLiim Safe EG EE TITULI DS ERES LR ojo jHjC n gihntish fit Sasa See US CE loja jHjC pjajrja sh ft ERR ERR RR P5 AH P6 BA P6 BB P6 BC P5 AR 52 10 12 Checking the operating history The following graphs describe how to check the operating history of the boiler Operating screen IHiE JA T I N G b o i 4 gt gt gt 1 2 3 4 1 2 3 4 Press MENU Select Operate using 4 amp gt and press ENTER Mjajiln
90. he operating Screen Press 4 for next SCREEN Copy programmed day for CH fjriojm C H jtioj j Press gt to switch between Copy from and Copy to The blinking day is selected and can be changed Press A amp to change the selected blinking value Press ENTER for confirmation screen when all settings are done Confirmation screen Confirmation screen Alce y oju lt Cla n c e gt jClojnifji rim Press 4 to cancel the changes made unit will reset Press gt to confirm the changes The two days will blink for a moment Press MENU to exit The boiler will reset and go to the operating Screen Press 4 for next SCREEN gt gt gt Continue on next page HOT WATER program lt lt 47 HOT WATER PROGRAM 48 gt gt gt From previous page with HEATING part lt lt lt R R Setting DHW program times 1 016 10101 2 3 0 0 Press gt to browse through the values that can be set at the bottom line The blinking value can be changed Press A amp W to change the selected blinking value Press ENTER for confirmation screen when all settings are done j Is cia nijcje t gt Clo nifiiirim Press 4 to cancel the changes made unit will
91. his parameter is the proportional range of the selected CH supply tempera ture 4 s c D i f 1 3 FESTER ER SERRE d Select the CH supply temperature control This parameter is the hysteresis of the selected CH supply temperature ALS HIE 8 LES ERR ER Select the CH supply temperature control This parameter is the integration time of the selected CH supply temperature Select the cascaded boilers supply temperature control This parameter is the offset of the selected CH supply tem perature of EACH boiler of the total cascade Menu A Heating ERSTE E Sie ES SISTI ESSEN ESSI eet e em E m E Select the cascaded boilers supply temperature control This parameter is the proportional range of the selected CH supply temperature of EACH boiler of the total cascade and of the external cascade sensor Menu A Heating EB CAI E Select the cascaded boilers supply temperature control This parameter is the integration time of the selected CH sup ply temperature of EACH boiler of the total cascade and of the external cascade sensor Menu A Heating Alo Tii mje riCjoin t
92. iler because of an extraordinary situation The boiler will continue to operate after stabilisation of this situation The display is not blinking but is lightened up during the blocking period The boiler is blocking an action because of an extraordinary situation This action will be continued after stabilisa tion of this situation Display message ES FU Reason The controller received a new heat demand too quick after the last ended demand Reason Flue gas temperature has exceeded the limit as set in the parameters Reason Flow temperature has exceeded the blocking temperature as set in the parameters Reason Flow temperature has exceeded the blocking temperature which is set in the Reason Return temperature has exceeded the blocking temperature which is set in the pa rameters but the return temperature has not exceeded the lock out value Eu ECCE DE 8 TEES ESTEE EUER ERE ieee Reason Temperature difference T2 T1 has exceeded the blocking value as set in the parame ters Display message Display message Display message Display message Display message Reason The boiler starts its deairation function and after will return to normal operation This function can be activated by parameter P4AJ
93. illed in working on electri cal installations and according to all applicable standards and regulations 9 2 Electrical connections 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 OUTDOOR EXTERNAL CALORIFIER GENERAL EXTERNAL ON OFF STAT LOCK OUT SENSOR FLOW SENSOR BLOCKING WPS OR SENSOR OR OPEN THERM 0 10 CASCADE THERMOSTAT HEATING VDC CONNECTION CIRCUIT N O ie TER EM p ES Cg BURNER L ON L1 L2 L x N BURNING DIVERTOR VALVE FIXED POWER MAIN POWER CH SYSTEM CALORIFIER SUPPLY FOR SUPPLY TO DNUS BYCALORIFIER BOILER PUMP P2 230V 50Hz 230V 50Hz An extensive explanation of the connections and their functions is given in the table in the next section 9 3 Functions of the connections 1 2 OUTDOOR SENSOR When an outside temperature sensor is connected the boiler will control the flow water temperature by using a calculated value which is relative to the outside temperature PARAMETER No parameter settings needed 3 4 EXTERNAL FLOW SENSOR When a low loss header is used this external flow sensor measures the flow temperature at the sys tem side The sensor must be mounted on the supply pipe at the system side just behind the low loss header NOTICE The sensor is required when several boilers are cascaded with the internal cascade manager PARAMETER No parameter settings needed 5 6 CALORIFIER SENSOR or THERMOSTAT When an indirect h
94. information should be reported to the owner end user of the installation Also the owner end user should be advised how to fix these defects and these defects should be report ed in the service report log file of the boiler During service and maintenance the gas supply air flue gas and condensate connections are discon nected checked and replaced Make sure that all these components are mounted correctly before com missioning the boiler again Reassembling the burner door correctly onto the heat exchanger tighten in given order Before mounting the burner door make sure that its gas kets and insulation are in excellent shape If any signs of damage or ageing are present these parts must be replaced torque value 8 Nm The burner door unit must be reassembled to the heat exchanger just in the reverse way of its disassembling as described earlier in this section on page 100 Carry out the final mounting of the burner door by follow ing the next steps Place the burner door with its holes over the six threa ded studs Careful When handling too rough or misplacing the holes over the threaded studs the burner door insula tion and or gaskets can be damaged Assure yourself that the door is well positioned with res pect to the threaded studs before pushing it onto the exchanger Now keep the burner door firmly in place by pushing the gas air nose with one hand at the middle at point A o Then turn
95. ing graph for the relation between the temperature and the control signal AT i ud 1004 90 P6BA max temperature set point e g 90 C 80 70 60 50 40 30 temperature setting C 20 P5AI min temperature set point e g 20 C default 104 PS SIRE 0 1 2 3 4 5 6 7 8 9 10 11 12 0 10 Vdc control signal 73 11 2 6 0 10 VDC REMOTE BURNER INPUT CONTROL The burner input is controlled by connecting an external 0 10 Vdc signal to the boiler connections 13 14 5 Analogue input Config 0O off 1 temp 2 power display D1 This parameter must be set at 2 so the supplied 0 10V dc signal will control the burner input The standard facto ry setting is 1 temperature set point control Possible settings are 0 10 V control off 0 10 V temperature set point control active 0 10 V burner input control active N gt O Hou ot See also the following graph for the relation between the burner input and the control signal P2GB off P2GAon P2GC max 17 4 100 Max burner input 90 80 70 60 50 40 20 Min burner input 96 anzi fixed value e g 2596 10 ZR RONDE EE E RR 0 1 2 3 4 5 6 7 8 9 10 11 12 0 10 Vdc control signal p burner input 96 11 2 7 TIMER CONTACT FUNCTION This function can be activated when using an external night reduction timer for heating This timer c
96. ions for butane propane kit application The air restrictor is a plastic cap with a slit in it To apply it follow the next steps see picture below Disassemble the complete burner door unit as described in section 17 2 on page 100 Loosen the three screws 1 that connect the venturi to the fan Remove the plastic ring 2 from the fan and replace it by the O ring 3 supplied with the butane propane air restrictor kit NOTICE It is very important that the plastic ring 2 is discarded to ensure that the venturi is mounted air tight onto the fan Put the air restrictor itself 4 completely over the venturi inlet opening and secure it with the supplied clamp 5 NOTICE Make sure that the air restrictor is placed correctly it should have the slit horizontal when the other components have the orientation as in the picture Reassemble both the burner door unit on the heat exchanger and the venturi with air restrictor on the fan Picture application of the air restrictor kit for butane propane venturi screws 88 2 plastic ring 3 O ring 4 airrestrictor 5 clamp 15 PUTTING THE BOILER OUT OF OPERATION It is recommended to have the boiler operational all year round to prevent any frost damage during the winter and or rotating parts getting jammed during other times of the year built in boiler safety features 15 1 Out of operation on off function To be used when the appli
97. irection of the boiler about five centimetre for every linear meter When not installed accordingly it may result in condensation building up in the flue gas tube which may cause component failure e Itis preferable to use roof terminals Because of the high capacity using wall terminals on the S CB Px 120 can give unpleasant large flue gas clouds When installed correctly roof terminals in general give a better flue gas dilution with the surrounding air and a good transport away from the surroundings and the air inlet This is valid for concentric roof terminals and for a separate air inlet nearby a separate flue gas outlet e When using a wall terminal there is a risk of ice building up on surrounding parts structures because the condensate may freeze This risk should be taken into account during the design phase of the heating instal lation Note The flue gas material should be fit for purpose and comply with the applicable European standards It must be able to handle the condensate forming and transport overpressure and must have a minimum temperature class of T120 8 2 Air supply When an air supply duct is connected from the outside of the building to the boiler the boiler will operate as a room independent boiler closed boiler The air supply duct can be made of e PVC PP e Thin walled aluminium e Stainless steel 8 2 1 COMBUSTION AIR QUALITY Combustion air must be free of contaminants For example chlorine ammoni
98. is an unlikely situation while all the safeties for checking the water presence didn t detect anything Only a lot of air in the system unit under pressure can cause the water pressure switch to switch while no water is present Also the water leak detection did not react Bleed all air from the unit so the heat from combustion can be transferred to the water and won t leave through the flue system Heat exchanger failure Corrective action This is an unlikely situation but when there is severe damage to the heat exchanger the combustion product will not be able to transfer all heat to the system water The heat that is not transferred will convert to an increased flue gas temperature A nit ije y e rie Esse es aded The controller received a new heat demand too fast after the last ended demand Display message Reason Immediately opening and closing of the external thermostat Corrective action Controlled water flow cools down too quickly after loss of heat demand Controlled water flow heats up too quickly after start of heat demand Immediately opening and closing of the external thermostat Check switching differential of the ON OFF thermostat Controller settings need to be changed Be aware that the standard settings work fine for all common systems When anti cycling is active because of immediate heating or cool ing of the controlled water flow temperatur
99. l flow temperature to the tank coil s in case of a calorifier indirect hot water demand P5CL Low flow temperature time DHW display B4 The programmed period for changing the set point of the water flow temperature from low to high The standard factory setting for this function is OFF 76 11 3 5 HEATING AND HOT WATER SWITCHING TIME This function can only be used for an indirect programmed boiler parameter P4 AA 1 In case there is a heating demand and the unit is operating for this heating demand also a hot water demand can be activated A hot water demand always has priority this means that the unit will switch to hot water operation When the hot water demand remains for a longer period there will be no heat supply for to the central heating system during this period Not supplying any heat for to the central heating system might cause undesirable tem perature fluctuations The following parameters can be used to program the preferred settings P5CL Low flow temperature time DHW display B4 The period during which the set point of the water flow temperature to the heating coil s of the calorifier will Switch from low to high P5 CF Maxruntime DHW during CH demand The programmed period for the boiler to operate for DHW demand in case of a CH demand After this period the boiler will switch to operate for CH demand even when there is still a DHW demand 5 Maxruntime CH during DHW demand The programmed perio
100. length for concentric systems is the total sum of the concentric pipe straight lengths 2 100 150 mm rounded to integer meters Results moou 8 7 2 SPECIFIC RESISTANCE CALCULATION EXAMPLE OF CONFIGURATION B WITH GIVEN LENGTHS gums m 120 cea H UU Maximum length air inlet flue gas outlet 22 m Maximum length air inlet flue gas outlet 13 m Maximum length flue gas outlet 18 m Maximum length concentric pipes 3 m Maximum length concentric pipes 10 All examples separate pipes 100 mm and concentric pipes 2 100 150 mm Total resistance is 151 Pa lt 160 Pa This system therefore fulfils the requirements Boiler type S CB Px 120 gas air 100 mm number R R total Straight length total 6 6 5 39 8 Bend 90 2 6 5 13 2 Conc roof terminal 100 150 1 45 45 Adaptor conc TP 100 150 1 22 22 R gas 119 Straight length total 6 4 24 5 Bend 90 2 4 8 R air supply 32 total 151 All pipe diameters 100 mm twin pipe or 100 150 mm concentric All lengths in m R resistance All resistances in Pa 29 8 7 3 OPEN VERSION B23 B23P B33 Example C Sy Air inlet 1 Ue E Vented area In case of an open air supply accordin
101. ll valves that might restrict the water flow through the unit Check for an external system pump that influences the flow through the unit Check if the system resistance exceeds the spare capacity of the unit pump Return temperature has exceeded the blocking temperature but it has not exceeded the lock out value Display message Cause Systems that pre heats the boiler return temperature too much high Corrective action Reduce pre heat temperature of external heat source Cause The need for heat in the system suddenly drops causing hot return water to the boiler Corrective action Dampen external heating system control to prevent sudden boiler temperature rise eme t HEIL Cause Heat exchanger polluted and not able to transfer enough heat to the system water Corrective action Check and clean heat exchanger Cause Bad flue gas sensor or sensor connection partly shorted Corrective action The sensor is of the type NTC This means when the temperature rises its resistance decreases A partly shorted sensor will drop its resistance and therefore measure a raise in temperature when actually there is none Check for moist in the sensor connections or replace the sensor Flue temp high message continues p t o gt Continuation of Flue temp high message There is no water in the unit while firing Corrective action This
102. master 1 PARAMETERS PARAMETERS PARAMETERS P5DF 0 P5DF 0 P5DF 0 P5DA 1 P5DA 2 P5DA 3 slave 1 Tr 771 slave 2 poc slave 3 CASCADE CONNECTION Now for every single boiler of the cascade the following two parameters must be selected and programmed ac cording to the above drawing When the correct parameter is set this must be confirmed at the confirmation screen After activation the value Master C5P5 DF1 2 5 0 Slave 1 C5P5 DFO C2P5 DA 1 Slave 2 C5P5 DFO C2P5DA2 And so on Menu C Cascade Cascade 7 5 Sjiij Mia ppp esie PR n Function for the cascading of the boiler s This parameter sets the function of the boiler at a cascade alignment 0 Single Slave unit 1 Master unit Menu C Cascade Menu Cascade o c 2 EE n c ET Function for the cascading of the boiler s This parameter determines the address of the boiler for the total cascading control Master 0 Slave1 1 etc will blink for a few seconds while the parameter is programmed into the boiler 80 When cascade connection is programmed correctly the boiler display will show the following Explanation Cascade communication indicator NO CASCADE COMMUNICATION no 1 Always showing the fixed gt gt gt
103. me City Country ress V P Display shows for three seconds Heater type Time date and day example Z FG 550 13 51 US or EU 06 01 2010 Wed After this message the display shows for three seconds Software version and Cascade designation example Firmware Mk 00197 MONITOR screens Address 0 One can toggle through the measured val ues and status of the heater Pressing ON OFF RESET ENTER briefly will cause the display to go back to the base menu When no button has been pressed for three minutes the display will automatically go to the BASE DISPLAY This period can be set by a parameter These three messages will also show when Heater is connected to the power When heater is turned ON When heater is turned OFF sequence The messages will show from TOP to BOTTOM each for three seconds gt CONFIRMATION CHANGE When changes have been made in one of the nine menus below the user presses ENTER to confirm these changes To prevent customers making changes by accident the following happens when changes are made Step 1 The user presses ENTER to confirm the change made By pressing 4 gt can toggle though the available menus or MENU to exit the menu without changes HINT First pro gramme all changes planned then only after that press ENTER Step 2 The display asks the user to be s
104. mperature in the operation display 0 not visible 1 visible 11 1 4 WATER PRESSURE P4 AD pressure 0 off 1 sensor 2 switch display D7 When the water pressure exceeds 4 bar a pressure switch must be used instead of the sensor suitable till 4 bar With the switch pressure can go up to 6 bar In this case remove the pressure sensor and replace it by the pres sure switch Now set the parameter at the control panel by changing D7 config from 1 into 2 11 1 5 GAS TYPE SELECTION Settings for gas types natural gas propane or butane propane mixture B P P4 BD Gas type 0 standard 1 propane 2 B P display D8 This parameter is set 0 for the common used gas types such as natural gas G20 or G25 By setting this parameter 1 for propane fan speed is reduced Set this parameter 2 for B P standard gas e g natural gas propane B P By each setting the relevant Soft start settings are automatically adjusted depending on its main setting P4BE see next section 11 1 6 Remark For the S CB Px 120 it is not necessary to use P4BD because the air restrictor kit for propane butane must be used 70 In case of gas conversion paste the correspond PROPANE ing sticker at the appropriate position in the boiler 231 Blocs PABD 1 and mark the square for the used gas type Also PROPAAN mark the square indicating that the correct value BUTANE PROPANE has been set for parameter PABD G30 G31 B P BUTAN PROPAN P4B
105. ncel the changes made unit will reset Press gt to confirm the changes The value set in the screen when pressing enter will be shown for a few seconds After this the display returns to the normal operating screen IMeJa t i n g ERES The flow temperature set point that will be active during the programmed CH periods N ji g h t 5 8 The reduction of the normal day time set point This reduction is used outside the programmed CH periods Parameter P6 BB Heating paratei shift Plate t ERR E GO 80 Setting the parallel shift of the heating curve related to the outdoor temperature control parameter P6 BC 46 10 10 DHW set point normal day time parameter P4 AA 1 2 ESI EE ESSE SEES This is the water temperature set point that is active during the programmed DHW periods parameter P4 AA 1 2 DHW set point reduction parameter P4 AA 1 2 iD H W Rjediu cle EARS EE The reduction of the DHW set point related to normal day time set point This reduction is used outside the pro grammed DHW periods parameter P4 AA 1 2 Setting the timer programs Three different programs can be set with
106. nd operates at service mode at 27 minimum Use the V button to decrease the actual load of the service percentage to the minimum message HELA T sete i ete EIE gt gt gt 1 2 4 C 1 2 3 4 C Reason Boiler is activated and operates at service mode at 27 minimum When the boiler operates at minimum load measure the percentage at the flue gas outlet of the boiler This value should match the values given in the table above When needed adjust the gas valve setting by the adjust ing screw 1 See the drawing above Decrease CO percentage Turn screw 1 left counter clockwise Increase CO percentage co24 1 Turn screw 1 right clockwise See next page for additional measurements 86 Additional measurement at minimum load In the table a percentage is specified at which the gas valve must be set with the boiler operating at mini mum load This setting of the gas valve is in general a good procedure to get a good gas air ratio But to ensure a good setting at minimum load we also advice to check the pressure at measuring point 4 on the gas valve while the unit is firing at minimum load at the specified setting so after setting screw 1 To do this remove the screw on measuring point 4 from the gas valve and connect a pressure measuring device manometer to it When the has been set to the specified value at minimum loa
107. ndirectly heat up the water in the calorifier tank The parameters for this function can be configured for both low and high calorifier operation This function operates as follows In case of a heat demand the boiler supplies water to the heat exchanger of the calorifier according to the flow temperature set in parameter P5 CB When the heat demand remains for the period set in parameter P5 CL the flow temperature set point will change to a higher temperature which is set in parameter P5 CK This situation continues until the heat demand ends r Start heat demand calorifier du P5CB P5CK P5CL Water temperature to calorifier heat exchanger The reason for this function is that the boiler by supplying a lower flow temperature to the heat exchanger of the calorifier can stay in its condensing mode if the temperature is low enough and thus operate at a higher effi ciency level When it takes too long gt P5 CL to heat up the tank with this low temperature mode the flow tem perature set point will change to a higher setting to make sure that the hot water set point is reached 5 Flow temperature DHW tank low display B2 The low level flow temperature to the tank coil s in case of a calorifier indirect hot water demand This two staged function is added to keep the boiler in the condensing mode as long as possible P5CK Flow temperature DHW tank high display B3 The high leve
108. ner is on full load delta T 20 C and when the burner modulates down the pump also modulates down keeping delta T 20 C provided it is still in range of the lowest limit of the pump 18 The delta T monitoring parameters have been set so that a malfunctioning of the pump or an extreme resistance in the hydraulic system will be detected by the burner controller When the limits of these parameters are exceed ed the display message dT Block will be displayed This message will disappear when the delta T is within limits again if not the boiler will go into a lock out after 45 seconds and the display will blink with the message Flow Return dTfault see also 8 16 1 page 90 ff ON OFF pump If an on off pump is used it must be connected to the P3 control 23 24 25 When this pump has multiple speed settings make sure it is set at the highest setting and do not change this setting The boiler has an internal pump switch that has a programmable delay before it turns off also for hot water supply this delay is programmable The pump starts running in case of a heat demand When heat demand stops the pump will continue to run for a programmed period and after that it will stop The pump and when installed the three way valve or hot water pump for the calorifier can be activated every 24 hours for a programmable period This 24 hour cycle starts as Soon as the power supply of the boiler is connected 6 8 Frost protection The
109. nplug boiler e Close the gas valve to block gas supply to the boiler Customer comments Comments and remarks from the customer should be analysed and used to find possible causes for any occurring problems and complaints 100 Service history The operational and fault history total amount and since the last service of the boiler can be retrieved with the help of a computer correct software and an interface cable This information can be used to specify the mainte nance and service proceedings in relation to the boiler parts Water leakage The water pressure of the heating installation should be more than 1 0 bar and at a maximum of 4 0 bar When the water pressure drops below the minimum occasionally there might be a water leak Check the boiler and the complete heating installation for any water leakages and have these repaired Flue gas amp air supply The flue gas and air supply pipes must be checked for gas tightness Also check if the mounting of these pipes is correct safe and not damaged Check the top panel of the boiler housing for signs of water leakage and traces of water coming from the air supply pipe the air vent or any condensate coming from the flue gas pipes The flue gas outlet has been provided with a flexible adaptive restriction which should be checked an N nually If necessary remove contamination or other possible failure causes If there is any doubt of the good state or correct functioning of the a
110. nsibly of the end user to have the unit maintained every twelve months 57 10 15 Setting the user lock The following graphs describe how to activate the user lock of the display The standard factory setting for this function is OFF The USER LOCK menu In this menu the boiler can be locked for end users 0 UNLOCKED 1 LOCKED When the boiler is unlocked the user can enter the MENU by pressing the menu button and all screens will show up When the boiler is locked the user has to push the MENU button together with the V button for 5 s to access all menu screens This function is to prevent accidental changes NOTICE The PARAMETER screen is always accessible IHIEJA T NIG b oli t e r Jo f f gt 2j2 1 2 3 4 C 1 2 3 4 C Press MENU Select User lock using 4 amp gt and press ENTER User lock screen The 0 is now blinking selected and can be changed Use A amp V to change the value 0 User lock function OFF 1 User lock function ON Press ENTER for the confirmation screen after the selection has been made vieju lt jCjajnjeje gt JCjo njfjijr m Press lt 4 to cancel the changes the unit will reset and the display returns to the operating screen Press P to confirm the changes The changed value will be blinking for a few seconds After this the display returns to the
111. nt and using an ON OFF control can be connected to the boiler connec tions 13 14 Changing the flow temperature set point and activation of a timer program can be done by this room thermostat or by programming the boiler settings See chapter 10 10 11 2 3 THERMOSTAT OPEN THERM An RC OpenTherm controller can be connected to the boiler for temperature reading s and remote programming connections 11 12 11 2 4 OUTSIDE TEMPERATURE RELATED FLOW CONTROL The flow temperature can be calculated by using the measured outside temperature for controlling the boiler See for detailed information 10 11 11 2 5 0 10 VDC REMOTE FLOW TEMPERATURE SET POINT The flow temperature is controlled by connecting an external 0 10 Vdc signal to the boiler connections 13 14 5 Analogue input Config 0O off 1 temp 2 power display D1 This parameter must be set at 1 so the supplied 0 10V dc signal will control the temperature set point Possible settings are 0 0 10V control off 1 0 10V temperature set point control active 2 0 10V burner input control active P5 Al Minimum Temperature 0 10V input display D2 The standard starting temperature of the heat demand when the minimum voltage signal is sent to the boiler The factory settings for all heating applications are working fine and it is therefore advised not to change these set tings If changes are needed always consult the manufacturer for advice See also the follow
112. ocked the user can enter the MENU by pressing the menu button and all submenus will show When locked the user has to push the MENU and simultaneously press W for six seconds to get ac cess to all submenus This is to prevent accidental changes NOTE The parameters sub menu can always be accessed PARAMETERS menu In this menu one can change param eters The possible access depends on the password that is Enter PW Level 1 Enter PW Level 2 three second message three second message confirming access confirming access LEVEL 1 LEVEL 2 38 used 10 3 Display during operation During normal operation the text in the display shows the status of the boiler In the following graphs the several displays during normal operation are explained Display at HEATING DEMAND Heat demand type _ Actualstatus _ _ _ __ M EA T I N G N o gt gt gt 1 2 3 4 4 2 3 4 cascade temp set point communica measured temp control sens showing the measured temp Can be turned off by P5 tor When heat is needed for the calorifier the text HEATING chang es into HOTWATR When there is no heat demand it always shows heating Display at HOT WATER DEMAND Heat demand type Actual status Actual status T WJ A T R N o gt gt gt 1 1 2 3 4 1 2 3 4
113. ojn 949 91 s n r s gas supply pressure Corrective action Be aware that the specified gas pressure must be met during all operation conditions Check if all gas valves in the supply line are completely open Check if the dirt filters mesh in the gas valve inlet is clean Check if the external dirt filter in the gas supply line is not blocked Check if an external gas pressure regulator is selected installed correctly Check the gas pressure that is supplied to the building gt call the supplier if necessary Bad electrode electrode wiring connection bad ionisation signal Corrective action Check ionisation signal Check the igniter ignition electrode and replace clean it if necessary Check the state of the ceramic insulator Check the distance between the electrode pin earth pin and burner Check the state of the ignition wire is also ionisation wire and replace if necessary Check the state of the igniter earth wire connection and replace it if necessary Check for proper electrical grounding of unit 93 Cause Bad flue gas and or air supply system Check if the design of the flue gas and air supply system complies with the max com bined resistance as specified Check if the flue gas and air supply system is installed according a good installation prac tice by a skilled installer Check all seals in the flue gas and air supply system Cause External factors
114. om previous page with HOT WATER part Setting legionella program day and time e J Press gt to browse through the values that can be set at the bottom line The blinking value can be changed Press A amp to change the selected blinking value Press ENTER for confirmation screen when all settings are done ylou siurrie lt 1 gt Press 4 to cancel the changes made unit will reset Press gt to confirm the changes The last alternation will be blinking for a few seconds and return to base menu Press MENU to exit The boiler will reset and go to the operating screen Press 4 for next SCREEN 10 11 Setting the outdoor specifications PARAMETERS FOR SETTING THE OUTDOOR GRAPH When using this function the flow temperature is calculated based on the measured outdoor temperature The relation between the outdoor temperature and the flow temperature can be programmed with the following pa rameters This setting creates the so called heating curve The boiler will recognise an outdoor sensor when it is connected When the sensor is detected the boiler controller will control the flow temperature based on the heating curve that is programmed P5 AA Outside sensor present config 1 on 0 off i When one wants to control the flow temp
115. ondensate can be seen flowing away e g using a funnel Any damage that might occur when the drain is not installed correctly is not covered by the war ranty There should be an open connection of the condensate hose into the sewage system see also the picture on page 14 Pressure fluctuations in the sewer system may not affect the pressure in the condensate drain hose supplied with the siphon lt Open connection to sewer The siphon must be checked at least once a year Disassemble the siphon and clean every part of it Check the functioning of the siphon by filling it with water Then blow into the top condensate inlet and N gently increase the pressure At some point water starts coming out of the siphon outlet During this the floating ball should gradually drop into its seat By doing this the ball then should close the outlet al most completely When mounting the siphon before commissioning the boiler and or after maintenance the siphon must i ALWAYS be completely filled with water This is a safety measure the water in the siphon keeps the flue gases from leaking out of the heat exchanger via the condensate drain 17 6 3 Flow and return connections In the picture an example is shown of the installation of the flow and return connections in combination with BOILER several functional and or safety components The pic ture does not necessarily contain ALL safety compo cham NOT nents that may or must be a
116. ontact can be connected to the thermostat terminals connections 13 14 P5AB Timer Contact 1 display A9 When this parameter is activated and The thermostat terminals are bridged timer contact closed the normal day time temperature is used as set point The thermostat terminals are not bridged timer contact open the night reduced temperature is used as set point 74 11 3 Indirect hot water calorifier The following chapters describe the different functions of the boiler and their related controlling behaviour set tings as a central heating boiler with an indirect hot water function 11 3 1 PUMP AND 3 WAY VALVE CONTROL See chapter 19 for several installation examples of the boiler and the preferred functions When the boiler is used as an indirect boiler for both central heating and hot water function this hot water function can be activated by using a DHW pump or a 3 way valve P4AB DHW Pump Config 0 Pump 1 TWV display B1 Use this parameter to program whether the flow to the indirect water tank calorifier is controlled by a pump 0 Pump or a 3 way valve 1 TWV 11 3 2 TANK THERMOSTAT An external thermostat can be connected to the boiler connections 5 6 When there is a hot water demand and the tank thermostat closes the boiler will start for the hot water demand The calorifier tank pump will be activated or in case of a 3 way valve this valve will turn to the position to supply heat to
117. ontrols nii tuia ona 70 TETS cMaxcooling tima idtm qnn atta Bun RGB 70 11 1 3 Temperature display 2 2 0 22 nennen nnne nnne nnn 70 111 4 Water pressure odit eee eee ees 70 TERS ra tet ae etat ade 70 11 1 6 Soft Start option eH 71 11 1 7 Pump mode EC technology esses eher nnne 71 11 2 HEATING ts iiiter RESPIRO ARP Rte DILE EORR FED RR Re ieee ee 72 11 2 1 Controlling behaviour settings 2 2 020000000 a nnne 72 11 2 2 Room thermostat on off 73 11 2 3 Room thermostat OPEN THERM nnns 73 11 2 4 Outside temperature related flow control sss 73 11 2 5 0 10 Vdc Remote flow temperature set point 2 73 11 2 6 0 10 Vdc Remote burner input control senes 74 11 2 Timer contactfunction o rr E o o bete p ate IER 74 11 9 INDIRECT HOT WATER 7 GAEORIEIER 21 52 1 guage iiie pt tenti T na Pete bene tete deris 75 11 3 1 Pump and 3 way valve nnne 75 11 3 2 Tank thermostat abe ad sets ire 75 11 3 3 RANK Sensor hg luliae 75 11 3 4 Low high flow temperature
118. oof in accordance with DIN 4726 4729 If not make sure that the boiler circuit is separated from the heating circuit by a plate heat exchanger This way no oxygen that entered the heating system through these pipes can reach the boiler e Check the total heating system for any leaks This to prevent oxygen entering the system through these leaks The boiler has an automatic air vent situated on top of the boiler at the roof panel This vent must be opened during the filling of the boiler and the heating system to make sure that no air oxygen is trapped in the heat ex changer of the boiler NOTICE Check that the screw cap has been loosened at least one twist Shortly after put ting the boiler into operation check the water pressure and add or lose some water to obtain the required pres sure During this proceedings make sure that no water can enter the boiler and make contact with the electrical parts 12 3 Third check the water flow Before the boiler will be started it must be sure that the boiler pump is functioning and that there is a water flow over the heat exchanger Check the electrical power supply of the boiler When this is connected correctly the display will show Display message Boiler is not active To activate the boiler press ON OFF button for six seconds Display message ne B EUIS E gt gt gt 4 2 3 4 4 2 3 4 Boiler is standby To
119. operating screen NOTICE Using the MENU button during the User lock display will reset the boiler and the boiler will return to the operating screen Changes will be neglected in this case 58 10 16 Setting the parameters with the display menu The functions of the controller are embedded in de electronics by means of parameters The values and settings hereof can be programmed by a skilled and trained service engineer with the help of a computer laptop the correct software and an interface cable A selection of these parameters can be programmed at the control panel of the unit itself without the use of a computer The following table gives a list of all parameters that can be programmed at the control panel without the use of a laptop computer NOTICE Only the password for level 1 is issued in this manual More advanced parameters need to be programmed by a skilled and trained service engineer with access to level 2 When Modify no the parameter can only be programmed at level 2 ene PARA DESCRIPTION UNITS TEXT DISPLAY poss 1 P5BE Step modulation 1 O off S tje p miojd u l no 2 Blocking offset flow temperature control 5 Off 1 3 yes 0 3 P5AP Proportional range temperature control C H E s 1 3 no z 4
120. osition of the gas Change the settings of the gas valve For example propane Take the following actions d Mount the air restrictor kit as described below on this page Set the gas valve 2 Turn the adjusting screw 2 three full strokes round clockwise 3 Press the SERVICE button for about 3 seconds to start up the boiler in service mode 4 When after several starting attempts the burner does not ignite and start to burn turn the adjusting screw 2 one quarter stroke back counterclockwise and start service mode again 5 When the burner ignites and starts to burn continue the setting of the gas valve at maximum and minimum load as described in the previous chapters and use the values for Natural Gas G31 Gas type Nat Gas G20 Nat Gas 625 Prop 63177 Buta B P G30 Cal Value Hi EN437 MJ m 34 02 29 25 88 00 116 09 CO max output 96 9 0 9 0 10 3 10 4 O max output 96 4 9 4 9 5 2 5 3 CO min output 96 8 5 8 5 9 6 9 6 O min output 96 5 7 5 7 6 2 6 5 measured without boiler door Butane or propane or B P mixtures may only be used with an air restrictor and with the venturi directly i A butane propane B P kit is needed see accessories list page 13 mounted on the fan See the instructions for butane propane kit below Set the gas valve until measured values match table within 0 196 gt values within 0 2 Instruct
121. ot water tank calorifier is installed a hot water sensor must be connected to these terminals In case of a DHW heat demand the set point will be shown in the display An external on off thermostat can also be connected to these terminals When there is heat demand terminal 5 and 6 are bridged the flow temperature going to the heating coil s will be shown in the display 31 32 7 8 GENERAL BLOCKING A heat demand that will start the burner will be blocked when terminals 7 and 8 are not bridged This connection is for the use of external safety devices terminals must be bridged for allowing burner to fire 9 10 EXTERNAL WATER PRESSURE SWITCH A water pressure sensor is mounted in the boiler As an option a water pressure switch can be in stalled The sensor can be replaced by the water pressure switch which can be wired to the terminals When terminals 9 10 are not bridged the boiler will lock out PARAMETER A parameter change is needed 11 12 ON OFF STAT OR OPEN THERM HEATING CIRCUIT OPTION 1 An ON OFF thermostat can be connected The boiler will use the set programmed flow temperature for the heating system when these terminals 11 and 12 are bridged OPTION 2 An OpenTherm OT controller can be connected to the terminals 11 and 12 The boiler software will detect and use this OpenTherm signal automatically 13 14 0 10 VDC CONTROL SIGNAL These terminals are used for an external 0 1
122. ould therefore be prevented Usual spots where air is most likely to seep in are suction gaskets pumps air valve working as a venting pipe O rings gaskets in stuf fing box under floor heating pipes 6 11 Plastic piping in the heating system When plastic pipes are used in the central heating system these should be separated from the boiler system by using a plate heat exchanger Diffusion of plastic can cause air to enter the heating system Be aware that plas tic piping is often used in under floor heating systems When no measures have been taken to prevent the en trance of air into the boiler system the warranty of the boiler and any boiler part may be deemed invalid heating zone heating zone plate heat 6 12 Automatic air vent This automatic air vent is only used for bleeding the air from the heat exchanger of the boiler while filling the sys tem Externally measures must be taken to bleed air from the heating system using air separators in combination with automatic air vents DE AERATION PROGRAM When the unit is fired for the first time the unit starts a de aeration program One cycle is 5 seconds pump running and 5 seconds pump off A complete de aeration program consists out of THREE cycles The de aeration program can be interrupted stopped by briefly pressing the service button 6 13 Automatic water filling systems When using an automatic water refill system some precautions should be taken fres
123. parameter change needed A boiler e heating zone System 2 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 Place bridge 13 14 OS Outside temperature 4 2 E04 016 585 sensor No parameter change required A boiler e heating zone System 3 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 R _ Modulating room unit 13 14 E04 016 355 with timer os Outside temperature 1 2 E04 016 585 sensor No parameter change required A boiler e heating zone System type 4 GJ 53 GJ System 4 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 R Modulating room unit i ena E04 016 355 with timer T Calorifier ST Calorifier thermostat 5 6 E04 016 303 or tank sensor OS Outside temperature 4 2 E04 016 585 Sensor DV Diverter valve 28 29 30 31 3 way valve Parameter change required A 7 boiler e heating zone System 5 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 Modulating room unit 13 14 E04 016 355 with timer T Calorifier tank ST
124. pensation control Calorifier control Connections for Boiler pump 0 10 VDC remote flow temperature set point control 0 10 VDC remote burner input control Outside temperature sensor External calorifier pump or diverter valve Cascade control When using the integrated cascade control a maximum of twelve boilers can be controlled in a cascade configu ration By the use of an appropriate external control this number may be increased at will 0 10 VDC connection available The boiler flow temperature or power input can be controlled by an external 0 10 VDC signal When a number of boilers are cascaded the signal should be directed to the master boiler only A signal of 1 48 Volt will switch on the boiler s less than 1 4 Volt will switch off the boiler s Time program For both central heating and hot water function of the boiler time programs with three programmable periods per day are available These time programs are set and activated by entering the desired settings directly at the boiler control panel 2 2 Technical specifications datasheet GENERAL Product Identification Number CE 0063 BP3254 Classification 2 Gas Appliance B23 B23P C13 C33 C43 C53 C63 C83 Type boiler S CB 120 Water content est Litre 8 3 Weight empty kg 78 Dimensions h x w x d mm 842 x 476 x 486 Flow return connection
125. played There are three options that can be selected A maintenance message appears after A programmed date is reached An amount of burning hours is reached An amount of ignition cycles is reached One single option can be activated or all three options Operating screen Operating screen iH EJA T I N G b o i tr e r Jo f f eee Press MENU Select Maintenan using lt amp gt and press ENTER Rlesje t Es Fe ES PPS GS ESPERE FRIES Press A to reset the Counter for the total amount of burning hours Counter for the total amount of ignition cycles The text will blink once briefly after resetting M a i n tle ln Mlelale DT T T JJ J wy Blinking second line What is blinking at the second line before a selection is made is the active maintenance option Press A V to change the selected blinking option ee Press gt to set The option that is blinking can be changed using by A amp V Date for the Maintenance message Total amount of burning hours for the Maintenance message Total amount of ignition cycles for the Maintenance message After selecting one of these values the boiler returns to the maintenance operating screen Press ENTER to confirm the changes Aee
126. pplied always have the supplied installation carried out by a skilled installer according to with boiler all applicable standards and regulations It is advised to install two service valves underneath NOT the boiler so the boiler can be isolated from the heat supplied ing system when needed The valves must be posi with boiler tioned in such a way that no safety components like pressure relief valves and expansion vessels can be isolated from the boiler Ecc epos The boiler pump should always be mounted in the re turn pipe of the boiler When using a system pump this pump should always be mounted in the return pipe of the heating system Never use chlorine based fluxes for soldering any pipes of the water system pressure relief valve boiler bleed valve for service N service valves NOTICE Accessories in the picture are NOT supplied with the boiler flow return 6 4 The expansion vessel A properly selected expansion vessel must be mounted according to all applicable standards an regulation 6 5 Pressure relief valve The boiler has no internal pressure relief valve This should be installed in the flow pipe of the heating system and close to the boiler When having cascaded boilers each boiler should have its own pressure relief valve It is ad vised to use a T piece for this Advise is always to install service valves so the boiler can be isolated from the heating system when needed Make sure th
127. pump is connected to fixed power supply 30 31 32 Relay P1 is not used Pump P2 calorifier pump Pump P2 is a DHWi pump and is used when P4AA 1 meaning the appliance is an indirect calorifier Pumps P1 and P2 are connected to one fuse of 5 A so the total nominal current of pump P1 and P2 may not exceed this 5 A To limit the inrush current switching sequence has been set so that pump P2 always switches 100 ms later than pump P1 The maximum nominal current of pump P2 must also be 2 A again due to inrush current 460 3 way valve The combined nominal current of pump P1 and the 3 way valve must be smaller than 5 A So the inrush current of the 3 way valve must be lower than 3 A Pump P3 system pump The nominal current of pump P3 must be equal to or lower than 2 A implying PT 460 W Warning EC pumps In case of using an electronic commutating pump the relays 1 2 or 3 may not be used for the power connection because of the inrush current of the electronics of the pump Directly connect the pump to an external power supply Control connections of an EC pump can be established in several ways set by parameter P5BN See 11 1 7 on page 71 25 8 FLUE GAS DISCHARGE AND AIR SUPPLY SYSTEM 8 1 General The boiler has a positive pressure flue system The available combined pressure drop for the inlet and outlet sys tem is 160 Pa Notice e Install the horizontal flue components with a 3 fall in the d
128. r S3 this sensor will be used P5AP Proportional range single heating boiler display A3 The proportional range for controlling the flow temperature of the boiler This function is active when the unit is controlled by the internal flow sensor S1 and used for single units When controlling cascaded units with an ex ternal system sensor S3 this sensor will be used P2MI Blocking offset System CH temperature control display A6 The amount of degrees the measured temperature exceeds the active flow temperature set point before heat demand stops Only active when the unit is controlled by an external system sensor S3 The following graph shows the relation between the several parameters BOILER OFF WHEN CONTROLLING ON INTERNAL FLOW SENSOR SETPOINT OFFSET Settings P5 Offset P5 AP Proportional band P5AL Hysteresis Temp set point Burner starts at 45 C Set point Offset Hysteresis 50 5 10 45 C OFFSET SETPOINT HYSTERESIS Burner stops at 55 C Set point Offset 50 5 55 C WHEN CONTROLLING ON EXTERNAL FLOW SENSOR ALLOWED TO MODULATE Settings Y Boller on P2 MI Offset P5 AP Proportional band P5AL Hysteresis Temp set point PROPORTIONAL BAND Burner starts at 65 C Set point Offset Hysteresis 70 5 10 65 C Burner stops at 75 C Set point Offset 70 5 75 C 72 11 2 2 ROOM THERMOSTAT ON OFF A room thermostat with a fixed set poi
129. r o 0m wh 28600 i 10 2280 88s 15 17189 35 36 10 10 1 USER INTERFACE Control panel display unit ue CONTROL PANEL DISPLAY 2 rows each 20 characters NN Press and hold for six seconds to switch boiler on off Is also used as RESET button and ENTER button when programming Connector for connecting computer cable MENU Buttons can be pushed to open menu a gt CAS Buttons to toggle through measured temperatures Also used for navigating through the menus and for chang ing values x Ad ax Button to activate service function hold for three seconds SERVICE Schornsteinfeger function only for Germany SA e Light lights when controller detects good flame signal NU Lights when burner is burning P 10 2 Control panel menu structure BASE SCREEN appears during operation HEATING No demand Standby burning NOTICE Pressing too gt gt gt 118 C 125 C long will switch off the boiler 2 press ON OFF for three seconds to press MENU programme in standby mode 1 view data Display shows 2x20 digit mes press A sage for three seconds Message can be set in parame ters example Company na
130. r temperature ego This is the duration within which the water temperature must be between the 65 C 50 70 a d 20 Start of the anti Legionnaires disease program start day and time can be programmed Time 10 min steps The settings of these parameters P5 Cl P5 CJ and P5 CD must be programmed according to all applicable anti Legionnaires disease preventing regulations The setting of these parameters can only be done by the manufacturer supplier of the water heater or by a techni cian with access to programming level 2 at the control panel of the unit without the use of a computer NOTICE The use and activation of this function won t guarantee a Legionnaires disease free installa tion The responsibility for a Legionnaires disease free installation remains at the end user owner 78 11 4 Cascade control The following information is also found in the specific cascade manual supplied standardly with Strebel cascade accessories or on request Before commissioning a cascade installation a number of parameters has to be changed These parameters can be programmed on the unit itself without the use of a computer Changes in parameter may only be carried out by a skilled commissioning service engineer who has had N specific training for setting up the S CB Px 120 range boilers He will be able to check whether the installa tion functions correctly after the parameter change has
131. r thermostat 5 6 E04 016 303 or tank sensor OH Low loss header FS Flow temperature sensor 3 4 E04 016 304 SNV Non return valve low resistance type OS Outside temperature 4 2 E04 016 585 sensor Parameter change required A boiler e heating zone System type 9 3 System 9 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating 25 26 27 pump Modulating room unit RT with timer 13 14 E04 016 355 P2 DHW primary pump 29 30 31 T Calorifier tank ST Calorifier thermostat 5 6 E04 016 303 or tank sensor OH Low loss header temperature 3 4 E04 016 304 sensor Non return valve SNV low resistance type os Outside temperature 1 2 E04 016 585 sensor Parameter change required A boiler e heating zone 107 System type 10 System 10 Name Wire terminal Order nr P1 Boiler pump 25 26 27 RT Modulating room unit with timer 13 14 E04 016 355 SNV Non return valve low resistance type OH Low loss header FS Flow temperature sensor 3 4 E04 016 304 OS Outside temperature sensor 1 2 E04 016 585 Parameter change required A boiler master B1 boiler slave1 B2 boiler slave2 B3 boiler slave3 heating zone 108
132. reached isplay message Dn toe in a nj oo B u r in i n g Reason Maintenance option of total amount of burning hours has been reached Display message Mis inte nis ni Reason One of LA abovementioned maintenance options has been reached 69 11 CONTROLLING OPTIONS AND SETTINGS 11 1 General The following chapters describe some general functions of the boiler and their possible use 11 1 1 EXTRA BOILER CONTROL When all units cascaded are firing at their maximum it is possible to start an extra external heating source This unit can be connected to the Burner Burning contacts connection 21 22 P5DE Extra boiler output enable 1 display C4 When this parameter is set at 1 the contact Burner Burning will close but only when all units are firing at a cer tain programmable input percentage The standard factory setting for this function is OFF 11 1 2 COOLING TIME The fan will cool down the heat exchanger according to the temperature settings parameters of the software With this cooling parameter the maximum run time of the fan can be programmed P2LK cooling time display D4 This function is not used for central heating boilers 11 1 3 TEMPERATURE DISPLAY ON OFF Selection for showing the measured temperatures in the operation display of the boiler P5BJ Temperature display 1 display D5 The measured te
133. replace sensor There is no water in the unit while firing This is an unlikely situation while all the safeties for checking the water presence didn t detect anything Only a lot of air in the system unit under pressure can cause the water pressure switch to switch while no water is present Also the water leak detection did not react Bleed all air from the unit so the heat from combustion can be transferred to the water and won t leave through the flue system Cause Heat exchanger failure Corrective action This is an unlikely situation but when there is severe damage to the heat exchanger the combustion product will not be able to transfer all heat to the system water The heat that is not transferred will convert to an increased flue gas temperature Display message F a i t e d b u r n e r s t a r t oln 9 9 9 5 n r s Reason Boiler not operational after 4 starting attempts Cause Check the igniter ignition electrode and replace clean it if necessary Check the state of the ceramic insulator A small crack can prevent the spark to form at the end of the electrode Check the distance between the electrode pin earth pin and burner Check the state of the ignition cable and replace it if necessary Check the state of the earth wire connection of the igniter and replace it if necessary Check the state of the sparkplug cap and replace it if necessary Ch
134. s Display message Pal atm TT eH T E EA F13 Pleie eh 1 1 1915191151115 Reason Failure during programming of the parameters Programming of the parameters NOT successfully completed Corrective action Unit is not in stand by mode fan must not run during programming Check programming wire and connections and try again Check if the software complies with the PCB Replace the programming wire Replace the display PCB Display message C I i x o n J J F15 oln 9 9 9 5 n r s Heat exchanger fuse or burner door clixon exceeded maximum allowed value Reason Cause The thermal fuse of the heat exchanger has opened permanently Corrective action Switch off the electrical power and gas supply and contact supplier Cause The burner door clixon has opened Corrective action Remove the burner door of the heat exchanger and check the burner door gasket for leakage Check the burner door for deformation when it deforms it must be replaced Check the heat exchanger for dirt and check that the flue is not blocked If heat exchanger is clean reset manually the clixon itself and reset the boiler FEE 0 F16 felelei s jniris Reason Temperature difference between flow and return exceeds limi tation value or Heatexchang at Risk has occurred 3 times Cause The water flow through the
135. short time e Switch off the boiler by pressing the ON OFF button for six seconds Make sure that the following display screen is visible message Gne re n ttt tt E E RE EUR IE ER ERES RES e Switch off the electrical power supply of the boiler remove connection from the wall socket or switch off the main power e Close the gas valve gas supply e Incase of possible frost damage drain both the boiler and the heating system NOTICE Before starting to drain the boiler first start draining the heating system and subsequently open also the two drains of the boiler 89 16 90 FAULT CODES AND BLOCKING CODES 16 1 Fault codes IMPORTANT To avoid electric shocks disconnect electrical supply before performing troubleshooting To avoid burns allow the unit to cool before performing troubleshooting Be aware that a fault code is an indication that the unit or the system needs attention When repeatedly having faults these should not be neglected The first step is to check if the unit is installed according to the instructions If not first make sure the installation complies with the installation manual Always check the fuses on the control board before replacing any major components A blown fuse can prevent the controller or other components from operating Most faults can also be caused by a bad wiring and or connections even if it is not spe cifically mentioned With every fault it is wis
136. son Flame detected during normal operation but was lost while running mese eee F10 ofn 9 9 9 5 Reason Flame signal is detected while it cannot be expected epee ee eet F11 oln 9 9 9 5 n r s Reason The controller does not detect a correct fan speed M F12 Jojn 9 9 9 5 nirjs Reason Software parameters have been programmed no nre F13 ojn 9 9 9 5 h r s Reason Fault during programming of the boiler software parameters eye ee E F15 jo n 9 9 9 5 Reason Rear wall thermostat clixon detects a too high temperature Se F16 Jojn 9 9 9 5 nirjs Reason Temperature difference between flow and return exceeds limitation value or Heatexchang at Risk has occurred three times mese ee F17 Join 9 9 9 5 Reason Maximum thermostat clixon measured a too high flow temperature B BS P E e FS ie ujm e oln 9 9 9 5 hj r s Reason The pressure switch detects a high pressure in the flue siphon system 67 10 17 2 BLOCKING CODES The following graphs describe the blocking codes of the boiler A blocking code is only a temporary blocking of the bo
137. ssure relief valve siphon pump automatic air vent expansion vessel HL 8 Rx low loss header 22 6 18 3 EXAMPLE OF A MULTIPLE BOILER HEATING CIRCUIT NON RETURN N N N VALVE N low resistance dx type E AA NOT SPRING N N LOADED N N J HEATING ZONE 23 T HYDRAULIC GRAPH BOILER RESISTANCE mWC 7 1 High efficiency pump The boiler software is set on a modulating pump High efficiency pum 3 yP P AT 25K AT 20K 10 0 9 0 18 0 27 0 8 6 0 5 0 84 0 T 3 0 2 0 1 0 0 0 T T T T 1 0 0 1 0 2 0 3 0 4 0 5 0 Resistance Boiler il Max Head Pump Water flow m h gt O Head for Installation Head Pump Head Pump characteristic line based on the UPML 25 105PWM pump In this graph a minimum and a maximum head for the pump are depicted the pump will modulate between these two levels 24 7 2 Pumps electrical power limits General The inrush current of a conventional pump is approximately 275 x its nominal current The maximum current that the relay on the PCB can switch is 5 A The conclusion from this is that nominal currents of pumps which are controlled by the PCB may not exceed 2 A Pump P1 boiler pump Modulating boiler
138. t over pressure and must have a mini mum temperature class of T120 8 7 Flue gas outlet amp combustion air inlet calculation examples For five typical flue gas outlet amp air inlet configurations the maximum lengths of the straight pipes will be calcula ted First the general component values are given in the next table 100 mm Resistance R Pa 130 mm 150 mm twin pipe Component flue straight tube m twin pipe twin pipe air flue air flue air 45 bend 90 bend roof terminal zeta 0 05 roof terminal zeta 1 0 roof terminal zeta 1 5 roof terminal concentric wall terminal concentric TP adaptor Do NOT reduce pipe diameters relative to boiler connection diameter Zeta values FLUE GAS OUTLET zeta 0 open outlet zeta 0 05 conical outlet 1 H D 1 0 zeta 1 0 Lo H D 0 5 zeta 1 5 Dye te 28 Values printed in grey applicable for larger pipe diameters than regular boiler connection AIR INLET H D 1 0 zeta 1 0 FLUE GAS OUTLET AIR INLET WALL NOTICE This table can only be used for a single flue air system for one boiler Do NOT use this table for common flue systems with cas caded boilers 7 1 MAXIMUM STRAIGHT LENGTHS
139. tage be changed Press MENU to access the main menu Press MENU to return to the service menu Use 4 amp gt buttons to browse through the monitor screens Press MENU to go to the operation menu of the service mode Press SERVICE to exit the service mode The unit will return to the standard operation display Maximum RPM table Strebel Px 120 RPM Max set point 6500 Max actual 6095 Margin on actual 175 The maximum rpm used by the controller as set point The maximum rpm that the fan is actually able to run The maximum actual rpm may be lower than the maximum rpm set point The fan may not be able to reach the maximum rpm set point because of the unit s resistance which is still correct according to its design The relation between the maximum rpm set point and the maximum actual rpm is given in this table This table applies also to the service and Schornsteinfeger function of the boiler 42 10 6 Schornsteinfeger function The following graphs describe how to use the Schornsteinfeger function NOTICE This function is required for Germany and can be activated by parameter P5 BK The standard factory setting for this function is OFF The purpose of this function is to have an easy interface for the Schornsteinfegers in Germany to be able to do their required A testing on the boiler This is a simplified function similar to the normal service fun
140. the boiler Dampen external heating system control to prevent sudden boiler temperature rise Display message L a c k 2 949 91 s n r s When the unit starts firing it expects to measure temperature rise If this temperature rise is not detected there is suspicion that there is no medium water present to transfer heat from combustion to the sensor The lack of water can cause this fault when the unit is firing Corrective action Make sure there is water present in the unit before firing palsy message Ree ee oln 94919 s n r s Return sensor is detected by the boiler pabaymessage jojn 949191 s n r s 91 92 Display message F lIj uje n ijg n E 9 9 9 5 n r s Reason Flue gas temp exceeded 3 times limitation value within a certain period Cause Heat exchanger polluted and not able to transfer enough heat to system water Check and clean heat exchanger Bad flue gas sensor or sensor connection partly shorted The sensor is of the type NTC This means if the temperature rises the resistance lowers A partly shorted sensor will drop its resistance and therefore measure a raise in tem perature when actually there is none Check for moist in the sensor connections or
141. the power of pumps P1 connections 30 31 32 and P2 connections 26 27 28 29 may not exceed 350 W Nominal pump current of P3 may not exceed 2 A therefore its power may not exceed 460 W cf 7 2 26 27 28 29 DIVERTOR VALVE CALORIFIER When using a calorifier hot water tank a 3 way valve or a pump P2 can be used to divert hot water to the heating coil of the calorifier tank This 3 way valve will open when the hot water storage tank calorifier has a heat demand PARAMETER A parameter change is needed 28 L2 wire heating position 29 Neutral wire 30 Ground wire 31 L1 wire hot water position The inrush current of the 3 way valve may not exceed 3 A see also 7 2 27 28 29 CALORIFIER PUMP P2 When using a calorifier hot water tank a 3 way valve or a pump P2 can be used to divert hot water to the heating coil of the calorifier tank This pump will start when the hot water storage tank calorifier creates a hot water demand PARAMETER A parameter change is needed Nominal pump current of P2 may not exceed 2 A therefore its power may not exceed 460 W see also 8 7 2 30 31 32 FIXED POWER SUPPLY FOR MODULATING BOILER PUMP 230V 50Hz Connection for modulating boiler circulation pump P1 The pump is powered permanently and modu lated by the PWM signal of the burner controller 33 34 35 MAIN POWER SUPPLY TO BOILER 230V 50Hz The power supply connection of the unit 33 Phase wire 34
142. the tank coil s In case of a heat demand and hot water demand the CH pump will switch off until the hot water demand ends P4AB DHW Pump Config 0 Pump 1 display B1 Use this parameter to program whether the flow to the indirect water tank calorifier is controlled by a pump 0 Pump or a 3 way valve 1 TWV 11 3 3 TANK SENSOR A tank sensor can be connected to the boiler The tank hot water set point and related controlling parameters are set in the boiler controller A hot water demand is detected by the boiler when the sensor water temperature drops below the set point The calorifier tank pump will be activated or in case of a 3 way valve this valve will turn to the position to supply heat to the tank coil s In case of a heat and hot water demand at the same time the heating pump will switch off until the hot water demand is stopped water temperature is reached 5 Hysteresis DHW tank temperature display BF The amount of degrees that the hot water temperature in the indirect water tank calorifier needs to drop relative to the hot water set point before the heat demand is transported to the boiler 75 11 3 4 LOW HIGH FLOW TEMPERATURE TO TANK COIL This function can only be used for an indirect programmed boiler parameter P4 AA 1 Normally for a regular calorifier a fixed flow temperature of 85 C is supplied to the calorifier heat exchanger in case of a heat demand This hot water flow will i
143. tighten the flange nuts with the other hand as far as possible onto the threaded studs Now the burner door is in place and the nuts can be tigh tened with a torque key Tighten the nuts in the order given in the picture below The specified torque value for tightening the bur ner door flange nuts is 8 Nm 18 USER INSTRUCTIONS After installing and commissioning the boiler demonstrate the operation of the entire central heating system to the end user The user should be made familiar with all safety precautions of the boiler and the installation The user should be instructed that service and maintenance of the boiler is required every 12 months Regular service and maintenance is essential for a safe and proper operation of the boiler Hand over the documents that are supplied with the boiler 103 19 INSTALLATION EXAMPLES The following schematics present several ways of mounting the heating installation All schematics are purely functional Safety components must be added conform all applicable standards and regulations System type 1 104 System 1 Name Wire terminal Order nr P1 Boiler pump P3 Optional heating pump 25 26 27 pu Modulating room nit 13 14 E04 016 355 with timer No
144. ture reaches the temperature set in P5 AH warm weather shutdown the unit won t start for heating If the measured outdoor temperature drops P5 AH minus P2 HA the boiler can start up for heating again P6 BA CH User Setting C The set point will never be higher than the flow temperature set in parameter P6BA The maximum temperature is limited even if the calculated set temperature according to the heating curve would be higher P6 BB Heat curve night shift C The temperature reduction during the night relative to the setting determined by the heat curve P5AR Outside sensor 10K or 12K resistance 0 1 This parameter can be used to change the value of an ohmic contact of the outside sensor 0 12K and 1 10K Default the parameter 0 so the sensor is assumed to be 12 kO 51 DISPLAY The following graphs describe how to program the outdoor graph settings Operating screen Press MENU Select Outdoor using 4 amp gt and press ENTER Eon Fee es CO Press 4 amp gt to browse through the screens that are shown below Press A V to change the blinking value in the selected screen Press MENU to exit The unit will reset and go to the operating screen Press ENTER for confirmation screen after all changes are made lt l Cja inicje gt Clo nif i rim Press gt to confirm t
145. ulation of the flue gases Consult the flue gas supplier for detailed information and engineering 26 8 4 Pipe heights on a flat roof Height A ff This is the height of the air inlet A rain hood should prevent rainwa F ter entering the air supply system A When the inlet and outlet are mounted on a flat roof the inlet should be at least 60 cm above the roof surface and at least 30 cm above the maxi H lt lt mum snow level lt Example 1 JN Aik When the maximum snow level on the roof surface is 45 cm then the air Da SS AN N inlet should be at 45 30 75 cm 75 cm is more than the minimum 60 so the height will be 75 cm Example 2 H When the maximum snow level on the roof surface is 15 cm then the air N N inlet should be at 15 30 45 cm 45 cm is less than the minimum 60 cm 1 so the height will be 60 cm Height difference This is the distance between the flue outlet and the air inlet The flue gas outlet should be at least 70 cm above the air inlet It is ad vised to be equipped with a conical outlet When no air inlet connection is applied on the roof the flue outlet should be situated at least 100 cm above the roof surface Distance C The horizontal distance between the flue gas discharge pipe and air inlet pipe at roof level This distance should be at least 70 cm 8 5 B23P certified
146. ure to make these chang es The user can cancel or confirm by using the left and right ar rows CANCEL lt CONFIRM gt TIME DATE DAY menu In this menu one can set the time and the date SETPOINT menu In this menu one can change tem perature settings without the need for a password Heating set point Flow set point when controlling on off on set flow temp Heating reduced The amount of degrees diff relative to Heating set point during night reduction Parallel shift relative to out door curve also in outdoor menu possible Hot water set point Calorifier or Water heater depends on heater type Hot water reduced The amount of degrees diff relative to Hot water set point during night reduction PROGRAM menu In this menu one can set the CH DHW and Anti Legionnella program OUTDOOR menu In this menu one can set all Outdoor relevant parameters OPERATING HISTORY menu Shows burning hours DHW Heating etc parameter menu 01 Enter password FAULT HISTORY menu press V Reading last fifteen faults only reading MAINTENANCE menu By pressing gt one can set the following options Maintenance reset Maintenance Mode All Date gnition cycles Burning hours Mainten Off USER LOCK menu In this menu one can lock the menu for users 0 UNLOCKED 1 LOCKED When un l
147. xceeds a certain set value the following warning messages will be shown in the display Display message Reason Temperature difference T2 T1 has exceeded the blocking value as set in the parameters Display message H e a t e x ec h a n g ja t rji s k 919191 5 jh rjs Reason Temperature difference T2 T1 has exceeded the blocking value more than three times Set the parameters P2 CQ P2 CV gt 2 CV within t P2 CQ When this T2 T1 value exceeds the lock out setting the boiler will switch off and the following lock out code will be shown at the display Display message F I o w Rjejt u r n 44 iii oln ojojoj s Reason Temperature difference T2 T1 has exceeded the blocking value Programmed at the parameters P2 CO P2 CR until P2CV When these messages appear and or the boiler will lock out it means that there is not enough flow over the boi ler In this case check the functioning of the pump The boiler has no built in water flow switch If there is the possible risk of a water flow blockage of the external heating system the following pre cautions can be taken to ensure a water flow over the boiler e Separate the boiler circuit from the external heating circuit by using a low loss header or plate heat ex changer e When the boiler is not equipped with an internal built in water pressure switch install a water pressure switch externally

S-CB PX120 Installation, Operating and Maintenance Manual

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