Econoflame R30 Wall Mounted Condensing Boilers Installation
Contents
1. B1 232 5 Do m Qe S m wW Fig Dimensions of the R30 Type R30 45 R30 65 R30 85 R30 100 R30 120 B1 mm 120 120 140 140 140 D mm 80 80 100 100 100 D1 mm 80 80 100 100 100 G R3 R 3 4 R 3 4 R 3 4 R 3 4 L mm 340 405 510 560 670 La mm 74 90 90 90 90 W R1f Rp1 RaV Rpi RatZ Rpa RaV Rpa Ra Rp4 Table2 Dimensions ofthe R30 We reserve the right to make changes without prior notification The data may deviate slightly due to fabrication tolerances Conditions applicable to table 1 Gas consumption at Gas category Category of appliance Doc653 30CVo2A 1013 mbar 15 C dry Ius B23 C13 C33 C43 C53 C63 C83 1 Introduction 1 1 ISO 9001 registered by qM GASTEC 1 2 13 1 4 Stokvis Since its beginning in 1985 Stokvis has built up a strong reputation in the industry for the devel opment production and marketing of gas fired high efficiency boilers and water heaters in the 43 1200kW range Thanks to their unique design these boilers differentiate themselves due to the following High thermal output Environmentally friendly they meet the most stringent environmental requirements Low weight and compact size Durability Low noise level Broad control range Available in a wide range of models Through active market oriented resea2. Type At20K Pump data Nominal Boiler re Pump type WILO Pump Pump head Available Maximum flow rate sistance speed atnom headat Power con Q nom flow flow nom flow sumption R Q Q m3 h KPa KPa KPa WwW R30 45 1 68 14 RS 25 6 3 PWM 3c max 40 26 93 R30 65 2 57 20 RS 25 7 3 PWM 3c max 49 29 132 R30 85 3 38 25 RS 25 7 3 PWM 3c max 40 15 132 R30 100 3 78 28 TOP S 30 7 3 52 24 195 R30 120 4 70 30 TOP S 30 7 3 42 12 195 Table 9 Water flow quantity and pump data for the R30 Maximum power consumed is given in pump position 3 When using another At you can use the following formula for calculating the flow rate and resistance of the boiler Flow rate Q ee Nom flow rate AT new Boiler resistance 2 R 29 Boiler res at nom flow AT new After this you have to check the available head of the pump The boiler has a pump control circuit When the boiler is enabled the pump is switched on If the boiler is disabled the pump will continue to run for a few minutes more This run on time can be adjusted The standard time is 2 minutes Doc653 30CVo2A 5 4 1 2 Pump characteristics v v 0 5 1 0 1 5 Rp1 m s O 0 55 10 1 5 2 0 2 5 R m s a 0 5 10 Rp1 E 0 5 1 0 1 5 R 1 Wilo Star RS 25 6 Wilo Star RS 25 7 5 Wilo Star RS 30 6 7 Wilo Star RS 3
3. 17 0 85 0 19 2 96 3 24 0 120 0 Heat input gcv Hs kW 6 4 44 4 9 5 67 4 17 7 88 8 19 9 99 9 25 0 124 8 Heat input ncv Hi kW 5 8 40 0 8 6 60 7 16 0 80 0 18 0 90 0 22 5 112 4 Gas consumption Natural gas H 10 9 kWh m3 m3 h 0 5 3 7 0 8 5 6 1 4 7 3 1 6 8 2 2 1 10 3 Propane 24 65 kWh m3 m3 h 0 2 1 6 0 3 2 5 0 6 3 2 0 7 3 6 0 9 4 6 Gas inlet pressure Natural gas min max mbar 17 20 17 20 17 20 17 20 17 20 Propane min max mbar 30 50 30 50 30 50 30 50 30 50 Maximum water temperature of central C 90 90 90 90 90 heating system Maximum operating pressure bar 6 6 6 6 6 Water content litre 5 1 6 6 8 4 10 3 12 0 Water resistance AT 20 C kPa 14 20 25 28 30 Excess head of the boiler pump AT 20 C kPa 26 29 15 24 12 Connection for flue outlet D mm 80 80 100 100 100 Connection for air inlet D1 mm 80 80 100 100 100 Gas connection G R3 R3 R3 R3 R3 Water connection W int Rp1 Rp1 Rp1 Rp1 Rp1 W ext Ri Ri Ry Ri Ri Condensate drain Douter mm 25 25 25 25 25 Electrical supply V 230 230 230 230 230 Frequency Hz 50 50 50 50 50 Fuse protection A 6 6 6 6 6 Maximum power consumption excl pump W 97 98 123 130 215 Maximum power consumption incl pump W 190 230 255 325 410 Insulation IPX4D IPX4D IPX4D IPX4D IPX4D Boiler weight empty 5 kg 45 55 65 80 90 Table 1 Technical data R30 Doc653 30CVo2A Dimensions R30
4. Diameter Diameter Diameter Diameter Diameter Diameter 70 mm 80 mm 90 mm 100 mm 110 mm 130 mm R30 45 18 40 n a n a n a n a R30 65 n a 12 39 67 n a n a R30 85 n a n a 18 32 70 n a R30 100 n a n a n a 22 40 80 R30 120 n a n a n a 35 38 72 Table 6 Length of flue The above flue pipe lengths have been rounded down Flue diameter on the boiler These lengths apply to open type appliances For room sealed appliances these lengths apply to inlets and outlets combined Flue losses of various flue components expressed in meters of straight pipe The total loss should be subtracted from the maximum permissible flue length from the previous table Type Diameter in Pipe bend Pipe bend Pipe bend T piece mm 90 90 45 R D 0 5 R D 24 R D 0 5 R30 45 70 3 5 1 4 14 4 0 80 4 0 1 5 1 2 4 0 R30 65 80 4 0 1 5 1 2 4 0 90 4 5 1 7 13 4 5 100 4 9 1 8 1 4 5 4 R30 85 90 4 5 1 7 13 4 5 100 4 9 1 8 1 4 4 9 110 5 4 2 0 1 5 5 4 R30 100 100 4 9 1 8 1 4 4 9 110 5 4 2 0 1 5 5 4 130 6 2 2 2 1 6 6 0 R30 120 100 4 9 1 8 1 4 4 9 110 5 4 2 0 1 5 5 4 130 6 2 2 2 1 6 6 0 Table 7 Flue losses in metres of straight pipe Connection to the appliance If concentric discharge from the appliance is used the following maximum lengths excluding roof clearance are permissible Type Diameter in mm Maximum length of straight pipe in m Number of 90 pip
5. measured resistance value of the flow temperature sensor is outside the range of 10 and 126 C Repair the fault and press reset 13 Defective flue gas temperature sensor lockout input is interrupted The resistance value measured by the flue temperature sensor lies outside the range of 10 and 126 C Repair the fault and press reset An external safety device connected to the terminals 1 3 has been triggered Check and repair this safety device 14 Defective hot water sensor The resistance value measured by the hot water sensor lies outside the range of 39 and 110 C Repair the fault and press reset 15 Defective external sensor The resistance value measured by the external sensor lies outside the range of 39 and 110 C Repair the fault and press reset 20 21 Fault in gas valve control system After the burner has been switched off an ionisation signal of more than 1pA is still measured for 5 seconds Repair the fault and press reset 24 Faulty minimum fan speed During the pre purge a specific minimum fan speed is not achieved Repair the fault and press reset 25 Faulty maximum fan speed A specific maximum fan speed has been exceeded thereby failing to meet an ignition prerequi site Repair the fault and press reset 26 Faulty standby fan speed The fan speed is too high 300 rpm when the fan is switched off Repair the fault and press reset 30 CRC fault in control system parameters An EEprom fault has arisen in
6. of evaporation of the combus tion produced water At 298 15 K 25 C this is 2442 5 kJ kg 583 38 kcal kg For non condensating boilers 0 339 90 0 008 x AT wee 8299 anos gt 0377 100 lo CO x 0009 X AT 2 For condensating boilers As a result of condensation the efficiency at the lower value increases n 90 E 0008 AT A 75 0 006 AT gt No Mb 1 11 At Difference in temperature between the flue gases and the environmental temperature K nb Fuel efficiency at the gross calorific value No Fuel efficiency at the nett calorific value CO The volume of CO in the flue gas 96 Oz The volume of O in the flue gas 96 A _ The quantity of condensed water in the appliance per m gas in kg kg m gas meg l dH ef e Mg CaCO l meg 1 1 2 8 5 3 51 50 dH 0 37 1 1 78 1 25 17 8 of 0 2 0 56 1 0 7 10 e 0 285 0 8 1 43 1 14 3 MgCaCO3 1 0 02 0 056 0 1 1 54 1 Table14 Derivation of degrees of hardness 1 degree English hardness e 65 mg CaCO imp gallon 1 Grain US Gallon 0 958 odH 1 milligram equivalent per mval l 2 8 odH 1 ppm parts per million CaCO 1 mg CaCO3 1 For information The public water supply in general has a pH value of approximately 7 8 The temporary hardness will be 60 to 80 of the total hardness which can vary considerably form one place to another Doc653 30CVo2A Doc 6 53
7. or lockout fault and will be switched off Lockout faults can only be reset by pressing the reset button after rectifying the fault 3 Safety Bb BA Installation specifications Read the specifications before commencing with installation The equipment should be installed by a recognised installer in accordance with applicable na tional and local standards and specifications The installation should only be used for heating systems with a maximum water temperature of 90 C It is expressly stated that these installation specifications should be regarded as a supplement to the above mentioned standards and specifications which shall take priority over the information contained in this technical documentation Icons used Instructions that are of essential importance for the correct functioning of the installation If the actions operating procedures etc are not followed accurately this may cause serious dam age to the installation personal injury or damage to the environment Danger of electrical shocks Useful information Maintenance Work on the electrical installation should only be carried out by a recognised installer in accord ance with the applicable electrical regulations Work on the gas equipment and hydraulic installation should only be done by personnel having the required training in accordance with the applicable safety rules and regulations for gas instal lations Keep all unauthorised persons away fro
8. quantity of air The air quantity varies with the speed of the fan The gas train is equipped with a test point through which the gas pipe can be vented or the gas inlet pressure can be meas ured Doc653 30CVo2A 23 Burner heat exchanger package 15 After the gas air mixture has been correctly mixed it flows into the burner via the inlet channel Due to the overpressure the gas air mixture is forced through the burner to the external surface of the burner for combustion The heat exchanger is made of smooth stainless steel tubes in the form of coils It essentially consists of two parts one part is located immediately next to the flame where the major por tion of the heat transfer between the combustion gases and the water takes place The other part functions as a condenser for the flue gases where the transfer of latent heat takes place Stainless steel water distribution manifolds ensure optimum water flow through the heat ex changer Water connections These consist of a flow connection 4 and a return connection 7 There is a water temperature sensor 16 on the flow connection which apart from controlling the burner load also monitors the water flow in the boiler The latter is done in combination with the flue gas temperature sensor 8 Boiler pump 20 The boiler pump of the types 45 65 and 85 is located in the return connection of the boiler and is electrically connected directly to the corresponding terminals in t
9. the stored control parameters Check and change this parameter set Doc653 30CVo2A 31 CRCfault in safety relevant parameters An EEprom fault has arisen in the stored safety parameters Check and change this parameter set 32 Faultin low voltage supply The low voltage supply is too low or the fuse is defective Repair the fault and press reset X y Internal fault An internal fault has been detected in the electronic system Check and repair this safety device 6 5 Setting into operation 1 Openthe gas valve 2 Switch on the boiler using the on off switch on the control panel 3 Set the type of operation to automatic operation using the rotary selector switch Also see the operating instructions on the boiler 6 6 Switching off the appliance The appliance can be switched off in three ways A The boiler remains available for hot water operation Using the rotary selector switch set the type of operation to B The boiler is out of operation and only comes into operation due to the automatic frost protec tion system Using the rotary selector switch set the type of operation to C Switch off the boiler completely 1 Switch off the boiler using the on off switch 2 Close the gas valve 6 7 Warnings The appliance should be installed by a recognised installer These operating instructions should be closely followed If the cause of the fault cannot be determined contact the Service department Nev
10. 0 7 1 230 V Rp 1 Rp 14 6 17230 V Ri R 1 4 Qu B Lo a3 4 Q E e e ES 3 amp A 1 C o 1 9 o o 1 0 2 0 3 0 m3 h o 1 2 3 4 5 m3 h o O25 05 075 il s o 0 4 0 8 1 2 l s o 5 10 lgpm o 5 10 15 lgpm Q gt v 1 2 3 Rp1 m s o 0 5 1 0 1 5 Rp 1V 8 Wilo TOP S 25 7 7 Wilo TOP S 30 7 6 1 230 V Rp 1 Rp 1Y 5 a4 E 3 2 1 o o 1 2 3 4 5 6 m3 h o 0 5 1 1 5 2 l s i A o 5 10 15 20 lgpm QP Fig 5 Pump characteristics 5 4 13 Shut off valves It is recommended that manual valves should be installed between the flow and return connec tions to the installation 5 4 1 4 Valves It is possible to install mechanical non return valves These valves are intended to prevent water side short circuiting over the switched off boiler 5 4 1 5 Water flow protection device The boiler is equipped with a water flow protection device The flow sensor and the flue gas sensor ensure that the protection device gets triggered if the water flow is too low Doc653 30CVo2A 19 20 5 4 2 5 4 2 1 5 4 2 2 5 4 2 3 5 4 2 4 r T E Water pressure Operating pressure At a maximum flow temperature of 90 C and with the minimum water flow that occurs at a At of 20K the minimum operating pressure should be at least 1 5 bar The operating pressure should be measured when the pump is switched off If a lower operating pressure is required it is n
11. 30CVo2 A 31 32 Doc 53 30CVo2A
12. 45 80 R30 65 80 R30 85 100 R30 100 100 R30 120 100 Table 3 Diameter of air inlet The connection for the air supply is on the top of the boiler The air supply pipe should be airtight This is to prevent the suction of false air Horizontal com ponents in the air supply should be installed sloping in the direction of the supply opening Flue gas outlet The flue gas components may be single wall smooth or flexible and be made of e plastic aluminium e stainless steel Always consider the resistance when using flexible material Type Diameter of air inlet D mm R30 45 80 R30 65 80 R30 85 100 R30 100 100 R30 120 100 Table 4 Diameter of flue gas outlet The flue gas outlet is located on the top of the appliance and is designed for direct connection to a corrosion resistant flue pipe The flue gas discharge pipe to be used should be airtight and watertight at the joints and connec tions or should be seamless Horizontal components in the flue pipe should be installed sloping in the direction of the appliance minimum 5 cm per meter Doc653 30CVo2A 15 Due to the high efficiency there may be condensate formation in the chimney even at high water temperatures gt The condensate drain should never be blocked A direct connection to a brick chimney is not permissible since the chimney losses must be less than 1796 The following
13. 6 0 2 for propane G31 Reference value for CO Type R30 45 5 ppm for natural gas G20 G25 5 ppm for propane G31 Types R30 65 R30 85 R30 100 and R30 120 lt 10 ppm for natural gas G20 G25 10 ppm for propane G31 Doc653 30CVo2A Setting the CO value for the R30 series There is a flat setting screw on the venturi with which the CO value can be set at full load Set the boiler at full load and check the CO value If necessary adjust with the flat setting screw clockwise gives less CO anti clockwise gives more CO There is a torcx setting screw on the gas valve with which the CO value can be set at minimum load Set the boiler at minimum load and check the CO value If necessary readjust with the torcx setting screw clockwise gives less CO anti clockwise gives more CO2 After the CO values have been set they should be checked once again and corrected if necessary Conversion from natural gas to propane For the types R30 45 R30 65 R30 85 and R30 100 a throttle ring will be required for pro pane This should be installed between the gas valve and venturi After the conversion the CO values should be set at full load and minimum load For the type R30 120 it s only necessary to change the gas volume on the gas valve by using the setting screws Type Diameter of throttle ring R30 45 6 8 mm R30 65 6 0 mm R30 85 6 0 mm R30 100 6 8 mm Remove the measuring equipment and re fit the case T
14. Doc653 30CVo2A 5 2 3 53 5 3 1 5 3 2 Ensure that there is sufficient room around the device for maintenance and the replacement of components if necessary The recommended minimum clearance is as follows 1000 mm to the front free space for movement 400 mm above 250 mm below Since all the components can be accessed from the front no minimum distance is required on the left and right side We however recommend a minimum distance of 100 mm in order to enable easy opening of the casing Ventilation The ventilation of the installation room should conform to the applicable national and local stand ards and regulations In connection with ventilation keep in mind the following points a Follow the applicable national and local standards and regulations concerning the dimensions of the opening and the protection of the mechanical ventilation system if any The air inlet openings should be in two walls facing each other Use broad low inlet grills The ventilation outlet should be at high level as high as possible In the case of insufficient air supply it may be necessary to mechanically supply ventilation air Dan c Connections Gas connection The gas connection should be installed by a recognised installer in accordance with applicable national and local standards and specifications The gas connection is located on the bottom of the appliance The pressure on the inlet side of the appliance should be redu
15. R30 using a spirit level on a sufficiently sturdy wall using the suspension bracket provided A template has been provided in the packing box on which the positions of the fixing holes have been indicated Protection against frost Boilers that are not used during the winter are in danger of freezing Drain out the water from the filling and drain valve 5 Installation 5 1 5 2 1 5 2 2 Regulations The appliance should be installed by a recognised installer in accordance with the applicable national and local standards rules and regulations The commissioning should preferably be done by the Stokvis Service department to validate the warranty Installation area General Thanks to the design of the boiler radiation losses are negligible Due to the low noise level there is no need for additional sound insulation of the room Due to its compact design very little installation space is required The location options for the boiler are increased because it is supplied suitable for both open and room sealed operation see chapter 5 3 4 Installation The following guidelines should be followed in order to optimise the installation of the boilers The device should be installed in a frost free room due to the risk of freezing of the condensate drain The built in protection system is activated when the temperature of the central heating water falls below 5 C Pay attention to the location and temperature sensitivity of the device
16. SI OKVIS ENERGY SYSTEMS ECONOFLAME R30 WALL MOUNTED CONDENSING BOILERS INSTALLATION OPERATION amp MAINTENANCE DOCUMENTATION STOKVIS ENERGY SYSTEMS 96R WALTON ROAD EAST MOLESEY SURREY KT8 ODL TEL 08707 707 747 FAX 08707 707 767 E MAIL info stokvisboilers com WEBSITE www stokvisboilers com DOC653 30CV02 151204 Edition 30CVo24A 18 11 2004 O 2004 Rendamax B V All rights reserved No part of this publication may be copied and or published by means of printing photocopying microfilming or by electronic means on tape or in any other manner whatsoever without the prior permission of Rendamax B V in writing We are engaged in a constant effort to improve our products As a result of this process the products may deviate slightly from the descriptions contained in the present document Rendamax B V accepts no liability whatsoever for differences between the products delivered and the information contained in the present document Doc653 30CVo2A Table of contents 14 1 2 13 1 4 1 5 24 2 2 2 2 1 23 2 4 4 1 4 2 43 5 1 5 2 5 2 1 5 2 2 5 2 3 5 3 1 5 3 2 5 3 3 5 3 4 5 3 4 1 5 3 4 2 5 3 4 3 5 3 4 4 5 3 5 5 4 1 5 4 4 1 5 4 1 2 5 4 1 3 5 4 1 4 5 4 1 5 5 4 2 5 4 2 1 5 4 2 2 5 4 2 3 5 4 2 4 R30 Technical data Dimensions R30 Introduction Stokvis The supplier This document Service General restrictions Description General Main components Descript
17. afeguard is reset The OK signal will be lost if a fault occurs more than twice within 6 minutes the error code will be shown in the display with a 3 appearing above it or in the case of a fault that remains active for more than 6 minutes 1 High Limit thermostat STB has been triggered If the flow temperature has risen above 100 C the high limit will be activated Wait until the flow temperature is below the value set for at least one minute and then reset this safety function by pressing the reset button Doc653 30CVo2A 23 24 2 3 Interlock circuit has been interrupted An external safety device connected to the terminals ST 9 3 9 4 has been triggered Check and repair this safety device 4 No flame signal when the burner starts No flame is detected within the preset safety time when burner starts Restart is possible if pro grammed 5 Flame signal lost during operation When the burner is in operation the measured ionisation has fallen below 1pA 6 Limit temperature monitoring system has been triggered The flow temperature has risen above the value set for the same or the water flow is too low 7 The maximum flue gas thermostat has been triggered The flue gas temperature has gone above 100 C Repair the fault and press reset 11 Faulty flame signal An ionisation signal of higher than 1uA has been measured while the burner was not in operation Repair the fault and press reset 12 Defective flow temperature sensor The
18. al for external enable Bus Signal for bus connection Output symbols XQ Control signal to the main gas valves 4 Control signal to the ignition transformer CFan enabled S Boiler pump enabled Hot water primary pump enabled Setting the required flow temperature for central heating system operation Attention This setting is not active if a KKM E6 1111 or BME or an external o 5 V signal is con nected Openthe lid of the KM 628 and a black arrow will appear above P1 Press the reset programming button item 3 the red LED will light up then turn the rotary selection switch until the desired temperature appears in the display Again press the reset programming button the red LED will go out The new flow temperature will now be active Close the lid Set the required hot water temperature for hot water operation This is only applicable if the hot water mode is being used Open the lid Turn the rotary switch until the arrow at the bottom of the LED displays parameter P2 Press the reset programming button item 3 the LED lights up then turn the rotary switch item 5 until the desired hot water temperature appears in the display Again press the reset programming button the LED will go out The new value will now be active Close the lid Fault signals In the case of the fault a flashing A and an error code will constantly appear in the display In the case of a fault the cause should first be eliminated before the relevant s
19. ced to 20 mbar for natural gas and up to 5o mbar for propane using a gas governor The pressure loss in the supply pipe should be such that the pressure never falls below 17 mbar for natural gas and 3ombar for propane when the appliance is at maximum load In order to guarantee that the gas valve works at all times it is recommended that a gas filter is installed in the gas pipeline The gas filter can be ordered as an option to be supplied with the boiler Install a gas isolating valve directly under the appliance Electrical connections The electrical connections should be installed by a recognised installer in accordance with appli cable national and local standards and specifications The appliance is fully wired in accordance with the electrical diagrams delivered with the appli ance All the electrical connections are located behind the control panel The control panel can be eas ily opened after removing the locking screw The cables to be connected supply control enter through the bottom of the appliance via cable glands Doc653 30CVo2A 11 12 Fig 4 Connections of the R30 The appliance is suitable for a 230 V 50Hz power supply with live neutral earth Other connect ing arrangements are only permissible if an isolating transformer is used The appliance is phase sensitive The boiler can be switched on and off using the on off switch on the control panel The installer should use a 2 pole main isolating switch wit
20. d this indicates evaporation If the chloride content is very high the water is rendered more aggressive Can be caused by amongst other things improperly regenerated water softener The system should be flushed clean and filled with low chloride water In order to counter unnecessary wear and tear and blockages due to impurities present in the sys tem we recommend the use of a filter system with a mesh size of 100 microns Always place this in the return line of the secondary part of the system In order to guarantee a properly working system and long life one should remove suspended and corrosive particles by installing a suitable filter system The periodic inspection including the analysis of the system water and the cleaning of the filters should be performed If it is intended to add any chemicals such as inhibitors to the water please first contact Stokvis They can also give you advice concerning filter systems and other requirements Water analysis forms can be obtained from your supplier 6 Operating instructions 6 1 Operation The fan which is modulated by the temperature controller supplies the combustion air Due to the resultant under pressure in the venturi the zero pressure controller in the gas valve mixes in the required quantity of gas Gas and air are completely mixed in the venturi The gas air mixture is then fired directly in the burner The fan also removes the combustion gases The boiler has no lowe
21. design of the R30 boiler makes it suitable for use in heating systems with constant flow temperature weather dependent set point adjustment low temperature condensing system external temperature control via building optimiser o 5 Vdc 10 C 90 C below 1Vdc the boiler reverts back to the set temperature P1 see 5 3 2 connecting terminals Fig 2 The Stokvis R30 Doc653 30CVo2A 5 2 2 1 3 4 Overall view Fig 3 Main components Flue outlet connection Air inlet connection Gas connection Flow connection Automatic air vent Casing Return connection Flue gas temperature sensor 9 Fan 10 Pressure Gauge 11 Automatic boiler controller CON ONU UMP Description of principal components The boiler is made of the following components Fan 9 12 On off switch 13 Condensate drain 14 Frame 15 Burner heat exchanger package 16 Water flow temperature sensor 17 Gas valve 18 Venturi 19 Air intake silencer tpes 45 65 and 85 20 Boiler pump types 100 and 120 outside the boiler 21 Control panel The fan pulls in and compresses the combustion air drawn from inside the casing of the boiler The fan is a DC current fan equipped with a speed feed back signal This speed feed back signal is transmitted back to the controller which makes the necessary corrections Gas train The main component of the gas train is the gas valve 17 The gas quantity is controlled according to the
22. e P9 Actual maximum appliance load P10 Password Optical bus connection for Kesslab Reset programming push button Alarm programming LED Rotary selection switch for parameter number selection and required setting adjusting Output status Actual required parameter value Error code parameter number Status inputs Desired load required by the KKM if fitted Standby the boiler is out of operation and the frost protection unit is active Automatic operation the boiler is in operation for central heating and hot water production m Hot water operation the boiler is only in operation for hot water production amp I Service operation the boiler is operating at constant minimum load set at P17 I Service operation the boiler is operating at constant maximum load set at P9 Information and settings if the lid is opened With the lid open and by operating the rotary selection switch one can access the following 10 parameters An arrow at the bottom of the display indicates the selected parameter and the actual value of the same is simultaneously displayed Doc653 30CVo2A 6 4 P1 Actual Required flow temperature P2 Actual Required hot water temperature P3 Required flow temperature P5 Actual external temperature P6 Actual flue gas temperature Pg Actual maximum boiler load P10 Enter password only for trained technicians Input and output symbols lid open Input symbols lonisation measured for flame detection RT Sign
23. e bends 2 4 6 R30 45 80 80 80 125 17 14 12 R30 65 80 80 80 125 4 3 1 R30 85 100 100 100 150 16 14 13 R30 100 100 100 100 150 9 7 5 R30 120 100 100 100 150 10 8 6 Table8 Maximum length of straight pipe Doc 53 30CVo2A 17 18 5 4 5 4 1 5 4 4 1 Condensate drain Condensate water is formed due to the condensation of flue gases and this has to be drained from the boiler Pipe the condensate water directly into the waste water drain system If there is no direct connection to the drain system a water collection tank equipped with pump and level switch may be used to pump the condensate water into the drain system In view of the acidity only plastic drainpipes should be used Fill the bottle trap with water after installation the bottle trap beaker on the bottom of the boiler can be easily removed to do so Ensure that there is an open connection between the drain system and the boiler bottle trap It is not permissible for condensate to be drained into guttering since the condensate may freeze Hydraulic system Water flow Flow and resistance The minimum required water circulation over the boiler should be maintained at all times equivalent to At 25 K at full load The minimum required water circulation should not be adverse ly affected by the use of valves non return valves systems in which several boilers are connected to a common distribution pipe etc The maximum water flow is achieved at At 15 K
24. ecessary to adjust the maximum flow temperature Minimum operating Flow temperature in pressure in bar 1 5 90 1 80 Table 12 Minimum operating pressures at a rated volume flow of Q Boiler expansion vessel It is recommended that a boiler expansion vessel is installed in the return pipe work between the pump and the boiler shut off valves System expansion vessel The size of the expansion vessel is determined by the water volume of the system We recommend that the system expansion tank is placed in the zero point of the low loss header Water pressure protection device Install a pressure relief safety valve within 0 5 m of the appliance in the pipe between the appli ance and the shut off valves if any in accordance with BS6759 The size of this safety valve should be at least 1 2 but sized in accordance with the kW rating and system pressure Water temperature The maximum permissible water flow temperature is 90 C If the limit thermostat is triggered at 97 C the boiler will switch off and will automatically restart when the water temperature falls be low the limit temperature that has been set The high limit thermostat is set to 100 C if activated the boiler will switch off and will not automatically restart when the water temperature falls Water quality The composition and quality of the system water has a direct effect on the performance of the system as a whole and the life of the boiler Inapp
25. er carry out repairs on your own The condensate drain outlet should be removed or sealed if a boiler is shutdown during the win ter there is a danger that the condensation may freeze Drain out the water using the filling and drain valve The user should not change anything on the appliance or the drain system Annual inspection and good maintenance are important for guaranteeing optimum performance 7 Commissioning 71 General The commissioning should only be done by qualified personnel The guarantee will be void if this is not adhered to Doc653 30CVo2A 25 72 Commissioning Before operating the appliance the following should be done Switch off the electrical power supply of the appliance Remove the case This consists of the double front plate and the side plates Unscrew the 8 screws on the top and bottom The casing can then be removed in one operation Check the leak tightness of the gas connection Check whether the electrical connection and the earthing have been properly done Also check whether the phase L has been connected properly The boiler is phase sensitive Twist open the cap of the automatic air vent Fill the appliance and the system with water Fill the condensate bottle trap with water The beaker on the bottom can be easily unscrewed and filled Check the flue gas discharge connection and if present the air supply connection Open the gas valve and vent the gas pipe Switch on the electrical power supply
26. h a contact opening of at least 3 mm in the supply circuit to the boiler With this the entire boiler including the boiler supply pump relay can be rendered volt free for maintenance work or in the case of failure In order to prevent faults due to electromagnetic fields a screened cable should be used for the bus connection and for all sensor and control signals between the boiler and all external connec tion units The screening should be connected on both sides according to the EMC Directives Controls and options The boilers are equipped with a modulating control system The temperature can be controlled via a 0 5 Vdc signal for example in response to external temperatures If the voltage falls below 1 volt the boiler reverts to the set point set on parameter P1 A hot water priority circuit also forms part of the standard equipment an additional sensor is required Other options available on the boiler can be supplied to extend this The three following options are BME A pr Ge E temperature controller with the following features Programming of 3 heating periods with different room temperatures Adjustable night time boiler flow temperature reduction operation Choice between 2 weekly programmes Hot water priority circuit with 2 heat up periods Override for single hot water period during night time reduced flow temperature operation Optimum start time calculation Room temperature control with or without external temperature influence Opti
27. he boiler is now ready for operation 8 Maintenance 8 1 Safety Wear suitable clothing and shoes for maintenance work Before you wear jewellery and loose clothing think of your safety General In order to ensure the proper and safe working of the boiler for a long period of time it should be inspected at least once a year The following operations should be carried out for a more extensive description of these opera tio ns see 8 5 Replace the ignition and ionisation electrodes Clean the fan impeller Clean the boiler condensate bottle trap and the drain pipe Clean the gas filter if there is one After removing the casing you can look at the front side with a sight glass at the ignition and combustion flame picture Test the boiler combustion for CO and CO and if necessary correct the same at minimum load and at full load Measure the water temperature difference At as a measure ofthe flow rate Check the water pressure Inspect the water quality hardness and chloride contents Clean the casing on the outside and ensure that it looks clean again Doc653 30CVo2A 27 8 3 Procedure a Switch of the electrical supply to the boiler b Close the gas valve firmly In order to carry out the following work it is necessary to first remove the outer casing The ignition and ionisation electrodes are installed on the front side of the boiler Remove the spark plug caps and inspect the same for possible damage such as
28. he control panel The boiler pump of the types 100 and 120 will be delivered separately and can be directly connected to the return connection of the boiler The capacity and the head of the pump are adequate to overcome not only the boiler resistance but also some system resistance see table 1 In the types 45 65 and 85 the pump has three stage modulation depending on the load Condensate drain 13 The boiler is equipped with a bottle trap This bottle trap is located on the bottom side of the ap pliance and can be easily filled with water Frame 14 The frame is the load bearing part of the boiler All the components are installed on it Casing 6 The casing can be removed easily as one unit To do this unscrew the 8 screws found on the top and the bottom of the casing Electrical equipment This comprises the control system and safety devices of the boiler The connection terminals are installed in a fully sealed enclosure behind the control panel 21 This panel can be tilted through 90 after removing the control panel bolt This provides access to all the electrical connections without the need to remove the casing Boiler control If heat is required the boiler will start if all necessary conditions have been fulfilled and no safety devices have been triggered This heat requirement will arise if The flow temperature of the boiler is less than the required flow temperature The manual option has been selected using selecto
29. ion of principal components Boiler control Safety aspects Safety Delivery and transport Delivery Packaging Transport Installation Regulations Installation area General Installation Ventilation Connections Gas connection Electrical connections Water connections Flue gas outlet and air inlet Connection possibilities Air inlet pipe Flue gas outlet Flue Condensate drain Hydraulic system Water flow Flow and resistance Pump characteristics Shut off valves Valves Water flow protection device Water pressure Operating pressure Boiler expansion vessel System expansion vessel Water pressure protection device Doc653 30CVo2A 10 11 14 15 16 18 19 20 5 43 5 4 4 Water temperature Water quality Operating instructions Operation Controls Boiler module KM628 Fault signals Setting into operation Switching off the appliance Warnings Commissioning General Commissioning Maintenance Safety General Procedure Cleaning the burner and the heat exchanger Cleaning the strainer of the gas combination block lonisation measurement Service Conversion formulae and factors Doc653 30CVo2A 20 21 22 23 25 26 27 28 29 R30 Technical data Type R30 45 R30 65 R30 85 R30 100 R30 120 Nominal heat output 80 60 C kW 5 6 39 2 8 3 59 2 15 6 77 8 17 6 88 2 21 9 109 8 Nominal heat output 40 30 C kW 6 3 43 0 9 2 65 0
30. ionisation measurement a micro ammeter with a measuring range of 0 200 ADC should be fitted in the ionisation circuit The ionisation protection can be checked in this manner The rated ionisation signal is from 6 to 25 pA The minimum ionisation signal is 2 8 pA 8 7 Service The Stokvis Service department is always available to provide you with service and maintenance 28 Doc653 30CVo2A 9 Conversion formulae and factors Formulae 20 9 measured O CO 2 X117 5 20 9 measured CO x 20 9 0 20 9 2 11 7 11 796 CO is the maximum CO percentage that is generated by stoichiometric burning of G20 natural gas H gas Excess air N N 20 9 20 9 measured O X 0 914 or 117 N 1 1 x0 914 a measured Conversion factors For NOx N23 1 ppm 2 05 mg m 21 759 mg kWh 0 498 mg MJ For CO N21 1 ppm 1 24 mg m 21 064 mg kWh 0 298 mg MJ Example Measured values for an environmentally friendly unit NOx 15 ppm CO 10 What is the value for NOx according to the most usual standard in mg kWh for N 1 0 209 10X 20 9 _ 3 20 9 3 NOx for N 1 15 0X 1 17 17 6ppm 17 6x1 759 30 9 mg kWh Ww Kcal h Btu h 1 0 86 3 41 1 163 1 3 97 0 293 0 252 1 Table 13 Conversion factors Doc 53 30CVo2A 29 30 1 kcal 4 187 kJ 1kWh 23 6 Mj Efficiency at the flue gas side The difference between gross and nett calorific values is the heat
31. m the installations Doc653 30CVo2A Do not place any objects on the boiler Keep a safe distance from the hot water connection and the flue due to the danger of burns Before starting with any maintenance and service work shut off the electrical supply and close the gas valve to isolate the gas supply Check the entire installation for leakages after completing maintenance and service work In order to prevent accidents please refer to the general safety requirements in addition to the information contained in this technical documentation All parts of the casing should be in place Casing parts may only be removed for maintenance and service purposes After carrying out main tenance and service work replace all the panels Safety devices The installation should never be switched on with the casing panels removed or the safety de vices disabled Instructions and warning stickers Instruction and warning stickers affixed on the appliance should never be removed or covered up and should be maintained in a legible condition throughout the life of the appliance Immediately replace damaged or illegible instruction and warning stickers Modification The appliance may only be modified with the written permission of the manufacturer Danger of explosion While doing work in the boiler room follow the applicable rules and regulations entitled Working in Areas Subject to Danger of Explosion Installation The appliance should be i
32. n slope can be manipulated with a parallel displacement to the desired flow temperature of the boiler Time controlled hot water re circulation pump Pump kick function DCF receiver for internal clock optional receiver required Communication over a CAN bus Integrated relay and sensor test Can be used in stand alone operation KKM This is a boiler cascade manager with which up to 8 boilers can be connected in cascade and an extra on off boiler can be operated The KKM also has the same functional features as the E6 1111 Connecting terminals Terminal Description La N Earth Supply for the boiler should be installed with 6A fuse protection If miniature circuit breakers are used these should have C Rated characteristics 1 3 Lockout circuit 230 Vac from boiler 1A If the connection between the two ter minals is broken the boiler will immediately go into a lockout condition and will remain out of operation until this connection is restored and has been reset using the lockout reset button 4 5 On Off By connecting the two terminals to each other the boiler is switched from the standby mode to the operating mode and can start when there is a heat requirement These terminals can be used for thermostatic functions for the boiler If the circuit is interrupted the boiler goes into the stand by mode except for hot water preparation 6 7 A hot water temperature sensor can be connected to these terminals These are recognised automatically b
33. nstalled by a recognised installer in accordance with applicable national and local standards and specifications Follow all the safety instructions precisely Operation In case of a gas leakage switch off the boiler and close the gas valve Open doors and windows and notify the relevant authorities When the appliance is restarted follow the user instructions Technical specifications The specifications contained in this technical documentation should not be exceeded 4 Delivery and transport 4 1 Delivery The boiler is delivered fully assembled tested and packed Check the boiler for damage after receipt Check whether the items delivered are correct and in accordance with the items ordered Doc653 30CVo2A 9 10 Pi a Packaging The boiler is delivered in suitable cardboard packaging The types 45 65 85 and 100 can be stacked up till two pieces It s not allowed to stack up the type 120 Transport Regarding transportation refer to the technical data for dimensions and weights The packing should only be removed after transportation or remove the panels before transpor tation This is in order to prevent the panels from getting damaged Moving Each boiler is packed in its own carton which has hand holed at both sides for lifting purposes Access requirements The dimensions of the boiler are such that all the boiler types can be transported through a door opening of 60 cm Mounting Install the Stokvis
34. ntion If the situation lasts for more than 6 minutes or if it occurs more than twice within 6 minutes the boiler will go into a lockout fault and remain out of operation until this connection is restored and is reset using the reset button ST 11 1 11 2 Control for the hot water primary pump 230 Vac from boiler 1A of which termi nal 11 2 is the phase L wire and terminal 11 1 is the neutral N wire Water connections It is recommended that the flow and return pipes are securely fixed with brackets This prevents damage and makes maintenance easier The boiler is an instantaneous boiler and is not suitable for use in open vented systems In such cases a plate heat exchanger should be installed with which system isolation can be achieved The capacity and head of the internal boiler pump is sufficient to overcome not only the boiler resistance but also some system resistance see table 1 It is recommended that manually operated valves should be installed between the water connec tions and the installation In order to limit standby losses further a motorised valve is sometimes installed in the flow or return pipe work or a mechanical non return valve may be used for this purpose Standby losses can be further limited by switching off the boiler via the on off control circuit Flue gas outlet and air inlet Connection possibilities During installation a choice can still be made between a room sealed and an open versi
35. of the appliance Check the built in pump Check the boiler at full load Start the boiler Allow the boiler to run at full load and stabilise around 3 minutes At full load the following settings should be checked and corrected if necessary Reference value for full load Reference value for CO Types R30 45 R30 65 R30 85 and R30 120 8 8 0 2 for natural gas G20 G25 9 8 0 2 for propane G31 Type R30 100 9 4 0 2 for natural gas G20 G25 10 4 0 2 for propane G31 Reference value for CO Types R30 45 R30 65 and R30 85 lt 50 ppm for natural gas G20 G25 lt 70 ppm for propane G31 Types R30 100 and R30 120 lt 75 ppm for natural gas G20 G25 100 ppm for propane G31 Measure the gas pressure before the gas valve At full load this must be at least 17 mbar for natural gas and 30 mbar for propane If there are several boilers this pressure should be meas ured with all the boilers operating at full load Check the water side temperature difference At between the flow and return connections of the boiler The At should be between 15 and 25 K at full load Check the boiler at minimum load Set the boiler back to minimum load At minimum load the following settings should be checked and corrected if necessary Reference value for minimum load Reference value for CO Types R30 45 R30 65 R30 85 and R30 120 8 2 0 2 for natural gas G20 G25 9 0 0 2 for propane G31 Type R30 100 8 8 0 2 for natural gas G20 G25 9
36. on The standard eccentric connection can also be easily changed into a concentric connection The flue gas discharge outlet and air intake system should be installed by a recognised installer according to applicable national and local standard and specifications e Type B23 Open type appliance without draught stabiliser air supply from the room flue gas discharge outlet above the roof Type C13 Room Sealed appliance connected to a concentric air supply flue discharge through the wall Type C33 Room Sealed appliance connected to a concentric air supply flue discharge through the roof Type C43 Room Sealed appliances in cascade connected to a common concentric air supply flue dis charge at the appliance Doc653 30CVo2A Type C53 Room Sealed appliance connected to a separate air supply and flue discharge pipe opening into different pressure areas Type C63 Room Sealed appliance sold without related connecting and or discharge fittings e Type C83 Room Sealed appliances in cascade connected to separate air supplies but common flue dis charge through the roof 5 3 4 2 Air inlet pipe 5 3 4 3 The air supply pipe may be single wall smooth or flexible and be made of plastic aluminium e stainless steel Always consider the large resistance when using flexible material Always consider condensate formation due to the suction of cold air Type Diameter of air inlet D1 mm R30
37. on of internal standard or external room sensor option Doc653 30CVo2A Adjustable response of the flow temperature to sensed room temperature Calibration of the room sensor Delay to flow temperature compensation due to external temperature up to a maximum of 3 hours Holiday Programme Frost protection system based on external temperature or room temperature Remote activation via telephone if no external room sensor fitted external relay required Optimisation of compensation slope based on room temperature and external temperature with optimum start time adjustment Hot water Anti legionella bacteria function 659C Option of switching off internal room sensor 2 wired communication scom bus Display in 6 different languages External display of KM628 functions with display of status operating hours number of starts degree of modulation and temperatures E6 1111 This is a control system for the weather dependent control of two secondary heating circuits In addition a hot water circuit can also be controlled at two different Set Points All the settings can be made separately for each secondary circuit This E6 controller can be further extended with an optimisation controller system for each secondary group BM The weather dependent control of the boiler is done indirectly by the E6 1111 There are the following additional features to the BME The maximum flow temperature can be set for each heating circuit The compensatio
38. r limit to the return water temperature If this temperature is low condensate will be formed which is removed via the discharge system Controls Depending on the heat requirement of the boiler the load should be modulated between 14 and 100 Below 14 load the boiler operates on off based on temperature Doc653 30CVo2A 21 22 6 3 Boiler module KM628 Lid closed 56 43 a el Ufo amp A Fig 6 Boiler module 1 Operating mode Stand by Automatic operation winter position Hot water operation summer position amp Service operation constant load Rotary selection switch operating mode Fault indicator Actual flow temperature Error code flashing Operating status Night off 3 Day on operation Flashing Burner in operation 7 Service position amp I Service operation at minimum burner load P17 II Service operation at maximum burner load P9 Aun BRWN Lid open WP WN XN CON Os Control functions with the lid in the closed position With the lid in the close position and by operating the rotary selection switch the operating mode can be changed to iden mum 2 3 5 ORTO ALARWRESET 4 i 1 Parameter indication P1 Actual required flow temperature P2 Actual required hot water temperature P3 Required flow temperature Ps Actual external temperature P6 Actual flue gas temperatur
39. r switch set to amp I or amp I The frost protection has been triggered independently of the operating conditions O amp I or amp I The integrated temperature controller adjusts the heat input inside the boiler by changing the fan speed so that the desired temperature is reached and kept at a constant level Depending on the quantity of air displaced by the fan a specific quantity of gas will be added As a result the boiler capacity can be modulated seamlessly and the heat requirement can be accurately monitored If the flow temperature rises above the desired level together with any hysteresis the boiler will switch off The boiler will start again as soon as the flow temperature falls below the desired level Doc653 30CVo2A 7 2 4 Safety aspects The following safety devices are installed on the boiler Temperature monitoring system High limit temperature monitoring system STW Limit temperature monitoring system STB both are adjustable Frost protection system Using an external sensor if the external temperature falls below o C Based on the flow temperature if this is below 5 C and or the domestic hot water tempera ture is below 10 C Flame monitoring by means of ionisation measurement Fan speed monitoring Flue gas temperature monitoring Flow monitoring using a combination of flow water temperature and flue gas sensor readings If one of these safety systems is activated the boiler will go to an interlocking
40. rch Stokvis is again in a position to offer solutions for the most challenging heating requirements The supplier Stokvis will be happy to provide you with advice or more information concerning our products You will find our contact details on the cover of this documentation You can of course always obtain further information via www stokvisboilers com This document The present documentation has been prepared with the following target groups in mind The technical consultant The installer The maintenance technician The user Stokvis has opted to make the technical documentation as comprehensive as possible in the form of this book in order to ensure that these target groups have all the information they need As the supplier we would be happy to help you in connection with any additional information that you may require This document covers the following aspects relating to the boilers General description Technical specifications Requirements for design and installation Maintenance instructions The operating instructions for the user have been affixed to the appliance itself You will also find them in chapter 6 Service The Stokvis Service Department is always ready at hand to commission the appliance and provide maintenance and service Please refer to the cover for details Doc653 30CVo2A 3 15 General restrictions Stokvis products should always be used installed and maintained in accordance with the statu tory
41. requirements specifications and standards applicable to these installations All the data information and suggestions concerning its products provided by Stokvis are based on careful study However the use installation and operation of the same are outside the control of Stokvis and neither Stokvis nor any other organisations associated with it accept any liability for the same Changes may be incorporated without prior notice Stokvis accepts no obligation to adapt previ ously delivered products to incorporate such changes 2 Description 2 1 CE General The Rendamax R30 wall mounted boilers are environmentally friendly gas fired heating boilers with a modulation range between approximately 1496 and 10096 of their maximum output types 85 100 and 120 20 to 100 The R30 series consists of three models of boiler with an output range of 43 to 120 kW The appliances have low NO and CO emission which satisfy the most stringent environmental requirements The R30 series has received CE Approval for all relevant European countries and has been regis tered under the Product Identification Number 0063B03192 The boilers may be used on both open category B23 as well as room sealed category C13 C33 C43 C53 C63 or C83 systems As standard the boiler is delivered fully wired fully assembled and tested Working principle and design Air is drawn in as required via a speed controlled fan The zero pressure controller of
42. ropriate addition and use of chemicals water softeners oxygen components de aerators aerators and water filters increase the chance of faults Corrosive elements in some additives may corrode the system giving rise to leakages undesir able deposits often damage the boiler heat exchangers In connection with the hardness of the water a distinction should be made between the following a Temporary hardness This is also termed carbonate hardness Deposits are formed at higher temperature and can be removed easily b Permanent hardness Minerals for example calcium sulphate in the water that are deposited due to very high sur face temperatures The water hardness is generally expressed in terms of ppm and is sub divided into the follow ing Doc653 30CVo2A Very soft 50 ppm Soft 50 160 ppm Moderately hard 160 250 ppm Hard and very hard 250 ppm A The system should contain soft to medium hard water with the water hardness that does not exceed 250 ppm at a flow temperature of 80 C and At 20 K Before supplying water the hardness and chloride value of the system water should always be determined The chloride value should never exceed 200 mg l If the chloride value does exceed this value the cause should be determined Compare the chloride value of the supply water and the central heating system water If this content is much higher and if no materials containing chloride have been adde
43. signs of arcing and contamination replace the same if necessary If the boiler is in a dusty environment the fan impeller may get dirty This will reduce the air quantity delivered and may unbalance the impeller Clean the impeller with a brush Clean the condensate bottle trap The bottle trap beaker can be easily unscrewed from the bot tom of the boiler Clean the same Clean the gas filter if any Unscrew the bolts of the gas filter cover Carefully remove the filter element Clean the filter by shaking it In the case of heavy contami nation replace the filter Install the filter and tighten the cover in place Check for leakages Check the combustion Calibrated measuring equipment should be used to carry out gas air and flue gas measurements 8 4 Cleaning the burner and the heat exchanger The burner can be cleaned on both sides with a hard brush after dismantling The heat exchanger can be washed clean on the flue gas side If the heat exchanger is heavily contaminated for example soot deposition the heat exchanger may be cleaned with a brush and water The heat exchanger can be cleaned on the water side using suitable cleaning media For advice concerning the media that are suitable contact the Service department of your supplier 8 5 Cleaning the strainer of the gas combination block The strainer in the gas control combination block can be cleaned First dismantle the gas valve 8 6 lonisation measurement For carrying out an
44. table gives the flue gas data for all the types Type Maximum flue gas tem Quantity offlue gas at Maximum permissible flue perature at full load full load resistance C m3 h kg s mbar R30 45 70 74 0 020 1 4 R30 65 70 113 0 031 1 4 R30 85 70 149 0 041 1 4 R30 100 70 168 0 046 1 4 R30 120 70 209 0 058 2 0 Tables flue gas data Load 100 Flow temperature 80 C Return temperature 60 C 5 3 4 4 Flue Flue length Since the boiler is equipped with a premix burner with a fan an overpressure is created in the boiler This overpressure is sufficient to overcome the resistance of the burner the heat exchang er and the chimney The back pressure outside the boiler depends on a the resistance of the flue pipe b the degree of cooling of the combustion gases c the resistance of the discharge outlet The degree of cooling of the combustion gases depends on the following a the insulation value of the flue b the ambient temperature c the flue system and outlet There is a maximum overpressure of around 1 4 mbar 140 pa for the types 45 65 85 100 and 2 0 mbar 200 pa for the type 120 in the boiler for the flue gas discharge system Calculation of diameter and length For the calculation and control of the inner diameter of a discharge system with mechanical dis charge please refer to the applicable national and local standards and regulations Doc653 30CVo2A Length of flue in m
45. the gas valve measures the under pressure in the venturi and modulates the gas in response to this pres sure from the fan The gas air is then thoroughly mixed in the correct ratio and fired directly into the burner A temperature controller compares the actual water flow temperature to the desired water tem perature The controller interprets the load required and adjusts the fan speed The fan sends a speed feed back signal and the controller re adjusts the speed as required The mixture of gas and air that is formed is then conveyed through the cylindrical stainless steel burner for combustion The heat exchange takes place in a double heat exchanger block The first heat exchanger is lo cated immediately next to the burner while the second heat exchanger is connected downstream condenser Both heat exchangers consist of several smooth pipes in the form of a coil The two heat exchangers are connected to each other using water distribution manifolds The water is circulated by the boiler pump This pump will be in the boiler for types 45 65 and 85 and external for the types 100 and 120 separate delivered The R30 boiler has a low water capacity Due to this rapid changes of the water temperature can be achieved It can be used without any return temperature protection The installed pump pro vides the water flow rate required This pump has three stage modulation types 45 65 and 85 Doc653 30CVo2A Application possibilities The
46. y the boiler controller when the supply voltage is switched on The reading from this sensor is used for controlling the hot water temperature 8 9 External flow temperature adjustment A o 5 Vdc 10 to 90 C analogue signal can be applied at these terminals If the voltage is less than 1 Vdc it will change over to the internal set flow temperature set at P1 Doc653 30CVo2A 13 14 5 3 3 5 3 4 5 3 4 1 10 11 Connection terminals for the 2 wire bus signal scom bus Pay attention to the polarity namely terminal 10 is earth and 11 is positive ST 1 1 1 2 An OK signal is available from these terminals rated at 230 Vac 1A This circuit is closed in normal operation and will be open if more than 2 identical faults occur within 6 minutes the display will show an error code with a 3 appearing above it or if a fault remains for more than 6 minutes ST 2 1 2 2 An outdoor sensor can be connected to these terminals The automatic control unit of the boiler will automatically detect this connection when the supply volt age is switched on The reading from this sensor is used for frost protection and for weather dependent control of the flow temperature of the boiler when fitted with the optional BME E6 1111 or KKM ST 9 3 9 4 Interlock circuit 230 Vac from boiler 1A If the connection between the two terminals is broken the boiler will go into a fault condition and remain out of operation until this connection is restored Atte
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