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Ariston - microGENUS

1. we Y ka A 7 SC4 Fic 1 33 y PO 21eps Fic 1 34 2 0d 7 AN a Fic 1 35 11 Removing the safety valve Removing the main circuit flow switch 1 Loosen nut Z Fic 1 36 2 Unscrew and remove the valve Fia 1 37 1 Remove the cable of the main circuit flow switch B1 Fic 1 40 2 Remove the screws C1 Fic 1 41 3 Remove the main circuit flow switch FiG 1 36 Fic 1 40 FiG 1 37 Removing the automatic air vent 1 Unscrew valve top A1 Fia 1 38 2 Remove valve Fig 1 39 Fic 1 41 12 B063 Removing the pump 1 Remove the U clip D1 Fic 1 41 2 Remove the retaining clip E1 Fic 1 42 3 Remove the U clip F1 Fic 1 43 4 Release the nut G1 Fic 1 44 5 Remove the pipe H1 Fic 1 45 6 Remove the screws 1 Fic 1 46 7 Remove the pump Fia 1 47 y d 6 zs LU Ia s 3 aa
2. 13 Fic 2 13 954315 CMP1 FFI 1 CN 302 1 CN303 FUSE 2A FUSE N gt 1 2 3 OFF a o a m 3 oiv 2Ag N e eo N o x o o o v 29 2 13 WATER Circuit DIAGRAM Fi 2 14 4 LEGEND B lt 1 Fan n 2 Main Heat Exchanger _ b 3 Overheat Thermostat 17 20 4 Burner 1 E 5 Ignition Electrodes O 19 6 Detection Electrode Es NS 2 P WALLE VUL A AA AA E MEI e Probe 3 CTI A A SW ICR N 10 Automatic
3. Fic 1 18 FiG 1 19 B063 Removing the air pressure switch 1 Disconnect the electrical connections K and silicon pipes L from their connection points Fic 1 20 2 Remove screws M on the top of the sealed chamber FiG 1 21 3 Unscrew to remove switch from the plate Fic 1 22 Fic 1 20 Fic 1 21 Removing the fan O Fic 1 23 Fic 1 24 3 Remove screws R FiG 1 25 4 Remove fan and mounting plate Fia 1 26 Fic 1 23 1 Disconnect electrical connections N and silicon pipes 2 Remove screw P and remove the fan collar clamp Q Fia 1 24 Fic 1 22 B063 R R Z FERRE a Fig 1 25 1 LP FiG 1 26 wa A 96 tif 1 4 SERVICING AND REMOVAL OF THE GAS VALVE Setting the gas pressures VG001Aa VG001Ac VG001Ab l D Setting the minimum and the maximum power of the
4. GAS REQUIREMENTS NATURAL GAS G20 BUTANE GAS G30 PROPANE GAS G31 Gas rate max 2 70 m3 h 2 01 Kg h 2 00 Kg h Gas rate min 1 16 m3 h 0 87 Kg h 0 85 Kg h Inlet pressure 20 mbar 28 mbar 37 mbar Burner pressure max 11 0mbar 27 7 mbar 35 5 mbar Burner pressure min 2 0 mbar 6 0 mbar 7 3 mbar Burner jets 12 x 1 30 12 x 0 77 12 x 0 77 GAS REQUIREMENTS NATURAL GAS G20 BUTANE GAS G30 PROPANE GAS G31 Gas rate max 3 15 m3 h 2 34 Kg h 2 31 Kg h Gas rate min 1 26 m3 h 0 94 Kg h 0 93 Kg h Inlet pressure 20 mbar 28 mbar 37 mbar Burner pressure max 11 0mbar 27 7 mbar 35 5 mbar Burner pressure min 1 6 mbar 4 6 mbar 6 0 mbar iL LL z co N A Mul o m iL LL z N N A Li o E Burner jets 14 x 1 30 14 x 0 77 14 x 0 77 TB012A a Soft light Adjustment 10 Remove the pipe from the pressure gauge and connect screw C to the pressure outlet in order to seal off the gas 11 Carefully check the pressure outlets for gas leaks valve inlet and outlet IMPORTANT Whenever you disassemble and reassemble the gas connections always check for leaks using a soap and water solution Max Heating Adjustment VRO15A eps Removing the spark generator 1 Disconnect ignition
5. B063 microGENUS 23 27 MFFI 26 ARISTON art No 998616 573521 998077 573520 997147 997077 569236 998613 571547 998099 998940 998424 574279 998645 Key 2 gt o E61 468 164 282 E61 475 164 225 U Z c1 E25 427 E61 429 164 338 Temperature probe C H W E61 478 E24 077 E61 479 E61 482 E61 483 E25 529 E61 848 E61 485 E61 490 E61 881 33 AB E61 519 P C B CMP1 FFI 33 CD 998836 999091 999599 998947 999245 573989 571651 999397 998894 997206 E61 520 E61 530 E61 967 E25 425 E61 546 998893 998618 998669 998887 E61 547 E61 549 E61 972 E61 974 E26 767 571646 573295 573825 573172 E03 818 E26 657 E26 378 E61 565 E61 567 E61 569 E25 582 E61 647 E61 648 Heating spring kit E61 649 E61 650 E61 652 E61 654 E61 656 E61 660 E62 030 E24 077 E24 077 998622 998624 998941 997029 998490 998718 998975 998974 998644 998643 353 354 AB 354 CD 999207 571547 571772 571771 571770 998172 998716 998717 372 373 E24 076 Spring main flow switch 374 i E24 075 E61 663 Burner jet 1 25 full kit Natural ga 382 E61 667 m ITI ep N o o oO e O1 O1 ojo ce ce ce ce ojo c c co c TM EI S e S g 9g oO o o 2 S 33 AB 33 CD 52AB 5200 66CD 74AB 74CD 75A 75B 75C 79D 76AB 76CD 98 99 321 353 354 A
6. B063 Removing the D H W temperature sensor N T C 1 Pull off the electrical connector Q1 and unscrew the sensor probe using a suitable spanner Fic 1 57 23 4 ait bi a 1 a v pee Fic 1 57 Removing the divertor valve actuator 1 Unplug the electrical connector R1 Fic 1 58 2 Release the retaining clip S1 and remove the divertor valve actuator lt An A Fia 1 58 Removing the D H W flow switch 1 Unplug the electrical connector T1 Fic 1 59 2 Release the retaining clip V1 and remove the D H W flow switch 15 1 6 ACCESS TO THE CONTROL SYSTEM Checking the fuses 1 Remove the inspection cover on the reverse of the control panel Fia 1 60 2 Remove the fuses Fic 1 61 Removing the time clock 1 Unplug electrical connection W1 from the clock Fic 1 62 2 Remove the screws W2 see fig 1 63 3 Remove the clock from the panel see fig 1 64 72 eps Fic 1 60 O s OK 61 eps FIG 1 61 sl Eea JFic 1 62 z v 24 a v gat A Ve 1189 jpg F
7. P 32 eps B063 13 Removing the pressure gauge 1 Remove the U clip J1 and remove the pressure gauge coupling Fic 1 48 2 Push the pressure gauge through the control panel from the rear Fic 1 49 Fic 1 48 Fic 1 49 27 eps Removing the expansion vessel 1 Loosen nuts K1 and remove the gas pipe Fic 1 50 2 Loosen nut L1 Fic 1 51 3 Remove back nut M1 Fic 1 52 4 Remove the expansion vessel Fia 1 53 Fic 1 50 57 eps Fic 1 51 Fic 1 52 4 59 eps 3 Fic 1 53 B063 Removing the overheat thermostat 1 Disconnect the overheat thermostat electrical connections N1 Fic 1 54 2 Then remove the thermostat from its mounting by releasing the securing clip Fic 1 55 p Fia 1 54 s FiG 1 55 Removing the heating temperature sensor N T C 1 Pull off the electrical connector P1 and unscrew the sensor probe using a suitable spanner Fic 1 56 FiG 1 56
8. This will help to improve our service TABLE OF CONTENTS 1 GENERAL INFORMATION page 4 Technical Information page 5 Control Panel page 6 2 OPERATING INSTRUCTIONS page 8 3 USEFUL INFORMATION AND TROUBLESHOOTING page 14 4 MAINTENANCE page 16 5 CHANGE oF Gas TYPE page 16 6 TIME CLock page 17 IMPORTANT Please read this manual carefully For additional information please consult the Installation and Servicing Instructions Make sure to keep the manuals provided with the appliance so that they can be used by the end user installer or our authorised engineer 1 GENERAL INFORMATION MTS GB Limited support the Zeze amp mar initiative Your installer will give you and show you how to use a logbook which will give you important information about your boiler and heating system Please have this logbook to hand whenever you contact a service engineer or us All CORGI Registered Installers carry a CORGI ID card and have a registration number Both should be recorded in your boiler Logbook You can check your installer is CORGI registered by calling CORGI direct on 01256 372300 This is a combined appliance for the production of central heating C H and domestic hot water D H W This appliance must be used only for the purpose for which it is designed The manufacturer declines all liability for damage caused by improper or negligent 4 use Do not allow children or inexperienced persons to
9. rear 998600 Panel combustion chamber L H side 998964 Panel combustion chamber L H side 998639 Panel insulation side 997206 Thermostat overheat 998583 Fixing spring overheat thermostat 998620 Main exchanger 998893 Main exchanger 998618 Burner 12 ramp natural gas 998669 998887 Burner 12 ramp LPG Burner 14 ramp natural gas 998939 Burner 14 ramp LPG 571646 Secondary exchanger p type 23kW 573295 Secondary exchanger p type 27kW 573825 O Ring secondary exchanger 998629 Cable 3 way valve motor 573172 Safety valve 1 2 3 bar 573528 Gasket 1 2 998019 Pipe safety valve outlet 573576 Compensation tube 573325 Rivet 569443 Silicone seal 572138 Burner jet washer 998433 Burner jet NG 1 30 998434 Burner jet LPG 0 77 998729 Pipe gas valve 998732 Pipe C H return 997153 U clip 998604 Reset button 998571 Reset button insert 999148 Selector button comfort 998579 Spindle comfort 999406 Cable time clock 998862 Cable detection electrode 569720 Blind grommet 998517 Gasket 998623 Electrode Ignition R H 998622 Electrode Ignition L H 998624 Detection electrode 998147 Ignition electrode cable rubb
10. TOWER FLUE COMPONENTS Morley Road Tonbridge Kent TN9 1RA The minimum acceptable spacing from the terminal to obstructions and ventilation openings are specified in Fic 2 6 TERMINAL POSTION mm A Directly below an open window or other opening 300 B Below gutters solid pipes or drain pipes 75 C Below eaves 200 D Below balconies or car port roof 200 E From vertical drain pipes and soil pipes 75 F From internal or external corners 300 G Above ground or below balcony level 300 H From a surface facing a terminal 600 From a terminal facing a terminal 1200 J From an opening in the car port e g door window into dwelling 1200 K Vertically from a terminal in the same wall 1500 L Horizontally from a terminal in the same wall 300 The boiler is designed to be connected to a coaxial flue discharge system In addition it is also possible to use a split twin pipe system by fitting a special adaptor to the flue connector and using the aperture for the air vent intake located on the top part of the combustion chamber To utilise the air intake it is necessary to 1 Remove the bottom of the air intake by cutting it with a suitable knife see Fic 2 8 2 Insert the elbow into the air intake until it reaches the lower end There is no need to use gaskets or sealing componds The components marked in Fic 2 9 are present or absent dependi
11. circuit flow switch PUMP PROTECTION ES 2 Check re m place ACTIVATED connection cable 3 Check replace P C B 1 Check replace air INTERNAL pressure switch P C B PROTECTION ES gt 2 Check if reset button 3 ACTIVATED is jammed 3 Check replace flame detection electrodes NO J 1 Check replace connection cable T LANG NO gt 2 Check replace P C B 3 Check replace air pressure switch YES 4 1 Replace fan gt FC004Ac 20 B063 IS THE AIR PRESSURE SWITCH ACTIVATED IS FLUE DISCHARGE NORMAL IS THE BURNER ALIGHT HAS THE BOILER SAFETY SHUTDOWN BEEN ACTIVATED CHECK AP ON TEST AP 1 2 mbar Check A P switch cable PRESSURE INTAKE AP lt 1 2 mbar 2 Check replace A P switch 3 Check replace P C B 1 Check exhaust discharge 2 Check venturi amp pipes 3 Check fan efficiency p 1 Check replace ignition electrode gt 2 Check ignition cable 3 Check spark generator 4 Check ignition electrode cable 5 Check replace P C B 1 Check power supply of gas valve gt 2 Check replace P C B 3 Check efficiency of gas valve 4 Replace gas valve 1 Check if flame strikes detection electrode 2 Check soft light gas pressure 3 Check replace detection electrode 4 Check rep
12. e GREY e ORANGE GREENYELLOW V4043H VALVE Regler Sunvic SP 50 100 Link L 3 Symphony Sonata Sunvic DHP 2201 Towerchron FP Towerchron 2000 Randall 922 972 Sunvic ET 1451 Link L 2 5 Switchmaster Link 2 3 6 Link 1 5 4 7 9 Towerchron MP Link 1 4 6 11 Randall 3020 P and 3060 ACL LS522 LS722 4 PROGRAMMER 3 1 T6360B ROOM THERMOSTAT li RWB2 Glowworm Mastermind Landis amp Gyr RWB20 Microgyr ST 6400 ST 6300 ST 6200 Honeywell ST 699B 1002 Drayton Tempus 7 Link L 5 8 Horstmann 425 525 527 Link L 2 5 Landis amp G Potterton EEUU Potterton Miniminder Link L 5 EP2001 3001 Randall 102 102 E ppn 410 Form 1 Randall 701 702 Lin Link L 6 5 Sangamo M5 Randall 4033 Link 1 6 Link 1 6 If a room thermostat is not requied on Zone 1 insert a link between 4 5 on the junction box If a room thermostat is not requied on Zone 2 insert a link 240V between 6 8 on the junction box MAINS INPUT 3 AMP 22 7 2 WIRING DIAGRAM FOR CONNECTION TO AN ARISTON UNVENTED CYLINDER BOILER ELECTRICAL SUPPLY CABLE Remove internal time clock plug from the the P C B then connect TYPICAL room stat terminal block on the JUNCTION BOX reverse of the boiler control panel sd see section 2 10 to 9 10 on the junction box Based on
13. 0 2 l min 13 6 VYmin 9 7 l min 2 6 2 6 V Hz 230 50 230 50 Ww 140 155 IP X4D X4D mbar 20 25 20 25 mbar 30 37 30 37 ON CONTROL PANEL FR025A LEGEND A On Off knob K Central heating temperature B Domestic hot water temperature L E D yellow adjustment knob L Time clock C Central heating selection M Heating system pressure gauge winter and temperature adjustment knob D On Off L E D green E Fume sensor L E D yellow F Ignition failure lockout L E D red G Economy Comfort mode selection knob H Ignition failure lockout and or overheat reset button l Overheat L E D red J Low system water level L E D red 2 OPERATING INSTRUCTIONS CAUTION Installation start up adjustments and maintenance must be performed by a competent person only in accordance with the current Gas Safety Installation amp Use Regulations and the instructions provided Improper installation may cause damage or injury to individuals animals and personal property for which the manufacturer will not be held liable To ensure efficient and safe operation it is recommended that the boiler is serviced annually by a competent person If it is known or suspected that a fault exists on the appliance it must not be used until the fault has been corrected by a competent person 8 HELPFUL SUGGESTIONS To get the most out of your boiler we have provided y
14. Condensation Forming Piping not insulated Piping insulated Q 41 restrictor 47 41 restrictor 47 NONE NONE NONE NONE Risk of Condensation Forming Piping not insulated Piping insulated 41 restrictor 47 41 restrictor 47 i i v Risk of Condensation Forming Piping not insulated Piping insulated 41 restrictor NO restrictor 41 restrictor NO restrictor NONE NONE NONE NONE Risk of Condensation Forming Piping not insulated Piping insulated 41 restrictor NO restrictor 41 restrictor NO restrictor Maximum Extension Exhaust Air Maximum Extension Exhaust Air Maximum Extension Exhaust Air L Sum of the total length of exhaust air intake piping 11 TwiN PiPE SYSTEMS Fic 2 11 In calculating the lengths of the pipes the maximum length L must also take into consideration the values for the exhaust air intake end terminals as well as 90 elbows for coaxial systems The C52 types must comply with the following requirements 1 The exhaust air intake pipes must have the same diameter of 80 mm 2 The maximum combined flue length is 16 m In this case the minimum length for the air intake pipe is 1 metre the maximum length of vertical exhaust pipe must be a maximum of 12
15. Lock washer 998836 Pump 999091 Pump 998570 L E D 998575 Spindle temperature knob 998603 Control knob 998572 Spindle on off knob 997207 Time clock 999059 Front cover 998824 Control panel 998947 Printed circuit board CMP1 FFI 569711 Nylon bush 10mm 999245 Pressure gauge 998952 Control panel 998953 Cable holder cover 571548 Clip main flow switch 998861 Cable power supply 999153 High voltage wiring 998863 Low voltage wiring 573327 Y piece air pressure 571575 Silicone pipe positive signal 571651 Air pressure switch 573989 Air pressure switch 997203 Support plate air pressure switch 573329 Pressure intake cover 569662 Silicone pipe Gasket adhesive 10x6 Sealed chamber 998565 Cover flue test point 998636 Gasket flue test point 998602 Flue exhaust manifold header 998637 Gasket flue collar 998595 Plug air intake 998648 Cable fan air pressure switch ER200021 1017002001 998943 DESCRIPTION O ring 2 65x10 27 999135 Panel insulation fan 998566 Fixing clamp fan 998601 Fixing plate fan 998894 Fan 999204 Fan 998640 Panel insulation rear 998896 Panel insulation
16. MFFI CN301 CN300 3 8 sa SE017A SF014A 24 B063 4 SHORT SPARE PARTS LIST microGENUS 23 27 MFFI 106 ie Ori 25 29 30 31 code 998940 A codes 998836 MODELS CHARACTERISTICS SERIAL NO VALIDITY MICROGENUS 23 MFFI METHANE 2320005600001 MICROGENUS 23 MFFI LPG 2320005600001 MICROGENUS 27 MFFI METHANE 2320005600001 MICROGENUS 27 MFFI LPG 2320005600001
17. W IS BEING DRAWN Check reset system pressure Check restore gas supply Check replace short circuited heating probe Check replace siezed pump to MUST TIME CLOCK AND OR ROOM THERMOSTAT BE ACTIVATED A Check reset the system pressure 2 Check restore gas supply 3 Check replace short circuited heating probe 4 Check replace siezed pump FOR BOILERS WITH ELECTRONIC ANTI FROST DEVICE PROTECTION IS ACTIVATED YES 4 IF HEATING TEMP IS lt 5 C FOR BOILERS WITH ELECTRONIC ANTI FROST DEVICE __Y PROTECTION IS ACTIVATED IF HEATING TEMP IS lt 5 C FC004Aa 18 B063 IS THE PUMP RUNNING POWER TO THE PUMP DOES THE NO WATER L E D L 7Y ES ILLUMINATE WITHIN 40 SECS 1 Check pump cable 2 Check replace P C B 3 Check main flow main 1 Check if there is air in the System switch operation when 2 Check main circuit flow switch drawing DEW operation 1 Check that the pump rawing SEENA is not stuck 2 Release replace pump 3 Check pressure on the water gauge and fill system to return to 1 bar 4 1 Turn the boiler off then on protection reset 4 4 FC004Ab B063 19 A ES reca IE 1 Check replace main
18. boiler 1 Check that the supply pressure to the gas valve is a minimum of 20 mbar for natural gas 2 To do this remove the screw A Fit the pipe of the pressure gauge to the pressure connection of the gas valve B When you have completed this operation replace the screw A securely into its housing to seal off the gas 3 To check the pressure supplied by the gas valve to the burner remove the screw C Fit the pipe of the pressure gauge to the pressure outlet of the gas valve D Disconnect the compensation pipe either from the gas valve or from the sealed chamber 4 Set the On Off button to position lt T gt and the summer winter switch to the winter position To set the maximum power turn on the hot water tap and allow the hot water tap to run at a rate of about 8 litres minute so that the main burner lights Adjust nut E on the modureg to set the gas pressure displayed on the pressure gauge corresponding to the maximum power see TABLE A page 9 5 To set the minimum power disconnect a supply terminal from the modureg and adjust screw F Turn the screw clockwise to increase the pressure and coun ter clockwise to decrease the pressure displayed on the pressure gauge corresponding to the minimum power See TABLE A page 9 6 When you have completed the above operations turn off the hot water tap re connect the supply terminal to the modureg on the gas valve and
19. code 998613 i0 mw ZO amp eb 333 E iS is e code 998940 SA codes 998836 352 999091 ER200021 1017002001 code 998099 371 E M2 Qf am MODELS MICROGENUS 23 MFFI CHARACTERISTICS METHANE SERIAL NO VALIDITY 2320005600001 MICROGENUS 23 MFFI 2320005600001 MICROGENUS 27 MFFI METHANE 2320005600001 MICROGENUS 27 MFFI 2320005600001 DESCRIPTION Frame 998616 Expansion vessel 998776 Bush 998581 3 8 lock nut 573521 Gasket 3 8 999102 Pipe expansion vessel 998580 Cable holder Hydraulic group support 570717 Spring fastening 998569 Pivot 998589 By pass pipe 998077 O ring gasket 998064 Spring by pass pipe 573520 Gasket 3 4 999103 Pipe flow 997147 Motor 3 Way valve 997077 Fixing clip motor 569236 Temperature probe C H W 998613 Flow group 571547 Diaphragm main flow switch 998099 Main circuit flow switch 998632 Cable temperature probes 999075 D H W flow switch 998940 Return group 998424 O ring 574279 Gasket 998645 Spark generator 997089 Gas valve SIT 845 SIGMA 999162 Pump bracket 998568 Pump plug 997182 Gasket 999100
20. m 3 If elbows are to be inserted into the air intake and or exhaust system the calculation of the overall length must take into consideration the values for each elbow see the FLUE PIPE ACCESSORIES MANUAL 4 The exhaust pipe must protrude by at least 0 5 m above the top of the roof in the event that it is located on the opposite side to the side with the air intake this condition is not obligatory when the air intake and exhaust are located on the same side of the building 2 10 Room THERMOSTAT To connect a room thermostat it is necessary to CONNECTION 1 Open the control panel as indicated in section 3 3 2 Remove the link A from the terminal block on the reverse of the control panel 3 Insert the thermostat cable through the cable grommet and fasten it by means of the cable clamp provided 4 Then connect the thermostat wires to the terminal block 5 If a remote time clock is to be fitted disconnect the integral time clock from the P C B 6 Using a volt free switching time clock connect the switching wires from the time clock following points 1 4 above 7 f using an external time clock and room thermostat these must be connected in series as points 1 7 above Note Only a two wire type room thermostat can be used An anti frost device is built in to the appliance s electronic regulation system 12 2 12 ELECTRICAL DIAGRAM LEGEND wD gt lt AMNDW
21. power for propane gas G31 TABLE A B063 mbar 12 11 _ oo model 23 10 p model 27 9 ms 2 o7 hi t 6 c 5 Da tc 23 m 2 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 2223 24 252627 kW r 4 4 4 o o1 oq poecpe qo po qo 4o aeo3 5 6 7 8 9 10 1 12 13 14 1516 17 18 19 20 21 22 23 kCal h x 1000 OPERATING POWER CG007A mbar 32 30 28 Model 23 26 24 model 27 uU 22 D 2o o 18 Q 46 tc r 14 c 12 ul 10 8 S 6 e 4 2 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 24 252627 kW 1 f f 1 1 1 Ll ba 1 1 1 L 1 L 5 6 7 8 9 10 1 12 13 14 1516 17 18 19 20 21 22 23 kCal h x 1000 OPERATING POWER CGO08A mbar 40 38 36 34 32 25 C Mode 23 ea model 27 u 22 20 18 DB 16 iu 14 Boa 10 u 8 6 E 4 m 2 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 24 25 2627 kW 4 4 po q qeo opo pop qo Xp qo seo T poop o4 qe sq 5 6 7 8 9 10 11 12 13 14 1516 17 18 19 20 21 22 23 kCalh x 1000 OPERATING POWER CG009A
22. pressure in the water mains with consequent water hammer Insufficient radiator temperature check C H temperature probe check by pass check gas pressures 4 FC004Ae 22 B063 3 ELECTRICAL BEREND DIAGRAMS Uo I CcC duomouozzrac ronmuoo l A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 A11 A12 A13 A14 Time Clock Connector Central Heating Selection Winter and Temperature Adjustment Connector for Total Check System Domestic Hot Water Temperature Adjustment Soft light Adjustment Maximum Heating Adjustment On Off Switch On Off L E D Fume Sensor L E D Ignition Failure Lockout L E D Low System Water Level Lack of Circulation L E D Reset Button Economy Comfort Selector Overheat L E D Temperature L E D s Transformer Circulation Pump Relay Fan Relay Gas Valve Relay Motorised Diverter Valve Relay Spark Generator Anti cycling Device Adjustment for Heating Circulation Pump Fan Spark Generator Gas Valve Supply Motorised Diverter Valve Flame Detection Circuit Detection Electrode Main Circuit Temperature Probe Domestic Hot Water Temperature Probe Domestic Hot Water Flow Switch Main Circuit Flow Switch Modulator Air Pressure Switch Safety Thermostat External Room Thermostat Colours Gry Wh Pnk Brn Bl Bik Rd Blk B063 Grey White Pink Brown Blue Black Red Black 23 microGENUS 23 27
23. replace the cap on the screw of the modureg Setting the maximum heating circuit power T To set the maximum heating circuit power place the On Off button to position lt T gt and the summer winter switch to winter position Turn the knob of the heating thermostat clockwise to maximum 8 Remove the inspection panel of the P C B and fit a small cross head screwdriver in to the right hand potentiometer Turn clockwise to increase the pressure or counter clockwise to reduce the pressure Adjust the setting to the required heating pressure value displayed on the pressure gauge as indicated in the diagrams shown in page 10 9 Turn off the boiler by placing the main switch to the Off position Setting pressure for soft ignition Disconnect the detection electrode connection from the P C B Start the boiler and during the ignition sequence adjust the left hand potentiometer until the gas pressure reads the required gas pressure as per the table below Once the gas pressure is set turn off the boiler and re connect the connection to the P C B NB It may be necessary to reset the flame failure reset a number of times during this operation NATURAL GAS G20 BUTANE GAS G30 PROPANE GAS G31 Recommended pressure for soft light ignition 8 mbar 16 mbar 16 mbar B063 Regulating the heating power for natural gas G20 Regulating the heating power for butane gas G30 Regulating the heating
24. section 3 6 and cleaning of the burner if needed If called for by point 3 dismantling and cleaning of the combustion chamber If called for by point 4 dismantling and cleaning of the burner jets Visual check of the primary heat exchanger check for overheating in the blade assembly clean the exhaust fan if needed Adjustment of the flow rate of the gas flow rate for lighting partial load and full load Check of the heating safety systems safety device for maximum temperature safety device for maximum pressure Check of the gas safety systems safety device for lack of gas or flame ionisation detection electrode safety device for gas cock Check of the electrical connection make sure it complies with the instructions in the manual Check of domestic hot water production efficiency flow rate and temperature General check of the combustion by products of the discharge ventilation system Check of the general performance of the unit 21 7 MISCELLANEOUS 7 1 WIRING DIAGRAM FOR Two HEATING ZONES e BROWN e BLUE 2 BOILER ELECTRICAL SUPPLY CABLE e GREY e ORANGE Remove internal time clock plug from the the P C B then connect kd m YPICAL room stat terminal block on the AE JUNCTION BOX reverse of the boiler control panel see section 2 10 to 9 10 on the junction box Based on Honeywell controls microGENUS 23 27 MFFI PROGRAMMER e BLUE
25. the boiler in place using the template and anchors supplied with the unit It is highly recommended that a spirit level be used to position the boiler so that it is perfectly level For additional information please consult the instructions contained in the connection kit and the flue kit 2 7 ELECTRICAL CONNECTION For safety purposes have a competent person carefully check the electrical system in the property as the manufacturer will not be held liable for damage caused by the failure to earth the appliance properly or by anomalies in the supply of power Make sure that the residential electrical system is adequate for the maximum power absorbed by the unit which is indicated on the rating plate In addition check that the section of cabling is appropriate for the power absorbed by the boiler The boiler operates with alternating current as indicated in the technical information table section in 6 where the maximum absorbed power is also indicated Make sure that the connections for the neutral and live wires correspond to the indications in the diagram The appliance electrical connections are situated on the reverse of the control panel see the servicing manual for further information IMPORTANT In the event that the power supply cord must be changed replace it with one with the same specifications Make the connections to the terminal board located within the control panel as follows The yellow green wire should be c
26. the other one of our Authorised Service Centres should be contacted 6 TIME CLOCK i KAN LL LT ANN EW UTO11Ap J Note the time clock is for central heating control only The time clock is provided with 96 Switches called riders each of which covers a time interval of 15 minutes four per hour When a rider is switched from the inside off setting to the outside of the clock border on setting the circuit is closed switch on for a period of 15 minutes and then the boiler starts if the room thermostat if installed or the heating thermostat require heat heating function on EXAMPLE To set the heating of your home in the time interval from 7 00 am to 9 30 am and from 7 00 pm to 10 00 pm every day rotate the outer ring of the clock ina clockwise direction until the correct time of day 24h lines up with the arrow on the clock at approx 2 o clock position under no circumstances should the minute hand be moved manually make sure all the switches i e the riders are placed on the inside of the 17 clock border on and will only shut off upon the pull outward the riders for 7 00 am request of the room thermostat if and 9 30 am and then all riders installed or the heating thermostat between these two repeat this for 7 00 pm and 10 00 2 Position Or NIN pm HEATING OFF in Other heating intervals may be set in this position the IND the same way clock ci
27. unit contained in this manual as they provide important User s mig GENUS information regarding the safe Manuel installation use and maintenance of the product For operating instructions please consult the separate User s Manual Read the instructions and recommendations in these Installation Instructions carefully to ensure proper installation use and maintenance of the appliance Keep this manual in a safe place You may need it for your own reference while our Servicing Centre technicians or your installer may need to consult it in the future This is a combined appliance for the production of central heating C H and domestic hot water D H W This appliance must be used only for the purpose for which it is designed The manufacturer declines all liability for damage caused by improper or negligent use No asbestos or other hazardous materials have been used in the fabrication of this product Before connecting the appliance check that the information shown on the data plate and the table on pages 4 5 comply with the electric water and gas mains of the property You will find the data plate on the reverse of the control panel The gas with which this appliance operates is also shown on the label at the bottom of the boiler Do not install this appliance in a damp environment or close to equipment which spray water or other liquids Do not place objects on the appliance Do not allow children or inexperienced pers
28. 10 Minutes 15 C 1013 mbar G30 G31 Temp of exhaust fumes at nominal capacity COzContent Oz Content CO Content Minimum Ambient Temperature Head Loss on Water Side max AT 20 C Residual Head of System Heating Temperature Domestic Hot Water Temperature D H W Flow Rate AT 35 C D H W Flow Rate AT 35 C D H W Minimum Flow Rate Pressure of Domestic Hot Water Expansion Vessel Capacity Expansion Vessel Pre load Pressure Maximum Water Content of System Maximum Heating Pressure Nominal Pressure Natural Gas G20 LPG G30 G31 Electrical Supply Power Consumption Protection Grade of Electrical System Internal Fuse Rating Weight G C Number 47 116 14 Calculated at 70 maximum output Manufacturer Commercial subsidiary MTS GB LIMITED MTS Building Hughenden Avenue High Wycombe Bucks HP13 5FT Telephone 01494 755600 Fax 01494 459775 m GENUS 27 MFFI 63AU4549 29 8 12 0 m GENUS 23 MFFI 63AU4549 max min kW 25 6 11 0 max min kW 96 92 9 96 91 1 1 0 6 1 0 4 49 5 0 96 2 72 0 32 0 39 2 02 2 00 123 7 2 7 5 51 9 5 200 0 25 82 42 56 36 9 7 2 2 93 5 90 7 0 2 6 3 0 4 60 1 60 3 15 0 37 2 34 2 31 128 8 6 9 8 1 48 5 200 0 25 82 42 56 36 11 4 2 6 mbar bar max min C max min C min gal min min 2 6 2 6 max min bar 8 0 2 8 0 2 6 6 bar 1 1 130 130 bar 3 3 mbar 20 20 mbar 30 37 30 37 V Hz 230 50 230 50 W 1
29. 40 155 IP X4D X4D FAST2AT FAST2AT Kg 38 39 47 116 15 Merloni TermoSanitari SpA Italy Technical Service Hot Line 01494 539579 23 99 84 1469 000 B062 Stampa bieffe recanan e mit GENUS Instructions Type C Boilers G C N 47 116 14 47 116 15 LEAVE THESE INSTRUCTIONS WITH THE END USER 0 EN benchmark of vibe be for the inst The code allation commissioning amp servicing of central heating systems Country of destination GB TABLE OF CONTENTS 1 1 1 2 1 3 1 4 1 5 1 6 2 1 SERVICING INSTRUCTIONS REPLACEMENT OF PARTS To GAIN GENERAL ACCESS Removing the front panel Removing the sealed chamber frontal cover Removing the side panels ACCESS TO THE COMBUSTION CHAMBER Removing the combustion cover Removing the burner and jets Removing the electrodes Removing the main heat exchanger Removing the air pressure switch Removing the fan Removing the venturi device SERVICING AND REMOVAL OF THE GAS VALVE Setting the gas pressures Removing the spark generator Removing the gas valve ACCESS TO THE WATER CIRCUIT Removing the D H W secondary exchanger Removing the safety valve Removing the automatic air vent Removing the main circuit flow switch Removing the pump Removing the pressure gauge Removing th
30. 5 Pressure guage replaces code 998625 from serial number 2320005600001 999151 Panel sealed chamber front replaces code 998610 from serial number 2320005600001 333 998975 3 Way spring kit DHW replaces code 571447 from serial number 2320005600001 334 998974 Heating actuator bush replaces code 998013 from serial number 2320005600001 354 999207 Pump head 27kW replaces code 998961 from serial number 2320005600001 LOOT
31. B 35400 379 373 374 382 E B063 Manufacturer Commercial subsidiary Merloni TermoSanitari SpA Italy MTS GB LIMITED MTS Building Hughenden Avenue High Wycombe Bucks HP13 5FT Telephone 01494 755600 Fax 01494 459775 internet http www mtsgpb ltd uk E mail info mtsgb ltd uk Technical Service Hot Line 01494 539579 Stampa Bieffe Recanati 23 99 84 1470 312 w mt GENUS Manual Ba E Benchman 2 The code cm pads e for the installat commissioning amp servicing of centr al heatin ing 2 systems Gi ARISTON N Dear Customer Thank you for choosing an ARISTON boiler We guarantee that your boiler is a reliable and technically sound product This User s Manual provides detailed instructions and recommendations for proper installation use and maintenance Remember to keep this manual in a safe place for future reference i e by the gas meter Your local MTS Servicing Centre is at your complete disposal for all requirements MTS GROUP The guarantee on this appliance is valid for 24 months from the first day of installation Repairs to the electric hydraulic or gas circuits may be carried out only by your local authorised MTS Servicing Centre Every attempt has been made to avoid errors of any kind in this User s Manual the Management invites customers to inform of any inaccuracies which they may find
32. By pass 4 M Wd a 11 Domestic Hot Water Temperature Probe T ZZ d 12 Secondary Heat Exchanger 9 I ds an 7 13 Gas Valve 6 H 14 Domestic Water Inlet Filter fee 18 15 Pressure Gauge 16 Safety Valve 7 E 17 17 Circulation Pump with Automatic IE E Dc XO 16 Air Release Valve p iin 77 2 Tr 18 Domestic Hot Water Flow Switch 8 acm G6 KK 19 Expansion Vessel 3 4 il ON NG T T 15 20 Air Pressure Switch 10 vf m A Central Heating Flow B Domestic Hot Water Outlet X X X C Inlet Gas C D E D Domestic Cold Water Inlet 12 13 14 E Central Heating Return 14 3 3 1 COMMISSIONING INITIAL PREPARATION MTS GB Limited support the Gezetmerg gt initiative Within the information pack you will find a copy of the ezcme logbook It is important that this is completed in the presence of your customer they are shown how to us it and it is signed by them Please instruct your customer that they must have their Zezetmef5 logbook with them whenever they contact a service engineer or us Preliminary electrical system checks to ensure electrical safety must be carried out by a competent person i e polarity earth continuity resistance to earth and short circuit FiLLING THE HEATING SYSTEM Remove the panels of the case and lower the control panel see section 3 3 for further information Open the central heating flow and return cocks supplied with the connection kit Unscrew the cap on the automatic air rel
33. CHANGES Spares listed below are not interchangeable with those in Ed 1 6 999102 Pipe expansion vessel replaces code 998584 from serial number 2320005600001 15 999103 Pipe flow replaces code 998815 from serial number 2320005600001 29 999162 Pump bracket replaces code 998606 from serial number 2320005600001 33 999091 Pump 27kW replaces code 998336 from serial number 2320005600001 39 999059 Front cover replaces code 998827 from serial number 2320005600001 999245 Pressure guage replaces code 998625 from serial number 2320005600001 998952 Control panel not listed on original drawing 998953 Cable holder cover not listed on original drawing 48 999153 High voltage wiring replaces code 998859 from serial number 2320005600001 68 999204 Fan 23kW replaces code 998621 from serial number 2320005600001 81 998019 Pipe safety valve outlet replaces code 573176 from serial number 2320005600001 86 998433 Burner jet NG 1 30 replaces code 998714 from serial number 2320005600001 86 999103 Pipe flow replaces code 998815 from serial number 2320005600001 92 999148 Selector knob comfort replaces code 998605 from serial number 2320005600001 94 999406 Cable time clock not listed on original drawing 998963 Panel combustion chamber R H replaces code 998599 from serial number 2320005600001 99924
34. Honeywell controls microGENUS 23 27 MFFI ORANGE GREENYELLON V4043H HEATING VALVE BROWN BLUE GREY ORANGE GREENYELLOW V4043H HOT WATER VALVE 1 PROGRAMMER 3 ler Sunvic Reg 5 SP 50 100 Link L 3 Switchmaster Symphony Sonata Switchmaster 400 600 SWITCHMASTER 805 900 Sunvic ET 1451 Sunvic DHP 2201 owerchron FP Link 1 5 4 7 9 owerchron MP Link 1 4 6 11 owerchron 2000 ACL LS522 LS722 Randall 922 972 Link L 2 5 Randall 3020 P and 3060 240V MAINS INPUT 3 AMP 3 4 PROGRAMMER 6 3 1 Cylinder i thermostat RWB2 Thermal cut out ST 6400 ST 6300 ST 6200 Honeywell ST 699B 1002 Drayton Tempus 7 Link L 5 8 Horstmann 425 525 527 Link L 2 5 Potterton EP2000 3000 Link L 5 EP2001 3001 T Glowworm Klastermind Landis amp Gyr RWB20 Randall 102 102 E Microgyr Sangamo 410 Form 1 Potterton Miniminder Link 3 6 Landis amp G Randall 4033 ink 1 6 23 7 TECHNICAL INFORMATION CE Certification Heat Input Heat Output Efficiency of Nominal Heat Input Efficiency at 30 of Nominal Heat Input Heat Loss to the Casing AT 50 C Flue Heat Loss with Burner Operating Flue Heat Loss with Burner Off Maximum Discharge of Fumes G20 Residual Discharge Head Consumption at Nominal Capacity G20 Gas Consumption after
35. OVOZESFASC7 ronmoo Fic 2 12 Time Clock Connector Central Heating Selection Winter and Temperature Adjustment Connector for Total Check System Domestic Hot Water Temperature Adjustment Soft light Adjustment Maximum Heating Adjustment On Off Switch On Off L E D Fume Sensor L E D Ignition Failure Lockout L E D Low System Water Level Lack of Circulation L E D Reset Button Economy Comfort Selector Overheat L E D Temperature L E D s Transformer Circulation Pump Relay Fan Relay Gas Valve Relay Motorised Diverter Valve Relay Spark Generator A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 Ali A12 A13 A14 Colours Gry Wh Pnk Brn BI Blk Rd BIk Circulation Pump Fan Spark Generator Gas Valve Supply Motorised Diverter Valve Flame Detection Circuit Detection Electrode Main Circuit Temperature Probe Domestic Hot Water Temperature Probe Domestic Hot Water Flow Switch Main Circuit Flow Switch Modulator Air Pressure Switch Safety Thermostat External Room Thermostat Grey White Pink Brown Blue Black Red Black
36. afety devices which in the event of a defective discharge of exhaust fumes automatically interrupts the gas supply thereby shutting off the boiler The shut off of the boiler is temporary and is indicated by the illumination of the yellow L E D E for a period of about 15 minutes Once this time period has passed and the discharge state of exhaust fumes has returned to normal the boiler automatically turns back on 15 IMPORTANT If this situation occurs frequently contact an Authorised Service Centre so that they may check that the exhaust fumes are being expelled correctly and that the area is ventilated properly ANTI FROST DEVICE The boiler is fitted with a device which in the event that the water temperature goes below 5 C the three way diverter valve switches to domestic hot water and the burner turns on at minimum power until the water in the boiler has reached a temperature of about 50 C This device is only activated when the boiler is operating perfectly and the system pressure is sufficient the boiler is powered electrically gas is being distributed 16 4 MAINTENANCE Schedule an annual maintenance check up for the boiler with a competent person Correct maintenance always results in savings in the cost of running the system 5 CHANGE OF GAS TYPE Our boilers are designed to function either with Natural Gas methane or LPG gas If you need to changeover from one gas to
37. alves or cock type valves within the system SYSTEM DESIGN This boiler is suitable only for sealed systems Drain Cocks These must be located in accessible positions to permit the draining of the whole system The taps must be at least 15mm nominal size and manufactured in accordance with BS 2870 1980 SAFETY VALVE DISCHARGE The discharge should terminate facing downward on the exterior of the building in a position where discharging possibly boiling water amp steam will not create danger or nuisance but in an easily visible position and not cause damage to electrical components and wiring The discharge must not be over an entrance or a window or any other type of public access AIR RELEASE POINTS These must be fitted at all high points where air naturally collects and must be sited to facilitate complete filling of the system The appliance has an integral sealed expansion vessel to accommodate the increase of water value when the system is heated It can accept up to 6 1 3 gal of expansion water If the heating circuit has an unusually high water content calculate the total expansion and add an additional sealed expansion vessel with adequate capacity MAINS WATER FEED CENTRAL HEATING There must be no direct connection to the mains water supply even through a non return valve without the approval of the Local Water Authority FILLING A temporary method for initially filling the system and replacing lost water dur
38. d diverter valve 13 Main circuit temperature probe 14 Main circuit flow switch 15 Domestic hot water temperature probe 16 Gas valve 17 Spark generator 18 Domestic cold water inlet filter 19 Secondary heat exchanger 20 Circulation pump with automatic air release valve 21 Safety valve 3 bar 22 Domestic hot water flow switch oa 23 Expansion vessel 24 Exhaust pressure intakes Venturi tubes 19 25 Air pressure switch 26 Combustion analysis intakes 2 2 1 2 2 INSTALLATION REFERENCE STANDARDS SiTING THE APPLIANCE The technical information and instructions provided herein below are intended for the installer so that the unit may be installed correctly and safely The installation and initial start up of the boiler must be by a CORGI Approved Installer in compliance with the installation standards currently in effect as well as with any and all local health and safety standards i e CORGI This appliance must be installed by a competent installer in accordance with current Gas Safety installation amp use Regulations The installation of this appliance must be in accordance with the relevant requirements of the current Gas Safety installation amp use Regulations the Local Building Regulations the current I E E Wiring Regulations the byelaws of the local water authority and in Scotland in accordance with the Building Standards Scotland Regulation and Health and Safety document No 635 Elec
39. d for the installation within a cupboard This appliance is not suitable for outdoor installation The type C appliances in which the combustion circuit air vent intake and combustion chamber are air tight with respect to the room in which the appliance is installed can be installed in any type of room There are no limitations with respect to ventilation and the volume of the room itself The boiler must be installed on a solid permanent wall to prevent access to the electrical parts when live through the aperture on the back frame 237 le gt lt fa gt 130 G i Yq 156 A Z Z e o N 4 BENE l NM I I B II J H T I 100 Gas i i i i i ie A 4 aM M m 4 105 login n7 ARI 305 6865 67 67 65 68 315 MU mera He c Ht HOM 4 Ww A A AB C DE 4 1 2 3 4 Fico 2 1 7 7 eo LO J60 60 450 V FIG 2 2 u 50 mm HTOSVV F k 200 mm us A 170 mm Gp Fic 2 3 E 2 3 OVERALL DIMENSIONS LEGEND A Central Heating Flow 3 4 B Domestic Hot Water Outlet 1 2 C Gas Inlet 3 4 D Domestic Cold Water Inlet 1 2 E Central Heating Return 3 4 2 4 CLEARANCES In order to allow for access to the interior of the boiler for maintenance purposes the boiler must be installed in compliance with the minimum clearances indicated in Fic 2 2 2 5 MOUNTING THE APPLIANCE Fasten
40. e expansion vessel Removing the overheat thermostat Removing the heating temperature sensor N T C Removing the D H W temperature sensor N T C Removing the divertor valve actuator Removing the D H W flow switch ACCESS TO THE CoNTROL SYSTEM Checking the fuses Removing the time clock Removing the P C B FAULT FINDING FAULT FINDING GUIDE FLOW CHART ELECTRICAL DIAGRAMS SHORT SPARE PARTS LIST B063 1 SERVICING INSTRUCTIONS To ensure efficient safe operation it is recommended that the boiler is serviced annually by a competent person Before starting any servicing work ensure both the gas and electrical supplies to the boiler are isolated and the boiler is cool Before and after servicing a combustion analysis should be made via the flue sampling point please refer to the Installation Manual for further details After servicing preliminary electrical system checks must be carried out to ensure electrical safety i e polarity earth continuity resistance to earth and short circuit 1 1 REPLACEMENT OF PARTS The life of individual components varies and they will need servicing or replacing as and when faults develop The fault finding sequence chart in chapter 2 will help to locate which component is the cause of any malfunction and instructions for removal inspection and replacement of the individual parts are given in the following pages 1 2 To GAIN GENERAL ACCESS All testing a
41. ease valve one full turn and leave open permanently Close all air release valves on the central heating system Gradually open valve s at the filling point filling loop connection to the central heating system until water is heard to flow do not open fully Open each air release tap starting with the lower point and close it only when clear water free of air is visible Purge the air from the pump by unscrewing anticlockwise the pump plug and also manually rotate the pump shaft in the direction indicated by the pump label to ensure the pump is free Close the pump plug Continue filling the system until at least 1 bar registers on the pressure gauge Inspect the system for water soundness and remedy any leaks discovered FILLING OF THE D H W SYSTEM Close all hot water draw off taps Open the cold water inlet cock supplied with the connection kit Open slowly each draw off tap and close it only when clear water free of bubbles is visible GAS SUPPLY Inspect the entire installation including the gas meter test for soundness and purge all as described in BS 6891 1988 Open the gas cock supplied with the connection kit to the appliance and check the gas connector on the appliance for leaks When the installation and filling are completed turn on the central heating System section 3 4 and run it until the temperature has reached the boiler operating temperature The system must then be immediately flushed through The flushing p
42. equate supply is available both to the boiler and the other appliances when they are in use at the same time Pipe work must be of an adequate size Pipes of a smaller size than the boiler inlet connection should not be used VIEW OF THE BoiLER CONNECTIONS LEGEND A Central Heating Flow B Domestic Hot Water Outlet C Gas Inlet D Domestic Cold Water Inlet E Central Heating Return F Safety Valve CENTRAL HEATING Detailed recommendations are given in BS 6798 1987 and BS 5449 1 1990 the following notes are given for general guidance PiPE Work Copper tubing to BS EN 1057 1996 is recommended for water pipes Jointing should be either with capillary soldered or compression fittings Where possible pipes should have a gradient to ensure air is carried naturally to air release points and water flows naturally to drain taps The appliance has a built in automatic air release valve however it should be ensured as far as possible that the appliance heat exchanger is not a natural collecting point for air Except where providing useful heat pipes should be insulated to prevent heat loss and avoid freezing Particular attention should be paid to pipes passing through ventilated spaces in roofs and under floors By PASS The appliance includes an automatic by pass valve which protects the main heat exchanger in case of reduced or interrupted water circulation through the heating system due to the closing of thermostatic v
43. er 998599 Panel combustion chamber R H side 998963 Panel combustion chamber R H side 998598 Panel combustion chamber front 998924 Panel combustion chamber front 998925 Flue hood 999210 Flue hood 998638 Panel insulation front 998895 Panel inuslation front 998076 Gasket sight glass 998075 Sight glass 999151 Panel front sealed chamber ER2000211017002001 998477 Case panel L H side 998596 Insert case 998476 Case panel R H side 998607 Panel front case 998941 D H W actuator kit DESCRIPTION 997029 Operator coils Sit Sigma 998490 Central heating by pass kit 998718 3 Way spring kit C H 998975 3 Way spring kit D H W 998974 Heating actuator bush 998644 O ring A A V 998643 Auto Air Vent 998738 Gasket pump head 998961 Pump head 999207 Pump head 571547 Diaphragm main flow switch 571772 Magnet main flow switch 571771 Spring main flow switch 571770 Main flow switch top cap 998172 Main flow switch reed system 998716 Burner jet full kit NG 998717 NOTE DESCRIPTION Burner jet full kit LPG 11 Not supplied as a spare part 12 Not illustrated PART NOTIFICATION OF
44. fore the more convenient choice To access the areas in which adjustments are made it is necessary to open the control panel as indicated in section 3 3 then remove the rear inspection cover by unscrewing the two screws Access is thereby provided to the P C B and to the following components 1 2 3 4 the power supply cable connector the fuses the soft light potentiometer the setting for which can range from the minimum thermal power to the maximum the maximum thermal heating power potentiometer adjustable by the minimum to maximum power already calibrated in the factory to 7096 of the maximum thermal power the potentiometer for adjusting the ignition delay anti cycling feature which can be set from 0 to 2 minutes set in the factory at one minute the time clock connector 17 3 6 A 3 7 COMBUSTION ANALYSIS TAN Fume DISCHARGE MONITORING 3 8 BoiLER SAFETY SYSTEMS The flue connector has two apertures readings can be taken for the temperature of the combustion by products and of the combustion air as well as of the concentrations of Oz and CO etc To access these intakes it is necessary to unscrew the front screw and remove the metal plate with sealing gasket The best test conditions with the maximum heating power are achieved by turning the selector knob C to the max position and removing the electrical connection to the heating sensor see sect
45. he pressure back up to 1 bar Check the exhaust flue for the fumes produced by combustion Make sure that all gate valves are open Turn on the gas cock and check the seals on the connections including the one for the burner making sure that the meter does not signal the passage of gas Check the connections with a soap solution and eliminate any leaks Press the reset button A for the lighting system the spark will light the main burner If the burner does not light the first time repeat the procedure Check the minimum and maximum pressure values for the gas going to the burner adjust it if needed using the values indicated in the table in section 4 See the relative section for burner pressure adjustment within the servicing manual See section 3 2 for references it is possible to Set the temperature of the heating system by adjusting the knob C Set the temperature of the domestic hot water by turning knob B The selector knob G allows the user to choose the economy mode position E or the comfort mode position C The economy mode is the normal state for the operation of the boiler since the domestic water is heated up only when a tap is turned on The comfort mode is a special operating state because the water contained in the secondary exchanger and in the primary exchanger is kept in a preheated condition thereby allowing a quicker delivery of domestic water when required The latter is there
46. ic 1 63 d fre 4 1190 tif Fic 1 64 B063 Removing the P C B 1 Isolate electricity 2 Remove the inspection cover from the reverse of the control panel 3 Unplug all electrical connections from the P C B Fia 1 65 4 Remove the screws X1 Fic 1 66 5 Separate the facia panel from the rear of the control panel Fic 1 67 7 Remove the screws Y1 and remove the P C B Fia 1 68 tm EIC M See fic 1 65 4 1 FiG 1 66 FiG 1 67 B063 82 eps Fic 1 68 17 2 FAULT FINDING 2 1 FAULT FINDING GUIDE It is possible to detect and correct any defect by using the standard fault FLOW CHARTS finding diagrams described in this chapter PRELIMARY CHECK MAKE SURE THAT 1 There is sufficient water in the system 2 The gas is turned on 3 The electrical supply is turned on TURN ON THE ON OFF SWITCH te IS THE POWER L E D NO ON 1 Check the fuses YES 2 Check the power supply cable plug and outlet 3 Check replace the power supply to the P C B IN POSTION OF THE SELECTOR Comfort ECONOMY ECONOMY Comfort COMFORT COMFORT SELECTOR SELECTOR NO NO H Economy Economy D H W IS BEING DRAWN D H
47. ing servicing in accordance with Water Supply Byelaw 14 must be provided Domestic WATER The domestic water must be in accordance with the relevant recommendation of BS 5546 1990 Copper tubing to BS EN 1057 1996 is recommended for water carrying pipe work and must be used for pipe work carrying drinking water RESIDUAL HEAD OF THE BOILER o 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 2 9 FLUE CONNECTIONS 60 100 mm FLuE SvsrEM The provision for satisfactory flue termination must be made as described in BS 5440 1 The appliance must be installed so that the flue terminal is exposed to outdoor air The terminal must not discharge into another room or space such as an outhouse or lean to It is important that the position of the terminal allows a free passage of air across it at all times The terminal should be located with due regard for the damage or discolouration that might occur on buildings in the vicinity In cold or humid weather water vapour may condense on leaving the flue terminal The effect of such steaming must be considered If the terminal is less than 2 metres above a balcony above ground or above a flat roof to which people have access then a suitable terminal guard must be fitted When ordering a terminal guard quote the appliance model number A suitable terminal guard is available from
48. ion 6 In the boiler it is possible to monitor the correct operation of the flue exhaust air intake checking for a loss of general pressure in the system Through the use of a differential manometer connected to the test points of the combustion chamber it is possible to detect the AP of operation of the air pressure switch The value detected should not be less than 1 2 mbar under conditions of maximum thermal power in order for the boiler to function properly and without interruption The boiler is fitted with the following devices see section 3 2 for references 1 IGNITION FAILURE This control signals an ignition failure on the burner 7 seconds after a lighting failure The L E D F will illuminate to signal the shutdown status The system can be reset by pressing and releasing the button H after checking to make sure that the gas cock is open CIRCULATION FAILURE This control signals that the safety pressure switch on the primary circuit has not sensed a pressure of at least 1 bar within 40 seconds of the activation of the circulation pump the circulation pump comes to a halt and the red L E D J illuminates The system may be reset after re establishing the correct level of pressure in the boiler turning the A knob OVERHEATING This control shuts off the boiler in the case where the primary circuit reaches a temperature in excess of 105 C The red L E D s I and F will illuminate to signal thi
49. it to a fully horizontal position To dismantle the front casing panel it is necessary to 1 Remove the two screws B 2 Lift the front casing panel up and forward y 16 3 4 INITIAL START UP 3 5 OPERATIONAL ADJUSTMENTS THE CHECKS TO BE RUN BEFORE INITIAL START UP ARE AS FOLLOWS 1 4 o Make sure that the screw on the automatic air valve has been loosened when the System is full If the water pressure in the system is below 1 bar bring it up to the appropriate level Check to see whether the gas cock is closed Make sure that the electrical connection has been made properly and that the earth wire is connected to an efficient earthing system Supply power to the boiler by turning the On Off switch A see Fic 3 1 the L E D D will illuminate turn the selector knob C to the winter central heating position This will start the circulation pump After 7 seconds the boiler will signal a shutdown due to ignition failure Leave the boiler as it is until all of the air has been bled from the lines Loosen the cap on the head of the pump to eliminate any air pockets Repeat the procedure for bleeding the radiators of air Open the taps for a brief period Check the system pressure and if it has dropped open the filling loop again to bring t
50. jets Consumption 15 C 1013mbar Consumption 15 C 1013mbar Gas Cock Outlet Pressure max min 1 mbar 2 10 197 mmc a The outlet pressure of the gas cock is obtained by completely loosening the screw on the solenoid The maximum pressure of the gas to the burner will be equal to the nominal delivery pressure minus the head loss within the gas valve 4 1 CHANGING THE The boiler can be converted to use either methane natural gas G20 TvPE or GAS or LPG G30 G31 by an Authorised Service Centre The operations that must be performed are the following 1 Replace the jets on the main burner see table in section 4 2 Adjust the maximum and minimum thermal capacity values for the boiler see table in section 4 3 Replace the gas rating plate 4 Adjust the maximum thermal power setting 5 Adjust the soft light feature 6 Adjust the ignition delay feature for the heating system can be set from 0 to 2 mins CATEGORY II2H3 Methane Liquid Gas Propane G20 Gas G31 20 5 MAINTENANCE It is recommended that the following inspections be carried out on the boiler at least once a year 1 2 3 4 5 6 7 10 i 12 13 14 Check the seals for the water connections replacement of any faulty seals Check the gas seals replacement of any faulty gas seals Visual check of the entire unit Visual check of the combustion process or analysis of combustion by products see
51. lace P C B BOILER SAFETY SHUTDOWN BEEN ACTIVATED Shutdown L E D off fan restarts FC004Ad B063 21 THERE STILL A PROBLEM ES NO 4 NORMAL OPERATION FAULTS POSSIBILE CAUSES Drawing D H W When you turn on a tap burner switches off air in secondary heat exchanger faulty main circuit flow switch faulty D H W flow switch 2 Drawing D H W faulty 3 I radiators heat up in summer mode auny away yae 3 Drawing D H W check C H D H W temperature probes insufficient hot water check gas pressures temperature check water flow rate check secondary heat exchanger primary heat exchanger faulty or 4 Drawing D H W p y 9 y noisy operation lime scale deposits low heating system water pressure check gas pressures check C H D H W temperature probes Decrease increase heating circuit pressure check for leaks on the heating circuit faulty filling loop faulty secondary heat exchanger expansion vessel faulty Repeated shutdowns faulty detection electrodes check gas settings check flame detection electric circuit Repeated intervention of safety thermostat C H D H W temperature probes open circuit overheat thermostat not calibrated correctly air in primary water circuit When cold water tap turned off the boiler ignites drop in
52. leads T by pulling upward Fic 1 27 2 Remove the screw V Fic 1 28 3 Remove the spark generator Fic 1 29 Py T Fic 1 27 43 eps 44 eps e Fic 1 29 B063 Removing the gas valve 1 Disconnect all the cables from the solenoid and modureg 2 Remove the spark generator see previous section 3 Release the top nut W Fia 1 30 4 Remove the screws X from the bottom of the gas valve pipe Fia 1 31 5 Remove the gas valve Fic 1 32 Z gt l P SNC A En uM x E an 2 Fic 1 30 427 873 48 eps i Fia 1 31 s A n 38 eps j Fic 1 32 B063 1 6 Access TO THE WATER CiRCUIT Important Before any component is removed the boiler must be drained of all water Removing the D H W secondary exchanger 1 Remove the screws Y Fia 1 33 Fic 1 34 2 Push the exchanger towards the rear of the boiler and lift upwards and remove out of the front of the boiler Fia 1 35 3 Before replacing the exchanger ensure that the O rings are in good condition and replace if necessary
53. max settings ADJUSTING THE HEATING summer MAX MAX winter 0 M a 5 5 3 i74 A x UTO11Ae UTO11Af C 2 It is possible to set the temperature of the heating system by adjusting the knob C By positioning the indicator somewhere between min and max a temperature may be obtained which varies from approximately 45 C to about 80 C gt K NA The water o amp temperature in e x s the primary circuit 5 may be checked by z means of the yellow L E D s K EXTERNAL ROOM THERMOSTAT CONTROL If an external room thermostat is installed it is recommended that the temperature of the heating system be set by means of the C knob leaving 11 it at max in order to obtain the best performance from the boiler and to allow the regulation of the external temperature to function efficiently SETTING THE HOT WATER FOR DOMESTIC USE Both in the winter and summer mode the temperature of the domestic hot water may be adjusted by using the B knob A delivery 12 temperature for the water may be chosen in a range from 36 C to about 56 C depending on the flow rate of the water and the position of the knob between the min and max settings ECONOMY COMFORT MODE The selector knob 6 E C G allows the user to choose the e 2 economy mode Q B position E or the 2 comfort mode E GC E position C OB hs The econ
54. mm us QE LIBRARY Installation Instructions Type C Boilers G C N 47 116 14 47 116 15 LEAVE THESE INSTRUCTIONS WITH THE END USER eM Let enchmark The code of practice for the installation commissioning amp servicing of central heating systems ARISTON Country of destination GB mi GENUS T GENUS idi ARISTON TABLE OF CONTENTS 1 2 9 GENERAL INFORMATION GENERAL INSTRUCTIONS OVERALL VIEW INSTALLATION REFERENCE STANDARDS SITING THE APPLIANCE OVERALL DIMENSIONS CLEARANCES MOUNTING THE APPLIANCE ELECTRICAL CONNECTION GAS CONNECTION WATER CONNECTIONS FLUE CONNECTION 2 10 RooM THERMOSTAT CONNECTION 2 11 ELECTRICAL SYsTEM DIAGRAMS 2 12 WATER CiRCUIT DIAGRAMS 3 6 1 6 2 COMMISSIONING INITIAL PREPARATION CONTROL PANEL REMOVING THE FRONT PANEL INITIAL START UP OPERATIONAL ADJUSTMENTS COMBUSTION ANALYSIS FUME DISCHARGE MONITORING BOILER SAFETY SYSTEMS DRAINING THE SYSTEM GAS ADJUSTMENTS Gas ADJUSTMENT TABLE CHANGING THE TYPE OF GAS MAINTENANCE MISCELLANEOUS WIRING DIAGRAM FOR TWO HEATING ZONES WIRING DIAGRAM FOR CONNECTION TO AN ARISTON UNVENTED CYLINDER TECHNICAL INFORMATION 1 1 1 GENERAL INFORMATION GENERAL INSTRUCTIONS This manual is an integral and essential part of the product It should be kept with the appliance so that it can be consulted by the user and our authorised personnel Please carefully read the instructions and notices about the
55. nate In order to reset the ignition the button H must be pressed and released Should the boiler fail to ignite a second time check that the external gas cock is open If the problem persists contact an Authorised Service Centre SHUTDOWN DUE TO OVERHEATING In the event that the safety limit is exceeded for the temperature of the water in the boiler s primary exchanger the thermostat shuts off the boiler and the red L E D J illuminates To remedy this situation wait a few minutes to allow the exchanger to cool down then press and release the reset button H If this situation occurs frequently contact an Authorised Service Centre SHUTDOWN DUE TO INSUFFICIENT WATER CIRCULATION If the red L E D L is illuminated and the boiler is off one O possible cause for this state is an insufficient eles pressure of water in the system Check the system pressure on the pressure gauge M and if it is less than 0 5 bar consult your installer for checking and refilling the system Then turn off and turn back on the boiler by means of the selector knob A f the boiler does not start up again and the L E D L remains illuminated contact an Authorised Service Centre If there are frequent drops in pressure within the system have a plumber check the heating system for possible water leaks TEMPORARY SHUTDOWN DUE TO DEFECTIVE DISCHARGE OF EXHAUST FUMES The boiler is fitted with s
56. nd maintenance operations on the boiler require the control panel to be lowered This will also require the removal of the casing Removing the front panel 1 Loosen the fastening screws A of the control panel located on the lower part of the panel itself Fic 1 1 Fic 1 1 The control panel moves downward and when pulled forward rotates on two lateral hinges the panel stays in a semi horizontal position which allows access to the inner parts of the boiler Fic 1 2 In order to increase the manouvering space it is possible to raise the control panel and rotate it to a fully horizontal position Fic 1 3 Remove the screws B from the front panel bottom lip FiG 1 4 Lift the front panel from the raised screws at the the top of the casing Fic 1 5 FO016A 15 eps Removing the sealed chamber frontal cover Removing the side panels 1 Remove the screws C Fic 1 6 1 Remove the four screws D for each side panel FiG 1 8 2 Lift the sealed chamber frontal cover from the locating pins 2 Pull the panel away from the boiler then lift the panel up and FiG 1 7 remove from the boiler Fic 1 9 FiG 1 8 Fic 1 6 98 tif Fic 1 9 NEES me N si 17 eps E Fic 1 7 97 tif 4 B063 1 3 ACCESS TO THE COMBUSTION CHAMBER Removing the combustion cover 1 Remove the scre
57. ng on the type of flue system used by the installer CoaxiaL Systems Fic 2 10 10 RA QQQQSRAQQQH sy SS IMPORTANT For all flue systems a restrictor must always be inserted into the boiler s flue connector the restrictor must be 41 or 47 in diameter depending on the length of piping indicated in TABLE 2 1 The diagrams illustrate some of the various designs for coaxial or twin pipe flue systems For further information on discharge ventilation accessories see the FLUE PIPE ACCESSORIES MANUAL m GENUS 23 MFFI Exhaust Type Coaxial Systems 60 100 Exhaust Type Twin Pipe Systems 80 80 Restrictor 41mm L min 0 5 m L max 2 m Restrictor g 41mm L max 11 5 m L max 16m m GENUS 27 MFFI Exhaust Type Coaxial Systems 60 100 Exhaust Type Twin Pipe Systems 0 80 80 Restrictor 41mm L min 0 5 m Lmax 1m Restrictor 41mm L max 34m Restrictor 47mm Lmin 2m Lmax 4m Restrictor 47mm Lmin 11 5m L max 43m Lmin 16m L max 43m NO Restrictor Lmin 1m Lmax 4m NO Restrictor L min 2 34m L max 54 m TABLE 2 1 Maximum Extension Exhaust Air Risk of
58. omy mode is the normal state for the operation of the boiler since the domestic water is heated up only when a tap is turned on comfort The comfort mode is a special operating state because the water contained in the secondary exchanger and in the primary exchanger is kept in a preheated condition thereby allowing a quicker delivery of domestic water when required The latter is therefore the more convenient choice TURNING OFF CENTRAL HEATING To turn off the central heating rotate the C knob to the 0 position The boiler will stay in summer mode just providing domestic water on request UTO11Ae TURNING OFF THE BOILER To turn the boiler off rotate the selector knob A to the 0 position OFF the respective green L E D D will go off Close the gas cock located under the boiler and turn the electricity supply Switch located outside the boiler to the OFF position Oz 9 ps UTO11Ab UTO11Aa 13 3 USEFUL INFORMATION AND TROUBLESHOOTING BOILER SHUTDOWN SITUATIONS The boiler is equipped with safety devices that intervene in certain situations and shut it off Most of these situations are communicated by means of the L E D s and at times the user may be able to remedy them SHUTDOWN DUE TO IGNITION FAILURE J De In the event that the automatic ignition of the burner has failed the red 14 rere UTO11Ai L E D F will illumi
59. onnected to the terminal marked with the symbol make sure to re use the ferrule mounted on the other supply cord The blue wire should be connected to the terminal marked N The brown wire should be connected to the terminal 2 8 GAS CONNECTION 2 9 WATER CONNECTIONS Fic 2 5 4 I t Ay T en SE marked L Note The diagrams for the electrical system are indicated in section 2 11 Warning this appliance must be earthed External wiring to the appliance must be carried out by a qualified technician and be in accordance with the current I E E Regulations and applicable local regulations The Genus range of boilers are supplied for connection to a 230 V 50 Hz supply The supply must be fused at 3 A The method of connection to the electricity supply must facilitate complete electrical isolation of the appliance by the use of a fused double pole isolator having a contact separation of at least 3 mm in all poles or alternatively by means of a 3 A fused three pin plug and unswitched shuttered socket outlet both complying with BS 1363 The point of connection to the Electricity supply must be readily accessible and adjacent to the appliance unless the appliance is installed in a bathroom when this must be sited outside the bathroom The local gas region contractor connects the gas meter to the service pipe If the gas supply for the boiler serves other appliances ensure that an ad
60. ons to use the appliance without supervision If you smell gas in the room do not turn on light switches use the telephone or any other object which might cause sparks Open doors and windows immediately to ventilate the room Shut the gas mains tap on the gas meter or the valve of the gas cylinder and call your Gas Supplier immediately If you are going away for a long period of time remember to shut the mains gas tap or the gas cylinder valve Always disconnect the appliance either by unplugging it from the mains or turning off the mains switch before cleaning the appliance or carrying out maintenance In the case of faults or failure switch off the appliance and turn off the gas tap Do not tamper with the appliance For repairs call your local Authorised Servicing Centre and request the use of original spare parts For in guarantee repairs contact MTS GB Limited Check the following at least once a year 1 Check the seals for the water connections replacement of any faulty seals 2 Check the gas seals replacement of any faulty gas seals 3 Visual check of the entire unit 4 Visual check of the combustion process or analysis of combustion by products see section 3 6 and cleaning of the burner if needed 3 Fic 1 0 12 13 If called for by point 3 dismantling and cleaning of the combustion chamber If called for by point 4 dismantling and cleaning of the burner jets Visual check of the primary hea
61. ou with some useful advice on proper use and maintenance Periodically check the system pressure using the pressure gauge M make sure that the pressure is between 1 0 and 1 5 bar the blue part on the gauge when the system is off and cool The warning L E D L will indicate if the pressure is below the minimum recommended UTOO9A value Consult your installer for checking and refilling the system The outer panels of the unit s case must only be cleaned with a damp cloth Do not use abrasive cleaners The control panel can be wiped with either a damp or dry cloth Spray polishes must not be used on the control panel surface or knobs Care must be taken in preventing any liquid entering the appliance PRACTICAL TIPS If the water is very hard it is recommended that a water softener be added to the system so as to reduce the formation of limescale in the boiler exchangers This will ensure that the efficiency of the unit remains the same over time reducing gas consumption and maintenance costs If the boiler should be out of use for a prolonged period it is recommended that the electrical power supply be disconnected and that the external gas cock be closed If low temperatures are expected the boiler and system pipe work should be drained in order to prevent frost damage To improve comfort and take full advantage of the heat produced by the boiler it is recommended that an external room
62. phase the P C B performs a series of internal controls If a malfunction occurs the boiler will shutdown until the problem has been resolved DRAINING THE HEATING SYSTEM The heating system must be emptied as follows Turn off the boiler Open the drain valve for the system and place a container below to catch the water that comes out Empty the system at the lowest points where present If you plan on not using the heating system for an extended period of time it is recommended that you add antifreeze with an ethylene glycol base to the water in the heating lines and radiators if the ambient temperature drops below 0 C during the winter This makes repeated draining of the entire system unnecessary DRAINING THE Domestic Hor WATER SYSTEM Whenever there is the danger of the temperature dropping below the freezing point the domestic hot water system must be drained as follows Turn off the general water valve for the household plumbing system Turn on all the hot and cold water taps Empty the remaining water from the lowest points in the system where present 19 4 GAS ADJUSTMENTS CATEGORY II2H3 Methane Gas Liquid Butane Gas Liquid Propane Gas G20 Lower Wobbe Index 15 C 1013mbar Nominal Delivery Pressure Minimum Delivery Pressure 23 MFFI Main Burner n 13 jets e Consumption 15 C 1013mbar Consumption 15 C 1013mbar Gas Cock Outlet Pressure max min 27 MFFI Main Burner n 15
63. rcuit is always A A The timer has approximately 150 open switch off and v hours of battery back up for power the boiler will failure therefore never ignite V U1014A J for heating The clock is provided with a selector Switch with three positions see figure 3 Central Position j PROGRAMMING MN ACTIVE in this position the A A programming set z by the user is active Me UTOT4A 7 1 Position CONSTANT in this position the clock circuit is always closed switch on therefore the boiler will constantly be 18 TECHNICAL DATA Ambient temperature Running reserve Shortest switching time Programmable 10 C to 55 C 150 h not for 1 5 V DC 15 minutes Every 15 minutes Manufacturer Commercial subsidiary Merloni TermoSanitari SpA Italy MTS GB LIMITED MTS Building Hughenden Avenue High Wycombe Bucks HP13 5FT Telephone 01494 755600 Fax 01494 459775 Technical Service Hot Line 01494 539579 20 Cod 2399841468112 Stampa Bieffe Recanati TEAM A ARISTON SPARE PARTS EXPLODED VIEW WALL HUNG GAS BOILERS Models microGENUS 23 MFFI microGENUS 27 MFFI Edition 2 Current from Serial No 2320005600001to 2320021400002 VM 14 18 19 20 21 18 2 25
64. rocedure must be in line with BS 7593 1992 code of practice for treatment of water in domestic hot water central heating systems During this operation we highly recommend the use of a central heating flushing detergent Fernox Superfloc or equivalent whose function is to dissolve any foreign matter that may be in the system Substances different from these could create serious problems to the 15 3 2 CoNTROL PANEL LEGEND A B C D E F G H J K L M 3 3 REMOVING THE In order to access the inside of the boiler it is necessary to unscrew FRONT PANEL On Off knob Domestic hot water temperature adjustment knob Central heating selection winter and temperature adjustment knob On Off L E D green Fume sensor L E D yellow Ignition failure lockout L E D red Economy Comfort mode selection knob Ignition failure lockout and or overheat reset button Overheat L E D red Low system water level L E D red Fic 3 1 Central heating temperature L E D yellow Time clock Heating system pressure gauge the fastening screws A of the control panel located on the lower part of the panel itself The control panel moves downward and when pulled forward rotates on two lateral hinges The panel stays in a semi horizontal position which allows access to the inner parts of the boiler In order to increase the maneuvering space it is possible to raise the control panel and rotate
65. s shutdown status The system can be reset by waiting a few minutes for the primary exchanger to cool down and then by pressing and releasing the H button LIMESCALE BUILD UP The boiler is equipped with a device that limits the formation of Limescale in the secondary exchanger by controlling the temperature of the domestic hot water max 61 C and also controlling the temperature of the water in the primary heating circuit 18 3 9 DRAINING THE SYSTEM 5 ANTI FROST DEVICE The boiler is equipped with a device that in the event of the water temperature going below 5 C the 3 way diverter valve switches to domestic hot water and the burner ignites at the minimum power until the boiler water reaches a temperature of about 50 C This device operates only if the boiler is functioning perfectly and the system pressure is sufficient the boiler is powered electrically the gas is distributed 6 EXHAUST DISCHARGE ANOMALY SHUTDOWN The boiler is fitted with safety devices which in the event of defective discharge of exhaust fumes automatically interrupts the gas supply thereby shutting off the boiler The shutdown of the boiler is temporary and is indicated by the illumination of the yellow L E D E for a period of about 15 minutes Once this time period has passed and the discharge state of exhaust fumes has returned to normal the boiler automatically turns back on 7 SAFETY SHUTDOWN At the start of every lighting
66. t exchanger check for overheating in the blade assembly clean the exhaust fan if needed Adjustment of the flow rate of the gas flow rate for lighting partial load and full load Check of the heating safety systems safety device for maximum temperature Safety device for maximum pressure Check of the gas safety systems Safety device for lack of gas or flame ionisation detection electrode safety device for gas cock Check of the electrical connection make sure it complies with the instructions in the manual Check of domestic hot water production efficiency flow rate and temperature General check of the combustion by products of the discharge ventilation system Check of the general performance of the unit 1 2 OVERALL VIEW ooN OOaRW N 15 16 17 18 LEGEND 1 Flue connector 2 Air intake for twin pipe flue systems 3 Fan 4 Combustion chamber hood 5 Main heat exchanger 6 Safety thermostat 7 Combustion chamber 8 Combustion chamber insulation panel 9 Burner 10 Detection electrode 11 Ignition electrodes 12 Motorise
67. thermostat be installed It is good practice to clean and service the appliance and central heating system every year Call an Authorised Service Centre IGNITION PROCEDURE Turn the selector knob A to the J position The green L E D D will b D 2 Do UT011Aa UTO11Aq illuminate indicating that the boiler is ready to operate The centralised electronic control unit will ignite the burner without any manual intervention but in response to the request for domestic hot water or heating If after approximately 10 seconds the burner has not ignited the boiler safety devices will shut off the gas and the red L E D F illuminates To reset the ignition system the reset H must be pressed and released Should the 10 boiler fail to ignite a second time check that the external gas cock is open If the problem persists contact an Authorised Service Centre r UTO11Ac Q UT011Ad WINTER AND SUMMER OPERATING MODES In the winter operating mode the boiler will produce both central heating and domestic hot water In the summer operating mode the boiler will produce only domestic hot water Using the knobs on the control panel the user can select winter or summer operating mode Keeping the knob C at the 0 position selects the summer operating mode Winter operating mode may be selected by positioning the knob C between the min and
68. tricity at work regs 1989 Installation should also comply with the following British Standard Codes of Practice Low pressure pipes BS 6891 1988 Boilers of rated input not exceeding 60 kW BS 6798 1987 Forced circulation hot water system BS 5449 1990 Installation of gas hot water supplies for domestic purposes 20d family gases BS 5546 1990 Flues BS 5440 1 1990 Air supply BS 5440 2 1989 The appliance may be installed in any room or indoor area although particular attention is drawn to the requirements of the current I E E Wiring Regulations and in Scotland the electrical provisions of the Building Regulations applicable in Scotland with respect to the installation of the combined appliance in a room containing a bath or shower Where a room sealed appliance is installed in a room containing a bath or shower the boiler and any electrical switch or appliance control utilising mains electricity should be situated so that it cannot be touched by a person using the bath or shower The location must permit adequate space for servicing and air circulation around the appliance as indicated in paragraph 2 4 The location must permit the provision of an adequate flue and termination For unusual locations special procedures may be necessary BS 6798 1987 gives detailed guidance on this aspect A compartment used to enclose the appliance must be designed specifically for this purpose No specific ventilation requirements are neede
69. use the appliance without supervision If you smell gas in the room do not turn on light switches use the telephone or any other object which might cause sparks Open doors and windows immediately to ventilate the room Shut the gas mains tap on the gas meter or the valve of the gas cylinder and call your Gas Supplier immediately If you are going away for a long period of time remember to shut the mains gas tap or the gas cylinder valve Before any intervention within the boiler it is first necessary to cut off the electrical power supply by turning the external switch to OFF This manual may be kept in the front panel of the boiler TECHNICAL INFORMATION Pa GENERAL DATA Heating input max min Heating output max min Efficiency at Maximum Thermal Capacity see installation instructions CENTRAL HEATING Operating Temperature max min Maximum Minimum Heating Pressure Built in expansion vessel Total capacity DOMESTIC HOT WATER Maximum Minimum Temperature of Water for Domestic Use Working pressure max min Flow rate AT 25 C Flow rate AT 35 C Minimum flow rate ELECTRICAL DATA Electrical Supply Frequency Power Consumption Protection of Electrical System CATEGORY Nominal Pressure Methane Gas G20 G25 Nominal Pressure Liquid Gas G30 G31 M 23 kW 27 kW kW 25 6 11 0 29 8 12 0 kW 23 8 9 7 27 8 10 5 926 92 9 93 5 ie 82 42 82 42 bar 3 0 7 3 0 7 litres 6 6 i 56 36 56 36 bar 8 0 2 8
70. ws E Fi 1 10 2 Lift off the combustion cover oi a 3 FiG 1 10 Removing the burner and jets 1 Remove the screws F from the burner Fic 1 11 2 Remove the burner FiG 1 12 3 Remove the jets using a No 7 socket spanner 4 Replace in reverse order B063 Removing the electrodes Before carrying out this procedure unscrew and slide the burner forward see previous section 1 Remove rubber gasket G Fig 1 13 2 To remove the detection electrode disconnect the cable at its connection point close to the P C B Fig 1 14 3 Remove screw H Fic 1 15 4 Gently slide the electrode downward Fic 1 16 To replace repeat the steps in reverse order paying particular attention to the following a Centre the electrode in the positioning hole carefully otherwise the electrode may break Fic 1 16 b Check that the cables have been connected correctly c Check that the rubber gasket covers the cable electrode connection point completely Removing the main heat exchanger 1 Drain the boiler of water 2 Release the overheat thermostat sensor I Fic 1 17 3 Release the two connection nuts J connecting the exchanger to the flow and return pipes Fic 1 18 4 Pull it straight out Fic 1 19 Fig 1 17

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