Ariston Genus 23Kw 27Kw 30Kw GC 47 116 01/08/09/13
Contents
1. GENUS 23 27 30 MFFI X 1 2 7 za 3 06066606 666666 20 4 2 1 5 1 6 I 7 2 19 ae a lug r 5 97 18 11 38 17 2a LC X X 13 14 15 16 GENUS 27 RFFI SYSTEM 2 Fr 3 e 20 k 6 7 8 19 9 18 10 17 C VET 16 1 I 4 Legend uem w qu c D 11 12 13 Secondary Heat Exchanger 15 16 17 18 19 20 ommoom gt Air Pressure Switch Fan Main Heat Exchanger Burner Electronic Ignitor and Electroni2. Fuse 2 Fuse 2 IN 230 17 GENUS 23 27 30 MFFI OO 24V 12V mi SE mE tete xm 088 Hits EI A FFI 1121 3141516 7 8 91011 12 112 3141516 7 o tojtt 12 OC L JUMP TCS DAS oo EC MI FFI GENUS 27 RFFI SYSTEM G9 A 10 12V 112 4 516 7 8 o to tt 12 BO JUMP TCS DAS EH oo CN101 oo oo oo EB C MI FFI 13 B 01 ees D P 4 18 2 12 Water Circuit Diagram
3. Fuse 2A IN 230 VAC 28 B005 GENUS 23 27 MFFI r JUMP TCS DAS EH evo oo 2 D EC MI FFI UJ S S UJ 5 5 5 158 9 1 9 Ww A 0 GENUS 27 RFFI SYSTEM BO BL JUMP TCS DAS CN101 000000 D amp C MI FFI 29 5 4 SHORT SPARE PARTS LIST GENUS 23 27 MFFI SIT Sigma Gas Valve 71 70 63 69 68 656667 66 65 6
4. 80 80 28 74 uf ed 5100 05 99 65 67 67 65 155 A B D E 0 DE GENUS 27 RFFISYSTEM 107 125 125 197 181 x my 8 uU Legend A Central Heating Flow 3 4 Pw T cm eae 22 Domestic Hot Water Outlet 1 2 ar T 1 1 Ts g C Gas Inlet 3 4 81 D Domestic Cold Water Inlet 1 2 ar Cas Central Heating Return 3 4 1132 67 65 NEN C F Oylinder Flow 3 4 G Cylinder Return 3 4 DGE Fig 2 1 24 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 clearance requirements indicated in the diagram below GENUS 23 27 30 MFFI GENUS 27 RFFISYSTEM 1 1 ge 8 8 i gt J gt 60 60 1 1 1 e I i 1 l 1 1 1 1 1 1 1 1 1 1 1 Y 1 mM pe iv I i 8 zu i i I x i Y R L A F
5. Fuse 2A Fuse 2A IN 230 GENUS 27 RFFI SYSTEM S CN 101 BEEBE eee ri QOO 40 50 6 OOO 70 CN 100 M 5 4
6. 19 18 17 16 2 eo No OO OND 01 111213 14 Fig 1 1 Legend Flue Connector Combustion Chamber Hood Main Heat Exchanger Combustion Chamber Insulation Panel Burner Expansion Vessel Overheat Thermostat Spark Generator Diverter Valve MFFI Motorised Valve 10 Main Circuit Temperature Probe 11 Main Circuit Flow Switch 12 Domestic Hot Water Temperature Probe 13 Diverter Valve Microswitch 14 Filter Seat 15 Drain Valve 16 Secondary Heat Exchanger 17 Safety Valve 3 bar 18 Circulation Pump with Automatic Air Release Valve 19 Gas Valve 20 Detection Electrodes 21 Ignition Electrodes 22 Fan 23 Venturi 24 Air Pressure Switch e po NOD IL B004 2 INSTALLATION 2 1 Reference Standards 22 Siting the Appliance The technical information and instructions provided herein below are intended
7. 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 2627 kW id 1 1 1 1 1 I 1 1 1 ji 1 1 1 1 5 6 7 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 kCal h x 1000 OPERATING POWER GAS REQUIREMENTS NATURAL GAS G20 BUTANE GAS G30 PROPANE GAS G31 Gas rate 3 0 m3 h 106 0 ft3 h 0 88 m3 h 31 1 ftS h 1 15 m3 h 40 6 ft h Gas rate 1 2 m3 h 42 3 ft3 h 0 35 m3 h 12 3 ft3 h 0 46 m3 h 16 2 ft9 h Inlet pressure 20 mbar 7 8 in w g 28 mbar 10 9 in w g 37 mbar 14 4 in w g Burner pressure 12 3 mbar 4 8 in w g 28 mbar 10 9 in w g 37 mbar 14 4 in w g Burner pressure 2 0 mbar 0 8 in w g 5 1 mbar 2 0 in w g 7 0 mbar 2 7 in w g Burner injectors GENUS 23 MFFI GENUS 27 27 SYSTEM GENUS 30 MFFI 13x 1 25 15 x 1 25 15 x 1 30 13 x 0 72 15 x 0 72 15 47 13 0 72 15 x 0 72 15 x 0 77 11 10 Remove the pipe from the pressure gauge and connect screw 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 Setting the anti cycling device This appliance is equ
8. 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 b Check that the cables have been connected correctly Check that the rubber gasket covers the cable electrode connection point completely 6 B005 Removing the main heat 1 Drain the boiler of water exchanger 2 Release the two connection nuts and return pipes see fig 1 16 3 Pull it straight out see fig 1 17 connecting the exchanger to the flow Removing the air pressure switch 1 Disconnect the electrical connections K and silicone pipes L from their connection points see fig 1 18 2 Remove screws J on the top of the sealed chamber see fig 1 19 Use a No 2 star tip screwdriver to remove the switch from the plate Fig 1 19 B005 Removing the venturi device 1 Disconnect the silicone pipes and remove the screw N see fig 1 20 2 Extract the venturi see fig 1 21 AL CTI TIS 19452 reir Yrs Removing the fan 1 Disconnect electrical connections and remove screws O using a No 2 star tipped screwdriver see fig 1 22 2 Pull fan to the right and forward and remove see fig 1 23 3 Remove fan from mou
9. This procedure must be done as follows 1 Remove the air vent intake you want to use in the area indicated in Fig 2 9 by breaking the perforated ring 2 Use a tool to grasp the lid and remove it completely 3 Clean any burrs or sharp edges with a knife or an appropriate tool 12 B004 In Fig 2 11 below several different types of flue systems are shown For additional information regarding the flue accessories please consult the Flue Pipe Accessories manual A uam 5 I gt max 500 mm amp 64 06 B004 13 In calculating the lengths of the pipes the maximum length must also take into consideration the values for the exhaust air intake end terminals as well as 90 elbows for coaxial systems The 52 types must comply with the following requirements 1 The discharge intake vent pipes must have the same diameter of o 80 mm 2 The maximum combined flue length is 17 m for Models Genus 23 27 MFFI RFFI and 15 m for Model Genus 30
10. 1006 100644 89 15 0006 000944 0cgMu 9 510081 pu wo seyy 0 sipue 126 Zy uueuiisioH e ET Fa fu 0029 1S 0069 15 0079 1S 8 4 1 MUL 1 n Te en aseo ss cut out l le o IH C P GN x Ha o 240V MAINS INPUT 3 AMP Cylinder B004 28 NOTES 4 NOTES 4 30 31 4 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 Hotline 01494 539579 Stampa bleffe recanar 004 Cod 23 99 84 1259 111 Servicing Instructions Type Boilers G C N 41 116 01 47 116 08 47 116 09 47 116 13 LEAVE THESE INSTRUCTIONS ADJACENT TO THE GAS METER ARISTON TABLE OF CONTENTS 1 SERVICING INSTRUCTIONS 1 1 Replacement of Parts 1 2 To Gain General Access Removing the Front Panel Removing the Bottom Cover Removing the Side Panels 1 3 Access to the Combustion Chamber Removing the Sealed Combustion Chamber Removing the Burner and Injectors Removing the Electrodes Removing the Main Heat Exchanger Removing the A
11. 1 1 1 997208 P C B EB C MI FFI P C B E A FFI P P C B cable 953095 952935 952610 572990 573343 0 3314 571652 570717 564254 269387 997151 573521 571965 574279 574232 574233 0 3441 269390 269560 569561 572343 572372 572835 571993 997029 571443 0 1987 571447 573138 069281 069282 Fan inlet gasket Venturi exhaust manifold header Air pressure switch Fastening spring Automatic air release valve Gasket 1 Pump Gasket 3 8 13 Gasket Gas valve SIT Sigma Spark generator Detection electrode Gasket 1 4 gnition electrode R H gnition electrode L H Main burner Main burner Main exchanger Front panel runner kit Sit Sigma gas valve operator coils Heating by pass kit Sanitary pressure switch kit Way and unit kit Main flow switch reed system Burner jet 1 25 full kit Natural gas Burner jet 0 72 full kit LPG 73 02 071 379 079 N 164 282 101 105 109 111 112 113A 113B 114 301 321 361 362 363 375 381 382 3 9 981 164 261 3 9 979 3 9 980 E02 078 164 311 cO cO cO O O1 O1 I O1 CO OIO 0 gt Q GENUS 23 27 MFFI SIT Tandem Gas Valve 2 71 70 63 69 68 656667 66 65 64 63 62 61 60 59 58 57 56 5
12. 95305 47 J PCB EAFF P 1 95295 48 952600 58 1 59 X 59 573343 __ 62 jVentui exhaustmanifold neader 578314 73 EO02071 Airpressueswith 571652 76 Fastening spring 570717 85 379079 Automaticairreleesevave 564254 v 86 164230 jGasket 569387 8 3 9971051 9 89 164282 Gasket 3 8 573521 9 1965 573023 570732 0 3441 269390 269560 569561 572343 572372 572835 571993 571444 570712 573740 573745 571443 571442 571447 571547 571772 571771 571770 573138 998152 998432 O ring 13 Spark generator Gas valve SIT Tandem Detection electrode Gasket 1 4 gnition electrode R H gnition electrode L H Main burner Main burner Main exchanger Front panel runner kit D H W actuator kit SIT Tandem gas valve operator coils SIT Tandem modureg coil Gas modulator cartridge Heating by pass kit D H W pressure switch kit 3 way spring kit Main flow switch diaphram Main flow switch magnet Main flow switch spring Main flow switch top cap Main flow switch reed system Burner jet 1 25 full kit Natural gas Burner jet 0 72 full kit LPG 379 976 379 981 164 261 379 979 379 980 E02 078 107 111 113 114 115A 115B 115 301 311 321 322 323 361 362 363 371 372 373 374 375 381 382 3
13. exhaust manifoldheader 573314 301 j 519 311 X actuatorkit 571444 321 g SITSigmagasvalveoperatrcols O 9970298 361 1 __ j 571443 36e 11 11 1 571442 363 J S wayspingkt 1 1 1 1 571447 364 jDHW diphamvave o 571446 3731 Main switch diaphram O j 514 372 Jj Mainflowswichmagnet o 571772 373 Mainflowswichsping O j 51771 3 4 j 571770 375 Main flow switch reed system o j 573138 381 jBumerjeti 30fullkit Naturalgas 998152 382 jBumerjetO 77 ulkt LPG 998432 n i i 5 GENUS 27 RFFISYSTEM SIT Sigma Gas Valve 005 E e mn 1 vessel 53 _ 11 164225 3 4 5320 14 Oveheatihermstat 1 1 1 997206 17 Motorised motor 997147 20 jMaiflwswich 573224 21 164338 Temp probe C HW 1 569236 23 164229 1 2 _ _ _ A 53528 _ 25 378814 Manualventcock 573727 26 JjSafeyvave3bart 2 5789172 28 DHW pobe 3 1 950650 30 Pressure gauge 571649 __
14. 997208 44 953045 4 St J RCB EIAMFFl 9529801 47 POB cabe 95260 57 572990 58 J rFaninetgasket 573343 72 EO2071 Airpressueswich 571652 75 JFastmninpsping 570717 84 379079 Automaticairreleasevave O Z o 564254 85 3164230 569387 87 _ i Orig 57140 89 exchanger plate type exchanger 27kW 573295 90 JjOring secondayexchanpger 57385 92 J Orig 20348 571807 95 164282 3 8 5739521 97 997151 100 379976 Gesvalve SITTandem 570732 102 jSpakgenerator C 573003 _ 105 1 04 0 13 571965 113 379981 Detection electrode 57341 117 164261 Gesketi A o 569890 119 2379979 Ignition electrode R H 95695600 120 379980 Ignition electrode L H 5695601 121A 998110 121B 998811 122 C o 57288 128 exhaust manifollheader 573314 301 SC 5719933 311 0 5144 321
15. 00000 50 60 70 8 100 p CN 101 7 Fuse 2 EEHHEHEHNEHNHERNH Q Fuse 2A e IN 230 D OOOOO0 70 8 CN 100 CN 101 7 Fuse 2A BEEEEEEEEE BEEBE BEE K
16. 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 11 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 replace the cap on the screw of the modureg Setting the maximum heating circuit power T set the maximum heating circuit power place the On Off button to position lt 1 gt and the summer winter switch to winter position Turn the knob of the heating thermostat clockwise to maximum 8 Remove the left hand inspection panel of the 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 11 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 see fig 1 13 Start the boiler and during the ignition sequence adjust the centre 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 reconnect the connection to the P C B NB It may be necessa
17. 0 N O 2 oO gt c 9 gt gt u gt O O w between 4 5 on the junction box If a room thermostat is not requied on Zone 2 insert a link between 6 8 on the junction box MAINS INPUT 3 AMP 27 4 iring Connection to Ariston x S 9 Tt cO 65 Qu m 6 2 jem BaUOH UO peseg 110d reverse of the boiler control panel see section 2 10 to 9 10 on room stat terminal block on the the junction box Remove internal time clock plug from the the P C B then connect walsh 44H 0 80099 I44IN 0 c 62 80090 IHAN ZZ IHAN Le l BOILER ELECTRICAL SUPPLY CABLE TYPICAL JUNCTION BOX THERMOSTAT dSWNVdSOdd ul 216 226 Pa fn zus zes 1v 91H 0002 UOJU9J9MO Ofp 1 4 9 ete felo iei 213 fale s _ 8 2 Yul afefe sn Big ra In e a N i 009 cop ejeuos AuoydwA Fe 7 2 1813141 1 0 3 8 2 9 0 3 4 4 V4043H HOT WATER VALVE Lu Lu dJNWNWvVHSOHd 9 6 w104 017 9 owebues 5 9 1 UN 01 104 9 yu 9 6 XU 3 201 201
18. FUNCTIONS NORMALLY LIST OF MALFUNCTIONS POSSIBLE CAUSES 1 Delivery of hot water for domestic use Air in the secondary exchanger when the tap is turned on the burner goes out Hot water pressure switch is defective 3 way valve is defective 2 Delivery of hot water for domestic use 3 way valve is defective the radiatores are heated in summer mode 3 Delivery of hot water for domestic use Check sensors for domestic and heating water water temperature is not satisfactory Check gas settings and regulation Check water flow rate Check secondary exchanger 4 Delivery of hot water for domestic use Primary exchanger IS defective noisy operation low water pressure in heating system Check gas settings and regulation Check ntc sensor for domestic hot water 5 Drop increase in pressure in primary circuit Check for leaks in heating circuit Defective water supply inlet valve Secondary exchanger is defective Expansion vessel is empty 6 Repeated shutdowns Detection electrodes are defective Check gas settings and regulation Check electrical circuit for flame detection 7 Safety thermostat is triggered repeatedly Faulty contads N T C sensors heating hot water Defective poorly calibrated safety thermostat Presence of air in the primary water circuit When the cold water tap is turned off the Drop in pressure in the water mains resulting boiler comes on in
19. J JddJ 997208 x 44 o 953045 O 46 o 952981 47 JP GB cabe o 1 1 952610 57 1 572990 58 Eaninletgasket o 1 5733433 72 02071 pressure switch j 57162 175 Eastening spring o o 570717 84 379079 jAutomaticairreleesevave j 564254 85 3164230 Gasket o 1 1 1 569887 87 J jOrng C 1 571449 89 Secondaryexchanger plate type exchanger 27kW _ 1 573295 90 jOding secondaryexchanger o 1 57385 92 J Jl oring 0 48 o j 571807 95 3164282 3 _ 1 57351 O 96 C J J 997151 99 jOwing i3 571965 100 jGasket o 1 1 574279 Y 101 J SIT Sigma 5742822 107 Sparkgenerator O 574233 111 379981 electrode o 1 1 573441 115 164261 1 569390 117 379979 lgniionelectrode R H j 569560 118 379980 llgniionelectrode LH 56951 1194 X Maibuner o G 99880 O 1198 1 o J 998111 120 J 5728855 120 J
20. A suitable terminal guard is available from TOWER FLUE COMPONENTS Morley Road Tonbridge Kent 9 1 The minimum acceptable spacing from the terminal to obstructions and ventilation openings are specified in Fig 2 6 TERMINAL POSITION 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 60 100 mm Y B004 11 In addition it is also possible to use a split system by fitting a special adapter to the flue discharge collar and using one of the apertures for the air vent intake located on the top part of the combustion chamber A
21. 12 Check of domestic hot water production efficiency delivery rate and tem perature 13 Check of the general performance of the unit 14 General check of the discharge ventilation of the combustion by products B004 MISCELLANEOUS 6 A 9 EN So SS 6 UO peseg Ege l m lt O zi 0 A gt an l lt BE O l z E Remove internal time clock plug from the the P C B then connect TYPICAL JUNCTION BOX room stat terminal block on the reverse of the boiler control panel see section 2 10 to 9 10 on the junction box lt e 5 rcu I 0906 pue d 0208 8 0 1 ur 216 226 11 9 1 AN 6 v G 44 0 9 6 0 Xu Lap 13 AunS ejeuog Auoudu g 8 7 001 06 dS dIAUNS 191 9 9 6 XUI 4 017 9 6 9 1 Mur 201 LOZ 9 4 Xur 6609 9 6 YUN 3 201 201 1005 0063 GT UT 0006 000944 Jgpum u y JABOJIIN 9 10081 puteis WIOMMOIE 149 9 SIpUE 8 0 XU 135 449 Gey UUELNSIOH 9 G 2001 8669 LS T6360B ROOM THERMOSTAT gt
22. 378978 SITTandemgasvalveoperatorcoio 570712 322 378815 SITTandemmodurgcoill OJ 534 323 164303 _ Gas modulator cartridge 1 573745 361 JHeaingbypasskt o 5144 362 D H W pressureswitch kt Z 571442 363 Bway springkt 571447 3684 DHMW diaphamvave 571446 3731 flow switch diaphram 571547 372 J Mainflowswich magnet o o 571772 3 3 X J Mainflowswichsping 571771 3 4 X JJMainflowswichtopcap 571770 375 Mainflowswithreedsystem o 57381388 381 1 30 full kit 998152 382 jBumerjetO77fulkt LPG 998432 40 005 GENUS 27 SYSTEM SIT Tandem Gas Valve DRE 1 Expansionvessel 573294 11 164225 Gasket 3 4 5738920 14 Oveheatthermstat 1 997206 X 17 Motorised valve motor 997147 0 20 Mainflow 5324 21 164338 Temp probe 1 569236 23 164229 1 2 5735928 25 378814 Manualventcock 5793727 206 jSafeyvave3bart 2 573172 28 997274 30 571649 3 Timedok 1 997208 X 45
23. electrode L H 118A Main burner 118B burner 1180 E02078 569390 569560 569561 572271 572277 0 2343 E02 078 Main burner Expansion Gasket 3 4 o Overheatthermostt Main flow Switch 164 338 569236 Microswitch for 3 way main flow group 573340 2 573528 24 573727 JSafetyvave3bari 2 000000 573172 jPressuegauge o N 571649 Jrmedock 0 0 0 997208 953045 EAMEE 952981 00000000 952610 56 Fan 00000000 572989 5600 jra 572990 Faninletgaske S O 573343 sd Venturi exhaust manifol header 00000000 573314 71AB 571651 71CD 571652 Fasteningspring 570717 83 564254 569387 Oring O 571449 88 8 Secondary exchanger plate type exchanger 23kW _ 571646 8800 Secondary exchanger plate type exchanger 27kW 573295 1 secondary exchanger N 573825 2o 1g8Orng 571807 573521 95AB Pump 997150 95CD 997151 Oring 13 571965 po Gasket 00000000 574279 SITSigma 574232 Sparkgeneratonp 574233 110 573441 Gasket 1 4 Main burner S Mainburner Main burner Main exchanger 0 000 w co o o o co o co 02 02 co oo 4 180 9 1 572372 119AB Main ex
24. 8 978 3 8 815 164 303 164 311 CO 005 NOTES 42 B005 005 43 Manufacturer Merloni TermoSanitari SpA Italy Commercial subsidiary MTS GB LIMITED MTS Building Hughenden Avenue High Wycombe Bucks HP13 Telephone 01494 755600 Fax 01494 459775 Technical Service Hotline 01494 539579 5399841267 000 BOOS Stampa Bieffe Recanati
25. Curas 60 70 00 F o o O OO amp GENUS Warning the flue analysis mode must only be selected by a qualified service engineer B004 21 3 4 Initial Start up The checks to be run before initial start up are as follows 1 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 appro priate 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 pressing the On Off switch lt L gt the L E D I will turn on turn the selector knob to the winter setting This will start the circulation pump After 7 seconds the boiler will signal a shut down due to failure ignition 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 the 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
26. MFFI In this case the minimum length for the air intake pipe is 1 meter the maximum length of vertical exhaust pipe must be a maximum of 12 m 3 If an elbow is inserted into the discharge ventilation system the calculation of the overall extension must take into consideration the values for each curve as indicated in the table 4 The exhaust pipe must extend at least 0 5 m above the ridge of the roof if it is located on a side other than that for the air intake this is not obligatory if the exhaust and air intake pipes are located on the same side of the building 16 Jo 14 001 09 9 9 amp 0 gt 11 0 gt 1 gt 1 001 09 9 90 gt 11 0 gt 1 gt 1 001 09 9 u 90 gt 11 90 gt 1 90 gt 1 Z6 ES UOISU91X3 uinuulxe y ed L1sneux3 Jo 51 uo 1019 459 Jo esf D E 4 2 10 Room Thermostat In order to perform this procedure remove the boiler casing as indicated in Connection section 3 2 Then proceed as follows Remove the two screws A in order to remove the cover release the two clips and lift and rotate down the control panel box Open the cover on the left hand side of the compartment Insert the wire for the connection of the room thermostat into the cable clamp 0 as indicate
27. device that automatically lights the main burner when the temperature in the delivery line to the system drops below 5 C The boiler will continue to operate until the temperature in question reaches about 58 C This device is activated on a properly operating boiler if the system pressure is between the acceptable values the power supply to the unit is on the unit is supplied with gas This feature is enabled also when the boiler is in summer operating mode 6 Safety Shut off At the start of every lighting 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 hot 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
28. 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 sect 3 4 and run it until the temperature has reached the boiler operating temperature The system must then be immediately flushed through The flushing procedure 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 proble
29. then lift the panel up and away from the boiler au mios ban Ei ESL DTP d md da bet a i E E a mma P TUE NA rire iiA a TE 3 Ri I4 O77 AEG VE mam mm 2 x a ne mne ei ne a et n put 005 1 3 Access to the Combustion Chamber Removing the sealed chamber frontal cover Removing the burner and the injectors 1 Remove the side panels of sealed chamber fig 1 8 2 Remove the screws F of the burner see fig 1 9 3 Remove the burner see fig 1 10 4 Remove the injectors using a No 7 socket spanner 5 Replace in reverse order 005 Removing the combustion cover Removing the electrodes 1 Remove rubber gasket see fig 1 11 2 Disconnect ignition leads by pulling downward see fig 1 12 3 To remove the flame sensor disconnect the cable at its only connection point close to the P C B see fig 1 13 5 Remove screw H using a Philips No 2 star tip screwdriver see fig 1 14 6 Slide the electrode gently downward see fig 1 15 ww viec X ie RH num
30. which can range from the minimum thermal power to the maximum 18 mbar 19 mbar the potentiometer for the maximum thermal power for the heating system maximum thermal power setting factory set at the maximum value unless indicated otherwise on the adhesive sticker located in proximity to the potentiometer The connection to the diagnosis device TCS TCS2 The boiler is designed to make it easy to analyse the combustion by products Using the especially designed apertures readings can be taken on the temperature of the combustion by products and of the combustion air as well as of the concentrations of Oz and etc The best maximum power test conditions for the heating system are when the selector C is turned to the flue analysis setting The discharge ventilation of the exhaust fumes can be monitored to check for losses in general pressure in the system This is done to eliminate the cause of lighting failure with the main burner not indicated by a shutdown status With a differential manometer connected to the test socket on the combustion chamber the DP value for the air pressure switch can be taken The measured value should not be less than 10 mbar under maximum thermal power conditions with the knob C on the flue test setting in order for the unit to function properly and without interruption 23 3 8 3 9 24 Boiler Safety Systems Draining the System The boiler is equipped with th
31. 1 There is sufficient water in the system 2 The gas is turned on 3 The electricity to the boiler is on Press the On Off Button THE LIGHT FOR THE POWER SUPPLY COME ON Je eck the tuses 2 Check the power supply cord plug and SETTING FOR THE OPERATING IS HOT WATER BEING WATER BEING DEMANDED DEMANDED FOR BOILERS EQUIPPED WITH AN ELECTRONIC ANT FREEZE TIME CLOCK SYSTEM HAS THE SAFETY BEEN AND ORROOM TRIGGERED ACTIVATE THERMOSTAT NEED THE DEVICE TO BE ACTIVATED T sensor lt 5C FOR BOILERS EQUIPPED WITH AN ELECTRONIC ANI FREEZE SYSTEM HAS THE SAFETY BEEN TRIGGERED ACTIVATE THE DEVICE T sensor lt 5C 21 B005 for air in the 2 Check the pressure switch for activating pump 3 Check replace pressure gouge and refill the the system properly 1 Tum the boiler off and then back on again safety reset DOES THE CIRCULATION PUMP COME ON DOES THE INSUFFICIENT WATER ON within 40 sec POWERTO THE PUMP 1 Check 2 Chek reolace wire to P CB Tm 3 Replace eck fo see If pump 15 Wer SU stuck 2 Replace circulation pump 4 en ace control 5 Check micro switch when hot water is requested 22 005 DOES THE FAN COME ON NO3 1 lt gt Ms NO i 1 Check replace differ
32. 4 63 62 61 60 59 58 57 56 gt 17 18 1920 21 22 2324 25 26 27 28 29 30 31 32 33 34 35 3 G ARISTON GENUS 23 27 30 005 GENUS 30 MFFI SIT Sigma Gas Valve 76 28 29 3031 32 33 34 35 3637 38 G ARISTON GENUS 30 MFFI 005 31 GENUS 27 RFFISYSTEM SIT Sigma Gas Valve 58 70 DS 550 28 29 30 31 32 33 34 35 363738 39 G ARISTON GENUS 27 MFFI SYSTEM 32 005 GENUS 23 27 MFFI SIT Sigma Gas Valve Description ASIN Key G C part no 1 0 3294 0 3520 997206 573224 Expansion vessel 164225 Gasket 3 4 thermostat 164338 1 164 225 1 Main flow Switch 18 3 114 Gasket 1 4 116 gnition electrode R H 117
33. 8814 Manualventcock 573727 25 PSafeyvalve3bari 2 O 9578172 28 Presuegauge 571649 3 Pimecock 997208 43 1 9539045 45 JJPRCB EIAMFF BE 952981 46 cabe 9526100 56AB Fan 8572989 56D Fan 5290 v 57 fFaninetgasket N 978343 60 Venturi exhaust manifold header 9573314 71AB 03818 lAirpressueswith 54161 571652 74 Faasteningspring 570717 564254 569387 po Oring 571449 88 exchanger plate type exchanger 23kW _ 571646 88CD Secondary exchanger plate type exchanger 27kW 573295 S 164282 83 84 573825 571807 573521 997150 997151 570732 573023 571965 573441 569390 569560 164 282 Gasket 3 8 EEE 96CD 8379976 Gasvale SlTTandem 101 Sparkgenerator C C C O 104 10400 13 C 112 379981 jDetectionelectrode O 116 164261 jGasketi A o 118 379979 jlgniionelectrode RH 119 379980 jlgniionelectode LH 569561 120 02026 O 572271 1208 jJMaibumer 572277 1200 02078 Mainbumer C C C o Z o Z o 572343 i200 X 1 572372 121 jMai
34. 900000999952 i J 79111 97 ile 109 t r u ap JIL R BHS zu 16 17 18 1920 21 22 232425 26 27 28 29 3031 32 33 34 35 36 37 G ARISTON GENUS 23 27 MFFI 36 005 GENUS 30 MFFI SIT Tandem Gas Valve 72 71 64 70 69 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 3637 38 G ARISTON GENUS 30 MFFI 005 37 GENUS 27 RFFISYSTEM SIT Tandem Gas Valve 58 Ne 1 2 an is 19 20 212223 2423 25 26 27 28 N 5f o GENUS 27 MFFI SYSTEM B005 GENUS 23 27 MFFI SIT Tandem Gas Valve 1 Expansion vessel 8573294 11 164225 Gasket 3 4 9735920 14 POvemeatthermostat 997206 17 Main flow Switch 1 5324 18 164338 Tempprobe C H W 569286 19 C Microswitch for 3 way mainflowgroup 573340 23 164229 Gasket 1 2 1 9735928 24 3
35. H W Flow Minimum Rate Pressure of Domestic Hot Water Expansion Vessel Capacity Expansion Vessel Pre load Pressure Maximum Water Content in System Maximum Heating Pressure Nominal Pressure Natural Gas G20 G25 Liquid Gas G30 G31 Electrical Supply Power Consumption Protection Grade of Electrical System Internal Fuse Rating Weight ppm mbar bar max min C max min C l min gal min l min max min bar bar bar mbar mbar V Hz W IP 2 2 3 32 0 32 0 39 2 02 2 00 137 5 8 9 2 32 20 25 30 37 230 50 150 X4D i 2 AT 3 16 3 86 0 37 0 45 2 35 2 32 128 6 6 8 0 34 20 25 30 37 230 50 190 X4D 2 3 16 3 86 0 37 0 45 2 35 2 32 128 6 6 8 0 34 5 200 0 25 20 25 30 37 230 50 190 X4D 2 46 5 3 49 4 05 0 41 0 47 2 60 2 57 135 7 5 8 0 49 20 25 30 37 230 560 190 X4D 2 G C Number 47 116 08 47 116 09 41116 01 47 116 13 Calculated at 70 maximum output 4 B004 1 3 Overall View GENUS 23 27 30 MFFI GENUS 27 RFFISYSTEM 24 23 22 I 21 20
36. Installation Instructions Type Boilers G C N 41 116 01 47 116 08 47 116 09 47 116 13 LEAVE THESE INSTRUCTIONS ADJACENT TO THE GAS METER ARISTON Country of destination GB TABLE OF CONTENTS 2 9 GENERAL INFORMATION General Instructions Technical Information 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 6 1 6 2 COMMISSIONING Initial Preparation Removing the Casing Control 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 Ariston Unvented Cylinder 4 1 1 1 4 GENERAL INFORMATION General Information 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 unit contained in this manual as they provide important information regarding the safe installation use and maintenance of the product For o
37. ating plate 4 Adjust the maximum thermal power setting Methane Gas Liquid Butane Gas Liquid Propane Gas G30 G31 Recommended Soft light Pressure mbar B004 25 5 26 MAINTENANCE 5 Adjust the soft light feature 6 Adjust the delayed lighting feature for the heating system can be set from 0 to 2 mins It is recommended that the following checks be made on the boiler 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 flue gas see ref 3 6 and cleaning of the burners if needed 5 If called for by check no 3 dismantling and cleaning of the combustion chamber 6 If called for by check no 4 dismantling and cleaning of the injectors 7 Visual check of the primary heat exchanger check for overheating in the blade assembly clean the exhaust fan if needed 8 Adjustment of the flow rate of the gas flow rate for lighting partial load and full load 9 Check of the heating safety systems safety device for maximum temperature safety device for maximum pressure 10 Check of the gas safety systems safety device for lack of gas or flame ionisation detection electrode safety device for gas cock 11 Check of the electrical connection make sure it complies with the instructions in the manual
38. c Flame Detector Gas Valve Overheat Thermostat Heating Sensor Diverter Valve Motorised Valve Main Flow Switch Including Safety Pressure Switch for Primary Circuit Automatic By pass Microswitch for Diverter Valve Sensor for Domestic Hot Water Domestic Water Inlet Filter Drain Valve Safety Valve Water Pressure Gauge Circulation Pump with Automatic Air Valve Expansion Vessel Central Heating Flow Domestic Hot Water Outlet Gas Inlet Domestic Cold Water Inlet Central Heating Return Cylinder Flow Cylinder Return 3 3 1 3 2 20 COMMISSIONING Initial Preparation Removing the Casing 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 point 3 2 for further information Open the central heating flow and return cocks supplied with the connection kit Unscrew the cap on the automatic air release 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
39. changer 572749 119CD Mainexcanger o oO Z 572835 Frontpanelrunnerkit o o 571993 31 DiH W iactuatorkt O Z o O 571444 SIISigmagas valve operatorcoils 997029 361 Heatingby passKit o 571443 CLD HW pressure switch O 571442 33 O 571447 diaphram o Z o Z 1 1 1 571446 371 Main flow switch diaphram O 3 amp 3 571547 dMainflowswith magnet o 571772 Main flow switch spring O o 571771 Mainflovswithtopcap 1 1 1 571770 35 Main flow switch reed system o n o 573138 569281 382 jBurnerjetO 72 fult LDPG 569282 UE LLL 005 Q Q GENUS 30 MFFI SIT Sigma Gas Valve 34 Ke G C part Description 1 Expansion vessel 573294 11 164225 Gaskt34 573520 15 Overheatthermostat 997200 16 JMaiflwSwich A9 j 1 532 O 139 16433 C H W 569236 20 Microswitch for 3 way main flow group 573340 24 164229 Gasket 1 1 1 1 573528 25 378814 573727 26 JSafeyvave3bari 7 o o 578172 O 29 g Presuegauge o 571649 32 A J _ o A
40. 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 5 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 sect of the servicing manual BON o 3 5 Operational The boiler was designed to make regulation easy To access the adjustment Adjustments and control area simply remove the cover by unscrewing the screws A and C and lift up the small service panels B1 and B2 respectively The first provides access to the control low voltage P C B while the second makes it possible to work on the power supply P C B The service panel B2 also provides access to the power supply cord connector the fuses the selector knob for continuous operation of the circulation pump The service panel B1 also provides access to the potentiometer for regulating the ignition delay anti cycling feature which can be set from 0 to 2 minutes factory set at 1 minute 22 4 3 6 Combustion Analysis 3 Fume Discharge Monitoring B004 the potentiometer for regulating the soft light feature the setting for
41. d in photo 3 1 2 3 8 9 Remove the grommet E shown in the photo 4 make a hole in it and pass the room thermostat wire through Hemove the link located in the terminal block and connect the wire Replace the grommet and the terminal block to their original positions close the cover on the grommet compartment and fasten the wire clamp D in place If a remote time clock is to be fitted disconnect the integral time clock plug from the P C B Using a volt free switching time clock connect the switching wires from the time clock following points 1 6 above If using a time clock and room thermostat these must be connected in series as per points 1 8 above Note Only a two wire type room thermostat can be used B004 For details on fitting the D H W probe Genus 27 RFFI only please consult the separate instruction sheet supplied with the probe An anti frost device is built in to the appliance s electronic regulation system 19 2 11 Electrical Diagram 16 Legend High Voltage P C B Low Voltage P C B Remote Connector Kit Flame Failure L E D Insufficient Water Pressure L E D Water Temperature Indicator L E D s Overheat Thermostat Warning L E D System Reset Button Selector Knob for Operating Mode Domestic Hot Water Temp Adjustment Central Heating Temp Adjustment Wire Connector for Room Thermostat Connector for Total Check System Selector for Local Re
42. e following safety systems see section 3 3 for references 1 Ignition Failure This control signals an ignition failure on the burner 7 seconds after a lighting failure The L E D B will turn on to signal the shutdown status The system can be reset by pressing and releasing the button A after checking to make sure that the gas valve is open Repeat this process until the burner lights 2 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 it shuts off the boiler and lights the L E D The system can be reset after the pressure has been brought up to the proper level by using the On Off switch L 3 Overheating This control shuts off the boiler in the case where the primary circuit reaches a temperature in excess of 110 C The L E D will come on to signal this shut off status After the system has been allowed to cool the system can be reset by pressing the button A 4 Limescale Build up This is an indirect control actuated through the regulation of the temperature in the primary heat exchanger on the formation of limescale in the secondary heat exchanger Regardless of the flow rate and the temperature in the circuit for the domestic hot water the temperature is limited to 62 C 5 Anti frost Device The boiler is equipped with a
43. e the gas pressure ignition pressure partial flame maximum flame 9 Check proper operation of the heating safety system maximum safety temperature maximum safety pressure 10 Check the proper operation of the gas safety system gas or flame safety device gas valve safety device 11 Check that the electrical connections have been made in compliance with the instructions shown in the Installation Instructions 12 Check the efficiency of the hot water supply flow and temperature 13 Check general operation of the appliance 14 Check the exhaust system for the combustion products 1 2 Technical Information CE Certification Heat Input max min kW 25 6 11 0 29 8 12 0 29 8 12 0 33 0 12 0 Heat Output max min kW 23 1 9 2 27 3 10 1 27 3 10 1 30 3 10 2 Efficiency of Nominal Heat Input 90 2 91 6 91 6 92 0 Efficiency at 30 of Nominal Heat Input Heat Loss to the Casing T 50 C Flue Heat Loss with Burner Operating Flue Heat Loss with Burner Off Maximum Discharge of Fumes G20 G25 Residual Discharge Head Consumption at Nominal Capacity G20 G25 Gas Consumption after 10 Minutes 15 C 1013 mbar G30 G31 Temp of exhaust fumes at nominal capacity G20 G25 CO Content O Content CO Content Minimum Ambient Temperature Head Loss on Water Side 3 20 Residual Head of System Heating Temperature Domestic Hot Water Temperature D H W Flow Rate 3T 35 D H W Flow Rate 3T 35 D
44. ection cover see fig 1 51 2 Remove fuse see fig 1 52 Removing the time clock 1 Remove left hand inspection cover see fig 1 53 2 Remove electrical connection A5 of the clock see fig 1 54 3 Unscrew A6 and remove see fig 1 55 N B is possible to by pass the time clock in the event of failure by simply unplugging the electrical connection from the P C B see fig 1 54 This will revert control of the central heating to the room stat connection on the reverse of the control panel 19 20 Removing the P C B s 1 Isolate electricity 2 Remove the front cover of the boiler 3 Remove both left and right inspection panels 4 Remove the pressure gauge cover 5 Remove the mounting screws A7 see fig 7 51 6 Disconnect the connection cable A8 see fig 1 52 7 To remove the 24V P C B remove the electrical plug connectors and screws A9 see fig 1 53 8 To remove the 240V P C B remove the electrical plug connectors and screws A10 see fig 1 54 9 Replace either P C B in reverse order 005 2 1 FAULT FINDING is possible to detect and correct any defect by using the standard fault Fault Finding Guide finding diagrams described in this chapter Flow chart Preliminary Checks Make sure that
45. ential pressure switch for pump IRUNE eea SAL ACTIVATED YES Chee replace F C B wire eck lace power ape p 5 Check replace control P CB 1 Check replace air pressure switch wiring Check wheth button is stuck 3 Check replace flame detection electrode INTERNAL SAFETY DEVICE FOR PCB ACTIVATED 1 Check replace wirin i 4 idee PCB wire 3 Check fepl supply P C B 4 e cias control P C B 5 Check replace air pressure switch IS THERE POWER TO THE FAN YES se B005 23 IS THE AIR PRESSURE SWITCH ACTIVATED ARE THE FUMES DISCHARGED CORRECTLY DOES THE BURNER LICHT SHUTDOWN OF THE BOILER ACTIVATED 1 Check flue discharge 2 Check venturi amp small pipes 3 Check wire for air press switc 4 Check replace air press switch 5 Check replace P C B wire 6 Check replace power P C B Check replace control P C B 1 Check replace ignition electrodes 2 Check wiring eck small wire 5 Check power supply P C B 6 Check control PCR 1 Check supply of gas fo gas valve 2 Check ly P C B NO 3 Check control P C md 4 Check functionality of the gas valve 1 Check whether flame n meo 15 YES 2 Er 3 Check the power A Check the control P C B WAS THE NO RESET SWITCH PRESSEDe YES Restart ofthe fan 24 005 IS THERE STILL A PROBLEM
46. for the installer so that the unit may be installed correctly and safely The installation and initial startup 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 the 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 1 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 Electricity 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 2nd 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 Regulat
47. hin the control panel as follows The yellow green wire should be connected to the terminal marked with the earth 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 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 27 Gas Connection The local gas supplier contractor connects the gas meter to the service pipe If the gas supply for the boiler serves other appliances ensure that an adequate supply is availab
48. ig 2 2 4 7 25 Mounting the Appliance Fasten 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 26 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 data table 1 2 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 wit
49. ions 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 needed for an 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 B004 2 3 Overall Dimensions GENUS 23 27 30 MFFI
50. ipped with a potentiometer which delays the ignition of the heating control and is situated on the P C B see the electrical diagrams By adjusting the potentiometer it is possible to change the time interval between the burner shutting down and its next ignition It is preset at 1 minute and can be adjusted from 0 to 2 minutes Anti cycling Soft light Heating Use this control in particular situations where continuous shutting down and S L GK ignition of the main burner occurs Removing the spark generator SIT Sigma gas valve 1 Disconnect ignition leads Q by pulling upwards see fig 1 25 2 Remove the screws R see fig 1 26 with a Pozidrive No 2 star tip screwdriver 3 Remove the spark generator 12 B005 005 Removing the spark generator SIT Tandem gas valve 1 Disconnect ignition leads Q1 by pulling upwards see fig 1 28 2 Remove the screws H1 see fig 1 29 with a Pozidrive No 2 star tip screwdriver 3 Remove the spark generator 13 1 5 14 Removing gas valve 1 Disconnect all the cables from the solenoid and modureg 2 Remove the spark generator 3 Release the top nut S using a 30 mm open ended spanner see fig 1 31 4 Remove the screws T from the bottom of the gas valve pipe see fig 1 32 Attention The gas valve i
51. ir Pressure Switch Removing the Venturi Device Removing the Fan 1 4 Servicing and Removal of the Gas Valve Setting Gas Pressure Removing the Spark Generator SIT Sigma Gas Valve Removing the Spark Generator SIT Tandem Gas Valve Removing the Gas Valve 1 5 Access to the Hydraulic Circuit Removing the D H W Secondary Exchanger Removing the Safety Valve Removing the Automatic Air Vent Removing the Main Flow Circuit Switch Removing the Pump Removing the Pressure Gauge Removing the 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 Diverter Valve Genus 27 RFFI Only 1 6 Access to the Control System Checking the Fuses Removing the Time Clock Removing the P C B s 2 FAULT FINDING 2 1 Fault Finding Guide Flow chart 2 2 Fault Finding Using the Total Check System 3 ELECTRICAL DIAGRAMS 3 1 Electrical Connection 3 2 Functional Flow Connection 4 SHORT SPARE PARTS LIST Page No C NNOO 14 15 15 15 16 16 17 17 17 18 18 19 19 20 21 26 27 29 30 005 1 1 1 2 SERVICING INSTRUCTIONS Replacement of Parts To Gain General Access 5 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 a
52. le 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 8 4 2 8 Water Connections GENUS 23 27 30 MFFI E c B e M i i L Fig 2 5 273 Fitting the connection kit to the Genus 27 RFFI System only It will be noted that the kit has two connections not required for this boiler i e the domestic cold inlet E and the domestic hot water outlet B see fig 2 4 Although the cold water main supply must be connected to the isolation valve for the purpose of operating the filling loop the isolation valve is NOT connected to the boiler and should be left in the OFF position The D H W outlet is capped off on the boiler therefore not requiring the isolation valve to be used The Genus 27 System has 2 x 3 4 B S P male threads for the cylinder flow and return It is recommended that 2 x 22mm x 3 4 female iron fittings not supplied be used on these connections using P T F E tape before the boiler is mounted on the wall B004 28 Mc View of the Boiler Connections GENUS 27 RFFISYSTEM Legend A Central Heating Flow B Domestic Hot Water Outlet C Gas Inlet D Domestic Cold Water Inlet E Central Heating Return F Cylinder Flow G Cylinder Return Safety Va
53. lve 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 valves 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 downwards on the exterior of the building in a posi
54. mote Control Anti cycling Device Adjustment for Heating Soft light Adjustment Max Heating Temperature Adjustment Time Clock Connection On Off L E D On Off Switch Interface Wire for P C B s Relay Motorised Valve Ignitor Relay Gas Valve Relay Fan Relay Circulation Pump Relay Selector TCS2 Link for Continuous Pump Run Adaptor British Gas use only BPN lt XS lt CHVIHOVOZZTA TIOnNMOOUPUD lI A01 Air Pressure Switch A02 Fan A03 Gas Valve 04 Ignitor 05 Motorised Valve 06 Circulation Pump 07 Detector 08 Earth Terminal 09 Flame Detection Circuit A10 Flame Indicator L E D 11 Transformer 12 Filter BO1 Over Heat Thermostat 02 External Thermostat Gas Valve Modulator 04 D H W Probe Sensor Cylinder SYSTEM models only B05 Heating Sensor BO6 Pressure Switch for Heating Circuit 07 Microswitch for Diverter Valve MFFI models only Colours Gry Grey Rd Red Bl Blue Grn YIl Yellow Green Wh White Brn Brown Black Wh Rd White Red B004 GENUS 23 27 30 MFFI a CN 101 Q iQ m D 70 8 CN 100 onm
55. ms to the pump or other components The use of an inhibitor in system such as Fernox MB 1 or equivalent is strongly recommended to prevent corrosion sludge damaging the boiler and system Failure to carry out this procedure may invalidate the appliance warranty To dismantle the front part of the casing proceed as follows 1 Loosen the two screws F located on the bottom part of the boiler until the first thread on the screws appears 4 2 Lift the front panel up until it stops after the click 3 Remove the front panel from the rest of boiler casing 4 Unhook the two cords from the location slots 3 3 Control Panel GENUS 23 27 30 MFFI A Ignition Lockout Reset Button Safety Overheat Thermostat Reset A BODE 0 D D Ignition Lockout L E D C Selector Knob for If Mf _ Summer Winter Flue Analysis Modes O D Low System Water Level L E D E Temperature Adjustment Knob GENUS for Domestic Hot Water F Heating System Thermometer G Safety Overheat Thermostat GENUS 27 RFFI SYSTEM Intervention L E D U H Adjustment Knob for Heating Temperature On Off L E D GH OW On Off Switch T m _ O System Pressure Gauge
56. nd electrical supplies to the boiler are isolated and the boiler is cool Before and after servicing a combustion analysis should be made 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 The life of individual components vary 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 All testing and maintenance operations on the boiler require the control panel to be lowered This will also require the removal of the casing To dismantle the front part of the casing proceed as follows 1 Loosen the two screws A located on the bottom part of the boiler until the first thread on the screws appears Fig 1 1 2 Lift the front panel up until it stops with a click and remove the front panel from the rest of the casing Fig 1 2 4 Unhook the two cords from the locating slots Fig 1 3 Removing the bottom cover 1 Remove the screws Removing the side panels 1 Remove screws 2 Pull the panel away from the boiler
57. ne 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 oylinder 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 carriyng 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 seal of water connections replacing the gaskets if necessary 2 Check the seal of the gas connections replacing the gaskets if necessary 3 3 Check the general condition of the appliance and of the combustion chamber visually 4 Visual check of the combustion clean burners if necessary 5 With reference to point 3 dismantle and clean the combustion chamber if necessary 6 With reference to point 4 dismantle and clean the injectors if necessary 7 Visual check of the primary heat exchanger check for overheating of the exchangers fins clean the exhaust side of the exchanger and fan if necessary 8 Regulat
58. nexchangr C o 1 572749 1216 J Mainexchangr 572835 ss 571993 BEE 571444 378978 GEN 570712 573740 REND 573745 571443 571442 571447 571446 571547 571772 571771 BEEN 571770 573138 569281 569282 301 311 321 322 378 978 SIT Tandem gas valve coils 323 164 303 Gas modulator cartridge Heating by pass pressure switch kit DHW diaphramvalve 371 j Mainflowswith diaphram 372 Maeinflovswich A Mainflowswith spring JMainflowswithtopcap N flow switch reed system 381 382 Burner jet 0 72 full kit LPG w o co w o co Joo esl E 3 o o o o o gt c5 00 005 C3 GENUS 30 MFFI SIT Tandem Gas Valve em TER vessel 573294 11 164225 Gasket3 4 5735920 15 Overheatthermostat 997200 18 JMaiflowSwitch 573224 19 164338 Tempprobee C HW 569236 22 Microswitch for 3 way main flow group 1 573340 O 24 164229 1 2 573528 25 38814 Manualventcock _ 573727 206 jSafeyvave3bari Z 578172 29 X jRPresuegage Z 5716499 32
59. ning L E D System Reset Button Selector Knob for Operating Mode Domestic Hot Water Temp Adjustment Central Heating Temp Adjustment Wire Connector for Room Thermostat Connector for Total Check System Selector for Local Remote Control Anti cycling Device Adjustment for Heating Soft light Adjustment Max Heating Temperature Adjustment Time Clock Connection On Off L E D On Off Switch Interface Wire for P C B s Relay Motorised Valve Ignitor Relay Gas Valve Relay Fan Relay Circulation Pump Relay Selector TCS2 Link for Continuous Pump Run Aa Adaptor British Gas use only UJ N xz cdomovozzrcxaxc c rommoou 01 Air Pressure Switch AO2 Fan A03 Gas Valve 04 Ignitor 05 Motorised Valve 06 Circulation Pump 07 Flame Detector 08 Earth Terminal 09 Flame Detection Circuit A10 Flame Indicator L E D 11 Transformer 12 Filter BO1 Over Heat Thermostat BO2 External Thermostat Gas Valve Modulator 04 D H W Probe Sensor Cylinder SYSTEM models only B05 Heating Sensor BO6 Pressure Switch for Heating Circuit BO7 Microswitch for Diverter Valve MFFI models only Colours Gry Grey Rd Red Blue Grn YIl Yellow Green Wh White Brn Brown Blk Black Wh Rd White Red 27 GENUS 23 27 30 MFFI
60. nting plate 4 Remove screws P see fig 1 24 8 B005 14 Servicing and Removal of the Gas Valve SIT SIT SIGMA eme TANDEM 2 48 18 18 1 a 4 E IE B005 9 10 Setting gas pressures Setting the minimum and the maximum power of the 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 When you have completed this operation replace the screw A securely into its housing to seal off the gas 3 o 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 1 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 11 5 To set the minimum power disconnect a supply terminal from the modureg and adjust screw
61. om the rear see fig 1 43 2 ipM y B005 Removing the expansion vessel 1 Remove nut A3 away from the expansion vessel see fig 1 44 2 Remove nut A4 see fig 1 45 3 Remove expansion vessel see fig 1 46 005 Removing the overheat thermostat 1 Remove the electrical connector by the overheat thermostat see fig 1 47 2 Pull off the thermostat connections Then remove the thermostat from the pipe by releasing it s securing clip 7 Removing the heating temperature sensor N T C 1 Remove the electrical connector by pulling off the thermostat connections and unscrewing the sensor probe with a 14 mm open ended spanner see fig 1 48 17 18 Removing the D H W temperature sensor N T C 1 Remove the electrical connector by pulling off the thermostat connection and unscrew the sensor probe with a 14 mm open ended spanner see fig 1 49 Removing the diverter valve Genus 27 RFFI only 1 Remove the circlip and pull the diverter valve to the left 005 1 6 005 Access to Control System GENUS Checking fuse 1 Remove the right hand insp
62. perating instructions please consult the separate User s Manual User s Manual ARISTON 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 persons to use the appliance without supervision If you smell gas in the room do not turn on light switches use the telepho
63. ry 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 slow ignition 5 mbar 1 95 in w g 18 mbar 7 0 in w g 19 mbar 7 4 in w g B005 Regulating the heating power for natural gas G20 Regulating the heating power for butane gas G30 Regulating the heating power for propane gas G31 005 TABLE A GAS NOZZLE PRESSURE N O DN m Model 23 model 27 6 7 9 10 11 12 13 14 15 16 17 18 19 20 21 2223 24 25 2627 kW 567 8 9 1 OPERATING POWER 11 12 13 14 1546 17 18 19 20 21 22 23 kCal h x 1000 2 0 o W tc a N N o z o lt 5 ma model 23 model 27 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 24 25 2627 kW 1 1 1 567 8 9 OPERATING POWER 1 11 12 13 14 15 16 17 18 19 20 21 22 23 kCal h 1000 GAS NOZZLE PRESSURE a MOdel 23 model 27
64. s connected with the two pipes as shown with an O ring connection Access to Hydraulic Important Before any component is removed the boiler Circuits must be drained of all water Removing the D H W secondary exchanger 1 Remove the screw U see fig 1 35 2 Push the exchanger towards the rear of the boiler lift upwards and remove out of the front of the boiler 3 Before replacing the exchanger ensure that the O rings are in good condition and replace if necessary B005 Removing the safety valve 1 Loosen nut V see fig 1 36 2 Remove the valve Removing the automatic air vent 1 Unscrew valve W see fig 1 37 Removing the main circuit flow switch 1 Remove the cable of the main circuit flow switch 2 Remove the screws Y1 see fig 1 38 3 Remove the main circuit flow switch 005 15 Removing the pump 1 Unscrew Z and remove the electrical connection see fig 1 39 2 Release the nuts A1 and remove the pump see fig 1 40 Removing the pressure gauge 1 Remove the pressure gauge cover by pulling see fig 1 41 2 Release coupling A2 using a 14 mm open ended spanner see fig 1 42 3 Push the pressure gauge through the control panel fr
65. sible D H W temperature may be achieved throughout the year 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 mbar 700 60 gt 27 30 kW 400 300 23 kw 200 100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 Flue System 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 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 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 B004
66. tion 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 9 2 9 Connections 10 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 7 1 5 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 during servicing and initial filling in accordance with Water Supply Byelaw 14 is provided as an intergal part of the connection kit see fig 2 5 The flexible hose must be removed once the system has been filled The D H W inlet valve on the connection kit has two postions one for winter and one for the summer This enables the flow rate through the appliance to be adjusted so that a sen
67. water hammering 9 Temperature of radiators not satisfactory Check N T C sensor for heating Check by pass Check settings and regulation B005 2 2 Fault Finding Using the Total Check System Boiler Off 1 JAuto diagnostic state opark ignition state Boiler functioning normally Lockout 5 Boiler thermostat satisfied Hoom thermostat clock no demand or selector in summer setting Pump fed Main flow switch closed Air pressure switch N O Flame detected Water at required temperature Room thermostat clock no demand or selector in summer setting Auto diagnostics faulty D H W exchanger efficiency control Heating circuit efficiency control Heating temperature control D H W temperature control 26 Faulty ventilation system Air pressure switch stuck in N O position Faulty reset switch Faulty main circuit flow switch Faulty flame detection Faulty overheat thermostat Faulty exhaust fumes sensor Faulty heating sensor N T C Faulty D H W sensor N T C 005 3 005 ELECTRIC DIAGRAMS Legend gt II High Voltage P C B Low Voltage P C B Remote Connector Kit Flame Failure L E D Insufficient Water Pressure L E D Water Temperature Indicator L E D s Overheat Thermostat War
68. 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 B004 4 GAS ADJUSTMENTS CATEGORY 2 Methane Gas Liquid Butane Gas Liquid Propane Gas Lower Wobbe Index 15 C 1013mbar Nominal Delivery Pressure Minimum Delivery Pressure 23 MFFI Main Burner n 13 jets Consumption 15 C 1013mbar Consumption 15 C 1013mbar Gas Cock Outlet Pressure max min 27 MFFI 27 RFFI System Main Burner n 15 jets Consumption 15 C 1013mbar Consumption 15 C 1013mbar Gas Cock Outlet Pressure max min 30 MFFI Main Burner n 15 jets Consumption 15 C 1013mbar Consumption 15 C 1013mbar Gas Cock Outlet Pressure max min 1mbar 10 197column of water 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 ype of The boiler can be converted to use either methane natural gas G20 or Gas 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 r
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