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1310558d guide Cent. #FF19B.qxp

1. FUNCTIONING Control Panel 34 24 Display 27 Setting key 28 Setting key 29 Central Heating switch 30 Green indicator Central Heating mode ON 31 Central Heating temperature reducing key 32 Central Heating temperature increasing key 33 Green indicator Power ON 34 Orange indicator Burner ON 35 Red indicator Lock out flame failure 36 Reset key Switching on 1 Check that pressure in central heating system is above 0 7 bar and below 1 5 bar with the pressure gauge 16 2 Check that the gas service tap is opened at the gasmeter and main power is on Green indicator o Power ON 33 3 Open the gas tap 39 fig 21 The boiler is now ready to use Attention If the boiler stays a long time without working some air in the gas pipe can hinder the first lightings please refer to para graph 19 Incorrect Function Switching on Central heating Press on key 29 the green indicator 30 will light and the display will show the Heating flow temperature 15 Keys 31 and 32 allow to adjust the temperature required in the Central Heating system regarding the weather conditions press to increase temperature when weather is cold e press to reduce temperature when weather is fair During the temperature setting operation the
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3. Switching off the combustion rate control mode Locking conditions of the combustion rate control mode boiler in stand by mode room thermostat is not calling for heat room thermostat is calling for heat but the maximum temperature is reached boiler in lockout mode after a reset or if the main supply fails end of the mode if operator leave menu 5 after 15 minutes if there is no actions on keyboard Nota As soon as the combustion rate control mode is on Central Heating key is inactive DISPLAY 5 9 Adjustments and Settings continued CH heat output setting If you would like to change the setting of C H heat output please proceed as follow note the factory setting is 18 kW and the following explanation refer to menu 4 section 9 Z Switch to installer mode press key and on the Right side for 5 seconds The display shows 1 then 0 if there is default in the default register press 3 times on menu key the Left side to gain access to menu 4 The display shows 4 then the value set for section 0 00 or 01 respectively Action on burner only or pump and burner change for section 9 Adjustment of CH heat output Press on key Right side 9 times The display shows 906 which corresponds to the 18 KW which is the factory setting 9 section 9 06 18 kW press on setting key on the
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5. Left side once the 2nd and 3rd digits flash together Then press the key on the DHW or CH side to change the C H heat output steps between 00 and 10 Press on setting key to confirm the value The display stops flashing Setting procedure is finished To exit from setting mode leave the boiler for approx 1 minute then the computer will switch back to user mode After programming please close the door P fig 18 REGULATION FLOW SWITCHES Temperature regulation for C H circuit is controlled by 1 thermistor The C H Flow in Heating circuit is detected by 1 knob allows the adjustment of temperature between 35 and 85 C flow switche A piston with a magnet at the top operates a REED switch The Resistance value are piston is lifted by flow rates listed below 50000 at Flow rate threshold 2631 at C H 250 I h 20 l h 620 Q at 255 0 at ROUTINE SERVICING To ensure continued efficient operation of the appliance it is recommended that it is checked and serviced as necessary at reg ulars intervals The frequency of servicing will depend upon the particular installation condition and usage but in general once a year should be adequate It is the law that any service work must be carried out by a competent person such as your local Chaffoteaux Service Centre British Gas or other CORGI registered personnel in accordance with the current Gas Safety Installation and Use regulation Attention the air
6. display will flash If the room thermostat is calling for heat a dot will be displayed at the bottom of the 3rd digit Stand by mode A fixed digit at the centre of the display and the green indicator 33 on Putting the boiler in stand by mode and anti freeze system Press on key 29 Illl to switch off CH mode The green indicators 30 will stop During the all duration of the stand by mode an automatic anti sticking system will switch on the pump for 1 minute and make a movement of the 3 way valve each 23 hours The stand by mode will disable the anti freeze function of the room thermostat if fitted To leave the room thermostat anti freeze system operative please let the Central Heating mode on The boiler is equipped with an automatic anti freeze system which permanently on If the Central Heating temperature decrease bellow 7 C the pump will start If the Central Heating temperature decrease bellow 4 C the pump and the burner will start Turn off the boiler Press on key 29 to switch off CH mode The green indicators 30 will stop Switch off the main electrical supply Shut off the gas service tap 39 fig 21 Note In this conditions the anti freeze system is inoperative Central Heating Mode To be able to supply heating the mode should be switched ON Press on key 29 the green indicator 30 will light and the display will show the Heating Flow temperature Keys 31 and 32 allow to adjust
7. gas connection pipe between the gas valve and the burner should never open The seal can be checked only in the factory The service schedule should include the following operations Check the pressure in the system Check the correct operation of the appliance Check the correct operation of the gas controls Check the functions of safety controls Clean the electronic board of the fan located on the gas valve assembly and the different transformers in the sealed chamber Check combustion chamber insulation panels for damage Check the lighting and ionisation electrodes condition Clean the burner Never use metallic brush which can damage the stainless steel Clean the heat exchanger Never use metallic brush which can damage the stainless steel Clean the siphon and pay attention to the acidity of its contents Check the correct seal of the drain system Clean gas and water filters Check expansion vessel charge pressure Clean an check operation of safety valve Check the correct seal of the flue system Additional procedures that may be necessary Check the burner pressure and the gas flow rates Check clean or replace components as necessary Carry out combustion test utilising the test points in the flue turret Suggested sequence for servicing Before disconnecting or removing any part isolate the gas and electricity supplies Ensure that the appliance is cool and take care about the condensa
8. pressing the Reset key 36 Lockout procedure Flame disappearance When the ionisation electrode 8 does not detect flame presence The orange indicator led 34 extinguishes A lighting cycle starts If a flame is not detected before 10 seconds the safety solenoids will close The lockout red indicator 35 lights and the display shows the error code The pump continues to run After a few seconds it will become possible to reset the boiler by pressing the reset key 36 Overheat detection If an overheat over 100 C is detected in the primary circuit by the sensor 23 the safety solenoids close and the fan stops The orange led 34 extinguishes and the pump remains running for 3 minutes The reset will be possible when the primary temperature will decrease under 76 C CENTORA GREEN FUNCTIONAL DIAGRAM 5 ELECTRICAL WIRING DIAGRAM 1 1 purple purple Central heating control termistor orange orange Central heating flowswitch Overheat sensor wn N WIN a white lonisation probe green yellow Mass Main supply 230 V 50Hz 20 AN 77S Room thermostat Ignitor Generator Spark elec mA rodes 07 06 ee 03 01 ee Ignitor 08 07 06 05 04 0
9. 201 blue grey Gas valve purple red black yellow white Modulating fan Spark Generator ACTION CONFIGURATION Menu 1 Default register Record the last 10 defaults Section Digit 1 Digit 2 and 3 Last default occured 0 code from 01 to 99 Last but one default occurred 1 code from 01 to 99 code from 01 to 99 Last default occurred before the previous one code from 01 to 99 Note is displayed if no default is recorded Menu 2 Boiler conditions Indicates the conditions or the configurations of the boiler n Section Digit 1 Digit 2 and 3 i I Software version of display PCB 10 to 99 Flue type 1 FF variable speed ni lt x times Room thermostat is calling for heat 0 1 yes CH flow temperature in Celsius degrees from 00 to 99 Software version of main PCB 10 to 99 ACTION CONFIGURATION Menu 3 Boiler options Section Digit 2 and 3 Under floor heating system CONFIGURATION Menu 4 Boiler settings l 6 Section Digit 52191 an Room thermostat operation 0 Burner only 5 1 Burner and pump Pump speed 0 High speed 1 ou 1 Low speed Pump post circulation duration 0 0 min ca LM From 0 to 5 minutes by step of 0 5 min 0
10. 5 min Mu L3 LN un un of un co Maximum Central Heating flow temperature ig C3 C3 CH anti cycling delay From 0 to 7 minutes by step of 0 5 min en RE ERU CH maximum output limitation Model 24 From step 0 P 8kW Value from to step 10 P max 24 kW to 10 Model 30 From step 0 P 19 kW Value from to step 10 P max 28 kW 01010 un Ln m m f P 75 ACTION press once wait 5 iom c press once CONFIGURATION Menu 5 Combustion rate control mode Effect Display Combustion rate control mode OFF Switching on the combustion rate control mode Central heating output reach the maximum power set in menu 4 section 9 Central heating temperature is dis played in celsius degrees The 3 dots indicate that the combus tion rate control is ON at maximum output Switching the combustion rate down to minimum power Central heating temperature is dis played in celsius degrees The dot indicates that the combus tion rate control is ON at minimum output Switching on the combustion rate to maximum output set in menu 4 sec tion 9 Central heating temperature is dis played in celsius degrees The 3 dots indicate that the combus tion rate control is ON at maximum output
11. NA MAINTENANCE AND C amp M SERVICE GUIDE CHAFFOTEAUX amp MAURY C eEmCora Fanned Flue Condensing Central Heating System Boiler 24 and 30 Outer case dimensions Width 440 minimum space required 450 Height 850 Depth 380 24kW 405 30 kW 30 405 212121 Sefey valve center line Flue types Safety valve outlet J Heating flow C 13 C 33 53 L Gas supply All dimensions in mm N Heating return Technical Data 24 kW 30 kW 30 kW Heat gross input C H maxi 9 2 27 8 kW 10 4 31 6 kW Natural gas G20 Heat output C H 50 30 maxi 9 26 kW 10 30kW Gas rate C H max 2 64 m3 h 3 01 m3 h Heat output C H 80 60 maxi 8 24 kW 9 28kW Gas rate C H mini 0 87 m3 h 1 m3 h C H operating temperature 80 max 80 max Gas valve restrictor diameter without without C H circuit pressures Min operating 0 7 bar 0 7 bar Propane L P G G31 C H circuit pressures Max operating 2 5 bar 2 5 barr Gas rate C H 1 94 kg h 2 21 kg h Safety discharge 3 bar 3 bar Gas rate C H mini 0 64 kg h 0 73 kg h 0 7 bar 0 7 bar Gas valve restrictor diameter 4 40 mm 4 80 mm 5 44 5 44 230 v 230 v 150 w 150 w IP 44 IP 44 2 A 1 25 A 0 315 A 0 250 A 24v Pump and Expansion Vessel Characteristics Pump head available T 2 Central heating initial pressure when cold in bar Minimum flow rate with all h
12. TOR HEAD ASSEMBLY 1002653 e 572 PUMP UP 15 50 230V 1010612 e 607 IGNITER 1002105 20 e 615 PRINTED CIRCUIT BOARD 1310357 e 627 FUSE 250V 2A TEMPORIZED 1003456 e 628 FUSE 250V 1A TEMPORIZED 1003634 e 629 FUSE 250V 1 25A TEMPORIZED 1003635 e 630 FUSE 250V 0 315A TEMPORIZED 1307845 e 640 TRANSFORMER 1308149 e 805 PRESSURE GAUGE 1303158 e 938 PRESSURE RELIEF VALVE 1020933 e 15 This appliance is suitable for Natural gas or LPG A gas conversion must be made by a competent person Chaffoteaux amp Maury are continuously improving their products and therefore reserve the right to change specifications without prior notice and accepts no liability for any errors or omission in the information contained in this document Manufacturer Commercial subsidiary Chaffoteaux amp Maury France MTS GB Limited MTS Building Hughenden Avenue High Wycombe Bucks HP13 5FT Telephone 01494 755600 Fax 01494 459775 Internet www chaffoteaux co uk E mail info uk mtsgroup com Technical Support Help Line 0870 241 8180 Customer Service Help Desk 0870 600 9888 1310558d 12 2002
13. ain boiler as in step 11 Disconnect the electrical plug turn the top cover anti clockwise remove the O ring and the brass piston Reassemble in reverse order 16 Main heat exchanger Carry out step 1 and 2 as above Drain down the boiler as in step 11 Unscrew three screws securing the air gas con nection pipe onto the gas valve assem bly Disconnect lonisation and lighting electrodes from their wiring Unscrew six nuts to release combustion chamber front panel and pull the assembly towards you Undo the two clips of the pipes to the main exchanger and pull down the pipes Unscrew the three screws located at the bottom top left and at the right with the retaining system to be able to pull the main heat exchang er towards you Reassemble in reverse order taking care about the location of the gasket on the fumes collector and replace the neces sary gaskets 17 Pump Drain boiler as in step 11 Pivot the elec tical box downwards Open the electrical box cover removing the 2 screws Remove the pump plug from the power board and earth plug from earth socket Unscrew the nut F of the return pipe from the volute Remove the clip G on the pump volute and pull the pump toward you Reassemble in reverse order 18 Pressure relief valve The pressure relief valve can be ser viced from the front of the appliance Drain the boiler first undo the retaining Screw and pull out the valve R
14. ctrodes from their wiring Unscrew six nuts to release combustion chamber front panel and pull the assem bly towards you Reassemble in reverse order 4 lonisation electrode Carry out step 1 and 2 as above Disconnect ionisation electrode from its wiring Loosen the 2 screws and pull it out from the combustion chamber front panel Replace the ionisation gasket provided Reassemble in reverse order 5 Lighting electrode Carry out step 1 and 2 as above Disconnect lighting electrode from its wiring Loosen the 2 screws and pull it out from the combustion chamber front panel Replace the ionisation gasket provided Reassemble in reverse order 6 Burner Carry out step 1 2 and 3 as above Remove the 4 Philips screw retaining the burner onto the combustion chamber Pull it out with care to avoid any damage to the ceramic panel protecting the com bustion chamber front panel Replace the burner gasket Reassemble in reverse order 7 Gas vale assembly Carry out step 1 and 2 as above Unscrew three screws securing the air gas connection pipe onto the gas valve assembly Disconnect the connec tors from gas solenoids and fan Loosen the gas pipe nut Unscrew six nuts to release combustion chamber front panel and pull the assembly towards you Replace gas filter before fitting the full assembly back in the boiler 8 Fan assembly Carry out all operations mentioned in step 7 Unscrew the three screws secur ing the air gas con
15. eassemble in reverse order 19 Thermistor Drain the boiler as step 11 Disconnect the plug remove the retaining clip pull the thermistor out Reassemble in reverse order 21 Heating thermistor 20 Safety thermostat Remove the casing as step 1 and hinge down the electrical box as step 5 Disconnect the 2 cables pull out the sensor with the clip 23 Reassemble in reverse order 21 Spark generator Carry out step 1 and 2 as above Unplug the connector from the spark generator located on the right hand side of the main heat exchanger Loosen the two screws to remove the Reassemble in reverse order igniter 22 Main control board Carry out step 1 as above and hinge down electrical box by pressing the retaining tabs P on either sides Remove wiring cover C Undo the 4 screws of the electrical rear panel and remove it Unplug all cables from the PCB remove earth plug from earth socket Hang out the main PCB Reassemble in reverse 23 Display PCB Carry out step 1 as above and hinge down electrical box by pressing the retaining tabs P on either sides Remove the pressure gauge clip Rotate the elec trical box back in upper position Undo the 2 screws retaining the front panel put your two hands at the bottom of the front panel and pull it down to release it from the 2 clips Hinge down again the electrical box Undo the 4 screws of the electrical rear panel and remove it Unplug the display boa
16. eating thermostatic valves closed Gy Vp 700 400 9 600 800 900 1000 1100 C liter 0 750 40 60 80 100 120 140 160 180 200 220 240 260 GV high speed by pass closed System capacity chart GVO high speed by pass open Note The system initial pressure should be over the following value PV F low speed by pass closed System static height in metre 0 7 Initial pressure in bar PVO low speed by pass open 10 1 Steel chassis complete with expansion vessel not visible 2 Sealed chamber 3 Burner and heat exchanger assembly 4 Air gas connection 5 24 V modulating fan 6 Gas valve 7 Ignition electrode 8 lonisation probe 9 Ignitor 10 Combustion products manifold 11 24 V transformer 12 Siphon 13 Electrical box 14 Pump 15 Shunt plate 16 Pressure gauge 17 Silencer 18 Automatic air separator and automatic vent 19 Central heating flowswitch 21 Central heating control thermistor 23 Overheat sensor 37 Central heating flow isolating valve 39 Gas service tap 41 Central heating return isolating valve 43 Central heating pressure relief valve 46 User s guide 47 Connecting tails x3 48 Condensate drain 49 Adjustable by pass 50 Right hydraulic assy 51 Left hydraulic assy
17. nection pipe onto the gas valve assembly Separate the gas valve assembly and the venturi from the fan assembly by loosen the two hexago nal head screws Reassemble in reverse order and replace the necessary gas kets 9 Gas section Carry out all operations mentioned in step 7 Unscrew the three screws secur ing the air gas connection pipe onto the gas valve assembly Separate the gas valve assembly and the venturi from the fan assembly by loosen the two hexago nal head screws The venturi and the gas section can be separated loosing the 2 screw located at the top of the gas valve Replace necessary gaskets before reassemble in reverse order 10 Venturi in the gas section Carry out all operations mentioned in step 7 Unscrew the three screws secur ing the air gas connection pipe onto the gas valve assembly Separate the gas valve assembly and the venturi from the fan assembly by loosen the two hexago nal head screws The venturi and the gas section can be separated loosing the 2 screw located at the top of the gas valve Replace necessary gaskets before reassemble in reverse order 11 Drain down 2 drain points are located on the boiler 271 A 7 g 1 Air separator 2 Heating circuit drain point 12 Water filter The C H filter is located in the right hydraulic assembly Remove the return pipe as described previously and with draw the filter Reassemble in reverse order 13 Flow switch Dr
18. rd cables from the main PCB Reassemble in reverse order 24 Expansion vessel Remove the casing as step 1 and drain the boiler as step 12 above Unscrew the connecting tails nuts and lift out the boil er from the wall Place it on a side on the floor Remove the expansion vessel bracket retaining screws disconnect the pipe from the vessel and pull it toward you Reassemble in reverse order 25 Pressure gauge Carry out step 1 as above and drain the boiler as step 12 Hinge down electrical box by pressing the retaining tabs P on either sides Press on the clip to remove it and pull it out Remove the clip which hold the connection of the capillary on the pump hose Hang out the pressure gauge with its capillary Reassemble in reverse order esnj ejo1 10 jeuuojsue ON 1 2 eziD1eue Joyesoueb eds ay seoq SOA quiesse sposjoaja uoniuBi 40 10je1euoD 1eds 4 10119 pZ BY seo SOA eiui 40 UB uonoeuuoo y 45 pz epoo 10 eM meds Sui ees nok pines Spuooes 10 YEM SO eui 10113 ze INOHd33 1043
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20. the temperature required for Central Heating system regarding the weather conditions During the setting operation the display will flash When there is a demand for heating either from the room thermostat or the clock the pump starts If the boiler temperature control is calling for heat and the primary flow rate over 4 It min the central heating flow switch operates allowing the ignition sequence to begin The fan on the gas valve assembly starts and when the lighting speed is reached detected by a hall effect sensor the 2 safety solenoids open together to allow gas to the burner The ignition sequence begins and a continuous high speed spark ignites the gas As soon as a flame is detected the orange indicator led 34 will light and the regulation system will be able to adjust the gas rate regarding the heat load If a flame is not detected after 10 seconds the security solenoids close together and shut off the gas The red lockout indicator led 35 will light Press the reset button to re light the burner The central heating flow temperature is controlled by the central heating control thermistor 21 The boiler has been designed to minimise cycling and will not attempt to re light for at least 3 min after the boiler thermostat has been satisfied When the room thermostat is satisfied the burner will switch off and the pump will remain running for a further 3 minutes before it too stops Note It is possible to override the 3 minute delay by
21. ts products content in the siphon which are acid For detail please see section on Parts Removal and Replacement Preliminary checks Remove outer case Check the system pressure is at least 0 7 bar cold Check that the burner is extinguished fully when both solenoids are closed and fan is off Test ionisation functions and check that lockout occurs by turning off gas tap Whilst boiler is operating check operation of the primary flow switch by closing heating flow valve and by pass screw turn clockwise noting the number of turns so that it may be reset correctly Control the correct flood of condensats in the siphon which is transparent REMOVAL AND REPLACEMENT OF PARTS Before removing appliance case isolate the gas and electrical supplies Isolate boiler from the system and drain before removing any component in the water ways Ensure that the appliance is cool 1 Outer Case Remove four screws in base of case and lift free When replacing carefully locate on lugs T on top edge of chassis 2 Sealed chamber front panel Unscrew four self taping screws secur ing the sealed chamber front panel and lift over top corner locating lugs Reassemble in reverse order 3 Combustion Chamber front panel and air gas connection Carry out step 1 and 2 as above Unscrew three screws securing the air gas connection pipe onto the gas valve assembly Disconnect lonisation and lighting ele

1310558d guide Cent. #FF19B.qxp

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