Worcester CDi Combi N.G Service Booklet
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Worcester CDi Combi N.G Service Booklet

Floor mounted and wall hung rsf gas fired condensing boilers
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FLOOR MOUNTED & WALL HUNG RSF GAS FIRED CONDENSING BOILERS
GREENSTAR CDi RANGE
FOR CENTRAL HEATING SYSTEMS AND INDIRECT FED DOMESTIC HOT WATER
Supplied By www.heating spares.co Tel. 0161 620 6677
ENGINEER'S SERVICE BOOKLET
This Service booklet covers the following
boiler ranges:
CDi Combi N.G.
CDi Combi L.P.G.
CDi System N.G.
CDi System L.P.G.
CDi Regular N.G.
CDi Regular L.P.G.
Highflow CDi N.G.
Highflow CDi L.P.G.
FS CDi Regular N.G.
FS CDi Regular L.P.G.
UK/IE

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  • Page 1 FLOOR MOUNTED & WALL HUNG RSF GAS FIRED CONDENSING BOILERS GREENSTAR CDi RANGE FOR CENTRAL HEATING SYSTEMS AND INDIRECT FED DOMESTIC HOT WATER This Service booklet covers the following boiler ranges: CDi Combi N.G. CDi Combi L.P.G. CDi System N.G. CDi System L.P.G. CDi Regular N.G.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS Explanation of symbols and safety precautions Troubleshooting - FW 100 ....58 Explanation of symbols ....3 Troubleshooting using the display .

  • Page 3: Explanation Of Symbols And Safety Precautions

    EXPLANATION OF SYMBOLS AND SAFETY PRECAUTIONS EXPLANATION OF SYMBOLS AND SAFETY PRECAUTIONS EXPLANATION OF SYMBOLS SAFETY PRECAUTIONS WARNING SYMBOLS IF YOU SMELL GAS B Do not smoke or strike matches Safety instructions in this document are B Do not turn electrical switches on or off framed and identified by a warning triangle B Put out naked flames which is printed on a grey background.

  • Page 4: Layout Of Boiler

    LAYOUT OF BOILER LAYOUT OF BOILER CDi COMBI BOILERS Fig. 1 CDi combi layout Flame viewing window Access cover for transformer & PCB Ignition electrode and flame sense electrode DHW out Heat exchanger CH flow Overheat thermostat Trap / syphon outlet connection (22 mm plastic pipe) Access point for cleaning heat exchanger Inlet pressure test point Plate to plate DHW heat exchanger...
  • Page 5 LAYOUT OF BOILER 8 716 115 748 - 01.1Wo Fig. 2 This diagram shows the compact hydraulics and controls with the mantel and fascia panel removed Plate to plate DHW heat exchanger Compact hydraulic mounting screw (2) to boiler Drain point CH temperature control Pump, modulating Mains on/off indicator/diagnostic light (blue)

  • Page 6: Cdi System Boilers

    LAYOUT OF BOILER CDi SYSTEM BOILERS Fig. 3 CDi System layout Flame viewing window Access cover for transformer and PCB Ignition electrode and flame sensing electrode Central Heating flow Heat exchanger Trap /Syphon outlet connector (22mm plastic pipe) Overheat thermostat Inlet pressure test point Access point for cleaning heat exchanger Trap / Syphon...
  • Page 7 LAYOUT OF BOILER 8716115 748-04.1Wo Fig. 4 This diagram shows the compact hydraulics and controls with the mantel and fascia panel removed Compact hydraulic mounting screw (2) to boiler Holiday button Flow unit DHW temperature control Auto air vent Power ON/OFF indicator / diagnostic light (blue) Return connection to boiler heat exchanger Central Heating temperature control Unused port...

  • Page 8: Cdi Regular Boilers

    LAYOUT OF BOILER CDi REGULAR BOILERS 8716115748-05.1Wo Fig. 5 The diagram shows the controls in the service position with the mantle and fascia panel removed 8 716 115 748 (2009/09) Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 9 LAYOUT OF BOILER 8716115748-02.1Wo Fig. 6 Front of the control panel Flame viewing window Ignition electrode and flame sense electrode Heat exchanger Overheat thermostat Access point for cleaning heat exchanger Condensate hose Drain point Trap / syphon outlet connection (22 mm plastic pipe) CH return Gas inlet connection 22 mm compression Cover for external wiring connections...

  • Page 10: Highflow Cdi Combi Boiler

    LAYOUT OF BOILER HIGHFLOW CDi COMBI BOILER 8 7 1 6 11 5 7 4 8 - 0 3 . 1 Wo Fig. 7 Highflow CDi boiler, controls in service position Gas valve Condensate pump assembly Circulating pump Optional filling link Runner wheels on mounting frame CH return isolating valve Mains water inlet isolating valve...

  • Page 11: Fs Cdi Regular Boilers

    LAYOUT OF BOILER FS CDi REGULAR BOILERS 33 34 8716115748-07.1Wo Fig. 9 FS CDi Regular boiler layout Control panel Heatronic III series control board Display Data label Reset button Flue gas sampling point Service function only Combustion air modulating fan Service function only Casing support strut Mains ON/OFF indicator &...

  • Page 12: Operation - Cdi

    OPERATION - CDI OPERATION - CDi INITIALISATION Special When it is switched on, the appliance performs a self- messages Description test which takes about 10 seconds. Key acknowledgement after pressing While the test is in progress, the display shows for the one button (except reset button) first two seconds .

  • Page 13: Operating Elements Cdi (Wall Hung)

    OPERATION - CDI 3.4.2 Set and store values in the service function B Display the value of the service function. B Press the eco button for going upwards or the button for going downwards to select the value. B Press the button for longer than 3 seconds until appears on the display.

  • Page 14: Resetting Service Functions To Factory

    OPERATION - CDI Resetting service functions to factory settings To reset all settings on Service levels 1 and 2 to the factory settings: B Display the value of the service function 8.E (second service level, value = 0) and store it. The appliance re- starts with factory settings (see also section 3.1).

  • Page 15: Operation - Highflow Cdi And Fs Cdi Regular

    OPERATION - HIGHFLOW CDI AND FS CDI REGULAR OPERATION - HIGHFLOW CDi and FS CDi REGULAR INITIALISATION Special When it is switched on, the appliance performs a self- messages Description test which takes about 10 seconds. Key acknowledgement after pressing one button (except reset button) While the test is in progress, the display shows for the first two seconds...

  • Page 16: Operating Elements

    OPERATION - HIGHFLOW CDI AND FS CDI REGULAR 4.4.2 Set and store values in service function B Display the value of the service function. B Press the eco button for going upwards or the button for going downwards to select the value. B Press the button longer than 4 seconds until appears on the display.

  • Page 17: Resetting Service Functions To Factory

    OPERATION - HIGHFLOW CDI AND FS CDI REGULAR 4.5.3 Exit service function/service level without storing B Press the button to exit the service function without storing. After releasing the button goes out. First service level is active. B Press eco button and simultaneously for 3 seconds (the display shows ) in order to go to...

  • Page 18: Boiler Service Functions - Cdi Combi & System Boiler

    BOILER SERVICE FUNCTIONS - CDI COMBI & SYSTEM BOILER BOILER SERVICE FUNCTIONS - CDi COMBI & SYSTEM BOILER FIRST SERVICE LEVEL (PRESSING THE BUTTON FOR APPROX. 10 SECONDS) Range adjustable from - to/ Reset value (after Description Display Description parameter reset) Max.

  • Page 19: Second Service Level

    BOILER SERVICE FUNCTIONS - CDI COMBI & SYSTEM BOILER SECOND SERVICE LEVEL (ENTER AT THE FIRST SERVICE LEVEL AND PRESS THE ECO BUTTON AND SIMULTANEOUSLY FOR 3 SECONDS) Reset Value Range adjustable from - to/ (after parameter Description Display Description reset) Software version CF ** **...
  • Page 20 BOILER SERVICE FUNCTIONS - CDI COMBI & SYSTEM BOILER In order to save as much energy as possible and to minimise the possibility of (bar) water circulation noise, a low characteristic should be chosen. The pump map can be selected within: •...
  • Page 21 BOILER SERVICE FUNCTIONS - CDI COMBI & SYSTEM BOILER 1.E PUMP SWITCH MODE • Maximum mode: the appliance runs constantly at maximum output. The choice of settings is as follows: The display shows 2. The 2-digit display alternates • Control Mode 1 between the CH flow temperature and .
  • Page 22 BOILER SERVICE FUNCTIONS - CDI COMBI & SYSTEM BOILER 4.F SYPHON-FILL PROGRAMME 5.3.2 SECOND SERVICE LEVEL The syphon filling function ensures that the syphon trap 8.A SOFTWARE VERSION is filled when the appliance is first installed or shut down The version number of the software is displayed. for a long period.

  • Page 23: Boiler Service Functions Cdi, Highflow Cdi & Fs Cdi Regular

    BOILER SERVICE FUNCTIONS CDI, HIGHFLOW CDI & FS CDI REGULAR BOILER SERVICE FUNCTIONS CDi, HIGHFLOW CDi & FS CDi REGULAR FIRST SERVICE LEVEL (PRESSING THE BUTTON FOR APPROX. 10 SECONDS) Reset Value Range adjustable from - to/ (after parameter Description Display Description reset)

  • Page 24: Second Service Level

    BOILER SERVICE FUNCTIONS CDI, HIGHFLOW CDI & FS CDI REGULAR SECOND SERVICE LEVEL (ENTER AT THE FIRST SERVICE LEVEL AND PRESS THE ECO BUTTON AND SIMULTANEOUSLY FOR 3 SECONDS) Reset Value Range adjustable from - to/ (after parameter Description Display Description reset) Software version...

  • Page 25: Explanation Of Service Functions

    BOILER SERVICE FUNCTIONS CDI, HIGHFLOW CDI & FS CDI REGULAR EXPLANATION OF SERVICE FUNCTIONS 6.3.1 FIRST SERVICE LEVEL 3.B ANTI-CYCLE TIME The anti-cycle time is factory set to 3 minutes. 1.A MAX. OUTPUT (HEATING) The shortest possible anti-cycle time is 1 minute The heating output can be set to any level between (recommended for single-pipe and hot-air heating minimum rated heat output and maximum rated heat...
  • Page 26 BOILER SERVICE FUNCTIONS CDI, HIGHFLOW CDI & FS CDI REGULAR The next time the heating or hot water system calls for 8.F PERMANENT IGNITION heat, the appliance is held at minimum output for This function allows permanent ignition without gas 15 minutes.

  • Page 27: Rectifying Faults

    RECTIFYING FAULTS RECTIFYING FAULTS INDICATION OF FAULTS 7.2.2 Faults that are not displayed Faults are indicated simultaneously by a letter code in Appliance faults the display and by flashing of the fault indicator LED. This helps to identify and eliminate the cause of the fault Excessive burner noise, rumbling quickly and reliably.

  • Page 28: Notes On Using The Fault Code Tables

    RECTIFYING FAULTS NOTES ON USING THE FAULT CODE TABLES The procedure is best described with the aid of an example: In this example: check the flue is clear by testing the level. • Work through the table from top to bottom and from •...

  • Page 29: Error Codes On The Display

    RECTIFYING FAULTS ERROR CODES ON THE DISPLAY and fault indicator LED are flashing Controlled characteristic pump has run dry Check Action System pressure below 1.2 bar yes: B Power OFF the appliance B Check appliance and system for water leaks and repair as necessary.
  • Page 30 RECTIFYING FAULTS and fault indicator LED are flashing. Appliance still available for heating demands. Tank (Heat Bank) NTC sensor defective. Check Action Is the tank NTC sensor connection yes: Change relevant parts corroded, damaged or dirty? A5? go to 2 go to 2 B Power OFF the appliance.
  • Page 31 RECTIFYING FAULTS and fault indicator LED are flashing. Appliance NOT available for demands. External under floor heating thermostat defective. Check Action B Power OFF the appliance. yes: go to 2 B Disconnect the appliance electrical B Ensure that the link is securely connected to ST8/8-9 connection.
  • Page 32 RECTIFYING FAULTS and fault indicator LED are flashing. (Boiler still produces hot water but at a lesser degree of accuracy over the temperature.) Water NTC sensor defective. Check Action B Check if the water NTC connector yes: B Change relative parts. corroded, damaged or dirty.
  • Page 33 RECTIFYING FAULTS and fault indicator LED are flashing. Bus communication to the programmer interrupted (set value not received) Check Action B Switch off the appliance. yes: A8? go to 2 B Disconnect the appliance power. B Wire up or correct bus cable. B Remove the upper section of the B Reconnect appliance power.
  • Page 34 RECTIFYING FAULTS and fault indicator LED are flashing. Bus communication to the programmer interrupted (set value not received) Check Action Has the bus module been replaced yes: A8? go to 6 B Switch off appliance B Disconnect electrical power B Replace bus module B Reconnect appliance power B Switch on appliance A8? go to 5...
  • Page 35 RECTIFYING FAULTS and fault indicator LED are flashing Code plug not detected. Check Action B Select in the second service level yes: go to 2 the service function 8.b (Code go to 3 plug). B Compare number displayed with that shown in Appendix (only digits no.
  • Page 36 RECTIFYING FAULTS and fault indicator LED are flashing. Fan speed too low Check Action Fan cable connector correctly yes: go to 2 connected on fan? B Switch OFF the appliance. B Reconnect connector. B Switch ON the appliance. C6? go to 2 Check power supply to appliance, yes: go to 3...
  • Page 37 RECTIFYING FAULTS and fault indicator LED are flashing. Outside temperature sensor fault (open or short circuit) Check Action B Power OFF the appliance. go to 2 B Disconnect the boiler mains B Connect the outside temperature sensors correctly connection. to A and F on the PCB. Are the outside temperature sen- B Reconnect the boiler electrical mains sors connected to A and F on the...
  • Page 38 RECTIFYING FAULTS and fault indicator LED are flashing. (Boiler not available for demands) Condensate float switch in condensate pump defective Check Action B Power OFF the appliance. go to 2 B Disconnect the boiler mains B Ensure that ST19 is plugged onto the PCB and the connection.
  • Page 39 RECTIFYING FAULTS and fault indicator LED are flashing. (Boiler not available for demands) Tank overheat thermostat defective Check Action B Power OFF the appliance. go to 2 B Disconnect the boiler mains B Ensure that ST9 is plugged onto the PCB. connection.
  • Page 40 RECTIFYING FAULTS and fault indicator LED are flashing. Flow temperature NTC sensor defective. Check Action B Check if the flow temperature yes: B Change relative parts. NTC sensor connector is E2? go to 2 corroded, damaged or dirty. go to 2 B Switch OFF the appliance.

  • Page 41: B Top Up System

    RECTIFYING FAULTS and button reset and fault indicator LED are flashing. Safety temperature circuit has tripped. Check Action Type of CH system: go to 3 yes: Is the appliance installed in a fully go to 2 pumped sealed system? Open vented CH system: go to 4 yes: Is there enough water in the feed...

  • Page 42: E9? Go To 5

    RECTIFYING FAULTS and button reset and fault indicator LED are flashing. Safety temperature circuit has tripped. Check Action B Switch OFF the appliance. yes: Connect flue gas safety temperature limiter lead. go to 5 B Un-plug the connector from the flue safety temperature limiter.

  • Page 43: B Disconnect The Boiler Power Connection

    RECTIFYING FAULTS and button reset and fault indicator LED are flashing. Safety temperature circuit has tripped. Check Action The PCB is damaged. B Make a note of the altered service settings. B Switch OFF the appliance. B Disconnect the boiler power connection. B Change PCB control board.

  • Page 44: B Press The Reset Button For 3 Seconds And Release It

    RECTIFYING FAULTS and RESET button and fault indicator LED are flashing. During operation: flame not detected. Check Action go to 5 Is a burner flame visible? yes: go to 2 go to 3 Is the gas cock turned on? yes: B Open the gas valve.

  • Page 45: B Switch On The Appliance

    RECTIFYING FAULTS and RESET button and fault indicator LED are flashing. During operation: flame not detected. Check Action B Switch OFF the appliance. B Reconnect the appliance power connection. yes: B Disconnect the boiler power B Switch ON the appliance. connection.
  • Page 46 RECTIFYING FAULTS and RESET button and fault indicator LED are flashing. During operation: flame not detected. Check Action B Check flue installation for agreement with the Problem with flue? yes: instruction manual. B Check CO level in combustion air in the flue (with outer casing Then: fitted).
  • Page 47 RECTIFYING FAULTS and RESET button and fault indicator LED are flashing. During operation: flame not detected. Check Action Electrode assembly defective? yes: B Replace electrode assembly. B Switch OFF the appliance. B Switch ON the appliance. B Remove electrode assembly. B Press the reset button for 3 seconds and release it.
  • Page 48 RECTIFYING FAULTS and fault indicator LED (and possibly RESET button) are flashing. Internal failure Check Action Button reset flashing? yes: B Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. B Initiate demand for heat by pressing button for 10 seconds and then press again after 30 seconds to cancel.
  • Page 49 RECTIFYING FAULTS and RESET button and fault indicator LED are flashing. Although appliance switches off, flame still detected Check Action Electrode(s) dirty or defective? yes: B Replace electrode assembly. B Switch ON the appliance. B Switch OFF the appliance. B Press the reset button for 3 seconds and release it. B Remove electrode assembly and After releasing the appliance re-starts.
  • Page 50 RECTIFYING FAULTS and RESET button and fault indicator LED are flashing. After appliance switches off flame is detected Check Action Is the condensate trap blocked? yes: B Switch OFF the appliance. B Clean out condensate trap discharge pipe. B Switch ON the appliance. B Press the reset button for 3 seconds and release it.
  • Page 51 RECTIFYING FAULTS and RESET button and fault indicator LED are flashing. After appliance switches off flame is detected Check Action The PCB is damaged. B Make a note of the altered service settings. B Switch OFF the appliance. B Disconnect the boiler power connection. B Change PCB control board.

  • Page 52: Faults That Are Not Displayed

    RECTIFYING FAULTS FAULTS THAT ARE NOT DISPLAYED 7.5.1 APPLIANCE FAULTS Excessive burner noise, rumbling noises Check Action Does the gas supply type match the yes: go to 2 specifications on the appliance type B Convert appliance to correct gas type. plate? Rumbling noises? go to 2 B Test gas supply pressure - OK?
  • Page 53 RECTIFYING FAULTS Heating up of last radiators in system too slow Check Action Pump map/pump step incorrect? Wall hung combi and system appliances: B Set appropriate pump map/pump step (service function 1.C/1.d). Conventional appliances: B Set appropriate pump velocity on pump. Flue gas levels incorrect, CO level too high Check Action...
  • Page 54 RECTIFYING FAULTS Ignition too harsh, ignition poor Check Action yes: B Select the value 0 and store. B Select in the second service level the service function 8.F (Permanent igni- B Exit the service function. tion). go to 6 B Select the value 1 and store. Check the permanent ignition at B Select the value 0 and store.
  • Page 55 RECTIFYING FAULTS Ignition too harsh, ignition poor Check Action B Test gas supply pressure - OK? yes: go to 8 Does pressure match figure B De-commission appliance. specified in installation In case of natural gas: instructions? B Notify gas utility. Problem with flue? yes: There is flue gas in the combustion air.
  • Page 56 RECTIFYING FAULTS Inadequate hot water outlet temperature (combi boiler) Check Action Does pump run? yes: B Try to start pump. B If not successful, change pump. B Ensure the pump is not in ECO mode (default after power ON go to 2 and after reset).
  • Page 57 RECTIFYING FAULTS Set room temperature not reached (DT10/DT20) Check Action Air in the heating system. B Switch OFF the appliance. B Check appliance and system for water leaks and repair as necessary. B Top up system. B Switch ON the appliance. B Select in the first service level the service function 2.C (Air purge mode).

  • Page 58: Troubleshooting - Fw 100

    TROUBLESHOOTING - FW 100 TROUBLESHOOTING - FW 100 BUS device faults are indicated. If the controller shows Fault 12, the cylinder temperature is so high that the cylinder High Limit Thermal Cut-out has tripped. B Reset the High Limit Thermal Cut-out. TROUBLESHOOTING USING THE DISPLAY The current fault is displayed on the controller: B Identify the BUS device affected by the current fault.
  • Page 59 TROUBLESHOOTING - FW 100 Information displayed ( Pos. 1, 3 and 4 in fig.16) Text Code Cause Remedy Fault 11 New ISM detected. Power up all ISMs simultaneously and System configuration: new BUS start automatic system configuration. device New ISM detected. Power up all ISMs simultaneously and start automatic system configuration.
  • Page 60 TROUBLESHOOTING - FW 100 Information displayed ( Pos. 1, 3 and 4 in fig.16) Text Code Cause Remedy Fault 50 Solar pump (SP) sticking due to Unscrew and remove the slotted screw Solar pump jammed or air in physical blockage. on the pump head and use a system screwdriver to release the pump shaft.
  • Page 61 TROUBLESHOOTING - FW 100 Information displayed ( Pos. 1, 3 and 4 in fig.16) Text Code Cause Remedy Fault 59 Mass flow rate in solar system for Set mass flow in solar system correctly Mass flow rate in solar system collector group 1 is too high.

  • Page 62: Troubleshooting Without The Display

    TROUBLESHOOTING - FW 100 TROUBLESHOOTING WITHOUT THE DISPLAY Fault Cause Remedy Required room Thermostatic valve(s) set too low. Set thermostatic valve(s) higher. temperature not Minimum outside temperature setting too Adjust minimum outside temperature setting. achieved. low. Heating curve set too low. “Heating levels”...

  • Page 63: Troubleshooting - Fr110

    TROUBLESHOOTING - FR110 TROUBLESHOOTING - FR110 BUS device faults are indicated. If the controller shows Fault 12, the cylinder temperature is so high that the cylinder High Limit Thermal Cut-out has tripped. B Reset the High Limit Thermal Cut-out. TROUBLESHOOTING USING THE DISPLAY The current fault is indicated on the controller: B Identify the BUS device affected by the current fault.
  • Page 64 TROUBLESHOOTING - FR110 Information displayed items 1, 3 and 4 in Fig. Text Code Cause Remedy Fault 11 New ISM detected. Power up all ISMs System configuration: new BUS device simultaneously and start New ISM detected. Power up all ISMs automatic system configuration.
  • Page 65 TROUBLESHOOTING - FR110 Information displayed items 1, 3 and 4 in Fig. Text Code Cause Remedy Fault 50 Solar pump (SP) sticking due to Unscrew and remove the slotted Solar pump jammed or air in system physical blockage. screw on the pump head and use a screwdriver to release the pump shaft.
  • Page 66 TROUBLESHOOTING - FR110 Information displayed items 1, 3 and 4 in Fig. Text Code Cause Remedy Fault 59 Mass flow rate in solar system for Set mass flow in solar system Mass flow rate in solar system too high/ collector group 1 is too high. correctly (e.g.

  • Page 67: Troubleshooting Without The Display

    TROUBLESHOOTING - FR110 TROUBLESHOOTING WITHOUT THE DISPLAY Fault Cause Remedy Required room Thermostatic valve(s) set too low. Set thermostatic valve(s) higher. Flow temperature controller on the boiler set Set the flow temperature controller higher. temperature not Reduce influence of solar optimisation if too low.

  • Page 68: Troubleshooting - Rt10

    TROUBLESHOOTING - RT10 TROUBLESHOOTING - RT10 In the event of a fault in the heating appliance, the Complaint Cause Remedy display will show e.g. Required Thermostatic Open the thermostatic A7 E. temperature valve(s) in the valve(s). In the event of a fault in the FW 100, the display will not reached room set to low show e.g.

  • Page 69: Troubleshooting - Td 200

    TROUBLESHOOTING - TD 200 TROUBLESHOOTING - TD 200 Faults in the devices using the bus are displayed. A fault in the heating appliance is shown in the display with corresponding help texts. Display Cause Remedy TD 200 defect Temperature sensor in the TD 200 Emergency mode: defective The heating automatically goes into On / Off...
  • Page 70 TROUBLESHOOTING - TD 200 Complaint Cause Remedy Required temperature Thermostat valve(s) in the control room set Fully open the thermostat valve(s) not reached to low or replace them with manual valve(s). Flow temperature controller on the heating Set flow temperature controller higher. appliance set too low Air lock in the heating system Vent radiator and heating system.

  • Page 71: Appendix

    APPENDIX APPENDIX 12.1 NTC SENSOR VALUES, CDi APPLIANCES 12.1.1 CH flow NTC sensor and 12.2 CDi fan speeds hot water NTC sensor Appliance Fan speed ranges (Hz) Temperature ( °C) Measurement tolerance ± 10% Resistance ( Ω) 27CDi N.G. 29 - 78 14 772 30CDi N.G.

  • Page 72: 12.4 Ntc Sensor Characteristics Highflow Cdi & Fs Cdi Regular Appliances

    APPENDIX 12.4 NTC SENSOR CHARACTERISTICS HIGHFLOW CDi & FS CDi REGULAR APPLIANCES 12.4.3 OUTDOOR NTC SENSOR CHARACTERISTIC Description Characteristic TABLE Primary NTC Siemens NTC RESISTANCE ( Ω) TEMPERATURE ( °C) Domestic hot water NTC Elmwood NTC >= 4111 Internal heat bank NTC Elmwood NTC 3669 Outdoor NTC...

  • Page 73: 12.5 Electrical Wiring Diagrams

    APPENDIX 12.5 ELECTRICAL WIRING DIAGRAMS 12.5.1 CDi COMBI APPLIANCES FLAME SENSE SPARK ELECTRODE ELECTRODES Orange or Green Orange FLOW NTC HEAT EXCHANGER OVERHEAT STAT FLUE OVERHEAT STAT SAFETY Black SOLENOID Black Orange FLOW DIVERTER TURBINE VALVE SAFETY Black SOLENOID PUMP Orange PUMP Blue...
  • Page 74 APPENDIX 12.5.2 CDi SYSTEM APPLIANCES FLAME SENSE SPARK ELECTRODE ELECTRODES Orange Orange FLOW NTC HEAT EXCHANGER OVERHEAT STAT FLUE OVERHEAT STAT SAFETY Black SOLENOID Black DIVERTER VALVE SAFETY (Optional) SOLENOID PUMP Orange PUMP Blue Yellow CONTROL Green Black White Black Purple MAINS SUPPLY...
  • Page 75 APPENDIX 12.5.3 CDi REGULAR APPLIANCES FLAME SENSE SPARK ELECTRODE ELECTRODES Orange Orange FLOW NTC HEAT EXCHANGER OVERHEAT STAT FLUE OVERHEAT STAT SAFETY Black SOLENOID Black SAFETY SOLENOID MAINS SUPPLY Earth PUMP SUPPLY WIRING CENTRE Colour sequence CH TEM- PERATURE CONTROL Ls Ns ST10 Fuse, slow...
  • Page 76 APPENDIX 12.5.4 HIGHFLOW CDi APPLIANCES FLAME SENSE SPARK ELECTRODE ELECTRODES Orange or Green PRIMARY FLOW NTC PRIMARY OVERHEAT SENSOR FLUE OVERHEAT Orange SAFETY Violet SOLENOID Blue TANK OVERHEAT 230 V FLOW INTER- TURBINE SAFETY FACE SOLENOID PUMP DIVERTER VALVE 230V TWIN PROGRAMMER MAINS HIGH LEVEL...
  • Page 77 APPENDIX 12.5.5 FS CDi APPLIANCES FLAME SENSE SPARK ELECTRODE ELECTRODES Orange or Green PRIMARY FLOW NTC PRIMARY OVERHEAT FLUE OVERHEAT Orange SAFETY Violet SOLENOID Blue SAFETY SOLENOID EXTERNAL PUMP PUMP CONTROL MAINS HIGH LEVEL SUPPL Y SENSOR Earth EXTERNAL PUMP CONDENSATE WIRING CENTRE SUPPL Y...

  • Page 78: Code Plugs Used With Cdi Appliances

    APPENDIX 12.6 CODE PLUGS USED WITH CDi 12.7 CODE PLUGS USED WITH HIGHFLOW APPLIANCES CDi & FS CDi REGULAR APPLIANCES Component Order no. Remarks Component Order no. Remarks Code plug Code plug 27CDi N.G. 8 714 431 020 0 - Highflow 440CDi 8 714 431 700 0 - N.G.

  • Page 79: Approved Corrosion Inhibitors And Anti-Freeze For Central Heating Water

    APPENDIX 12.8 APPROVED CORROSION INHIBITORS 12.9 POSSIBLE SOURCES OF CORROSIVE AND ANTI-FREEZE FOR CENTRAL CFCS HEATING WATER The presence of halogenated hydrocarbons in the combustion air causes surface corrosion on affected CORROSION INHIBITOR metals. Particularly susceptible is the combustion B Add a suitable* inhibitor (or combined inhibitor/anti- chamber and the heat exchanger surfaces (including freeze if the system is exposed to freezing conditions) stainless steel) as well as the metal components in the...
  • Page 80 Dedicated to heating comfort Worcester, Bosch Group Cotswold Way, Warndon, Worcester WR4 9SW Tel. 01905 754624 Fax. 01905 754619 Worcester, Bosch Group is a brand name of Bosch Thermotechnology Ltd. www.worcester-bosch.co.uk 8 716 115 748 Supplied By www.heating spares.co Tel. 0161 620 6677...

This manual is also suitable for:

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