Evo HE C22/24 Installation & Servicing Instructions Manual Download

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SERVICING

evo HE C -

Installation and Servicing

spfu

9797

57 REPLACEMENT OF COMPONENTS

GENERAL

When replacing ANY component

Isolate the electricity supply.

Turn off the gas supply.

Remove the boiler front panel. Refer to Frame 49.

After replacing ANY component check operation of the boiler,
including gas tightness, gas rate and combustion test.

Refer to Frame 57.

Remove the boiler front and sealing panels. Refer to
Frames 49 & 50.

Drain down the boiler. Refer to Frame 77.

Unplug the electrical lead.

Unscrew the thermistor.

Fit the new thermistor using the sealing washer
provided.

Reassemble in the reverse order.

Check the operation of the boiler. Refer to Frames 45
& 46.

58 DRY FIRE THERMISTOR REPLACEMENT

59 FAN REPLACEMENT

Refer to Frame 57.

Remove the boiler front and sealing panels. Refer to Frames
49 & 50.

Disconnect the electrical leads from the fan.

Undo the gas pipe union connection to the injector housing.

Remove the screw retaining the fan mounting bracket.

Remove the fan and venturi assembly. Refer to Frame 52.

Unscrew the 3 screws and remove the venturi assembly,

noting the orientation of the venturi in relation to the fan body.

Transfer the venturi assembly to the new fan, replacing the
gasket if evidence of damage or deterioration is visible.

Fit the new fan / venturi assembly.

10.

Reassemble the boiler in reverse order, taking care not to
overtighten the screw on the fan mounting bracket.

11.

Check the operation of the boiler. Refer to Frames 45 & 46.

IMPORTANT.

When work is complete, the sealing panel, if removed, must
be correctly refitted - ensuring that a good seal is made.

Notes.

In order to assist fault finding, the control panel has an
LED diagnostic display.

The key to boiler fault conditions

is shown in Frame 84

In order to replace components in Frames 74-82 it is
necessary to drain the boiler. Refer to Frame 77.

THE BOILER MUST NOT BE OPERATED WITHOUT THE SEALING PANEL FITTED

SER

VICING

Summary of Contents for C22/24

Page 1: ...fficiency Boilers Installation Servicing Instructions See reverse for evo HE Users Guide Manufactured exclusively for Wolseley Centers Ltd by Ideal Boilers For details of document amendments refer to page 3 September 2009 UIN 204427 A02 Packaged Boiler Contents have been checked by Operator Number ...

Page 2: ...2 evo HE C Installation and Servicing ...

Page 3: ...ue kit added Page 19 Frame 16 Terminal Wall Seal Assembly Position New frame added ref positioning of terminal wall seal Page 22 Frame 23 Condensate Pipe Termination Configurations Update drawing 1 and not added ref BS6798 2002 Page 49 Frame 68 Combustion Chamber Insulation Replacement Updated Frame to reflect new insulation Page 54 Frame 78 Diverter Valve Internal Parts Replacement New item no 6 ...

Page 4: ...rating pressure of water C13 C33 C53 A room sealed appliance designed for connection via ducts to a horizontal or vertical terminal which admits fresh air to the burner and discharges the products of combustion to the outside through orifices which in this case are concentric The fan is up stream of the combustion chamber I2H An appliance designed for use on 2nd Family gas Group H only The value i...

Page 5: ...r all boilers Flushing to BS 7593 12 Inhibitor 12 Central heating mode Heat input to be calculated For assistance see Technical Helpline on the back page Page Burner operating pressure n a Central heating flow temp measure and record Central heating return temp measure and record For combination boilers only Scale reducer n a Hot water mode Heat input to be calculated Max operating burner pressure...

Page 6: ...r CH the heating system is supplied at the selected temperature of between 30 o C and 82o C until DHW is drawn off The full output from the boiler is then directed via the diverter valve to the plate heat exchanger to supply a nominal DHW draw off of C22 24 9 6 l min at 35 o C temperature rise C22 30 12 l min at 35 o C temperature rise C22 35 14 4 l min at 35 o C temperature rise The DHW draw off ...

Page 7: ...ertical wall capable of adequately supporting the weight of the boiler and any ancillary equipment The boiler may be fitted on a combustible wall and insulation between the wall and the boiler is not necessary unless required by the local authority For electrical safety reasons there must be no access available from the back of the boiler The boiler must not be fitted outside Timber Framed Buildin...

Page 8: ...re available from boiler suppliers Ask for TFC flue guard model no K6 round plastic coated In case of difficulty contact Grasslin UK Ltd Tel 44 0 01732 359 888 Tower House Vale Rise Fax 44 0 01732 354 445 Tonbridge Kent TN9 1TB www tfc group co uk Ensure that the guard is fitted centrally 5 The flue assembly shall be so placed or shielded as to prevent ignition or damage to any part of any buildin...

Page 9: ... so the plastic fascia should be removed See Frame 44 Bottom clearance Bottom clearance after installation can be reduced to 5mm However 100mm must be available for servicing the space into which the boiler is going to be installed is less than the length of flue required the flue must be fitted from the outside Installation from inside ONLY b If a core boring tool is to be used inside the buildin...

Page 10: ... thermostatic radiator valves are used the space heating temperature control over a living dining area or hallway having a heating requirement of at least 10 of the boiler heat output should be achieved using a room thermostat whilst other rooms are individually controlled by thermostatic radiator valves However if the system employs thermostatic radiator valves on all radiators or two port valves...

Page 11: ...ler is fitted with an approved anti vacuum or syphon non return valve b Hot and cold water supplies to the shower are of equal pressure CH Return Ecl 6053 Hose unions Mains water supply Temporary hose disconnect after filling Additional stop valve Double check valve assembly note direction of flow The boiler does not normally need a bypass but at least some radiators on the heating circuit of load...

Page 12: ...eley Centres Ltd recommend the use of Fernox Qantomat GE Betz Sentinel Combiguard and Calmag CalPhos I scale reducing devices which must be used in accordance with the manufacturers instructions 19 Gas control valve 20 Fan bracket 21 Orifice plate 23 Control thermistor flow return 24 Overheat thermostat 25 Ignition electrode 26 Flame detection electrode 32 Kit Trap and seal 35 User control 36 Prim...

Page 13: ... C Installation and Servicing 8 BOILER ASSEMBLY Exploded View 62 44 5 4 10 25 17 103 8 11 26 12 13 3 23 32 19 36 39 35 24 71 98 69 74 57 60 18 60 68 67 66 6 51 64 57 75 59 61 40 94 53 14 15 21 16 20 2 1 evfu9803 INSTALLATION ...

Page 14: ...tents Pack A Contents A Boiler B Hardware Pack Box C Wall Mounting Plate D These Installation Users Instructions E Wall Mounting Template located on internal protective packaging F 1 Year Guarantee Pack B Contents A Telescopic flue terminal B Flue turret C Rubber Terminal Wall Seal D Screw E Sealing tape Hardware Pack Contents A Support Bracket 1 off B Accessory Pack C CH Flow Valve Gauge Pack D D...

Page 15: ...ve the instructions and read thoroughly before unpacking the product 5 When ready for installation lift off the cardboard carton 10 PACKAGING REMOVAL 11 BOTTOM AND FRONT PANEL REMOVAL 1 Remove the screw from the underside of the boiler s bottom panel 2 Pull the right hand side of the panel down slide it to the right and withdraw 3 Remove the screws from bottom of the front panel 4 Lift panel up an...

Page 16: ...L MAX FLUE LENGTH For alternative details refer to Powered Vertical Instructions 90O ELBOW KIT 60 100 EQUIVALENT FLUE LENGTH RESISTANCE 1M 45O ELBOW KIT 60 100 EQUIVALENT FLUE LENGTH RESISTANCE 0 6M MINIMUM HORIZONTAL FLUE LENGTHS TELESCOPIC TERMINAL 370MM Centre Line of turret to outside of wall terminal ONE PIECE TERMINAL 285MM Wall Thickness X 160 mm 160 S 193mm nm8943 FLUEKITS Pack B supplied ...

Page 17: ...he wall to suit this condition 5 Only use water as a lubricant during assembly Do not use mineral based oils Total Flue length dimension Flue measuring from CL of turret to outside wall Rear flue Side flue Extra packs Boiler dim X 160 dim L 195 required Size Up to 595 mm Up to 595 mm none C22 24 30 35 Up to 1545 mm Up to 1545 mm Pack D 1 off C22 24 30 35 Up to 2495 mm Up to 2495 mm Pack D 2 off C2...

Page 18: ...le see diagram below Note Mark the centre of the hole as well as the circumference 4 Remove the template from the wall 14 WALL MOUNTING TEMPLATE nm9279 V See Diagram Below Extended centre line 155 nm8772 C22 35 C22 24 C22 30 15 PREPARING THE WALL IMPORTANT Ensure that during the cutting operation masonry falling outside of the building does not cause damage or personal injury 1 Cut the flue hole p...

Page 19: ... Refer to Frame 12 2 Measure distance from side of boiler to inside of wall and add to wall thickness X L Refer to Frame 12 3 Add 115mm to dimension L and set telescopic flue length as indicated in drawing 4 Using a 3 5mm drill bit drill one hole in outer air duct taking care not to pierce plastic inner flue 5 Fix to length using self tappers provided 6 Seal outer air duct using the tape provided ...

Page 20: ...n duct clamp 1 0m 39 long No 10 x2 wood screw 4 off nm8732 nm8762 Boiler Standard flue Terminal grille Flue length Extension flue Use a maximum of 6m extended flue ONLY C22 24 30 Use a maximum of 3m extended flue ONLY C22 35 Because of the flexibility of the telescopic flue terminal it is not always necessary to cut an extension pack 1 Measure the total flue length from the centre of the boiler ou...

Page 21: ...ocate the support bracket on the mounting plate TO FIT THE WALLMOUNTING PLATE USINGTHESTAND OFF FRAME OPTION KIT To allow pipework to be taken upwards Put the screws into the wall plugs and leave 10mm proud Hang the stand off frame onto the screws and tighten up Fasten the wall mounting plate to the stand off frame with the 6mm screws provided Locate the support bracket on the mounting plate Note ...

Page 22: ...ed to prevent possible freezing All pipework and fittings in the condensate drain system must be made of plastic No other materials may be used The drain outlet on the boiler is standard 21 5mm overflow pipe This size must not be reduced in any part of its length If external condensate pipe run is greater than 3m then pipe must be 32mm nominal diameter Consideration must be given to insulating ext...

Page 23: ... wall Ground Level Open end of pipe direct into gulley below grating but above water level DRAIN cla7775 4 TERMINATION TO SOAKAWAY 5 TERMINATION TO DRAIN GULLEY Termination into a down pipe can take place providing it can be confirmed that the down pipe is part of a combined waste and rain water system BOILER External wall Ground Level Termination to Soak away cla7774 minimum 500mm cla9253 BOILER ...

Page 24: ...through and pull back to seal against outside wall face 3 Locate the flue turret on the top of the boiler ensuring that the turret gasket is in place Also ensure the turret is located concentric with the flue aperture on the boiler top panel Check that the flue seal A located in the top of the flue manifold is secure and giving an effective seal 4 Secure the flue turret on top of the boiler by ins...

Page 25: ...l must be made This is achieved by using either Flat roof weather collar or Universal weather collar ACCESSORIES Flue Duct Extension Kits are available for flue lengths extending beyond 1m These packs contain 1m extension ducts and may be cut to the desired length If the offset vertical option is used an elbow Kit is required For a full accessories list refer to page 7 Optional Extras and Frame 31...

Page 26: ...ioned so that products of combustion can safely disperse at all times Pluming may occur at the termination so where possible terminal positions where this could cause a nuisance should be avoided Minimum dimensions are shown below Terminal Position Minimum Dimension Directly below an opening air brick windows etc 300 mm Below plastic painted gutters 300 mm Painted surface 300 mm Below eaves or bal...

Page 27: ...27 INSTALLATION evo HE C Installation and Servicing FLUE OUTLET rf8737 rf8738 30 FLUE ARRANGEMENT Note The equivalent flue length resistance of the elbow kits are 90o elbow kit 1m 45o elbow kit 0 6m ...

Page 28: ...collar Flat roof tile weather collar 1 nm8741 2 Extension Duct Vertical connector Turret clamp 3 nm8743 X 4 2 Fit the vertical connector supplied seperately in accordance with the in the instructions provided with the vertical connector kit ENSURE THE GASKETS IN THE BOILER FLUE OUTLET ARE CORRECTLY FITTED 3 Push fit extension duct if required supplied separately into vertical connector 4 If the la...

Page 29: ...he hardware pack to the threaded boss connections provided at the lower rear of the boiler Ensure all boss blanking plugs are removed before connecting hardware Each valve must be fitted to the correct boss as shown in the picture Guidance to correct connection location is also provided on the wall mounting template Ensure each union is fitted with fibre seals provided 2 If connecting the boiler t...

Page 30: ... union Ensure that the gas supply pipe does not foul the boiler casing For additional gas supply information refer to Gas Supply on page 8 34 GAS CONNECTION The safety valve connection located at the bottom right hand side of the boiler comprises a 15mm diameter stub pipe The discharge pipe should be positioned so that the discharge of water or steam cannot create a hazard to the occupants of the ...

Page 31: ... should be protected Central Heating 1 Remove the front panel Refer to Frame 49 2 Ensure that the CH isolating valves are open 3 Fill and vent the system Check for water tightness 4 Pressurise the system to 1 bar Domestic Hot Water 1 Fully open all DHW taps and ensure that water flows freely from them 2 Close all taps Note The domestic hot water flow rate is automatically regulated to a maximum C2...

Page 32: ...71 Wiring Regulations and any local regulations 38 INTERNAL WIRING A pictorial wiring diagram is shown in Frame 40 This photo shows an external programmer lead on the left and the mains cable on the right 1 Route the mains cable from bottom left hand rear of boiler casing to plug socket connection 2 Wire the permanent live supply into the 5 way remote plug terminals L3 N IMPORTANT A permanent live...

Page 33: ... case the programmer selector switches are set to OFF and all the other controls MUST be left in the running position The frost thermostat should be sited in a cold place but where it can sense heat from the system Note If the boiler is installed in a garage it may be necessary to fit a pipe thermostat preferably on the return pipework Wiring should be as shown with minimal disturbance to other wi...

Page 34: ...g nm9323 Dry fire thermistor Diverter Valve Permanent black link br br pk y g b bk gy r v 1 2 3 y g y g 40 PICTORIAL WIRING DIAGRAM LEGEND b blue bk black br brown gy grey or orange pk pink r red v violet w white y yellow y g yellow green INSTALLATION ...

Page 35: ...carry out the preliminary electrical system checks i e earth continuity polarity resistance to earth and short circuit using a suitable test meter B Gas Installation 1 The whole of the gas installation including the meter should be inspected and tested for tightness and purged in accordance with the recommendations of BS 6891 In IE refer to IS 813 2002 2 Purge air from the gas installation by the ...

Page 36: ...s established the WHITE Burner On neon D will be illuminated the LED display will show status LEGEND A Boiler On Off switch B CH thermostat knob D Burner On neon E Reset button F Injector pressure test point G Inlet pressure test point H Gas service cock J Casing pressure test point K Overheat thermostat M Control thermistor flow N Automatic air vent R Pressure gauge S CH Flow isolating valve T CH...

Page 37: ...ger temperature b The DHW preheat operates 24 hours a day 2 Fully open all DHW taps in turn and ensure that water flows freely from them The display should read neon flashing then neon steady when the burner lights Make the following checks for correct operation in 3 Close all taps except the furthest one from the boiler and check that the boiler is firing at maximum rate This is factory set to gi...

Page 38: ...s discharging correctly 8 Finally set the controls to the User s requirements Note The pump will operate briefly as a self check once every 24 hours in the absence of any system demand WATER TEMPERATURES Temperatures can be selected using the CH and DHW thermostats Knob Setting CH Flow DHW Outlet Temp Temp o C o F o C o F Max 82 180 65 150 Min 30 86 42 110 5 Set the central heating external contro...

Page 39: ...ich are outlined in the householder pack supplied with this boiler 1 Hand the User Instructions to the householder and explain his her responsibilities under the relevant national regulations 2 Explain and demonstrate the lighting and shutting down procedures 3 The operation of the boiler and the use and adjustment of all system controls should be fully explained to the householder to ensure the g...

Page 40: ...top of the boiler refer to Frame 49 or into the flue terminal if access is possible optional test For correct boiler operation the CO CO2 content of the flue gas should not be greater than 0 004 ratio 14 Complete the service section in the Benchmark Commissioning Checklist To ensure the continued safe and efficient operation of the appliance it is recommended that it is checked at regular interval...

Page 41: ...e 2 screws from the underside of the boiler 2 Pull the panel forward at the bottom and lift to disengage it from the top lugs 1 To remove the sealing panel remove the 4 screws 2 Remove the panel 3 To remove the bottom panel first remove the screw 4 Pull the right hand side of the panel down Slide it to the right and withdraw SERVICING ...

Page 42: ...ONTROL BOX TO THE SERVICING POSITION 1 Remove the 2 screws and withdraw the user control 2 Unplug the low voltage electrical lead from the back of the user control 3 Release the clamp 4 Swing the control box down 5 Pull the control box slightly forward SERVICING ...

Page 43: ... as this may cause damage to the ceramic 3 Brush off any deposits that may be on the ceramic with a SOFT brush 4 Inspect the sealing gasket around the burner and combustion chamber insulation for any signs of damage Replace as necessary Note Take care not to disturb the ionisation probes at the front and rear of the combustion chamber 1 Disconnect the electrical leads from the fan 2 Undo the gas p...

Page 44: ...nsure that they are clean and in good condition replace if necessary 6 Check the condition of the combustion chamber insulation Any cracked or damaged pieces must be replaced Note Take care not to disturb the ionisation probes at the front and rear of the combustion chamber 7 Check that the ignition and detection gaps are correct Refer to Frames 63 64 7 Refit the boiler sealing panel IMPORTANT Ens...

Page 45: ...e fan 4 Undo the gas pipe union connection to the injector housing 5 Remove the screw retaining the fan mounting bracket 6 Remove the fan and venturi assembly Refer to Frame 52 7 Unscrew the 3 screws and remove the venturi assembly noting the orientation of the venturi in relation to the fan body 8 Transfer the venturi assembly to the new fan replacing the gasket if evidence of damage or deteriora...

Page 46: ...ng the fan mounting bracket 6 Remove the fan and venturi assembly 7 Remove the 2 injector housing screws 8 Withdraw the injector housing 9 Fit the new injector housing complete with injector 10 Reassemble in reverse order ensuring that the new gas seal supplied is located correctly in the injector housing 11 Check operation of the boiler Refer to Frames 45 46 Mounting bracket 7 Ecl 2400 5 Injector...

Page 47: ...nition electrode using the new gasket supplied Check dimensions as shown 8 Reassemble in reverse order and check that no damage to the combustion chamber insulation has occurred during the electrode replacement 9 Check the operation of the boiler Refer to Frames 45 46 6 Fit the new flame detection electrode using the new gasket supplied Check dimensions as shown 7 Reassemble in reverse order and c...

Page 48: ...tom panel and withdraw the valve upwards 8 Fit the new gas control valve and reconnect gas and electrical connections 9 Re connect the white tube to the valve 10 Check operation of the boiler Refer to Frames 45 46 67 DIVERTER VALVE ACTUATOR REPLACEMENT 1 Refer to Frame 57 2 Swing the control box down into the servicing position Refer to Frame 51 3 Remove the electrical connections 4 Using a suitab...

Page 49: ...bag should be retained and the discarded insulation should now be placed into it 10 Sweep any dampened particles and place in the plastic bag 11 Fit new insulation piece a Locate and align the insulation with the electrode holes and position the insulation into the combustion chamber b Push the flexible material into the corners of the combustion chamber ensuring it is flat and flush against the c...

Page 50: ...d forward to remove 6 Transfer the drain pipe to the new trap and reassemble in reverse order 7 When reassembling ensure the trap is full of water 8 Check operation of the boiler Refer to Frames 45 46 1 Refer to Frame 77 for draining the appliance 2 Swing the control box into the servicing position Refer to Frame 51 3 Drain the DHW circuit Refer to Frame 77 4 Unscrew the knurled retaining nut 5 Di...

Page 51: ... position Refer to Frame 51 4 Unplug the user control electrical lead and low voltage lead from the control box and remove the control Refer to diagram A 5 Return the control box to the working position and secure with the clamp Unscrew the mounting bracket screws to remove the bracket Refer to diagram B 6 Release the clamp and carefully remove the control box from the hinge arms Refer to diagram ...

Page 52: ... 8 Fit the new safety valve to the pipe and reassemble in reverse order 9 Refill boiler Refer to Frame 36 Check operation of boiler Refer to Frames 45 46 2 Display unit E c l 2 0 4 4 Note Only the display unit is replaced 1 Refer to Frame 57 2 Loosen the screw on the underside of the user control 3 Pull the display unit forward to remove 4 Push the new display unit into position 5 Reassemble in re...

Page 53: ...36 Check for leaks around the new air vent joint 15 Check the operation of the boiler Refer to Frames 45 46 PUMP AIR VENT 1 Refer to Frame 57 2 Swing the control box down into the servicing position refer to frame 51 3 Drain the boiler Refer to frame 77 4 Remove the circulating pump head refer to frame 80 5 Locate the automatic air vent head located at the rear of the of pump chamber plastic housi...

Page 54: ...iler Refer to Frames 45 46 78 DIVERTER VALVE INTERNAL PARTS REPLACEMENT 1 Refer to Frame 57 2 Swing the control box down into the servicing position Refer to Frame 51 3 Drain the boiler Refer to Frame 77 4 Remove the divertor valve actuator head Refer to Frame 67 5 Unscrew the top connection to access the internal parts 6 To allow residual water within the waterset to drain slacken CH isolation va...

Page 55: ... plate heat exchanger using the new o rings supplied 9 Reassemble in reverse order 10 Refill the boiler Refer to Frame 36 11 Check operation of the boiler Refer to Frames 45 46 79 DHW PLATE HEAT EXCHANGER REPLACEMENT 80 PUMP HEAD REPLACEMENT 1 Refer to Frame 57 2 Drain the boiler CH circuit Refer to Frame 77 3 Swing the control box down into the servicing position Refer to Frame 51 4 Disconnect th...

Page 56: ... manifold casting and remove 81 HEAT ENGINE RENEWAL 17 Remove the edge clip securing the dry fire thermistor wiring 18 Remove the clip securing the return pipe 19 Remove the overheat thermostat and the control thermistor Refer to Frame 62 20 Remove the clip to release the flow pipe 21 Remove the condensate S trap Refer to Frame 69 22 Remove the 2 M5 screws securing the interpanel to the back panel...

Page 57: ...ame 57 2 Drain the boiler Refer to Frame 77 3 Unscrew all the gas and water connection unions on the boiler side of the valves 4 Remove the screw from the turret clamp and remove 5 Remove the turret 6 Lift the complete boiler from the wall mounting frame and place on a flat surface face down to expose the expansion vessel 7 Unscrew the union nut on the vessel water connection pipe 8 Unscrew the 2 ...

Page 58: ... TO FRAME 87 ALTERNATING L 8 GO TO FRAME 88 ALTERNATING H 1 GO TO FRAME 89 ALTERNATING H 2 GO TO FRAME 90 ALTERNATING H 3 GO TO FRAME 91 ALTERNATING H 4 GO TO FRAME 92 ALTERNATING H F GO TO FRAME 93 In order to assist fault finding the boiler has an LED diagnostic display The key to the display codes is as follows ALTERNATING H n GO TO FRAME 94 ALTERNATING H E GO TO FRAME 86 ALTERNATING H9 GO TO F...

Page 59: ...sh Is 200V DC supply available at the gas valve see Note NO YES YES Is gas pressure available at the boiler inlet Replace PCB Check gas supply and rectify fault Replace ignition electrode and associated harness as necessary NO Replace gas valve YES NO NO Note Due to the wave form of the rectified voltage the reading will vary depending on the type of meter used to measure the value some may measur...

Page 60: ... YES YES YES YES Check earth connection to the boiler If it is still in excess of 50 V consult a qualified electrician to check the household electrical supply and circuitry LE ONLY Is continuity of OH thermostat correct Correct wiring or replace thermostat HE ONLY Is earth wire connected to detection lead correctly Correct wiring or replace detection lead Have all earths been checked for continui...

Page 61: ...ith water and all isolation and radiator valves open OK NO YES NO Replace overheat thermostat 88 L 8 FAN ERROR Is nominal 330 V DC present across red and blue at the fan connector as reset button is pressed Replace fan YES NO Replace harness 89 H 1 CONTROL THERMISTOR FLOW ERROR YES Is there continuity between the PCB and the thermistor Check resistance using a suitable multimeter connected across ...

Page 62: ...inuity between the PCB and the thermistor Remove the boiler DHW thermistor from the plate heat exchanger and disconnect thermistor wires Are the thermistor values correct Replace the thermistor NO NO YES Replace PCB Check and replace wiring as necessary Check resistance using a suitable multimeter connected across the thermistor s terminal pins At 25 o C expect 9 700 10 300 Ohms At 60 o C expect 2...

Page 63: ...and vented with a system pressure of approximately 1bar H9 L9 HEAT EXCHANGER OVERHEAT Is the system filled and vented and all isolation valves open including TRV s Bypass Check the pump is operating correctly in Heating DHW and check temp diffs across Flow Return YES NO Fill and vent the system and open all isolating valves Are thermistor values correct Check that a permanently open bypass circuit...

Page 64: ...it 1 173 671 36 149 852 PCB primary controls kit V9 1 174 486 37 E67 519 Fuse PCB 3 15A L250V 1 170 931 39 HO7 777 Mains switch c w harness 1 173 537 40 HO7 731 Spark generator assy 1 173 538 45 E67 527 Gasket kit servicing 1 170 938 52 E68 376 Seal kit sealing panel 1 171 014 53 E68 380 Turret gasket 1 171 022 61 H66 650 Pressure relief valve 1 175 413 62 H66 652 Expansion vessel 1 175 415 64 H69...

Page 65: ...65 SHORT LIST OF PARTS evo HE C Installation and Servicing 95 SHORT LIST nm9571a 103 98 ...

Page 66: ...th screws 2 Sealing panel with screws 4 Bottom panel with screw 97 CONTROLS ASSEMBLY 33 Controls assy with screws 34 Controls hinge bracket 35 User controls without item 38 36 PCB primary controls 38 User controls housing 39 Mains switch 54 Jumper link not shown 98 BURNER ASSEMBLY 11 Burner assembly with screws and gasket ...

Page 67: ...67 evo HE C Installation and Servicing ...

Page 68: ......

Page 69: ... contact a government approved inspector LABC will record the data and will issue a certificate of compliance If you notify via Gas Safe Register they will then notify the relevant Local Authority Building Control LABC scheme on members behalf Gas Safe Register Engineers log on to the engineers section of the website at www gassaferegister co uk or telephone 0800 408 5577 You must ensure that the ...

Page 70: ...Gas Safe Register ID Number ...

Page 71: ...gister ID Number Gas Safe Register ID Number Gas Safe Register ID Number Gas Safe Register ID Number Gas Safe Register ID Number Gas Safe Register ID Number Gas Safe Register ID Number Gas Safe Register ID Number Gas Safe Register ID Number ...

Page 72: ...Wolseley Installer Technical Helpline 0870 849 8057 The code of practice for the installation commissioning servicing of central heating systems ...

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