Ideal Boilers responce 100 Installation And Servicing Manual Download Page 42

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Response 80 / 100 / 120

- Installation

PRINTED CIRCUIT BOARD REPLACEMENT

HW EXPANSION VESSEL

SER

VICING

SERVICING

The Response uses:

PCB 41 - Ignition sequence

PCB 40 - Logic sequence

Fan speed control

1. Isolate the electrical supply.

Refer to Frame 54.

2. Remove the front panel.

3. Remove the PCB cover

4. Disconnect all 'Molex' plugs

feeding the PCB to be
changed.

5. Release the clips and

remove the PCB.

6. Fit the new board onto the

clips.

7. Replace all 'Molex'

connectors. Note that the
connectors are made non-
interchangeable. If in doubt,
refer to Frame 40 - Pictorial
Wiring.

8. Reassemble in reverse

order

9. Test both DHW and CH

modes of operation.

1. Disconnect the electrical

supply to the boiler.

2. Remove the front and sealing

panels. Refer to Frame 48.

3. Close the isolating valve on

the HW supply then release
pressure by opening a hot tap.
Note.

Ensure valve markings

are as shown.

4. Drain, using the drain point on

the isolating valve.

5. Unscrew the HW expansion

vessel, which may be finger-
tight. If necessary, remove the
fan (see Frame 65). To access
use a spanner on the hexagon
nut behind the vessel.

6. Replace with new sealing

gasket and vessel.
Reassemble in reverse order
and test fire.

PCB 41

Summary of Contents for responce 100

Page 1: ......

Page 2: ...gas water and electrical connections before the boiler is fitted and it fits inside a cupboard Its compact size up to half that of other combis makes the Response ideal for any kitchen It can be installed inside a standard size kitchen wall unit without insulation and with minimal ventilation Response The combi you can rely on The Response has been designed and developed with reliability as the nu...

Page 3: ...ue temp mass flow rate 235 o C 11 8 g s 235 o C 14 7 g s 235 o C 14 7 g s Max DHW water inlet pressure bar lb in2 10 0 145 0 10 0 145 0 10 0 145 0 Min DHW water inlet pressure bar lb in2 1 0 14 1 2 17 1 2 17 Dry lift weight kg lb 50 110 51 2 112 51 2 112 Water content Central heating litre gal 1 7 0 37 1 7 0 37 1 7 0 37 Domestic hot water litre gal 0 48 0 11 0 7 0 15 0 7 0 15 Table 1 General Data ...

Page 4: ...emperature of 60 o C The boiler casing is of white painted mild steel with a drop down controls access door The boiler temperature control is located behind the controls access door The heat exchanger is made of copper and cast iron The system pipework must include drain cocks in appropriate places Pipework may be taken downwards or upwards behind the boiler using the stand off channels OPTIONAL E...

Page 5: ...ler is then directed by the automatic switching off of the circulation pump to heat the inner coils and supply a maximum draw off of Response 80 9 6 l min 2 1 gpm at 35 0 rise Response 100 12 0 l min 2 6 gpm at 35 0 rise Response 120 14 4 l min 3 1 gpm at 35 0 rise The nominal DHW temperature is 60 o C but water drawn off when the boiler has been on for central heating may be hotter than this for ...

Page 6: ...ing the space in which the boiler is to be installed must be at least wide enough to accommodate the tool Boiler connections are made on the mounting frame Refer to Frame GENERAL Front clearance The minimum front clearance when built in to a cupboard is 5mm 1 4 from the cupboard door but 450mm 17 3 4 overall clearance is still required with the cupboard door open to allow for servicing See Table 4...

Page 7: ...ed by a CORGI registered installer in accordance with the above regulations Failure to install appliances correctly could lead to prosecution It is in your own interest and that of safety to ensure the law is complied with The installation of the boiler MUST also be in accordance with the latest I E E BS 7671 Wiring Regulations local building regulations bye laws of the local water authority the b...

Page 8: ...ee passage of air across it at all times 3 Minimum acceptable spacing from the terminal to obstructions and ventilation openings are specified in Table 6 4 Where the lowest part of the terminal is fitted less than 2m 6 6 above a balcony above ground or above a flat roof to which people have access then the terminal MUST be protected by a purpose designed guard The minimum spacing in Table 6 Nos 2 ...

Page 9: ...nstallation should be designed to work with flow temperatures of up to 90 C 4 Working Pressure All components of the system must be suitable for a working pressure of 3 bar 45 lb in2 and temperature of 110 C Extra care should be taken in making all connections so that the risk of leakage is minimised The following components are incorporated within the appliance a Circulating pump b Safety valve w...

Page 10: ... pressurise the system to the desired charge pressure see table below 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 6 Size of expansion vessel For the system water expansion to be contained by the 8 litre expansion vessel fitted to the boiler the cold system volume must not exceed 1...

Page 11: ...te l sec 0 382 0 508 gal min 5 04 6 7 Temperature o C 11 11 differential o F 20 20 Head available for m w g 2 75 2 5 system pump pos 3 ft w g 9 0 8 0 Water Flow Rate and Pressure Loss 9 Draining the system Draining taps MUST be located in accessible positions to permit the draining of the whole central heating system including the central heating side of the boiler The taps should be at least 1 2 ...

Page 12: ...Pressure sensing pip 30 EMC filter 32 CH Return pipe assy 33 Pump pipe assy 34 CH Lower flow pipe assy 35 CH Upper flow pipe assy 36 DHW Upper cold pipe assy 37 DHW Upper hot pipe assy 38 DHW Lower cold pipe assy 39 DHW Lower hot pipe assy 40 Boiler front panel 41 Sealing panel 44 Tank cover assy 45 Controls door assy 59 Turret clamp 67 Transformer 11 Boiler overheat t stat 12 Water pressure switc...

Page 13: ...or side flue outlet in Pack B Unpack and check the contents Pack A Contents The boiler These Installation Servicing Instructions The User s Instructions Wall mounting template Wall mounting frame 1 pair stand off channels optional use Flue turret Clamping and sealing ring Mains connector assy Hardware Pack Coupling Hardware Pack Hardware Pack M6 x 16 Pp Hd screw 4 off 1 2 x 15mm copper connector 1...

Page 14: ...it may be necessary to shorten the standard flue before adding extension duct s in order to prevent interference between flue duct connections and the boiler flue elbow 4000mm maximum for the 100 and 120 only Calculate the total length of flue by the following Rear flue length Dim W 79mm 3 1 8 Rear flue length with stand off channels Dim W 109mm 4 3 8 RHS flue length Dim R 220mm 8 5 8 LHS flue len...

Page 15: ...ot be fitted close to a corner 11 REAR FLUE ASSEMBLY Exploded View 12 WALL MOUNTING TEMPLATE Rear Flue IMPORTANT For direct mounting wall mounting frame on wall choose one black dot in each group If using the stand off channels choose one dotted circle in each group Care MUST be taken to ensure the correct holes are drilled 1 Tape the template into the selected position 2 Ensure squareness by hang...

Page 16: ...into the wall plugs and leave 10mm proud Hang the frame onto the screws and tighten up or b Use stand off channels To allow pipework to be taken upwards Insert wall plugs Put the screws into the wall plugs and leave 10mm proud Fasten each channel to the frame with the 6mm screws provided Hang the channels and frame onto the screws and tighten up Note If the clearances above and below the boiler ar...

Page 17: ...d 5 Remove the cardboard support and any burrs For flue lengths greater than 600mm 23 5 8 refer to Frames 30 to 32 Flue Extension Ducts 16 FITTING THE FLUE IMPORTANT To facilitate turret fixing or removal do NOT make good the wall 1 Attach the clamping sealing rings to the flue this prevents the assembly being pushed right through the hole and causing an accident 2 Pass the cut flue through the pr...

Page 18: ... the cable clamps Refer to Frame 39 2 WARNING ENSURE that the plastic plugs are removed from both the DHW and CH pipes before mounting N B Some spillage of water may occur from the pipework when mounting the boiler to the frame 3 Lift the boiler onto the wall mounting frame locating it over the tabs at the top of the frame 4 Lower the boiler into position 5 Remove the bottom panel to access servic...

Page 19: ...ugh neatly or c When the wall face is rough and the rubber seal on its own would be ineffective 1 Position the terminal wall plate over the terminal 2 Drill 4 fixing holes with a 7mm 1 4 masonry drill 3 Insert the 4 plastic plugs provided in flue pack B 4 Secure the plate with 4 of the No 10 x 2 screws provided in flue pack B Note If the terminal is less than 2m 6 6 above ground level an approved ...

Page 20: ... Refer to Frame 10 1 Tape template into the selected position 2 Ensure squareness by hanging a plumbline as shown 3 Mark onto the wall the following a The 6 wall mounting plate screw positions choose one from each group b Extended the centre line as shown Mark the flue duct centre from the corner see diagram and template Note Mark the centre of the hole as well as the circumference 4 Remove templa...

Page 21: ...inal is to be sited within 25 40mm of a corner or vertical pipe refer to Table 3 then the hole MUST be accurately cut and the rubber weather seal trimmed around the groove provided The terminal wall plate need not be fitted IMPORTANT Ensure that during the cutting operation masonry falling outside the building does not cause damage or personal injury 1 Cut the flue hole preferably with a 5 core bo...

Page 22: ...frame with the 6mm screws provided Hang channels and frame onto the screws and tighten up Note If the clearances above and below the boiler are less than the length of the pipes it will be necessary to position the pipes behind the wall mounting plate BEFORE the plate is screwed to the wall Flues up to 600mm 23 5 8 1 Attach the clamping sealing rings to the flue this prevents the assembly being pu...

Page 23: ...cket using the spacer bracket and long wood screw INSTALLATION SIDE FLUE OUTLET 1 The boiler may be prewired to the loose electrical connector and secured with the cable clamps Refer to Frame 39 2 WARNING Ensure that the plastic plugs are removed from both the DHW and CH pipes before mounting N B Some spillage of water may occur from the pipework when mounting the boiler to the frame 3 Lift the bo...

Page 24: ...ugh neatly or c When the wall face is rough and the rubber seal on its own would be ineffective 1 Position the terminal wall plate over the terminal 2 Drill 4 fixing holes with a 7mm 1 4 masonry drill 3 Insert the 4 plastic plugs provided in flue pack B 4 Secure the plate with 4 of the No 10 x 2 screws provided in flue pack B Note If the terminal is less than 2m 6 6 above ground level an approved ...

Page 25: ...dboard support aid from the flue and place safely to one side 2 Fit the inner flue extension duct onto the inner flue duct 3 Fit the outer flue extension duct onto the outer air duct 4 Drill one 3 2mm 1 8 dia hole through the outer air duct Do not drill the inner flue duct 5 Insert the self tapping screw provided to fix the air duct in position 6 Repeat steps 1 5 if a second flue extension is requ...

Page 26: ...UE TO THE TURRET 1 Insert the flue into the prepared hole Refer to Frame 26 for details 2 Mate the flue to the turret Refer to Frame 28 for details Note To facilitate turret fixing or removal do NOT make good the wall 32 CUTTING THE FLUE TO LENGTH 34 SERVICE CONNECTIONS General Notes 1 As detailed in Frames 14 and 23 24 Fitting the Wall Mounting Frame top entry pipework is an option as well as mou...

Page 27: ...e Extend a gas supply pipe of not less than 22mm O D copper or 3 4 BSP iron to the boiler A working gas pressure of 20mbar 8 w g must be available at the boiler inlet with the boiler firing at full DHW output INSTALLATION DHWCONNECTIONS CH CONNECTIONS For central heating loads greater than 60 000 BTU s the flow and return circuits should be increase to 28mm pipe diameter immediately upon leaving t...

Page 28: ...Secure the connector to the panel with the screw Incoming mains wiring detail INSTALLATION INSTALLATION WARNING This appliance MUST be efficiently earthed A mains supply of 230 V 50 Hz is required The fuse rating should be 3 A All external controls and wiring MUST be suitable for mains voltage Wiring should be 3 core PVC insulated flexible cord NOT LESS than 0 75 mm2 24 x 0 2mm and to BS 6500 Tabl...

Page 29: ...3 v v 41 FUNCTIONAL FLOW WIRING DIAGRAM INSTALLATION INSTALLATION 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 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 ...

Page 30: ...ly the boiler and system controls The means of isolation must be accessible to the user after installation Internal Programmer The Ideal Programmer Kit is supplied with its own instructions Associated controls should be wired as shown in Diagram A External Single Channel Programmer This should be wired as shown in Diagram B External Two Channel Programmer This should be wired as shown in Diagram C...

Page 31: ...ssure see Frame 36 is at least 20 mbar when the boiler is firing 13 Set the boiler on off switch C to OFF 14 Remove the pressure gauge and tube Replace the sealing screw in the pressure test point Ensure a gas tight seal is made 15 Refit the boiler front panel using the screw previously removed 16 Switch the boiler on again IMPORTANT Before lighting the boiler you should note especially that a To ...

Page 32: ...ckshield valves be set a half turn open and the bypass a half turn to one turn open a minimum of one turn open is recommended when TRVs are used Make minor adjustments to each radiator to achieve the same differential on all Lastly set the bypass to eliminate any boiler noise without compromising radiator temperatures 5 Finally set the system controls to the user s requirements 6 Remove the labels...

Page 33: ...e tabs from the slots 1 Turn off the gas supply at the gas service cock and disconnect the electricity supply 2 Remove the screw and lift off the boiler front panel SERVICING SERVICING To ensure the continued safe and efficient operation of the appliance it is recommended that it is checked at regular intervals and serviced as necessary The frequency of servicingwilldependupontheinstallationcondit...

Page 34: ...h or renew as necessary Refer to Frame 65 for replacement Note Always take care when handling the fan in order to preserve the balance of the impeller 50 BURNER REMOVAL AND CLEANING 6 Check the spark and electrode gaps are correct 7 Check that the spark and detection leads are in good condition and renew as necessary 1 After removing the fan as already described disconnect the 2 ignition leads and...

Page 35: ...the boiler models Frame 45 Gas rate Note that the pressure is set by the gas valve according to fan speed which in turn is controlled by reference to boiler temperature and mode CH HW thus the burner pressure should be checked at maximum demand for CH or HW as appropriate Frame 82 deals with possible causes of incorrect burner pressure 52 RE ASSEMBLY 5 Refit the fan venturi and sensing pipe assemb...

Page 36: ...system to foul the valve 6 Disconnect the plug in lead from the temperature sensor and unscrew the sensor to release it 7 Screw in the new sensor using thread sealant reconnect and re assemble in reverse order 8 Open cock s and refill repressurise pipework 9 Test fire the boiler 10 Disconnect the filling loop if used SERVICING SERVICING 1 Disconnect the electrical supply 2 Remove the boiler front ...

Page 37: ... to Frame 48 2 Remove the PCB cover 3 Undo the securing screw and lift off the spark generator cover if fitted 4 Disconnect the electrical leads from the spark generator 5 Withdraw the spark generator 6 Fit the new spark generator and re assemble in reverse order 7 Check the operation of the boiler 3 Release the screws securing the pressure gauge subpanel and allow the panel to move to one side 4 ...

Page 38: ...anger taking care not to damage the electrodes 6 Remove the spark and detection electrodes Refer to Frame 58 7 Remove the 3 securing screws and withdraw the burner from the mounting flange 8 Fit the new burner replacing any damaged or deteriorating gasket 9 Re assemble in reverse order Note Check the spark and detection gaps 61 BURNER INJECTOR REPLACEMENT SERVICING SERVICING 1 Refer to Frame 48 2 ...

Page 39: ...9 5 Remove the 2 securing screws from the pressure gauge sub panel 6 Gently ease the pressure switch housing out of the pressure switch sensing hose 7 Unplug the electrical leads from the gas valve 8 Undo the gas cock union connection 9 Undo the 2 extended nuts retaining the gas injection pipe and withdraw the pipe taking care not to lose the O ring seal Undo the third nut and the gas outlet manif...

Page 40: ...he controls panel 4 Close the isolating valves on the CH flow return at the base of the boiler then release CH system pressure by opening one of the CH drain cocks on the isolating valves It is not advisable to release system pressure using the safety valve SERVICING SERVICING 10 Supporting the valve undo the 4 retaining screws and withdraw the gas valve leaving the plate with the 3 studs in place...

Page 41: ...care when handling the fan in order to preserve the balance of the impeller 6 Fit the new fan ensuring that a All seals are correctly refitted b The sensing pipe is correctly refitted c The fan is fully engaged 7 Check the operation of the new fan SERVICING SERVICING 65A FLOW RESTRICTOR CLEANING REPLACEMENT where fitted The restrictor is a plastic piece fitted between the lower and upper cold pipe...

Page 42: ...re made non interchangeable If in doubt refer to Frame 40 Pictorial Wiring 8 Reassemble in reverse order 9 Test both DHW and CH modes of operation 1 Disconnect the electrical supply to the boiler 2 Remove the front and sealing panels Refer to Frame 48 3 Close the isolating valve on the HW supply then release pressure by opening a hot tap Note Ensure valve markings are as shown 4 Drain using the dr...

Page 43: ...are on the same side as the inlet pipe If necessary use an Allen key to remove the motor and reposition it 10 Transfer the short inlet pipe to the inlet side of the replacement pump using a new sealing washer 11 Make the electrical connections 12 Offer the pump pipe assembly to the boiler using the second new washer on the pump outlet union Tighten the water connections 13 Close the drain cock and...

Page 44: ...ler together with the screw securing the turret to the flue pipe Remove the turret 7 Remove the fan venturi and sensing pipe Refer to Frame 49 8 Unscrew and remove the HW expansion vessel 9 Undo the 2 extended nuts securing the gas injection pipe and remove 10 Disconnect the spark electrode leads and the flame sensing electrode lead at the burner base Refer to Frame 58 11 Remove the 3 screws secur...

Page 45: ... the control panel 6 Compress the clips on the sides of the programmer and withdraw it from the retaining bracket 7 Fit the new programmer and re assemble in reverse order 8 Check the operation of the new programmer 72 WATER PRESSURE SWITCH 1 Disconnect the electricity supply Refer to Frame 54 2 Close the CH flow and return isolating valves at the bottom of the boiler Use the drain points on these...

Page 46: ...Open the isolating valve and bleed air out at the tap s 11 Reconnect the electrical supply and open a HW tap to test operation of the boiler SERVICING 74 WATER FLOW SWITCH REPLACEMENT SERVICING 75 INLET FILTER CLEANING The filter comprises a gauze disc in a synthetic rubber carrier ring It is secured at the front outlet of the cold water isolating valve by means of the union connection between the...

Page 47: ...er 8 Replace with a new valve and restore the pipework in reverse order using new sealing washer 9 Open cocks fit filling loop fill vent and pressurise to 1 bar or as required 10 Restore the electrical supply and set the heating controls to test fire the boiler 11 Vent air and top up the pressure again as required 12 Remove the filling loop 76 MAINS TRANSFORMER REPLACEMENT 1 Isolate the electrical...

Page 48: ...panel and remove the panel to gain access to the expansion vessel connector Where RH clearance is NOT available Remove the fan refer Frame 49 and gas valve refer Frame 62 to gain access to the expansion vessel connector B4 Disconnect the flue if RH exit and remove to the right general details are reverse of Frames 18 28 B5 Undo the 3 screws securing the boiler panel above the expansion vessel and ...

Page 49: ...me is not detected the spark stops the gas valve closes the fan continues to run for a post purge The gas valve reopens and the spark restarts PCB 41 will attempt 4 ignitions If all 4 attempts fail the lockout LED comes ON Foot Note Presence of Live supply on a terminal may be checked with a multimeter set to the appropriate AC range apply the other probe of the meter to mains neutral e g on termi...

Page 50: ...nections OK YES Is the CH light on PCB 40 flashing Check the lead to the pump Replace cap Switch off and change pump YES Is the HW light lit on PCB 40 If the boiler has been unused with mains off the pump may be stuck Remove screw cap on the pump head and turn the shaft with a screwdriver until free Does the pump now run YES NO Check all connections to PCB 40 Check for moisture on PCB 40 If no fau...

Page 51: ...es the switch close Reconnect the flow switch Unplug the lead from the HW sensor and transfer temporarily to a replacement sensor Will the boiler operate Fit new HW sensor which has failed low resistance Check all connections to PCB 40 Check for moisture on PCB 40 If no fault found check PCB 40 by substitution WARNING When panels are removed for service live parts are exposed so caution should be ...

Page 52: ...S Replace fuse Examine fan harness checking especially for short circuits between wires or terminals If no fault found power up board without fan harness connected Does fuse F1 blow YES NO YES EXIT YES YES Does the fan run NO Replace PCB 40 NO Is there mains voltage between primary terminals brown and blue leads of mains transformer Expect 230V 50Hz 10 YES YES Has the mains fuse F2 on PCB 40 blown...

Page 53: ... cock fully open NO NO Is the gas supply pressure adequate at the appliance inlet during an ignition trial period i e when LED 2 on PCB 41 goes off NO YES Contact the gas supplier Is the supply pressure correct at the gas meter Rectify the fault and take steps to prevent recurrence NO Is there Live on the brown lead of the gas valve connector on PCB 41 during an ignition trial period Are both conn...

Page 54: ...lectrodes or leads externally to the burner YES YES NO Rectify poor connections or replace the spark generator or electrodes Remove the fan and burner assembly and reconnect spark leads to the electrode terminals Check that the gap between terminals is 4 to 5mm and that the distance to the flame strip is 7mm 1mm With gas OFF do another ignition cycle Is the spark OK now YES NO YES NO Re assemble a...

Page 55: ...1mm of the burner at closest point Rectify any fault Does the boiler now run YES Is this a new installation Has any electrical work been done to the boiler or the house wiring YES Check the polarity of the incoming mains to the boiler see footnote Is this correct YES Check the polarity of the mains input to PCB 41 when the fan starts Is this correct Does the boiler now run Remove the burner assemb...

Page 56: ...y valve free from foreign matter correctly set and in the closed position NO YES Replace safety valve and refill repressurise Fire the boiler up on CH Observe pressure gauge as system reaches temperature Does pressure reach or exceed 2 5 bars YES Recheck for leaks on pipes and radiators Unscrew the Schrader valve from expansion vessel and fit new valve e g from car tyre sales outlet Repressurise e...

Page 57: ...ipe 29 Sensing pipe clamp plate 54 Fan burner mounting O ring 55 Fan O ring 56 Pressure pipe O ring 57 Gas manifold gasket 58 Gas valve gasket 68 Gas cock 1 2 74 Injector pipe O ring 75 Gas elbow O ring LEGEND 1 Burner 2 Burner injector 3 Gas valve 4 Flame sensing electrode 5 Ignition electrode 19 Fan assembly ...

Page 58: ...8 Response 80 100 120 Installation SHORT LIST OF PARTS 88 CONTROLS AREA Exploded View Legend 7 PCB 41 8 PCB 40 9 Fan speed control board 10 Spark generator assembly 30 EMC filter 67 Transformer assembly ...

Page 59: ...01 143 Response 80 1 075212 E01 797 Response 100 120 1 075213 4 Flame sensing electrode Buccleuch c w 1 off sensing electrode gasket 1 off M4 x 10 lg pozi pan hd screw 1 off M4 shakeproof washer 1 152033 5 E01 972 Ignition electrode Buccleuch c w 1 off ignition electrode gasket 1 off M4 x 10 lg pozi pan hd screw 1 off M4 shakeproof washer 1 075269 7 E00 046 PCB 41 Pactrol c w 4 off PCB stand offs ...

Page 60: ...bly c w 6 off M4 x 10 lg pozi hex hd screws 1 075192 43 E00 081 Boiler RH side panel assembly c w 6 off M4 x 10 lg pozi hex hd screws 1 075193 44 E00 082 Tank cover panel assembly c w 3 off M4 x 10 lg pozi hex hd screws 1 075194 45 Controls pod door assembly consisting of controls pod door counter plate Lighting Instruction Plate 2 off buffer pads E02 148 Response 80 1 075261 Response 100 1 075338...

Page 61: ...61 Response 80 100 120 Installation 89 SHORT PARTS LIST 90 BOILER CASING ASSEMBLY SHORT LIST OF PARTS Res 5972 ...

Page 62: ...62 Response 80 100 120 Installation NOTES ...

Page 63: ...63 Response 80 100 120 Installation NOTES ...

Page 64: ...rved to vary specification without notice The Ideal Boilers Technical Training Centre offers a series of first class training courses for domestic commercial and industrial heating installers engineers and system specifiers For details of courses please ring 01482 498 432 CERTIFIED PRODUCT Manufactured under a BS EN ISO 9001 1994 Quality System accepted by BSI The code of practice for the installa...

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Ideal Boilers responce 100, Installation And Servicing Manual

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