Potterton Promax SL Range Installation & Service Instructions Manual Download | Manualshive

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6.0 System Details

14

© Baxi Heating UK Ltd 2011

6.6

System Controls

This boiler does not require a bypass.
This boiler does not require a permanent live.
The pump only needs wiring directly to the boiler for
fully TRV’d systems.

1. To comply with Part L1 of the Building Regulations the
heating system into which the boiler is installed should
include the following:

a) zone controls
b) timing controls
c) boiler control interlocks

2. Such a system needs to be fully pumped and must
provide independent temperature and time control to
both the heating and hot water circuits and have a boiler
interlock.

3. The boiler should be controlled so that it operates on
demand only. Where it is proposed to effect control by
thermostatic radiator valves, a room thermostat (or
other device such as a flow switch - a flow switch is
integral to this boiler) should also be provided to switch
off the boiler when there is no demand for heating or
hot water.

4. The interlock for the CH circuit can be provided by
either a Room Thermostat or a fully TRV’d system with
the pump wired back to the boiler without a bypass.
Connection diagrams for both options for Y and S plan
systems are shown.

Y Plan

Diverter

Valve

Cylinder

Stat

Room

Stat

Boiler

Pump

Timer

230V
50Hz

L N E

L
N

CH on

HW on
HW off

L

N E

L

N P/F

E

b

g/y

w

o

gr

1

C 2

g/y

S Plan

Valve

Cylinder

Stat

Room

Stat

Boiler

Pump

Timer

230V
50Hz

L N E

L
N

CH on

HW on

L

N E

L

N P/F

E

Motor

S Plan

Valve

Motor

o

o

gr

b

g/y

b

gr

br

br

Y Plan

Diverter

Valve

Cylinder

Stat

Boiler

Pump

Timer

230V
50Hz

L N E

L
N

CH on

HW on
HW off

L

N E

L

N P/F

E

b

g/y

o

gr

1

C 2

w

g/y

S Plan

Valve

Cylinder

Stat

Boiler

Pump

Timer

230V
50Hz

L N E

L
N

CH on

HW on

L

N E

L

N P/F

E

Motor

S Plan

Valve

Motor

o

o

gr

b

g/y

b

gr

br

br

Y Plan, Room Thermostat System, CH Interlocked By Room Thermostat

At least the Radiator(s) near the Room Thermostat not TRV’d
Pump run from Switched Live
By-pass permitted but not required for Part L1 compliance

S Plan, Room Thermostat System, CH Interlocked By Room Thermostat

At least the Radiator(s) near the Room Thermostat not TRV’d
Pump run from Switched Live
By-pass permitted but not required for Part L1 compliance

Y Plan, Fully TRV’d System, CH Interlocked By Boiler Flow Switch

Room Thermostat should not be fitted
Pump must be run from Boiler P/F connection for Part L1 compliance
By-pass not permitted (must be valved off) for Part L1 compliance

S Plan, Fully TRV’d System, CH Interlocked By Boiler Flow Switch

Room Thermostat should not be fitted
Pump must be run from Boiler P/F connection for Part L1 compliance
By-pass not permitted (must be valved off) for Part L1 compliance

Key to colours
b

- Blue

br

- Brown

w

- White

o

- Orange

gr

- Grey

g/y - Green/Yellow

Supplied by HeatingSpares247.com

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Summary of Contents for Promax SL Range

Page 1: ...on Service Instructions These instructions include the Benchmark Commissioning Checklist and should be left with the user for safe keeping Promax SL Range Condensing Central Heating Boiler You can rely on Supplied by HeatingSpares247 com ...

Page 2: ...ich is available from the Heating and Hotwater Industry Council who manage and promote the Scheme Visit www centralheating co uk for more information Building Regulations and the Benchmark Commissioning Checklist Building Regulations England Wales require notification of the installation of a heating appliance to the relevant Local Authority Building Control Department From 1 April 2005 this can b...

Page 3: ...must ensure that the certificate number issued by the Gas Safe Register is written onto the Benchmark Checklist Scheme Members only Call Gas Safe Register on 0800 408 5577 or log onto www GasSafeRegister co uk within 10 days If you notify via the Gas Safe Register the register will issue the Building Regulations certificate on members behalf Complete the Benchmark Checklist Install and Commission ...

Page 4: ...The addition of anything that may interfere with the normal operation of the appliance without express written permission from the manufacturer or his agent could invalidate the appliance warranty In GB this could also infringe the Gas Safety Installation and Use Regulations Warning Check the information on the data plate is compatible with local supply conditions Codes of Practice most recent ver...

Page 5: ...d unobstructed If possible avoid steps wet or slippery surfaces unlit areas etc and take special care on ladders into lofts Technique When handling or lifting always use safe techniques keep your back straight bend your knees Don t twist move your feet avoid bending forwards and sideways and keep the load as close to your body as possible Where possible transport the boiler using a sack truck or o...

Page 6: ...s 12 7 0 Site Requirements 16 8 0 Flue Options 20 9 0 Plume Displacement 25 10 0 Installation 29 11 0 Electrical 35 12 0 Commissioning the Boiler 37 13 0 Fitting the Outer Case 39 14 0 Servicing the Boiler 40 15 0 Changing Components 43 16 0 Short Parts List 50 17 0 Fault Finding 51 Benchmark Checklist 58 Section Page Contents 6 Supplied by HeatingSpares247 com ...

Page 7: ...boiler must be installed with one of the purpose designed flues such as the standard horizontal flue kit part no 236921 1 2 Important Information Man made mineral fibre Some component parts of this appliance insulation pads gaskets and rope seals are manufactured from man made mineral fibre Prolonged or excessive exposure to this material may result in some irritation to the eyes skin or respirato...

Page 8: ...ostat 7 Fan Assembly 8 Condensate Trap 9 PCB Housing Assembly 10 Gas Tap 11 Gas Air Ratio Valve 12 Flow Pipe Connection 13 Return Pipe Connection 14 Flow Temperature Safety Thermostat Black 15 Flow Temperature Thermistor Red 16 Flow Switch dry fire protection 1 2 3 4 5 6 7 9 8 10 11 15 14 12 13 16 Fig 4 Fig 3 Fig 5 Fig 6 Supplied by HeatingSpares247 com ...

Page 9: ...gas rate to achieve optimum operation If the flow temperature is greater than the set point or the TRVs all shut down then fan post purge occurs 6 Fan Post Purge The pump and fan are on while the spark generator and gas valve are off After 5 seconds if the TRVs are not shut down then pump overrun occurs After 5 seconds if the TRVs are shut down then anti cycle occurs 7 Pump Overrun The pump is on ...

Page 10: ...500mm Min Front In Operation 5mm Min 0 10 20 30 40 20 40 60 80 100 120 140 160 180 200 220 Water Flow Rate litres min Pressure Drop mbar 8 17 25 33 42 50 58 66 75 83 91 Pressure Drop in wg Hydraulic Resistance Chart Appliance Type C13 C33 C53 Nox Class 5 Heat Output P Condensing 40 C Mean Water Temp Max Min 12 model kW 12 81 Btu hr 43 400 15 model kW 16 49 10 1 Btu hr 56 260 34 520 18 model kW 19 ...

Page 11: ...he flue elbow should be 27 5mm to incorporate the 1 5 fall in the flue from the terminal to the elbow The 1 5 fall provided by the elbow is to allow condensate to run back to the boiler for disposal through the condensate discharge pipe Flue length Y up to 1m 1m 2m 2m 3m Clearance X 27 5mm 55mm 82 5mm 360 Orientation Tube Ø 110mm D C B A E F Y At Least 1 5 X At Least 1 5 Fig 7 Fig 8 Supplied by He...

Page 12: ...within the system risking damage to pump and valves boiler noise and circulation problems When fitting new systems flux will be evident within the system which can lead to damage of system components All systems must be thoroughly drained and flushed out using for example Sentinel X300 or X400 or Fernox F3 They should be used following the flushing agent manufacturer s instructions System additive...

Page 13: ...he boiler b The pump must be fitted on the flow c The pump must be fitted in accordance with the pump manufacturer s instructions d The open vent pipe must be taken up from a tee in a horizontal section of the flow pipe An alternative Low Head Installation Fig 12 2 For heads below 400mm then a combined vent and feed pipe may be connected This must be a minimum of 22mm diameter It is recommended th...

Page 14: ...HW off L N E L N P F E b g y w o gr 1 C 2 g y S Plan Valve Cylinder Stat Room Stat Boiler Pump Timer 230V 50Hz L N E L N CH on HW on L N E L N P F E Motor S Plan Valve Motor o o gr b g y b gr br br Y Plan Diverter Valve Cylinder Stat Boiler Pump Timer 230V 50Hz L N E L N CH on HW on HW off L N E L N P F E b g y o gr 1 C 2 w g y S Plan Valve Cylinder Stat Boiler Pump Timer 230V 50Hz L N E L N CH on...

Page 15: ...double check valve or some other no less effective backflow prevention device is permanently connected at the inlet to the circuit and the temporary connection is removed after use The filling method adopted must be in accordance with all relevant water supply regulations and use approved equipment Your attention is drawn to for GB Guidance G24 2 and recommendation R24 2 of the Water Regulations G...

Page 16: ...the relevant requirements In GB this is the current I E E Wiring Regulations and Building Regulations In IE reference should be made to the current edition of I S 813 Domestic Gas Installations and the current ETCI rules 4 If the boiler is to be fitted into a building of timber frame construction then reference must be made to the current edition of Institute of Gas Engineers Publication IGE UP 7 ...

Page 17: ...e size to ensure correct operation Do not use pipes of a smaller diameter than the boiler gas connection 7 5 Electrical Supply 1 External wiring must be correctly earthed polarised and in accordance with relevant regulations rules In GB this is the current I E E Wiring Regulations In IE reference should be made to the current edition of ETCI rules 2 The mains supply is 230V 50Hz fused at 3A NOTE T...

Page 18: ...nsate discharge pipe should be treated as an external run 9 In all cases discharge pipe must be installed to aid disposal of the condensate To reduce the risk of condensate being trapped as few bends and fittings as possible should be used 10 When discharging condensate into a soil stack or waste pipe the effects of existing plumbing must be considered If soil pipes or waste pipes are subjected to...

Page 19: ...llation Under car ports we recommend the use of the plume displacement kit The terminal position must ensure the safe and nuisance free dispersal of combustion products Fig 17 Fig 16a 300 min Terminal Assembly TopView Rear Flue Property Boundary Line NOTE The distance from a fanned draught appliance terminal installed parallel to a boundary may not be less than 300mm in accordance with the diagram...

Page 20: ... Flue length is measured from point X to Y as shown IMPORTANT All flue systems must be securely supported at least once every metre Suitable pipe supports are available as accessories X Y X Y Plume Displacement 70 110 dia Kit 1M Extensions 45 93 bends are also available see Section 9 0 NOTE Horizontal flue pipes should always be installed with a 1 5 fall from the terminal to allow condensate to ru...

Page 21: ...ength for this example is 17 2 34 4 51 6 metres 1m extension 135 bend 91 5 bend 1m 1 3m 4 8m 5 2 2 5 0m 2 6m 9 6m AIR DUCT No of fittings pipes Sub total Equivalent Length Value Equivalent Length Air Duct 17 2m 1m extension 135 bend 91 5 bend 2m 2 6m 9 6m 5 2 2 10 0m 5 2m 19 2m FLUE DUCT No of fittings pipes Sub total Equivalent Length Value Equivalent Length Flue Duct 34 4m Y X C Roof Terminal A ...

Page 22: ...rtical Flue Boiler Adaptor 5106888 S Flue Terminal Deflector 248167 FLUE GROUP P Twin Flue System 80mm diameter E Flue Extension pair 1000mm 246137 500mm 246136 250mm 246135 F Flue Bend pair 90 5121560 G Flue Bend 2 pair 135 5121561 J Vertical Flue Boiler Adaptor Kit 242757 W Pipe Support pair 80mm 5111081 FLUE GROUP B P Vertical Flue Kits K Vertical Flue Terminal 242802 L Pitched Roof Flashing 25...

Page 23: ...tical adaptor and gasket to the top panel with the previously removed screws 8 5 For Twin Flue Systems 1 Undo the screws securing the blanking plate to the boiler top panel Discard the plate 2 Fix both the air and flue adaptors with their gaskets onto the boiler top panel Secure with screws For Vertical Flues For Twin Flues Air Duct Adaptor Flue Duct Adaptor Gasket Gasket Supplied by HeatingSpares...

Page 24: ... roof structure with the clamp supplied IMPORTANT If the boiler is not fitted immediately after the flue system temporary precautions must be taken to prevent rain entry into the room of installation Any precautionary measures must be removed prior to commissioning the boiler 8 7 Flue Dimensions The standard horizontal flue kit allows for flue lengths between 270mm 105 8 and 800mm 32 from elbow to...

Page 25: ...centric and 70Ø exhaust 5 Standard concentric flue extension kits may be added between the boiler elbow and the terminal assembly 6 The minimum length of the concentric flue is 100mm when measured from the edge of the boiler flue elbow There is a further 45mm engagement into the elbow IMPORTANT The maximum equivalent length of concentric flue is 4 metres Additional elbows may be fitted in the conc...

Page 26: ...xample 1 Not Permissible If for instance a concentric length of 3 25 metres was required and the 70Ø exhaust needed to be 10 metres the graph shows that this combination would NOT be permissible as the intersection point would be above the solid diagonal line Example 2 Flue Lengths OK Where both lengths have been determined they can be applied to the graph to check that the installation is permiss...

Page 27: ...entric assembly and any extensions and make good inside and outside Secure the flue trim to the wall 9 The 70Ø exhaust can now be fitted to the spigot at the terminal end 10 If it is necessary to shorten the 70Ø exhaust or any of the extensions the excess material must be cut from the plain end of the pipe 11 Determine the position of the 70Ø exhaust and mark on the wall a suitable position for th...

Page 28: ...box but the air inlet and plume outlet MUST remain in free air 17 It is also possible to separate the plume outlet from the 93 elbow to allow the flue to be installed as shown in Fig H 18 When the plume outlet is positioned under a balcony or other projection Figs I J it must protrude at least 200mm it is not necessary to extend it further than this 200mm Min Fig H Fig I Fig J Supplied by HeatingS...

Page 29: ...for wall thicknesses and flue diameters 6 Drill and plug the wall as previously marked Secure the wall plate Fig 22 7 Ensuring the wall plate is level both horizontally and vertically drill and plug at least 5 securing positions at the top and bottom through the wall plate Utilising the slots available ensure the wall plate is square and secure to the wall Fig 22 8 Additionally drill 2 relief hole...

Page 30: ...oiler 1 Remove the outer carton and packaging 2 Lift the outercase upwards and remove 3 Remove the internal packaging Fig 22a Internal Polystyrene Packaging Piece Fig 23 Break Off Upper Lower Pipe Run Options Lower Door Panel Outercase Supplied by HeatingSpares247 com ...

Page 31: ...e return 2 It is essential that the flow and return pipes are connected to the boiler correctly The flow connection incorporates the boiler thermostats and a flow switch 3 The boiler connections will accept 22mm fittings NOTE On 30 models 28mm pipe should be used to connect to the boiler flow and return using suitable reducing fittings 4 If the installation requires that the system pipework origin...

Page 32: ...ke the flue and mark off X from the terminal end as indicated in the diagram Fig 27 Check your dimensions The flue tubes are fixed together Cut through both tubes whilst resting the flue on the semi circular packing pieces Deburr both tube ends 4 For side exit measure the distance from the edge of the wall plate to the inner face of the wall Fig 26 and to this dimension add the wall thickness 250m...

Page 33: ...iler Secure with the four screws supplied in the kit 11 Make good between the wall and air duct outside the building ensuring the 1 5 drop between the terminal and elbow 12 The flue trim should be fitted once the installation is complete and the flue secure Fig 30 Apply a suitable mastic to the inside of the trim and press against the wall finish making sure the brickwork is dust free and dry 13 I...

Page 34: ...hinge down the PCB housing b Remove the Red jumper labelled CN12 from the bottom left hand side of the PCB c Hinge back up the PCB housing and secure with screw 4 Route the incoming electrical cable s through the grommet in the support bracket This will prevent damage to the cable 5 Lay the cable through the cable clamp to gauge the length of cable required when it is connected to the 4 way termin...

Page 35: ...low op Opaque y Yellow Gas Valve g op Spark Electrode g y bk bk bk bk r w w Flame Detection Electrode Condensate Trap Flow Overheat Thermostat Fan Overheat Thermostat g y r b r r Flow Thermistor 325Vdc DC Fan CH Flow Switch gy gy w g br PCB Earths not shown to aid clarity of diagram g y b y L N Optional Pump Feed br g y br b op op Supplied by HeatingSpares247 com ...

Page 36: ...ow 11 2 Illustrated Wiring Diagram GasValve Fan CondensateTrap CH Flow Switch Flow Thermistor Spark Electrode Flame Detection Electrode Main PCB N L r r gy gy r b br g w Flow Overheat Thermostat Fan Overheat Thermostat bk bk bk r bk w w op g y Layout of PCB Pins Optional Pump Feed g y br y g y b br b y b br br Supplied by HeatingSpares247 com ...

Page 37: ...hould be added for future reference 6 Turn the gas supply on and purge according to in GB BS 6891 and in IE I S 813 Domestic Gas Installations 7 Remove the top RH securing screw and hinge down the PCB housing to gain access to the gas service cock see Fig 32 Turn the gas service cock anticlockwise to the ON position and check for gas tightness up to the gas valve Fig 34 NOTE The 12 15 18 24 are se...

Page 38: ...rking Measure the Gas Rate 4 With any other appliances pilot lights turned OFF the gas rate can be measured It should be as shown in Section 4 0 Technical Data 5 Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the boiler and installation These details will be required in the event of any warranty work The public...

Page 39: ...ion of Conformity to indicate compliance to I S 813 An example of this is given in I S 813 Domestic Gas Installations This is in addition to the Benchmark Commissioning Checklist 6 Instruct the user in the operation of the boiler controls Hand over the User s Operating Installation and Servicing Instructions giving advice on the necessity of regular servicing 7 Demonstrate to the user the action r...

Page 40: ...n Maintenance of Gas Fired Boilers not exceeding 70kW advises that The person carrying out a combustion measurement should have been assessed as competent in the use of a flue gas analyser and the interpretation of the results The flue gas analyser used should be one meeting the requirements of BS7927 or BS EN50379 3 and be calibrated in accordance with the analyser manufacturers requirements Comp...

Page 41: ...ction 13 0 WARNING The PCB Control and Fan Assembly are 325 Vdc Isolate at supply before access 7 Release the four 1 4 turn screws securing the air box door panel and remove the door Fig 39 8 Disconnect the leads from the centre and right hand terminals earth and flame sensing probe Fig 40 Reconnect in reverse order 9 Undo the four screws securing the combustion box door and remove the door Fig 41...

Page 42: ... withdraw the base j Lower the central insulation panel and check condition Fig 44 Replace the lower insulation pad if necessary k Ensure the heat exchanger fins are clear of any obstruction l Check condition of all seals Important Pay particular attention to the condition of the combustion box door seals m Reassemble in reverse order and check for leaks 12 Check the CO CO2 ratio and CO2 level at ...

Page 43: ... Isolate the water circuit and drain the system as necessary A drain point is located on the heat exchanger manifold at the right hand side of the boiler Fig 45 to enable the heat exchanger to be drained 4 Place a tube on the drain point to drain water away from electrics Turn anticlockwise to open Fig 45 NOTE When reassembling always fit new O rings ensuring their correct location on the spigot G...

Page 44: ...e to the flowswitch 4 Disconnect the inline electrical connection 5 Pull pipe away from flowswitch 6 Remove the two screws securing the flowswitch to the boiler 7 Remove the flowswitch 8 Fit the new flowswitch and reassemble in reverse order 9 Recommission the boiler and check the inhibitor concentration see Section 6 2 and 12 1 Flow Switch Clip Flow Pipe Fig 47 Support Bracket Supplied by Heating...

Page 45: ...nge down the PCB housing and disconnect the electrical connections noting their positions NOTE Check the PCB for the presence of input jumpers see section 10 8 Set the new PCB as the one removed 2 Lift Control PCB housing out of hinge housing of metal bracket 3 Fit the new PCB Housing Assembly and reassemble in reverse order PCB Housing Securing Screw Fig 48 Blue CN11 Jumper Red CN12 Jumper Fig 49...

Page 46: ...Control and Fan Assembly are 325 Vdc Isolate at supply before access 1 Loosen the screw holding the injector pipe into the venturi 2 Remove the electrical connections to the fan and protection sensor on the fan 3 Remove the wing nuts securing the fan to the base of the combustion box 4 Lower the fan and remove 5 If changing the fan remove the screws securing the venturi and fan protection sensor b...

Page 47: ...the new valve 10 Fit the new gas valve and reassemble in reverse order NOTE Check for gas tightness after replacing gas valve 11 Check the CO CO2 ratio and CO2 level at the flue sampling point Fig 41a is as quoted in Section 4 0 Technical Data 12 If the ratio or level is greater than that quoted telephone the Technical Enquiries for further advice IMPORTANT No adjustment of the gas valve is permis...

Page 48: ...r and reassemble in reverse order 15 11 Heat Exchanger 1 Drain the boiler see section 15 1 paragraph 2 3 2 Remove all components in the base of the airbox 3 Undo the screws on the support bracket Remove the screws securing the flow switch and return connections and remove the connections Fig 57 4 Remove the screws securing the heat exchanger manifold and remove the manifold Fig 58 5 Lift the heat ...

Page 49: ...the lower insulation pad 6 Fit the new insulation pad and reassemble in reverse order 15 13 Heat Exchanger Upper Insulation Pad Fig 60 1 Remove all components in the base of the airbox 2 Remove the burner see section 15 10 3 Remove the heat exchanger see section 15 11 4 Remove the four bolts securing the combustion box base 5 Remove the combustion box base 6 Pull the central insulation panel down ...

Page 50: ...ure Thermistor Red 240670 B E06 059 Flow Switch 242459 C E06 060 Safety Thermostat Black 242235 D PCB 5129147 E Fan 5109925 F Gas Valve 241900 G E06 085 Viewing Window 242484 H Condensate Trap 5111714 I Electrodes Kit 5132097 J Burner Assy 5107430 K E06 097 Heat Exchanger Assy 242497 A B C E F G H I J K D Supplied by HeatingSpares247 com ...

Page 51: ...ring harness PCB Fault Replace PCB PCB Fault Replace PCB PCB Fault Replace PCB YES YES YES YES YES YES YES YES YES YES YES YES Go to Electrical Supply section of the fault finding instructions ON Go to Dry Fire section of the fault finding instructions Go to Overheat Lockout section of the fault finding instructions NOTE The fan is supplied with 325 Vdc Fan Fault Finding should only be carried out...

Page 52: ...and System Wiring 240V at B Check wiring from terminal block to PCB Check for shorts on pump fan gas valve Replace if shorted replace fuse YES NO Replace PCB YES YES NO NO ELECTRICAL SUPPLY 240V at A PCB fuse OK B Fuse A N L Lights Off Off Off ON Optional Pump Live Supplied by HeatingSpares247 com ...

Page 53: ...ec is there 240V at E Pump or Pump Wiring fault Is there a blockage in the system NO YES YES E Optional Pump Live N L F N L Turn mains off unplug 7 way connector to PCB Is there continuity between F and G Wiring from terminal block to PCB faulty NO YES Replace PCB Wires from inline connector to PCB faulty Remove flow switch from boiler Is there a physical blockage to the paddle within the flow swi...

Page 54: ...ES YES NO NO YES Remove Gas Valve check inlet filter for blockage Otherwise incorrect gas supply to boiler Is there at least 18mbar dynamic at gas valve inlet Lead from PCB to Gas Valve faulty Is spark gap between 3 and 4mm Replace spark or flame detection probe and gaskets Is wiring from PCB to spark probe flame detection probe OK NO YES NO NO YES YES NO NO I Remove the larger or the two 6 way PC...

Page 55: ...oor seal trim seal NO YES NO YES Reconnect stat Disconnect fan stat When fan temp 60 C is there continuity across stat Reconnect stat Disconnect the larger of the 6 way PCB connectors Is there continuity across M Disconnect thermistor red sensor on flow pipe Is resistance between 0 5kè 20kè Is combustion chamber door seal damaged or not in place Replace PCB YES Replace thermistor M 6 way Connector...

Page 56: ...y PCB connector Is there continuity from R to S from T to U from V to W Replace fan Rectify wiring YES N P R V T Q O U Viewed from Wire Entry end S W Fan Connection PCB Connection Fan Connection PCB Connection NOTE The fan is supplied with 325 Vdc Fan Fault Finding should only be carried out after the boiler has been electrically isolated Lights Flash Flash On ON Supplied by HeatingSpares247 com ...

Page 57: ...om PCB to thermistor faulty YES NO NO YES Replace PCB Unplug thermistor Is thermistor resistance between 0 5kè 20kè Plug in thermistor leave 8 way connector unplugged Is resistance at D between 0 5kè 20kè D Viewed from Wire Entry end Lights On Flash On ON Supplied by HeatingSpares247 com ...

Page 58: ... s statutory rights If yes and if required by the manufacturer has a water scale reducer been ﬁtted CONDENSING BOILERS ONLY The condensate drain has been installed in accordance with the manufacturer s instructions and or BS5546 BS6798 Yes If the condensate pipe terminates externally has the pipe diameter been increased and weatherproof insulation ﬁtted Yes 58 Supplied by HeatingSpares247 com ...

Page 59: ...ame Telephone No Gas Safe Register No Comments Signature Date Engineer Name Company Name Telephone No Gas Safe Register No Comments Signature Date Engineer Name Company Name Telephone No Gas Safe Register No Comments Signature Date Engineer Name Company Name Telephone No Operative ID No Comments Signature Date Engineer Name Company Name Telephone No Gas Safe Register No Comments Signature Date Eng...

Page 60: ...s 0844 871 1555 Website www potterton co uk e oe All descriptions and illustrations provided in this leaflet have been carefully prepared but we reserve the right to make changes and improvements in our products which may affect the accuracy of the information contained in this leaflet All goods are sold subject to our standard Conditions of Sale which are available on request Supplied by HeatingS...

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