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Baxi 100 He, Installation And Servicing Instructions

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Baxi 100 He Installation And Servicing Instructions Download Page 39

14.0 Fault Finding

39

Fill system and

switch pump on.

Replace control PCB.

Replace flow switch.

Replace control PCB.

Is there 

water in system

and pump on ?

Is 

flow switch short

circuit 

(G)

?

Is 

flow switch

blocked ?

Dry-fire Lockout

NO

NO

NO

YES

YES

YES

Spark
Electrode

Ignition
PCB

Control
PCB

Condensate
Trap

Sensing Electrode

Gas
Valve

Mains 

Input

Optional 
Pump Feed

Transformer

Safety Stat

Fan Protection
Stat

Thermistor

Dry Fire
Flow Switch

DC 
Fan

Interface PCB

br

r

br
w

g/y

g/y

br

b

b

b

b

b bk

br

br

bk

bk

bk

bk

bk

r

r

r

br

g

w

w v b g y o r bk

N P/F

bk

S/L

bk

g/y

Connector 

with

blue label

G

Summary of Contents for 100 He

Page 1: ...Baxi 100 HE Wall Mounted Powered Flue Condensing Boiler Gas Fired Central Heating Unit Installation and Servicing Instructions Please leave these instructions with the user...

Page 2: ...buy Everyone who works at Baxi has a commitment to quality because we know that satisfied customers mean continued success We hope you get a satisfactory service from Baxi If not please let us know N...

Page 3: ...ensions and Fixings 8 6 0 System Details 9 7 0 Site Requirements 12 8 0 Installation 17 9 0 Electrical 23 10 0 Commissioning the Boiler 25 11 0 Fitting the Outer Case 26 12 0 Servicing the Boiler 27 1...

Page 4: ...eous silicate fibres Excessive exposure to these materials may cause temporary irritation to eyes skin and respiratory tract Care must be taken when handling these articles to ensure the release of du...

Page 5: ...istor Red 18 Flow Switch dry fire protection HIGH LO W 1 2 3 4 5 6 7 9 8 10 11 12 13 17 16 14 15 18 Fig 4 Fig 3 Fig 5 2 2 Optional Extras KIT PART No FLUE EXTENSION KITS 110 70 Flue Extension 0 25M 24...

Page 6: ...been made the ignition lockout occurs 5 Burner On The pump fan and gas valve are on while the spark generator is off Flow temperature is controlled by varying the fan speed and thereby the gas rate t...

Page 7: ...5 mbar see Section 10 1 Injector Natural Gas 6 3mm Diameter Clearances For unventilated compartments see Section 7 5 Both Sides 5mm Min Above Casing 200mm Min Below Casing 50mm Min Front For Servicing...

Page 8: ...the flue elbow should be 55mm to incorporate the 3 1 in 20 fall in the flue from the terminal to the elbow The 3 1 in 20 fall provided by the elbow is to allow condensate to run back to the boiler for...

Page 9: ...e the likelihood of these deposits damaging new components When fitting new systems flux will be evident within the system which can lead to damage of system components All systems must be thoroughly...

Page 10: ...r control of the boiler thermostat TRV s only does not produce the best results 6 5 Low Head Installation 1 Using a close couple arrangement the minimum head is as shown in the diagrams Figs 8 9 subje...

Page 11: ...awn to Paragraph 24 of Schedule 2 Section 8 of the publication Water Regulations Guide which gives recommendations and guidance on approved methods for filling sealed systems The sealed primary circui...

Page 12: ...xpress written permission of Baxi UK Limited could invalidate the appliance warranty and infringe the GAS SAFETY Installation and Use REGULATIONS 7 3 Clearances Figs 12 13 1 A flat vertical area is re...

Page 13: ...ted to the appliance gas service cock This should extend for at least 3 meters back towards the gas meter Do not use pipes of a smaller diameter than the boiler gas connection 7 7 Electrical Supply 1...

Page 14: ...external paint 8 If a terminal is less than 2 metres 783 4 in above a balcony above ground or above a flat roof to which people have access then a suitable terminal guard must be provided Fig 17 Fig...

Page 15: ...practice dictate the use of terminal guards they can be obtained from most Plumbers and Builders Merchants 2 When ordering a terminal guard quote the appliance model number 3 The flue terminal guard s...

Page 16: ...42886 Clamp 80mm 238684 7 13 Flue options Concentric The maximum equivalent lengths are 4m horizontal or vertical There lengths exclude the standard elbow and flue terminal assembly horizontal and ter...

Page 17: ...flue minimum diameter 125mm see table for wall thicknesses and flue diameters 6 Drill and plug the wall as previously marked Secure the wall plate using the centre hole 7 Ensuring the wall plate is l...

Page 18: ...r carton 2 Remove the internal packaging 3 Lift the outercase upwards and remove Fig 23 Baxi UK Limited declare that no substances harmful to health are contained in the appliance or used during appli...

Page 19: ...compression nut and olive are provided in the kit for the return connection NOTE Drain cocks should be fitted to all system s low points and vents to all high points 4 Ensure that any pipework is rout...

Page 20: ...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 Debu...

Page 21: ...etween the wall and air duct outside the building ensuring the 3 drop between the terminal and elbow 12 The flue trim should be fitted once the installation is complete and the flue secure Fig 30 Appl...

Page 22: ...in conjunction with a Thermal Store the boiler can be adjusted as follows a Draw the control PCB forwards out of the electrical box the control PCB is the right hand board b Remove jumper No 2 c Repla...

Page 23: ...Orange Spark Electrode Ignition PCB Control PCB Condensate Trap Sensing Electrode Gas Valve Mains Input Optional Pump Feed Transformer Safety Stat Fan Protection Stat Thermistor Dry Fire Flow Switch...

Page 24: ...Condensate Trap Sensing Electrode bk bk w w br r b br b br br br bk bk bk b w b y r v g o bk bk b bk r r b bk g y g y g y Flow Switch Fan Control PCB Interface PCB Mains Input Transformer Safety Ther...

Page 25: ...ON position and check for gas soundness up to the gas valve Fig 34 6 Turn the boiler control knob fully clockwise to HIGH Fig 35 and run the system and check the boiler for correct operation NOTE The...

Page 26: ...er controls Hand over the User s Operating Installation and Servicing Instructions and the Log Book giving advice on the necessity of regular servicing 7 Advise the user that they may observe a plume...

Page 27: ...lower door panel see Fitting the Outercase Section 11 0 6 Release the four 1 4 turn screws securing the air box door panel and remove the door Fig 40 7 Disconnect the leads from the centre and right h...

Page 28: ...gile handle with care Clean and if necessary replace the burner Fig 44 see note above h Loosen the two screws retaining the heat exchanger support bracket and slide to the left to remove Fig 44 i Remo...

Page 29: ...e 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 f...

Page 30: ...h 2 3 2 Disconnect pipework loosen elbow locking nut and undo screws on support bracket 3 Remove the clip securing the flow pipe to the flowswitch 4 Remove the two screws securing the flow switch to t...

Page 31: ...d side and disconnect the electrical connections noting their positions 2 Fit the new ignition board and reassemble in reverse order 13 7 Transformer Fig 54 1 After the removal of the control and igni...

Page 32: ...e in reverse order NOTE The spark electrode sleeve should always cover the joint in the electrode lead to prevent tracking 13 9 Fan Fig 57 1 Loosen the screw holding the injector pipe into the venturi...

Page 33: ...gas valve 6 Remove the gas valve from the airbox side 7 Remove the nut union aluminium spacer and its gasket from the gas valve 8 Fit the nut union aluminium spacer and its gasket to the new valve 9 F...

Page 34: ...ase 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 64 4 Remove the electrical connections from...

Page 35: ...e lower insulation pad 6 Fit the new insulation pad and reassemble in reverse order 13 16 Heat Exchanger Upper Insulation Pad Fig 65 1 Remove all components in the base of the airbox 2 Remove the burn...

Page 36: ...ection of the fault finding instructions YES NO YES NO YES Lockout LED flashing once every 4 seconds Go to THERMISTOR OPEN CIRCUIT section of the fault finding instructions YES NO NO YES NO YES NO YES...

Page 37: ...rol PCB Replace transformer Check for short circuits on control PCB and fan If OK replace fuse Rectify wiring Replace control PCB Replace interface PCB YES NO Is there 24 V at control PCB transformer...

Page 38: ...NO NO YES YES YES Mains LED Flashing Spark Electrode Ignition PCB Control PCB Condensate Trap Sensing Electrode Gas Valve Mains Input Optional Pump Feed Transformer Safety Stat Fan Protection Stat Th...

Page 39: ...h blocked Dry fire Lockout NO NO NO YES YES YES Spark Electrode Ignition PCB Control PCB Condensate Trap Sensing Electrode Gas Valve Mains Input Optional Pump Feed Transformer Safety Stat Fan Protecti...

Page 40: ...Safety thermostat open circuit measured at safety thermostat NO YES YES NO NO NO YES YES NO Safety Lockout Open circuit across thermistor connections Open circuit across thermistor connections on cont...

Page 41: ...circuit when on and open circuit when off J Replace control PCB YES YES YES NO NO NO NO No Lockout Reset No Fan YES YES NO NO Is flow temperature thermistor between 0 5k and 20k measured at flow temp...

Page 42: ...as check at meter Is there 230V at control PCB connection to ignition PCB M Is there gas but no spark Is spark probe damaged Replace spark probe Is there spark but no gas Is there 230V at ignition PCB...

Page 43: ...230Vdc at the end of the gas valve lead Replace gas valve lead Replace gas valve Replace control PCB Is there 230V ignition PCB burner on pin to control PCB P Replace ignition PCB Burner On wiring fro...

Page 44: ...at Black 242235 8 E06 064 Control PCB 5106789 9 E06 065 Ignition PCB 241838 10 E06 066 Transformer 240236 21 E06 074 Fan 242472 23 E06 075 Gas Valve 242473 28 E06 079 Interface PCB 241839 38 E06 085 V...

Page 45: ...16 0 Notes 45...

Page 46: ...16 0 Notes 46...

Page 47: ...the domestic heating market Gas Central Heating Boilers Wall Floor and Fireside models Independent Gas Fires Renewal Firefronts Gas Wall Heaters Solid Fuel Fires If you require information on any of...

Page 48: ...Baxi UK Limited Brownedge Road Bamber Bridge Preston Lancashire PR5 6SN www baxi com After Sales Service 08706 096 096 Technical Enquiries 08706 049 049 Comp No 5106739 Iss 4 9 02...

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