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4.0 Technical Data

Flue Terminal

Diameter

110mm

Dimensions

Projection

150mm

Outercase Dimensions

Casing Height

850mm

Overall Height Inc Flue
Elbow

1000mm

Casing Width

490mm

Casing Depth

320mm

Clearances

Both Sides

5mm Min

Above Casing

200mm Min

Below Casing

200mm Min

Front

500mm Min

(For Servicing)

Front

5mm Min

(In Operation)

Weights

Packaged Boiler Carton

58.2

128.3

Packaged Flue Kit

3.8

8.4

Weight Empty

53.2

117.3

Installation Lift Weight

44.4

Central Heating Primary Circuit
Pressures

bar

lb/in

Safety Discharge

43.5

Max Operating

2.5

36.3

Min Operating

0.7

10.2

Recommend Operating

1-2

14.5-29

DHW Circuit

bar

lb/in

Pressures

Max Operating

145

Min Operating

0.1

1.45

Min Operating Pressure
at 10 l/min

0.39

23.2

Flow Rates

l/min

gal/min

DHW Flow Rate
@ 30

C Rise

11.7

2.57

DHW Flow Rate
@ 35

C Rise

2.20

Min Working
DHW Flow Rate

1.9

0.43

Pump

Available Head

See graph below

Expansion Vessel

(For Central Heating

only. Integral with appliance)

bar

lb/in

Min Pre-charge Pressure

0.95

13.8

Nominal Pre-charge
Pressure

14.5

litre

gal

Max Capacity of
CH System

125

27.5

Primary Water Content
of Boiler (unpressurised)

3.5

6.2

Connections

compression

Gas Supply

” BSPF

Central Heating Flow

22mm

Central Heating Return

22mm

Cold Water Mains Inlet

15mm

DHW Flow

15mm

Pressure Relief Discharge

15mm

Condensate Drain

1” BSP

Recommended System
Temperature Drop

Condensing

20°C

Temperatures

C.H. Flow Temp

(adjustable)

55° C to 82° C

max

(± 0.5° C)

D.H.W. Flow Temp

(adjustable)

45° C to 55° C

max

(± 0.5° C)

dependent upon flow rate

Heat Input Gross DHW

Max

26.95

Btu/h

92,000

Heat Output CH

Non Condensing (70°C Mean Water temp)

Max

23.9

Btu/h

81,500

Condensing (40°C Mean Water temp)

Max

25.1

Btu/h

85,600

Electrical Supply

230V~ 50Hz

(Appliance must be connected to an

earthed supply)

Power Consumption

200W

External Fuse Rating

Internal Fuse Rating

3.15A

Appliance Category

CAT I

Max Gas Rate

(Natural Gas)
(After 10 Mins)

2.5

87.9

Inlet Pressure

(Natural Gas)

mbar

in wg

Appliance Type

NOx Class

DHW Expansion Vessel

See Section 6.6 for information

The efficiency is 90.8%

This value is used in the UK Government’s

Standard Assessment Procedure (SAP) for energy

rating of dwellings. The test data from which it has

been calculated has been certified by 0086.

SEDBUK Declaration For

Combi 80 HE Plus

Heat Input Gross CH

Max

26.95

Btu/h

92,000

CO/CO

Ratio

0.002

4.3

Combi 80 HE Plus

Electrical Protection

IPX2

Содержание Combi 100 HE Plus

Страница 1: ...us Baxi Combi 100 HE Plus Baxi Combi 80 HE Plus Gas Fired Wall Mounted Condensing Combination Boiler These instructions include the Benchmark Commissioning Checklist and should be left with the user for safe keeping Installation Servicing Instructions ...

Страница 2: ...tallation and commissioning of central heating systems in the UK and to encourage the regular servicing of all central heating systems to ensure safety and efficiency Building Regulations require that installations should comply with manufacturer s instructions It is therefore important that the commissioning checklist is completed by the installer The relevant section of Building Regulations only...

Страница 3: ...perty You must ensure that the notification number issued by CORGI is written onto the Benchmark Checklist Scheme Members only Call CORGI on 0870 88 88 777 or log onto www corgi notify com within 10 days If you notify via CORGI Scheme CORGI will then notify the relevant Local Authority Building Control Scheme on member s behalf Complete the Benchmark Checklist Install and Commission this appliance...

Страница 4: ...ng should be avoided and protective equipment worn where necessary Carrying lifting equipment should be used as required e g when installing in a loft space 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 ...

Страница 5: ...Fixings 12 6 0 System Details 13 7 0 Site Requirements 16 8 0 Installation 22 9 0 Electrical 29 10 0 Commissioning the Boiler 31 11 0 Fitting the Outer Case 35 12 0 Servicing the Boiler 36 13 0 Changing Components 38 14 0 Short Parts List 49 15 0 Fault Finding 50 16 0 Operational Flow Chart 60 Benchmark Checklist 62 Section Page Contents ...

Страница 6: ...ilers are intended to be installed in residential commercial light industrial E M C environments on a governed meter supply only 8 The boilers 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 ...

Страница 7: ...ART No FLUE EXTENSION KITS 110 70 Horizontal Flue Kit 4M max Flue Extension 0 25M 241692 Flue Extension 0 5M 241694 Flue Extension 1M Use two kits for 2M etc 241695 Flue Bend 45 Reduce overall length of flue by 0 5m when fitting this bend 241689 Flue Bend 90 Reduce overall length of flue by 1m when fitting this bend 241687 Horizontal Extended Flue 1 75M 5111457 VERTICAL FLUE KITS 110 70 5M max Ver...

Страница 8: ... Overrun 3 2 Domestic Hot Water Mode 1 Priority is given to the domestic hot water supply A demand at a tap or shower will override any central heating requirement 2 The flow of water will operate the DHW flow switch and the 3 way valve will change position This will allow the pump to circulate the primary water through the DHW plate heat exchanger 3 The burner will light automatically and the tem...

Страница 9: ...2 Connections compression Gas Supply 1 2 BSPF Central Heating Flow 22mm Central Heating Return 22mm Cold Water Mains Inlet 15mm DHW Flow 15mm Pressure Relief Discharge 15mm Condensate Drain 1 BSP Recommended System Temperature Drop Condensing 20 C Temperatures C H Flow Temp adjustable 55 C to 82 C max 0 5 C D H W Flow Temp adjustable 45 C to 55 C max 0 5 C dependent upon flow rate Heat Input Gross...

Страница 10: ...2 Connections compression Gas Supply 1 2 BSPF Central Heating Flow 22mm Central Heating Return 22mm Cold Water Mains Inlet 15mm DHW Flow 15mm Pressure Relief Discharge 15mm Condensate Drain 1 BSP Recommended System Temperature Drop Condensing 20 C Temperatures C H Flow Temp adjustable 55 C to 82 C max 0 5 C D H W Flow Temp adjustable 45 C to 55 C max 0 5 C dependent upon flow rate Heat Input Gross...

Страница 11: ...r Content of Boiler unpressurised 3 5 6 2 Connections compression Gas Supply 1 2 BSPF Central Heating Flow 22mm Central Heating Return 22mm Cold Water Mains Inlet 15mm DHW Flow 15mm Pressure Relief Discharge 15mm Condensate Drain 1 BSP Recommended System Temperature Drop Condensing 20 C Temperatures C H Flow Temp adjustable 55 C to 82 C max 0 5 C D H W Flow Temp adjustable 45 C to 55 C max 0 5 C d...

Страница 12: ...Tube Ø 110mm D C B A E F 3 1 in 20 DIMENSIONS A 850mm B 320mm C 490mm D 125mm Ø Min E 150mm F 136mm SIDE FLUE left and right For every 1m of horizontal flue length the clearance above the top of 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 disp...

Страница 13: ... If the system is fully TRV d with a bypass then this feature will not be available in this case the radiator temperature can be reduced to provide more efficient operation see User instructions The condensate drain and pipes must be free from leaks Information In GB it is necessary to comply with the Water Supply Water Fittings Regulations 1999 or for Scotland The Water Byelaws 2000 Scotland The ...

Страница 14: ...he diverter valve to the CH position by using the installer parameters see Section 10 4 6 4 Expansion Vessel CH only Fig 4 1 The appliance expansion vessel is pre charged to 1 bar 14 5 lb in2 Therefore the minimum cold fill pressure is 1 bar The vessel is suitable for correct operation for system capacities up to 125 litres 27 5gal For greater system capacities an additional expansion vessel must ...

Страница 15: ...onnected to the DHW system 5 Optimum hot water delivery of 16 l min 133 model 12 l min 100 model 10 l min 80 model may be obtained by fitting the flow regulator supplied 6 7 Showers 1 If a shower control is supplied from the appliance it should be of the thermostatic or pressure balanced type Thermostatic type shower valves provide the best comfort and guard against water at too high a temperature...

Страница 16: ...e boiler is fitted in a room containing a bath or shower the 100 HE Plus and 80 HE Plus can only be fitted in zone 3 the 133 HE Plus has a higher protection level and may be fitted in zone 2 Figs A B shows zone dimensions for a bathtub For other examples refer to Section 601 of the Current I E E Wiring Regulations reference must be made to the relevant requirements In GB this is the current I E E ...

Страница 17: ...at the pipework from the meter to the appliance is of adequate size Do not use pipes of a smaller diameter than 22mm up to the boiler 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 NOTE The m...

Страница 18: ...32mm waste pipe 8 If the boiler is fitted in an unheated location the entire condensate 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 ...

Страница 19: ...take This can be painted if required using a suitable external paint 9 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 10 Fig 9 300 min Terminal Assembly TopView Rear Flue Property Boundary Line NOTE The distance from a fanned draught appliance terminal installed parallel ...

Страница 20: ...m eg 45 0 5m 90 2 x 45 1m etc 7 9 Terminal Guard Fig 13 1 When codes of practice dictate the use of terminal guards they can be obtained from most Plumbers and Builders Merchants 2 There must be a clearance of at least 50mm between any part of the terminal and the guard 3 When ordering a terminal guard quote the appliance name and model number 4 The flue terminal guard should be positioned central...

Страница 21: ...oncentric 242886 Clamp 80mm 238684 7 10 Flue options Concentric The maximum equivalent lengths are 4m horizontal or 5m vertical There lengths exclude the standard elbow and flue terminal assembly horizontal and terminal assembly vertical Twin Flue The total maximum equivalent flue length is 40m NOTE Each 1m of flue duct should be calculated as 2m Any additional in line bends in the flue system mus...

Страница 22: ... hole should be flat 7 Drill and plug the wall as previously marked Secure the wallplate to the wall by the top centre hole 8 Ensuring the wallplate is level both horizontally and vertically drill and plug the remaining 4 securing positions at the top and bottom through the wallplate Utilising the slots available ensure the wallplate is square and secure to the wall 9 Connect the gas water and the...

Страница 23: ...ate and remove Fig 17 NOTE Service Guidance Note Label is fitted to the inside of the outercase Fig 17 4 Remove the sealing plugs from the copper bends 5 Remove cardboard transit packaging at the left hand rear of the boiler before lifting the boiler onto the support bracket 6 Stand the boiler on its base by using the rear lower edge as a pivot NOTE A small amount of water may drain from the boile...

Страница 24: ...ers are inserted between the valve outlet face and the flange on the copper pipes of the water circuit and pressure relief connections Fig 20 5 Tighten the connections in the sequence listed above 8 5 Condensate Drain see section 7 6 1 Connect the condensate drain using the 1 BSP nut and seal supplied Ensure the discharge of condensate complies with any national or local regulations in force see B...

Страница 25: ...oth tube ends 4 For left hand exit measure the distance from the edge of the support bracket to the inner face of the wall Fig 21 and to this dimension add the wall thickness 268mm This dimension to be known as Y i e Y support bracket to wall wall thickness 268mm 5 Take the flue and mark off Y from the terminal end as indicated Fig 22 6 For right hand exit measure the distance from the edge of the...

Страница 26: ...r screws supplied in the kit 13 Make good between the wall and air duct outside the building ensuring the 3 drop between the terminal and elbow 14 The flue trim should be fitted once the installation is complete and the flue secure Fig 26 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 15 If necessary fit a terminal...

Страница 27: ... 5 If fitting an integral timer please refer to the instructions supplied with the kit 6 Check the electrical installation for earth continuity short circuits resistance to earth correct polarity and fuse failure see Section 8 13 Electrical System Checks 8 8 Connecting an External Timer 1 Undo the screw securing the electrical cover and remove 133 HE Plus only Fig 27 2 To connect an external timer...

Страница 28: ...ould be dangerous to work with the appliance live 2 Short Circuit Check Isolate the control system set all switches and thermostats to calling for heat Set the meter on ohm s scale Test from L to N on control system terminal block if the resistance reads zero there is a short circuit 3 Resistance to Earth Check Isolate the control system set all switches and thermostats to calling for heat Set the...

Страница 29: ...Electrode Condensate Trap Diverter Valve Flow Overheat Thermostat Fan Overheat Thermostat g y b b br bk br r b r r b b Flow Thermistor Return Thermistor 325Vdc DC Fan CH Flow Switch DHW Flow Switch gy gy gy gy w g br PCB Earths not shown to aid clarity of diagram br g y g y g y r b br o Key To Wiring Colours b Blue bk Black gy Grey w White br Brown op Opaque r Red g Green g y Green Yellow o Orange...

Страница 30: ...stor Return Thermistor Spark Electrode Flame Detection Electrode Main PCB L N Filter Plug b r r b b gy gy gy gy r b br g w b br bk Flow Overheat Thermostat Fan Overheat Thermostat bk bk bk r bk w w op g y br b b br Layout of PCB Pins g y g y g y g y o Key To Wiring Colours b Blue bk Black gy Grey w White br Brown op Opaque r Red g Green g y Green Yellow o Orange y Yellow ...

Страница 31: ...ed for future reference 8 Pressurise the system to 1 5 bar then close and disconnect the filling loop 9 Turn the gas supply on and purge according to in GB BS 6891 and in IE IS 813 Domestic Gas Installations 10 Turn the gas service cock anticlockwise to the ON position and check for gas soundness up to the gas valve 11 Run the system and check the boiler for correct operation NOTE These boilers ar...

Страница 32: ...s and the most comfortable room temperature possible 2 If the CH system is greater than 80 000 Btu hr then to increase the maximum output of the boiler to 100 000 Btu hr proceed as follows a Isolate the mains supply to the boiler b Remove the outer case c Lower the hinge down facia box d Remove the PCB connection cover e At the extreme left hand side of the PCB there are two jumpers Remove the red...

Страница 33: ...and 8 00am on Monday During the first week of operation from power on no pre heating will occur 2 The pre heat switches the boiler on for approximately 1 minute every 40 minutes whenever it is required 3 The boiler is factory set with the pre heat feature on If the user wishes to disable this feature then proceed as follows a Isolate the mains supply to the boiler b Remove the outercase c Lower th...

Страница 34: ... heating position as follows a Ensure that no DHW taps are on b Turn power on to the boiler c Ensure that any external controls are calling for heat d After 10 seconds turn the boiler off at the isolation switch e The diverter valve will now be in the central heating position There is no need to reset the position of the diverter valve after filling ...

Страница 35: ...intelligent pre heat is on pre heating will not occur for the first week of operation 7 Set the User preferences See User Label on lower door panel Fig 38 or user s operating instructions set CH DHW temperatures 8 Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the appliance and installation These details will b...

Страница 36: ...ssembly is 325 Vdc Isolate at supply before access 6 Release the four 1 4 turn screws securing the air box door panel and remove the door Fig 40 7 Disconnect the three lead terminals from the combustion box door taking note of their positions Fig 40 8 Undo the four screws securing the combustion box door and remove the door Fig 41 9 Visually check for debris damage and clean or replace if necessar...

Страница 37: ...the four screws securing the heat exchanger combustion box base and withdraw the base j Lower the central insulation panels and check condition Fig 44 Replace the insulation pads if necessary k Ensure the heat exchanger fins are clear of any obstruction use a thin bladed tool to remove debris The use of a torch at the heat exchanger top and a mirror held under the heat exchanger will aid observati...

Страница 38: ...ircuit and drain the system as necessary There are 4 drain points a Flow Valve b Heat Exchanger Manifold Fig 45 c Return Valve d Cold Water Inlet NOTE When reassembling always fit new O rings ensuring their correct location on the spigot Green O rings are used for gas joints and Black O rings for water joints Use Greasil 4000 Approved Silicone Grease 3 After changing a component re commission the ...

Страница 39: ...4 Fit the new thermistor or safety thermostat and reassemble in reverse order 13 5 Expansion Vessel Fig 50 1 Drain the boiler see Section 13 1 paragraph 2 3 2 Loosen the securing screw at the base of the expansion vessel 3 Whilst supporting the vessel undo the expansion vessel connection and retain the sealing washer 4 Remove the expansion vessel 5 Fit the new expansion vessel and reassemble in re...

Страница 40: ...he pump 5 Fit the new pump and reassemble in reverse order 13 9 Pump Head Only Fig 54 1 Drain the boiler see Section 13 1 paragraph 2 3 2 Unplug the wiring harness from the pump 3 Remove the four socket head screws securing the pump head and separate it from the housing 4 Remove the screws retaining the pump electrical covers on the original and replacement heads 5 From the replacement UPS 15 60 p...

Страница 41: ...y Diverter Valve Complete Fig 56 1 Drain the boiler see Section 13 1 paragraph 2 3 2 Unplug the wiring harness from the 3 way diverter valve 3 Remove the four socket screws retaining the 3 way valve 4 Remove the 3 way valve 5 Fit the new 3 way valve ensuring the gasket is in place and that the spigots are at the top to fit into the recesses on the manifold and reassemble in reverse order Fig 55 Wi...

Страница 42: ...n reverse order 13 13 Pressure Relief Valve Fig 59 1 The pressure relief valve is positioned on the hydraulic manifold at the back of the pump 2 Drain the boiler see Section 13 1 paragraph 2 3 3 Disconnect the union between the valve and the discharge pipe 4 Slacken the screw retaining the valve 5 Pull the valve upwards to disengage it 6 Fit the new pressure relief valve and reassemble in reverse ...

Страница 43: ... 6 Refit the plate heat exchanger cover 13 15 DHW Flow Switch Fig 62 1 Drain the boiler see Section 13 1 paragraph 2 3 2 Remove the DHW plate heat exchanger see section 13 14 3 Disconnect the inline electrical connection 4 Remove the clip at right hand side of the flow switch 5 Undo the DHW inlet connection 6 Remove the flow switch assembly and undo the second clip 7 Fit the new flow switch and re...

Страница 44: ...ing screws 1 4 turn and hinge down the facia box 3 Remove the screws securing the PCB connection cover 4 Remove the screws securing the PCB and disconnect the electrical connections noting their positions although they are one way fitting NOTE Check the PCB for the presence of input jumpers see section 10 2 10 3 Set the new PCB as the original 5 Fit the new PCB and reassemble in reverse order Fig ...

Страница 45: ...connections to the fan protection thermostat on the fan 2 Replacing the thermostat Unscrew the thermostat and replace with the new thermostat Reassemble in reverse order 3 Replacing the fan Remove the wing nuts securing the fan to the base of the combustion box 4 Loosen the screw retaining the gas injector pipe at the venturi 100 80 HE Plus models 5 Lower the fan and disconnect the electrical supp...

Страница 46: ...s valve and inlet pipe from the airbox side 7 Remove the four screws securing the gas inlet pipe to the valve and refit to the new valve 8 Remove the aluminium spacer and its gasket and O ring from the gas valve 9 Fit the aluminium spacer O ring and its gasket to the new valve 10 Fit the new gas valve and reassemble in reverse order Test for gas soundness NOTE It is essential that you ensure gas s...

Страница 47: ...iler see section 13 1 paragraph 2 3 WARNING The PCB Control and Fan Assembly is 325 Vdc Isolate at supply before access 2 Remove the fan and condensate trap see section 13 21 and 13 24 3 Undo the screws securing the flow switch and return connections Remove the flow switch and return connection Fig 70 4 Undo the screws securing the heat exchanger manifold and remove the manifold Fig 71 5 Undo the ...

Страница 48: ... 4 Remove the combustion box base 5 Pull the central insulation panel down from the centre of the heat exchanger and remove the insulation pads 6 Check combustion box seal for damage replace if necessary 7 Fit the new insulation pads and reassemble in reverse order Fig 73 Central Insulation Panel Lower Insulation Panel Upper Insulation Panel Burner Combustion Box Base Support Bracket Burner Securi...

Страница 49: ...242459 E DHW Flow Switch Kit 247502 G PCB enclosure 5110991 I Pump 240395 K E58 935 Diverter Valve Head 243341 L Fan 133 HE 5109926 Fan 100 80 HE 5109925 M Condensate Trap Kit 5111714 N E78 749 Gas Valve Kit 247222 O E58 900 Burner 133 HE 245199 Burner 100 80 HE 5107430 P Electrode Kit 5110992 R Plate Heat Exch Kit 247224 S E06 085 Inspection Window Assy 242484 T E06 097 Heat Exchanger Assy 242497...

Страница 50: ...g instructions PCB Fault Replace PCB YES YES YES YES YES YES YES YES YES YES YES YES YES YES Before performing fault finding carry out preliminary electrical checks for earth continuity and polarity See Section 8 13 YES Go to Electrical Supply section of the fault finding instructions Low High ON Reset Low High Domestic Hot Water LED Light Green Burner ON LED Light Green Mains ON LED Light Green F...

Страница 51: ...nnect Mains to boiler 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 Off Off Off Off ON LED Lights ...

Страница 52: ...aulty Remove blockage YES YES NO NO NO NO YES YES YES NO YES Unplug 5 way PCB connector With water flowing out of a fully open DHW tap is there continuity at E DRY FIRE Replace PCB Disconnect primary flow switch inline connector with a tap open is there continuity across flow switch Remove flow switch from boiler Is there a physical blockage to the paddle within the flow switch Is there a blockage...

Страница 53: ...valve inlet Set spark gap to 3 5mm Is spark gap between 3 and 4mm NO YES NO YES Rectify wiring Is wiring from PCB to spark probe flame detection probe OK NO YES Replace gas valve NO YES Replace PCB Remove 5 way connector from gas valve Is there 240Vdc between F G during ignition Remove the larger of the two 6 way PCB connectors Is there continuity from F to I from G to H Lead from PCB to gas valve...

Страница 54: ...mber door 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 5kΩ 20kΩ Is combustion chamber door seal damaged or not in place Replace PCB YES OVERHEAT LOCKOUT Replace therm...

Страница 55: ...iewed from Wire Entry end P T Fan Connection PCB Connection Fan Connection PCB Connection DHW FLOW SWITCH Replace PCB Unplug 5 way connector from PCB With all DHW taps off is there continuity across W NO Is DHW flow switch blocked Unblock DHW flow switch NO Replace DHW flow switch YES YES Viewed from Wire Entry end W Off Flash Flash On ON LED Lights NOTE The fan is supplied with 325 Vdc Fan Fault ...

Страница 56: ...nplug 8 way PCB connector Is resistance at V between 0 5kΩ 20kΩ V Viewed from Wire Entry end RETURN THERMISTOR YES Wiring from PCB to return thermistor faulty YES Replace return thermistor Replace PCB NO NO U Viewed from Wire Entry end Off On Flash On ON LED Lights On On Flash On ON LED Lights Unplug return thermistor Is thermistor resistance between 0 5kΩ 20kΩ Plug in thermistor unplug 8 way PCB ...

Страница 57: ... tap is there continuity across DHW flow switch Is DHW flow switch blocked Replace DHW Flow Switch Unblock DHW Flow Switch Wiring from PCB to Flow Switch faulty Replace PCB YES NO Unplug 7 way PCB connector With DHW LED on is there 240V from B to C Replace PCB NO Wiring from PCB to Diverter Valve faulty YES Is there 240V from A to Z YES Unplug 7 way PCB connector With DHW LED on is there 240V from...

Страница 58: ...iring Is there 240V at F NO Check room stat room stat wiring OK Is there 240V at G NO Wiring from R S 2 to PCB faulty Is there 240V at H NO Diverter Valve faulty Unplug Diverter Valve Ensure all DHW taps are off so that DHW LED is off Is there 240V from I to J from K to J NO Wiring from PCB to Diverter Valve faulty Is there 240V from G to N from G to M PCB faulty YES YES YES YES YES NO I J K Diver...

Страница 59: ... If the hot water tap is turned off and the DHW temperature has been reached and there is a Central Heating demand then CH Burner On occurs If the hot water tap is turned off and the DHW temperature has been reached and there is no CH demand then Pump Overrun occurs If the hot water tap is turned off and the DHW temperature has been exceeded and there is no CH demand then Standby occurs 5 Pump Ove...

Страница 60: ... occurs 6 Burner On The diverter valve pump fan and gas valve are on while the spark generator are off Flow temperature is controlled by varying the fan speed and thereby the gas rate to achieve optimum operation If the flow temperature is greater than the set point or the timer is off or the room stat is off then Pump Overrun occurs If the TRVs all shut down then Anti cycle occurs 7 Pump Overrun ...

Страница 61: ...17 0 Notes 61 Baxi Heating UK Limited 2005 ...

Страница 62: ...CER HAS BEEN FITTED FOR THE DOMESTIC HOT WATER MODE MEASURE RECORD GAS RATE ft3 hr MAXIMUM BURNER OPERATING PRESSURE IF APPLICABLE mbar COLD WATER INLET TEMPERATURE C HOT WATER OUTLET TEMPERATURE C WATER FLOW RATE lts min FOR CONDENSING BOILERS ONLY CONFIRM THE FOLLOWING THE CONDENSATE DRAIN HAS BEEN INSTALLED IN ACCORDANCE WITH THE MANUFACTURER S INSTRUCTIONS YES FOR ALL INSTALLATIONS CONFIRM THE...

Страница 63: ...ANY NAME TEL No CORGI ID CARD SERIAL No COMMENTS SIGNATURE SERVICE 8 DATE ENGINEER NAME COMPANY NAME TEL No CORGI ID CARD SERIAL No COMMENTS SIGNATURE SERVICE 9 DATE ENGINEER NAME COMPANY NAME TEL No CORGI ID CARD SERIAL No COMMENTS SIGNATURE SERVICE 10 DATE ENGINEER NAME COMPANY NAME TEL No CORGI ID CARD SERIAL No COMMENTS SIGNATURE SERVICE INTERVAL RECORD It is recommended that your heating syst...

Страница 64: ...60 Technical Enquiries 08706 049 049 Website www baxi co uk e oe company 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 requ...

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