Baxi Combi 133 HE Plus Installation & Servicing Instructions Manual

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Summary of Contents:

[Page 1] Baxi Combi 133 HE Plus

© Baxi Heating UK Limited 2005 Baxi Combi 133 HE Plus 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...

[Page 2] Baxi Combi 133 HE Plus

2 © Baxi Heating UK Limited 2005 Natural Gas Baxi Combi 133 HE Plus G.C.N o 47 075 14 Baxi Combi 100 HE Plus G.C.N o 47 075 15 Baxi Combi 80 HE Plus G.C.N o 47 075 16 Baxi is a BS-EN ISO 9001 Accredited Company This product has an energy rati...

[Page 3] Baxi Combi 133 HE Plus

Installer Notification Guidelines 3 © Baxi Heating UK Limited 2005 Choose Building Regulations Notification Route Contact your relevant Local Authority Building Control (LABC) who will arrange an inspection or contact a government approved inspecto...

[Page 4] Baxi Combi 133 HE Plus

Legislation 4 © Baxi Heating UK Limited 2005 Baxi declare that no substances harmful to health are contained in the appliance or used during appliance manufacture. The appliance is suitable only for installation in GB and IE and should be installed ...

[Page 5] Baxi Combi 133 HE Plus

5 © Baxi Heating UK Limited 2005 1.0 Introduction 6 2.0 General Layout 7 3.0 Appliance Operation 8 4.0 Technical Data 9 5.0 Dimensions and Fixings 12 6.0 System Details 13 7.0 Site Requirements 16 8.0 Installation 22 9.0 Electrical 29 10.0 Commissio...

[Page 6] Baxi Combi 133 HE Plus

This boiler is fitted with a flow switch interlock that prevents it from firing when the heating demand is satisfied. 1.1 Description 1. The Baxi Combi HE Plus Range are fully automatic gas fired wall mounted condensing combination boilers. They are ...

[Page 7] Baxi Combi 133 HE Plus

2.0 General Layout 7 © Baxi Heating UK Limited 2005 2.1 Layout 1. Wallplate 2. Flue Elbow 3. Air Box 4. Heat Exchanger 5. Burner 6. Fan Protection Thermostat 7. Fan Assembly 8. DHW Plate Heat Exchanger 9. Three Way Valve 10. Facia Box 11. Water Pres...

[Page 8] Baxi Combi 133 HE Plus

3.0 Appliance Operation 8 © Baxi Heating UK Limited 2005 NOTE: All delay timers mentioned in 3.1 and 3.2 are overridden by domestic hot water demand. 3.1 Central Heating Mode 1. With a demand for heating, the pump circulates water through the primar...

[Page 9] Baxi Combi 133 HE Plus

4.0 Technical Data 9 © Baxi Heating UK Limited 2005 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 ...

[Page 10] Baxi Combi 133 HE Plus

4.0 Technical Data 10 © Baxi Heating UK Limited 2005 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...

[Page 11] Baxi Combi 133 HE Plus

4.0 Technical Data 11 © Baxi Heating UK Limited 2005 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...

[Page 12] Baxi Combi 133 HE Plus

5.0 Dimensions and Fixings 12 © Baxi Heating UK Limited 2005 Key To Support Bracket 1 Domestic Hot Water Outlet 4 Central Heating Flow 2 Cold Water Inlet 5 Central Heating Return 3 Gas Supply 6 Pressure Relief Support Bracket 1 2 3 4 5 63 mm 62 mm 7...

[Page 13] Baxi Combi 133 HE Plus

6.0 System Details 13 © Baxi Heating UK Limited 2005 6.1 Central Heating Circuit 1. The appliance is suitable for fully pumped SEALED SYSTEMS ONLY. This boiler is fitted with a flow switch interlock that prevents it from firing when the heating dem...

[Page 14] Baxi Combi 133 HE Plus

6.0 System Details 14 © Baxi Heating UK Limited 2005 6.2 System Control 1. The boiler is designed for use in a heating system that incorporates external controls, i.e. a minimum of a timer device. 2. Suitable timer kits are available as optional ex...

[Page 15] Baxi Combi 133 HE Plus

6.0 System Details 15 © Baxi Heating UK Limited 2005 6.6 Domestic Hot Water Circuit 1. All DHW circuits, connections, fittings, etc. should be fully in accordance with relevant standards and water supply regulations. 2.When installed in accordance w...

[Page 16] Baxi Combi 133 HE Plus

7.0 Site Requirements 16 © Baxi Heating UK Limited 2005 Zone 2 Zone 1 Zone 0 Zone 2 Zone 3 Zone 3 Zone 2 Window Recess Window Recess 0.6 m 2.4 m Ceiling Outside Zones Outside Zones Zone 3 Zone 3 Zone 2 Zone 2 Zone 1 Zone 0 2.25 m Zone 2 Window Reces...

[Page 17] Baxi Combi 133 HE Plus

7.0 Site Requirements 17 © Baxi Heating UK Limited 2005 7.3 Clearances (Fig. 6 & 7) 1. A flat vertical area is required for the installation of the boiler. 2. These dimensions include the necessary clearances around the boiler for case removal, ...

[Page 18] Baxi Combi 133 HE Plus

7.0 Site Requirements 18 © Baxi Heating UK Limited 2005 7.6 Condensate Drain FAILURE TO INSTALL THE CONDENSATE DISCHARGE PIPEWORK CORRECTLY WILL AFFECT THE RELIABLE OPERATION OF THE BOILER The condensate discharge pipe MUST NOT RISE at any point alo...

[Page 19] Baxi Combi 133 HE Plus

7.0 Site Requirements 19 © Baxi Heating UK Limited 2005 7.7 Flue NOTE: Due to the high efficiency of the boiler a plume of water vapour will be discharged from the flue. This should be taken into account when siting the flue terminal. 1. The followi...

[Page 20] Baxi Combi 133 HE Plus

7.0 Site Requirements 20 © Baxi Heating UK Limited 2005 7.8 Flue Dimensions See Section 2.2. The standard horizontal flue kit allows for flue lengths between 270mm and 800mm from elbow to terminal (Fig. 11). The maximum permissible equivalent flue l...

[Page 21] Baxi Combi 133 HE Plus

7.0 Site Requirement 21 © Baxi Heating UK Limited 2005 Key Accessory Size Baxi Code Number Concentric Flue System 110mm diameter A Horizontal flue kit 850mm 236921 B Straight extension kit 1000mm 241695 500mm 241694 250mm 241692 C Bend kit 93° 2416...

[Page 22] Baxi Combi 133 HE Plus

8.0 Installation 22 © Baxi Heating UK Limited 2005 8.1 Initial Preparation Check Site Requirements (section 7.0) before commencing. The gas supply, gas type and pressure must be checked for suitability before connection (see Section 7.4). NOTE: If t...

[Page 23] Baxi Combi 133 HE Plus

8.0 Installation 23 © Baxi Heating UK Limited 2005 Fig. 16 Fig. 17 Outer Case Fixing Screw Lower Door Panel Service Guidance Note Label on inside of panel 8.3 Preparing The Boiler 1. Remove the outer carton. 2. Hinge up the lower door panel (Fig. 16...

[Page 24] Baxi Combi 133 HE Plus

8.0 Installation 24 © Baxi Heating UK Limited 2005 8.4 Fitting The Boiler (Fig. 18) 1. Remove the tape from the tap rail on the support bracket. 2. Lift the boiler over the support bracket using the lifting points shown in Fig. 18 and engage onto t...

[Page 25] Baxi Combi 133 HE Plus

8.0 Installation 25 © Baxi Heating UK Limited 2005 8.6 Fitting The Flue Before fitting the flue, check the condensate drain integrity (see section 8.5). IMPORTANT: The flue should always be installed with a 3° (1 in 20) fall from terminal to elbow,...

[Page 26] Baxi Combi 133 HE Plus

8.0 Installation 26 © Baxi Heating UK Limited 2005 8.6 Fitting the Flue (Cont) 8. Ensure the inner flue support bracket is positioned in the flue (Fig. 24). 9. Engage the flue into the flue elbow using soap solution to ease the engagement ensuring t...

[Page 27] Baxi Combi 133 HE Plus

8.0 Installation 27 © Baxi Heating UK Limited 2005 8.7 Making The Electrical Connections (Fig. 26a) WARNING: This appliance must be earthed. 1. The electrical connection is on the rear left hand side of the unit. 2. Remove the electrical plug and le...

[Page 28] Baxi Combi 133 HE Plus

8.0 Installation 28 © Baxi Heating UK Limited 2005 8.9 Fitting a Room Thermostat 1. To fit a 2-wire thermostat, remove link and wire the thermostat switch between positions 1 & 2 (Figs. 30a). A cable clamp is provided for incoming cables. 8.10 F...

[Page 29] Baxi Combi 133 HE Plus

9.0 Electrical 29 © Baxi Heating UK Limited 2005 9.1 Schematic Wiring Diagram Mains Input NL NL Pump Gas Valve r g/y op Spark Electrode External Controls Connection b Filter bk bk bk bk r w w Flame Detection Electrode Condensate Tr a p Diverter V...

[Page 30] Baxi Combi 133 HE Plus

9.0 Electrical 30 © Baxi Heating UK Limited 2005 9.2 Illustrated Wiring Diagram br Pump Diverter Valve Gas Valve Fan Condensate Trap DHW Flow Switch CH Flow Switch Flow Thermistor Return Thermistor Spark Electrode Flame Detection Electrode Main PCB...

[Page 31] Baxi Combi 133 HE Plus

10.0 Commissioning the Boiler 31 © Baxi Heating UK Limited 2005 10.1 Commissioning the Boiler NOTE: The information shown on the display is explained on the label on the inside of the lower door panel (see Fig. 38). 1. Open the cold feed to the boil...

[Page 32] Baxi Combi 133 HE Plus

10.0 Commissioning the Boiler 32 © Baxi Heating UK Limited 2005 10.2 Increasing Central Heating Output To 100,000 Btu/hr (Fig. 35) (Combi 133 & 100 HE Plus only) 1. The boiler is factory set for a maximum output of 80,000 Btu/hr. The boiler wi...

[Page 33] Baxi Combi 133 HE Plus

10.0 Commissioning the Boiler 33 © Baxi Heating UK Limited 2005 10.3 Switching Off The Intelligent Pre-heat (Fig. 36) 1. The boiler includes an intelligent pre-heat feature. This feature ensures that the domestic hot water to the tap is pre-heated ...

[Page 34] Baxi Combi 133 HE Plus

10.0 Commissioning the Boiler 34 © Baxi Heating UK Limited 2005 10.4 Filling the System 1. When filling the system move the diverter valve to the central heating position as follows; a) Ensure that no DHW taps are on. b) Turn power on to the boiler....

[Page 35] Baxi Combi 133 HE Plus

11.0 Fitting the Outer Case 35 © Baxi Heating UK Limited 2005 11.1 Fitting The Outer Case 1. Fit the outercase to the appliance ensuring that the four slots in the side flanges align with the hooks on the chassis (Fig. 38). 2. Insert the two fixing ...

[Page 36] Baxi Combi 133 HE Plus

12.0 Servicing the Boiler 36 © Baxi Heating UK Limited 2005 12.1 Annual Servicing IMPORTANT: When servicing ensure that both the gas and electrical supplies to the boiler are isolated before any work is started. “The boiler cannot be switched off...

[Page 37] Baxi Combi 133 HE Plus

12.0 Servicing the Boiler 37 © Baxi Heating UK Limited 2005 12.1 Annual Servicing (Cont) NOTE: The information shown on the display is explained on the label on the inside of the lower door panel (see Fig. 38). 11. To clean the heat exchanger and bu...

[Page 38] Baxi Combi 133 HE Plus

13.0 Changing Components 38 © Baxi Heating UK Limited 2005 13.1 Changing Components IMPORTANT: When servicing ensure that both the gas and electrical supplies to the boiler are isolated before any work is started. “The boiler cannot be switched o...

[Page 39] Baxi Combi 133 HE Plus

13.0 Changing Components 39 © Baxi Heating UK Limited 2005 13.3 Flowswitch (Fig. 47) 1. Drain the boiler (see Section 13.1 paragraph 2 & 3). 2. It may be necessary to remove the expansion vessel (see Section 13.5). 3. Remove the clip securing th...

[Page 40] Baxi Combi 133 HE Plus

13.0 Changing Components 40 © Baxi Heating UK Limited 2005 The pump, 3-way diverter valve, pressure gauge, pressure relief valve, plate heat exchanger and DHW flow switch can be accessed after hinging down the facia box. 1. Release the facia securi...

[Page 41] Baxi Combi 133 HE Plus

13.0 Changing Components 41 © Baxi Heating UK Limited 2005 13.10 Three-Way Diverter Valve (Head Only) (Fig. 55) If only the head needs replacing: 1. Unplug the wiring harness from the 3-way diverter valve. 2.Depress the clip and revolve the head th...

[Page 42] Baxi Combi 133 HE Plus

13.0 Changing Components 42 © Baxi Heating UK Limited 2005 13.12 Pressure Gauge (Fig. 57) 1. Drain the boiler (see Section 13.1 paragraph 2 & 3). 2. Undo the nut retaining the capillary in the connection at the return pipe (Fig. 58). 3. Depress ...

[Page 43] Baxi Combi 133 HE Plus

13.0 Changing Components 43 © Baxi Heating UK Limited 2005 13.14 DHW Plate Heat Exchanger 1. Drain the boiler (see Section 13.1 paragraph 2 & 3). 2. Remove the four screws securing the plate heat exchanger to the manifolds (Fig. 60). NOTE: Ensur...

[Page 44] Baxi Combi 133 HE Plus

13.0 Changing Components 44 © Baxi Heating UK Limited 2005 13.16 PCB (Fig. 63) WARNING: The PCB Control and Fan Assembly is 325 Vdc. Isolate at supply before access. 1. Pull the control knobs off their spindles and remove the plastic button covers. ...

[Page 45] Baxi Combi 133 HE Plus

13.0 Changing Components 45 © Baxi Heating UK Limited 2005 The fan and venturi, gas valve, injector pipe, condensate trap, fan protection thermostat, spark and sensing electrode can be accessed and changed on the removal of the airbox door panel. 1....

[Page 46] Baxi Combi 133 HE Plus

13.0 Changing Components 46 © Baxi Heating UK Limited 2005 It is necessary to remove the fan before changing the injector pipe, condensate trap and gas valve (see section 13. 21). 13.22 Injector Pipe (Fig. 67) 1. Loosen the screw retaining the gas i...

[Page 47] Baxi Combi 133 HE Plus

13.0 Changing Components 47 © Baxi Heating UK Limited 2005 The burner and heat exchanger can be changed after removal of the combustion box door. To change the heat exchanger, the fan and burner must be removed first (see section 13. 21 & 13. 25...

[Page 48] Baxi Combi 133 HE Plus

13.0 Changing Components 48 © Baxi Heating UK Limited 2005 13.27 Heat Exchanger Insulation Pads (Fig. 73) 1. Remove the fan and condensate trap (see section 13.21 and 13.24). 2. Remove the burner (see section 13. 25). 3. Remove the four bolts securi...

[Page 49] Baxi Combi 133 HE Plus

14.0 Short Parts List 49 © Baxi Heating UK Limited 2005 Short Parts List Key G.C. Description Manufacturers No. No. Part No. A E58 933 Flow Thermistor (Red) / Return Thermistor 240670 C E58 912 Safety Thermostat (Black) / Fan Protection 24223...

[Page 50] Baxi Combi 133 HE Plus

15.0 Fault Finding 50 © Baxi Heating UK Limited 2005 Low Electrical Supply Incoming Voltage less than 180V. Check System Controls & System Wiring. Otherwise contact Electricity Provider. Live & Neutral Reversed Incoming Live and Neutral reve...

[Page 51] Baxi Combi 133 HE Plus

15.0 Fault Finding 51 © Baxi Heating UK Limited 2005 Connect 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 N...

[Page 52] Baxi Combi 133 HE Plus

15.0 Fault Finding 52 © Baxi Heating UK Limited 2005 Is the system full of water ? Fill system with water and bleed out all air. YES NO With water flowing out of a fully open DHW tap does the pump run ? Unplug the pump is there 240V at C ? Is the...

[Page 53] Baxi Combi 133 HE Plus

15.0 Fault Finding 53 © Baxi Heating UK Limited 2005 Check isolation valve and gas supply. Remove gas valve & check inlet filter for blockage. Otherwise incorrect gas supply to boiler. YES NO Ignition Lockout YES YES NO NO Is there gas at gas va...

[Page 54] Baxi Combi 133 HE Plus

15.0 Fault Finding 54 © Baxi Heating UK Limited 2005 Replace Stat. Replace Stat. Wiring from PCB to thermostats faulty. YES NO YES NO NO Disconnect black stat on flow pipe. When flow < 60° C is there continuity across stat ? Replace combustion c...

[Page 55] Baxi Combi 133 HE Plus

15.0 Fault Finding 55 © Baxi Heating UK Limited 2005 Rectify wiring. NO YES Unplug 3-way PCB connector & unplug fan. Is there continuity from K to L & from M to N ? NO Unplug the smaller of the 6-way PCB connectors. Is there continuity fro...

[Page 56] Baxi Combi 133 HE Plus

15.0 Fault Finding 56 © Baxi Heating UK Limited 2005 Replace flow thermistor. Wiring from PCB to flow thermistor faulty. YES NO NO YES Replace PCB. FLOW THERMISTOR Unplug flow thermistor, Is thermistor resistance between 0.5kΩ & 20kΩ ? Plug i...

[Page 57] Baxi Combi 133 HE Plus

15.0 Fault Finding 57 © Baxi Heating UK Limited 2005 NO YES With water flowing out of a fully open DHW tap, does the DHW LED light ? Unplug diverter valve. With DHW LED on, is there 240V from Y to Z ? NO DHW Fault Unplug 5-way connector from PCB...

[Page 58] Baxi Combi 133 HE Plus

15.0 Fault Finding 58 © Baxi Heating UK Limited 2005 Wiring in 8-way terminal block from L to Prog 1 faulty. Is there 240V at D ? NO YES CH Fault Check integral timer and wiring. Check Link Plug if no timer fitted. Is there 240V at E ? NO Check ext...

[Page 59] Baxi Combi 133 HE Plus

16.0 Operational Flow Chart 59 © Baxi Heating UK Limited 2005 16.1 Domestic Hot Water Mode 1. Standby: The diverter valve, pump, fan, spark generator and gas valve are off. If a tap or shower is switched on then Fan Pre-Purge occurs. 2. Fan Pre-Purg...

[Page 60] Baxi Combi 133 HE Plus

16.0 Operational Flow Chart 60 © Baxi Heating UK Limited 2005 16.2 Central Heating Mode 1. Standby: The diverter valve, pump, fan, spark generator and gas valve are off. If the timer and room stat are on then Diverter Valve moving to CH position occ...

[Page 61] Baxi Combi 133 HE Plus

17.0 Notes 61 © Baxi Heating UK Limited 2005 ...

[Page 62] Baxi Combi 133 HE Plus

CONTROLS To comply with the Building Regulations, each section must have a tick in one or other of the boxes TIME & TEMPERATURE CONTROL TO HEATING ROOM T/STAT & PROGRAMMER/TIMER PROGRAMMABLE ROOMSTAT TIME & TEMPERATURE CONTROL TO HOT WATE...

[Page 63] Baxi Combi 133 HE Plus

SERVICE 1 DATE ENGINEER NAME COMPANY NAME TEL No. CORGI ID CARD SERIAL No. COMMENTS SIGNATURE SERVICE 2 DATE ENGINEER NAME COMPANY NAME TEL No. CORGI ID CARD SERIAL No. COMMENTS SIGNATURE SERVICE 3 DATE ENGINEER NAME COMPANY NAME TEL No. CORGI ID CAR...

[Page 64] Baxi Combi 133 HE Plus

© Baxi Heating UK Limited 2005 Comp N o 5109929 - Iss 6 - 10/07 BAXI A Trading Division of Baxi Heating UK, a division of Baxi Group Brooks House, Coventry Road, Warwick. CV34 4LL After Sales Service 08700 60 30 60 Technical Enquiries 08706 049 049 ...