Baxi Potterton Boiler Specifications

Combi 80 Installation & Service InstructionsAbout the Boiler See inside cover for models covered by these instructions.This is a wall mounted, fan

Installation Requirements - Page 10Safety Valve Setting (bar) 3.0Initial System Pressure (bar) 1.0 1.5Fig 6Total Water Content of System VESSEL VOLUME

Installation Requirements - Page 11• Frost ProtectionThe appliance is fitted with an internal frost thermostat,however this device is purely for the p

Installation Requirements - Page 12• InhibitorsWhen the heating system has been completed, it shouldbe cleaned thoroughly in accordance with BS 7593(c

2. Installation - Page 13• It is MOST IMPORTANT that the appliance is installedin a VERTICAL POSITION, with the flue system passingthrough the wall or

Installation - Page 143. Connect the cold water supply to the 15 mm isolatingcock.4. Connect the hot water outlet pipe using a 15 mmcompression fittin

Installation - Page 152.6 Wiring the ApplianceThe wiring diagram is located on the inside of the frontcasing panel.1. Undo the single retaining screw

3. Commissioning - Page 163.1 Electrical InstallationConduct a preliminary electrical test by checking: for shortcircuits, fuse failure, incorrect pol

Commissioning - Page 173.3 Initial LightingWARNING:Before operating the appliance, check that the air boxcovers are correctly fitted. The outer white

Commissioning - Page 1814. Fully open all domestic hot water outlets, vent flexiblehose connections to the washing machine anddishwasher. Remove air f

Commissioning - Page 193.6 D.H.W Flow RateThe appliance contains an automatic flow regulatorsupplying a nominal flow rate of 7.6 litres/minute. Thisfl

Contents - Page 2Introduction... 31. Installation Requirements...

Commissioning - Page 20• A Frost thermostat is fitted which will bring the applianceon when the local temperature around the appliancefalls below 5 °C

4. Servicing & Routine Maintenance - Page 21• To ensure the continued safe and efficient operation ofthe appliance it is recommended that it is ch

Servicing & Routine Maintenance - Page 224.1 Remove the White Front Case1. Remove the two securing screws located at the base ofthe white front ca

Servicing & Routine Maintenance - Page 23

Servicing & Routine Maintenance - Page 244.8 Remove the Burner - Fig. 151. Disconnect the two leads to the electrodes. (Do not pullon the cable).2

Servicing & Routine Maintenance - Page 25

5. Replacement of Parts - Page 26WARNING: Before attempting to remove any component from this appliance, first disconnect the mains electricity supply

Replacement of Parts - Page 275.1 Central Heating Overheat ThermostatFig. 171. Remove the white front case and three air box covers.See 4.1 & 4.3

Replacement of Parts - Page 285.7 Gas Valve - Fig. 181. Remove the white front case, base panel & white lefthand side panel.See 4.1, 4.2 & 4.3

Replacement of Parts - Page 29Fig 18

Introduction Page 3SAFETY, PERFORMANCE & QUALITYThis appliance has been assessed by a Governmentappointed Notified Body and shown to meet the &apo

Replacement of Parts - Page 30Fig 195.12 Central Heating and Boiler Switches1. Remove the white front case and base panel.See 4.1 & 4.2 in ‘Routin

Replacement of Parts - Page 315.14 Air Pressure Switch - Fig. 11 & 201. Remove the white front case, base panel and white righthand side panel. Se

Replacement of Parts - Page 325.19 Water Flow Switch (D.H.W.)1. Remove the white front case and base panel.See 4.1 & 4.2in ’Routine Maintenance’.2

Replacement of Parts - Page 335.22 Diverter Valve - Fig. 22The diverter valve is made up in two parts. The waxcapsule head forms one part and provides

Replacement of Parts - Page 345.23 Expansion Vessel C.H.In the unlikely event of a failure of the C.H. expansion vesselit is recommended that a new ve

Replacement of Parts - Page 355.24 Expansion Vessel D.H.W. - Fig. 23Isolate the electrical supply prior to this operation.1. Remove the white front ca

Replacement of Parts - Page 365.26 Automatic Air Vent - Fig. 241. Remove the white front case, base panel and white lefthand side panel. See 4.1, 4.2

Replacement of Parts - Page 375.28 Transformer Assembly - Fig. 261. Remove the white front case and base panel.See 4.1 & 4.2 in ’Routine Maintena

6. Fault Finding - Page 38Preliminary Actions: a. Set Boiler Switch to Standby. - b. Set Heating switch to ‘OFF’ (Centre) -c. Turn OFF all Hot Water T

7. Electrical Layouts - Page 39Control Flow Sequence

Introduction - Page 4Delivery• The boiler is delivered in two packages (1) the boiler and(2) the flue assembly.Health and Safety Information for the I

Functional Flow - Page 40

Electrical Diagram - Page 41

8. Product Specification - Page 42Heat Input: Max. 30.0 kW(102,350 Btu/h)Range Rate (C.H. Only) 22.5 kW(76,760 Btu/h)Min. 14.4 kW(49,130 Btu/h)Heat Ou

9. Optional Extras - Page 43

Optional Extras - Page 44

Optional Extras - Page 45

10. Short List of Spares - Page 46

Short List of Spares - Page 47Item Description Qty PottertonPart No.G.C.Part No.1 Modulation Control Board 1 929686 289 5512 Display Board 1 21/207613

1. Installation Requirements - Page 5General Information• Both the user and the manufacturer rely heavily on theinstaller, whose job it is to install

Installation Requirements - Page 6Fig 3

Installation Requirements - Page 71.3 Location Of Boiler• In siting the combination boiler, the following limitations,MUST be observed:a) The position

Installation Requirements - Page 8• 135° Off-set kits are available for both concentric andtwin tube.• A Pitched Roof Flashing kit and Flat Roof Flash

Installation Requirements - Page 91.6 Installation to an Existing Central HeatingSystem• The appliance is designed to operate on a sealedsystem only,