Baxi Potterton BBU 15 HE manual Annual Servicing Inspection

Page 28

PCB Control Box

Securing Screw

PCB Control

Box

Boiler Front

Panel

Spark

Generator

Electrode

Assembly

Injector

Gas Feed

Pipe

Fan

Fig. 44

Reset Switch

Off Position

Fig. 43

Sensing Pipe

Gas Valve

Discharge Pipe

Locking Clip

Condensate Pump

9.0 Annual Servicing

9.2Annual Servicing - Inspection

1.Ensure that the boiler is cool.

2.Ensure that the gas supply to the boiler is isolated.

3.Operate the Reset switch (Fig. 41) to activate the condensate pump and then repeat. This will empty most of the condensate from the sump.9. Isolate the boiler from the electrical supply.

4.Undo &remove the flue sampling plug and washer. Remove the screws retaining the boiler front panel, and lift the panel away (Fig. 43).

5.Remove the screw securing the PCB control box and swing the box to the right (Fig. 43).

6.Disconnect the two plugs from the fan motor and remove the sensing pipe from between the gas valve and fan outlet.

7.Remove the gas feed pipe and washers, and extract the injector from the gas/air inlet manifold.

8.For ease of access disconnect the following:-

a)2 pin plug on NTClead

b)all wires from electrode assembly

c)all wires from spark generator

d)both wires from the overheat thermostat

e)the red and black wires connected together

9.Undo the two securing nuts and remove the spark generator and bracket.

10.Undo the combustion panel securing nuts and remove the special spring washers. Remove the complete fan & panel assembly from the boiler.

11.Lay the assembly to one side. The outer insulation panel is fitted to the rear of the combustion box panel.

12.Clean inside the heat exchanger and examine the condition of the fins.

13.Examine the burner, electrodes, insulation and seal, replacing if necessary. Also check the condition of the three insulation pieces in the rear of the heat exchanger.

14.Disconnect the wires on the condensate pump motor and pull off the plastic discharge pipe. Cut and remove the transit cable tie. It is not necessary to replace this item.

15.Squeeze the two retaining clips and turn the pump anticlockwise to remove it. Draw it upwards from the sump.

16.Clean any debris from the sump and examine the condition of the pump seal, replacing if necessary.

17.Reassemble in reverse order of dismantling, checking and replacing any components as necessary. Recommission the boiler and complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication.

28© Baxi Heating UK Ltd 2009

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Contents
Baxi Bermuda BBU 15 HE 0086 Installer Notification Guidelines Scheme Members onlyLegislation Important Installation, Commissioning, Service & RepairCodes of Practice, most recent version should be used Safe Manual Handling Contents Introduction ContentsDescription General Layout Layout FigFlue Kit 10m & 12.5m a Technical Data Bermuda HE Cbbu 15 HESystem Details Water Circulating SystemsTreatment of Water Circulating Systems There is a drain cock supplied in the plumbing kitSystem Controls PipeworkStorage Systems Sealed Systems Figs , 7 Sealed Systems Site Requirements Builders Opening FigLocation Fireplace Opening & SurroundFlue No Horizontal Runs are PermittedVentilation Gas Supply FigElectrical Supply Fig Electrical Connection Gas ConnectionCondensate Drain General Condensate Disposal FigTotal volume of the sump is 1.5 litres Condensate DisposalCondensate Pump Operation From Boiler 500mm MinBoiler Internal Wiring Boiler Internal Illustrated Wiring DiagramInitial Preparation InstallationFlue System Barb ‘C’ Clip Air Cowl Air Duct Collar Ribs Terminal Cap Siting the Boiler Water ConnectionsGas Connection Electrical ConnectionCompletion Completion & CommissioningCommissioning the Boiler Test Point Annual Servicing Annual ServicingAnnual Servicing Inspection Electrode Assembly Fig Changing ComponentsChanging Components Spark Generator FigFan Fig Burner FigSpark Generator Plug Electrode Fan Injector Burner Spark Generator Plug Gas Feed Pipe InjectorInjector Gas Valve Earth Wire Gas Valve FigSafety Thermostat Fig Float Switches FigPCB Fig NTC FigSetting the Gas Valve CO2 check Setting the Gas ValveFlue Sampling Point Display Control Knobs Initial Fault Finding Checks Fault FindingError Codes Error 110 flashing Burner lights Press the Service ResetSwitch for 5 seconds Go to section ‘A’Clean condensate drain system X2 connector, is 230V AC acrossTerminals 1 Voltage at PCB X2 connector is Spark gap and position Check wiringReplace Safety Thermostat Replace flame sensing electrode13.0 Short Parts List Short Parts ListPage Page Page GAS Boiler System Commissioning Checklist Service Record Date Energy Efficiency Checklist completed?Warranty & Service Serial Number Date of InstallationInstaller Details name, address and contact numbers After Sales Service 0844 871