Baxi Potterton Performa 24 Eco HE G, H, K, I, J L

51

© Baxi Heating UK Ltd 2009

16.0 Fault Finding

Replace PCB

G

Check and correct if necessary

1. Ignition electrode and lead

2. Electrode connection

3. Spark gap and position

230V at Main PCB - M4

connector across terminals

37 & 38. Check wiring

YES

NO

Replace gas valve

electrical plug/igniter

assy

YES

H

YES

Check the burner setting pressure of the

gas valve

(see Section 11.2 of Commissioning)

1.

Replace gas valve

NO Replace PCB

2. Voltage at modulating coil of gas valve is:

Max. burner press.approx 9V DC (13V DC LPG)

Min. burner press.approx 1V DC

Current at modulating coil of gas valve is:

(Use an instrument with average function for this

measure)

30 ÷ 230 mA DC (45 ÷ 310 mA DC LPG)

Check and correct if necessary

1. Flame sensing electrode and lead connections

2. Electrode position

Flame current should be 1 μA approx.

Replace PCB

Replace PCB

YES

YES

Replace flame sensing electrode

NO

YES

Ensure that mains input terminal L

is Live (230V) and N is Neutral

(0V)

I

Check terminal 1 of ON/OFF/RESET selector is in connection

with PCB - M1 connector terminal 16

Check electrical continuity across terminals 1 & a of

ON/OFF/RESET selector when turned to ‘Reset’ position

Replace ON/OFF/RESET selector

NO

Replace PCB

YES

K

Replace boiler overheat

thermostat

YES

NO

Boiler overheat thermostat operated

or faulty, i.e. continuity across

thermostat terminals

Allow to cool. Continuity across

thermostat terminals more than

1.5 ohm

J

LPress the reset button on the flue overheat thermostat. If the

boiler does not relight or repeatedly cuts out check the operation

of the flue system or replace the flue overheat thermostat. If the

flue overheat thermostat has not been activated see section ‘D’

Fault Finding Solutions Sections G to L

Contents

Main 2 Natural Gas Building Regulations and the Benchmark Commissioning Checklist Contents ISO 9001 FM 00866 Installer Notification Guidelines Legislation Codes of Practice, most recent version should be used IMPORTANT - Installation, Commissioning, Service & Repair Safe Manual Handling 1.1 Description 1.2 Contents of Pack 1.0 Introduction 2.0 General Layout 2.1 Layout 3.0 Appliance Operation 3.1 Central Heating Mode (Fig. 2) 3.2 Domestic Hot Water Mode (Fig. 3) 4.0 Technical Data Pump - Available Head 5.0 Dimensions and Fixings Dimensions 6.1 Information 6.2 Central Heating Circuit 6.3 Bypass 1. The boiler is fitted with an automatic integral bypass. 6.4 System Control 12 6.5 System Filling and Pressurising 6.6 Expansion Vessel (Central Heating only) 6.7 Safety Pressure Relief Valve (Fig. 6) 6.8 Domestic Hot Water Circuit (Fig. 7) 6.9 Showers 6.10 Hard Water Areas 14 7.1 Location 7.2 Clearances (Figs. 8 & 9) 7.3 Ventilation of Compartments 7.4 Gas Supply 7.5 Electrical Supply 16 7.6 Condensate Drain Termination to an internal soil and vent pipe External termination via internal discharge branch e.g sink waste - downstream External termination to a drain or gully External termination to a purpose made soak-away Page 18 Horizontal Flues This bend is equivalent to 1 metre Total equivalent length (up to 3m) = A+B+C+2x90Bends B AC This bend is equivalent to 1 metre 8.1 Horizontal Flue Systems The total equivalent length for this example is = 6.5 metres. Y B A C 20 8.3 Flue Accessories 8.4 Flue Duct Adaptor 8.5 Air duct adaptor 22 8.6 For Roof Terminals 8.7 Flue Dimensions 8.8 Flue Trim 8.9 Terminal Guard (Fig. 14) 9.1 Plume Displacement Kit (Fig. 14b) 24 X Y 9.2 Determining Permissible Lengths 50mm 30mm 9.3 General Fitting Notes 26 9.3 General Fitting Notes (cont.) 30mm 70 10.1 Initial Preparation 10.2 Flushing 10.3 Preparing The Boiler 28 10.4 Fitting The Boiler 10.5 Fitting the Safety Pressure Relief Discharge Pipe (Fig. 33) 10.6 Condensate Drain (see section 7.6) 10.7 Fitting The Flue 30 10.7 Fitting the Flue (Cont) 10.8 Making The Electrical Connections 10.9 Preliminary Electrical Checks 11.0 Commissioning the Boiler 32 11.1 Commissioning the Boiler 11.0 Commissioning the Boiler 11.2 Checking the Burner Pressure 12.0 Completion 34 12.1 Completion 13.0 Servicing the Boiler 13 .1 Annual Servicing 13.0 Servicing the Boiler 36 13.1 Annual Servicing (Cont) 14.1 Fan (Figs. 62 & 63) 14.2 Pressure Switch (Fig. 61) 38 14.3 Heat Exchanger (Fig. 64) 14.4 Burner (Fig. 65) 14.5 Injectors (Fig. 66) 14.6 Electrodes (Fig. 66) 13.8 14.7 Insulation (Fig. 67) 40 14.8 Gas Valve (Fig. 68) 14.9 Temperature Sensor (Fig. 69) 14.10 Safety Thermostat (Fig. 69) 14.11 Pump - Head Only (Fig. 71) 14.12 Pump - Complete (Fig. 73) 14.13 Automatic Air Vent (Fig. 73) 42 14.14 Pressure Gauge (Figs. 74 & 75) 14.15 Expansion Vessel (Fig. 76) 14.16 Condensate Trap (Fig. 77) 14.17 Pressure Relief Valve (Fig. 78) 14.18 P.C.B. (Fig. 80) 14.19 Selector Switch (Fig. 80) 44 14.20 Plate Heat Exchanger (Fig. 67) 14.21 Diverter Valve Assembly (Figs. 82 & 83) 14.21 Diverter Valve Assembly (Cont) 14.22 Flow Regulator (Figs. 85 & 86) 46 14.23 Secondary Heat Exchanger (Fig. 87) 14.24 Flue Overheat Thermostat (Fig. 88) 15.0 Illustrated Wiring Diagram Control PCB br - brown bk - black b - blue r - red y - yellow g/y- green / yellow w - white gr - grey Page Page Fault Finding Solutions Sections A to F A B F D C G Fault Finding Solutions Sections G to L H K I A B E C D 18.0 Short Parts List GAS BOILER SYSTEM COMMISSIONING CHECKLIST CONTROLS ALL SYSTEMS CENTRAL HEATING MODE COMBINATION BOILERS ONLY SERVICE RECORD Service Provider SERVICE 1 SERVICE 3 SERVICE 5