Table of Contents
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WD53/0/1999
4.7
4.8
5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
6
6.1
6.2
7
7.0
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
8
Combustion Fine Tuning
Handing Over To The User
FAULT FINDING
Electrical Control Sequence
Fault Finding Flow Chart
Continuity Checking
Module Functional Flow Wiring Diagram
Full Electrical Wiring Diagram
Full Illustrated Wiring Diagram
Exploded Assembly Diagrams
SERVICING
Pre Service Checks
Recommended Routine Service
REPLACEMENT OF PARTS
General
Precautions
Access
Replacement Procedure
Electrical Components
Gas Orifice
Spark Ignition/Flame Detection Electrode
Burner Head & Burner
Heat Exchanger
Condensate Trap
Pressure Gauge
Sight Glass
HT Ignition Lead
Air Orifice
SPARE PARTS LISTINGS
The Keston 260 & 340 Condensing Boilers
Page : ii
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