User Instructions

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