
Supplied By www.heating spares.co Tel. 0161 620 6677
20
221100C
COMBUSTION PRODUCTS
DISCHARGE SAFETY DEVICE
5294
8 S e r v i c i n g a n d R e p l a c e m e n t o f P a r t s
8.3 Burner and Injectors
Disconnect the supply pipe unions at the injectors, the
front union connection and the pilot tube union
connection from the combustion products discharge
safety device, see diagram 8.1. Disconnect the ignition
lead from piezo unit on the gas tap, see diagram 8.5.
Disconnect the thermocouple at the base of the gas tap,
see diagram 8.5.
Unfasten the burner securing screws at each end and
remove taking care not to damage the thermocouple
capillary and ignition lead, see diagram 8.5.
Unscrew the injectors, inspect, clean or replace as
necessary. Do not clean with a wire or a sharp
instrument.
Remove injector box cover screw and plate, clean out
dust etc., see diagram 8.2.
Brush away any lint and dust from the burner, etc.
8.5 Combustion Products Discharge Safety
Device
Remove the burner refer to Section 8.3.
Check the condition of the electrode and thermocouple,
clean with a soft brush.
To replace slide the silicone cover off the electrode,
disconnect the ignition lead, remove the mounting
bracket securing screws and the combustion products
discharge safety device, see diagram 8.3.
Before replacing bend the new thermocouple capillary to
shape using the old one as a template, avoid making
sharp bends.
Make sure the spark gap is as in diagram 8.4.
Diagram 8.2
8.6 Ignition Lead
Remove burner as Section 8.3.
Slide the silicone cover of the electrode, disconnect the
and ignition lead at both ends. When fitting a
replacement the clear end is fitted to the electrode.
Diagram 8.4
5296
INJECTOR
BOX
SECURING
SCREW
INJECTORS
THERMOCOUPLE
SECURING
SCREW (2)
PILOT TUBE
UNION
CONNECTION
IGNITION LEAD
(CLEAR END)
Diagram 8.3
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ELECTRODE
SPARK GAP
3
EARTH
POST
- 0.5
+ 1
THERMOCOUPLE
EARTH
POST
TOP VIEW
ELECTRODE
C
L
SILICONE
COVER)