Supplied By www.heating spares.co Tel. 0161 620 6677
17
220459C
10 Servicing and Replacement of Parts
Servicing and replacement of parts must be carried out
by a competent person.
Before commencing a service or replacing parts isolate
the gas and electrical supplies.
Unless stated otherwise replacement of parts is in the
reverse order to removal.
10.1 Heating Body - Service
Remove controls cover by pulling it forward and off.
Remove outer casing by releasing screw at the bottom
and unhooking at the top.
Remove the inner case by releasing screws at top and
bottom, see diagram 10.1.
To remove the flue hood release the wing nuts and lift
off securing angle and flue hood.
Remove the combustion chamber front panel by undoing
the wing nut at the bottom front and the four screws
securing it to the combustion chamber sides.
Remove the two screws and washers securing the pilot
burner and shield to the main burner, see diagram 10.2.
Pull the pilot assembly forward enough to allow the
main burner to be freed from the injector. Raise the
burner up at the front, withdraw forward. Take care not
to damage the insulation and the pilot burner and
electrode assemblies.
Place a sheet of paper in the combustion chamber and
brush away any deposits.
Remove the paper and debris.
10.2 Main Burner
Follow the instructions generally as Section 10.1.
With the main burner removed brush or vacuum any
deposits away, ensure that the flame ports are clean.
Do not use a brush with metallic bristles.
10.3 Main Injector
Follow the instructions generally as Section 10.1.
With the main burner removed the injector can be
unscrewed and replaced as necessary using a new sealing
washer.
If cleaning do not use a wire or sharp instrument on the
hole.
When replacing the main burner ensure that it is pushed
fully home onto the injector and that the guides are
engaged on the injector manifold.
10.4 Pilot Burner and Injector
Follow the instructions generally as Section 10.1.
With the main case and controls cover etc., removed as
above pull off ignition lead from electrode.
Unscrew the tubing nut at the base of the pilot burner
releasing the pilot pipe. Remove the pilot injector by
unscrewing if from the pilot burner.
Release the wing nuts securing the flue hood, see
diagram 10.1.
Remove combustion chamber front panel as above.
Remove the two screws and washers securing the pilot
burner and pilot shield to the main burner, see
diagram 10.1.
Remove the pilot shield complete with the electrode.
PILOT ASSEMBLY
WING NUT (2)
Diagram 10.1
ACCESS for SERVICING
Casing not illustrated
for clarity
COMBUSTION
CHAMBER
FRONT
PANEL
SECURING
SCREW (4)
WING NUT
M3
SCREW
IGNITION
LEAD
(clear end)
MICA WINDOW
PILOT
INJECTOR
PILOT
TUBING
NUT
ADAPTOR
OLIVE
THERMOCOUPLE
THERMOCOUPLE
NUT
PILOT
SHIELD
SECURING
SCREWS
ELECTRODE
1049
SECURING ANGLE
HOOK
BOLT (2)
FLUE
HOOD
FRONT
PANEL
Diagram 10.2
0947
