34
Classic SE
FF
-
Installation & Servicing
SERVICING
64 GAS CONTROL VALVE REPLACEMENT
1.
Refer to Frame 56.
2.
Remove the burner and air box assembly. Refer to
Frame 51.
3.
Remove the fixing screws.
Swing the control box down into the servicing position.
4.
Disconnect the gas control valve electrical leads.
5.
Undo the gas cock union .
6.
Whilst supporting the gas control valve, remove the 2
screws retaining the manifold to the back panel.
7.
Remove the gas control / manifold assembly.
8.
Remove the 4 screws retaining the manifold to the gas
control valve, and fit the manifold to the new valve.
Ensure that the new control is fitted the correct way
round (an arrow engraved on back indicates the
direction of flow).
9.
Transfer the gas cock union to the new gas control
valve, using an approved jointing compound.
10.
Reassemble in reverse order.
11.
Check the operation of the boiler.
Note.
Refer also to Frame 75 of 'Exploded Views' for illustration of the procedure detailed below.
1.
Refer to Frame 56.
2.
Remove the burner and air box assembly. Refer to Frame 51.
3.
Remove the electrode retaining nut.
4.
Remove the pilot shield.
5.
Remove the ignition electrode and integral lead.
6.
Refit the new electrode and lead in reverse order.
Ensure that the pilot shield is replaced.
7.
Check the spark gap. Refer to Frame 61.
8.
Reassemble in reverse order.
9.
Check the operation of the boiler.
62 IGNITION ELECTRODE AND LEAD REPLACEMENT
1.
Refer to Frame 56.
2.
Remove the screw retaining the front
burner support strap to the combustion
chamber.
3.
Remove the M5 pozi screw, situated at the
left hand bottom rear of the burner. Pull
the burner downward to disengage the
retention tab and remove the burner.
4.
At this stage the main burner injector can
be removed, checked, cleaned or
replaced as required. Ensure that a new
copper sealing washer is used.
5.
Fit the new burner, ensuring that the
retention tab is correctly located in the air
box slot and reassemble in reverse order.
6.
Check the burner for cross-lighting and
flame stability.
63 MAIN BURNER AND MAIN BURNER INJECTOR REPLACEMENT
SER
VICING
200544-5.pmd
20/02/2008, 13:27
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