Ignition Electrode And Lead Replacement; Main Burner And Main Burner Injector Replacement - IDEAL Henrad WH 30 FF Installation And Servicing Manual

59 IGNITION ELECTRODE AND LEAD REPLACEMENT

1. Refer to Frame 54.
2. Remove the burner and air box assembly. Refer to Frame 49.
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 58.
8. Reassemble in reverse order.
9. Check operation of the boiler.

60 MAIN BURNER AND MAIN BURNER INJECTOR REPLACEMENT

1. Refer to Frame 54.
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
an approved jointing compound is used sparingly.
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.
61 GAS CONTROL VALVE REPLACEMENT
Note. Refer also to Frame 69 of 'Exploded Views' for
illustration of the procedure detailed below.
1. Refer to Frame 54.
2. Remove the burner and air box assembly. Refer to
Frame 49.
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.
Henrad WH -
FF
Installation
SERVICING
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. Re-assemble in reverse order.
11.Check the operation of the boiler.
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