Clarke 6920268 Operating & Maintenance Instructions - Page 9

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MAINTENANCE

Before carrying out any adjustment or maintenance, ensure the heater is

switched OFF, disconnected from the mains supply, and has been given

adequate time to cool down, unless otherwise stated.

It is essential that the heater is correctly maintained and kept in top condition at all

times.

Those items requiring regular maintenance comprise,

Intake Air Filter (Item 2)

Output Air Filter (Item 5)

Fan (Item 20)

Fuel Nozzle (Item 26)

Ignition Electrodes (Item 23)

Fuel Filter (Integral part of item 27)

The Intake and Output Air Filters, are accessible by removing the Grille (by

removing the single hex socket centre screw), whereas accessibility to the

remaining items requires the removal of the top cover (by removing the six screws

at the centre joint).

Monthly

Intake Air Filter

Pull off the Intake Air Filter, which lies directly behind the Grille, and wash in a light

detergent. Thoroughly dry before re-installing.

In dusty environments it may be necessary to carry out this procedure weekly.

Never allow the filter to get blocked..

Ignition Electrodes

Having removed the heaters'

top cover, remove the single

screw retaining the electrode

holder. Withdraw the holder,

clean and adjust the gap

between the electrodes, to

4mm.

When re-installing the electrode holder, there must be a gap of 9mm between the

electrodes and the nozzle (see fig. 4). If this adjustment needs to be re-set, it is

preferable to remove the burner head complete, by removing the securing

screws around its' edge, taking care not to damage the photocell. The electrodes

may then be adjusted to their correct clearance before replacing the Burner

Head.

(ref. Parts List)

IMPORTANT

Fig. 4