33 0020008155A
Diagram 12.10
9184
Diagram 12.11
DRAIN POINT
DRAIN VALVE
GAS SERVICE
COCK
MOUNTING JIG
FIXING JIG
CENTRAL
HEATING
RETURN
FILTER
RETAINING
CLIP
HOUSING
Diagram 12.12
10063
SEAL
FRONT
CASING
PANEL
FLAT
AND
HOLE
INNER
CASING
PANEL
11533
12 Servicing
12.7 Central Heating Return Filter
Turn off the electrical supply to the boiler.
Refer to section12.8 and drain the heating circuit of the boiler.
Remove the filter retaining clip and clean filter or renew if
necessary, see diagram 12.10.
Refit the filter, ensuring the correct orientation. The flat and hole
in the filter positioned as shown in diagram 12.10. Secure with
retaining clip.
Open the heating flow and return isolating valves and refill, vent
and pressurise the heating circuit. See section 11.2.
Check for leaks.
12.8 Draining of Boiler Heating Circuit
Drain down the Heating Circuit only, by closing the heating flow
and return isolating valves on the wall mounting jig, see diagram
7.1.
Attach a length of hose to the drain point and open the drain
valve, see diagram 12.11.
After servicing or replacing parts, close the drain valve and
remove the hose. Open the heating flow and return isolating
valves and refill, vent and pressurise the heating circuit. See
section 11.2.
Check for leaks.
12.9 Inner Casing Panel Seal Check
Check the condition of the seal, replace as required.
To replace remove the old seal, thoroughly clean the casing
sufaces. Fit the new seal, it is supplied to the correct length, see
diagram 12.12.
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