described in section 8.
When any service or replacement of electrical components
which has required the breaking and re-making of electrical
connections has taken place, the following tests must be
repeated:
– earth continuity;
– short circuit;
– polarity;
– resistance to earth.
5.8 CLEANING THE C.H. WATER FILTER (fig. 18)
To clean the filter, close the delivery/return on/off taps, turn
off the power to the control panel, remove the casing and
empty the boiler using the drain provided (14 fig. 2) until the
hydrometer shows “zero”. Place a container for collection
underneath the filter, unscrew the cap and proceed to clean
the filter, removing impurities and limestone deposits. Check
the seal o-ring before reassembling the cap with the filter.
16
Fig. 18
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