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5.4 HEATING SYSTEM FLUSHING
CAUTION: Flush the heating installation thoroughly prior to installation.
The heating system should be flushed in accordance with BS7593 & BS5449 which will remove any debris or
contaminants detrimental to the operation and life of the boiler. Any cleanser or additives used should comply with
current standards and the manufacturer’s instructions carefully followed.
NOTE: IT IS IMPORTANT NOT TO USE THE BOILER PRESSURE RELIEF VALVE TO DRAIN OR FLUSH THE SYSTEM
AS TRAPPED DEBRIS WILL CAUSE INCORRECT OPERATION. A PURPOSE PROVIDED DRAIN POINT SHOULD BE
USED.
5.5 FILLING DOMESTIC HOT WATER
Open the mains water inlet valve underneath the boiler. Turn on all the hot water system taps and thoroughly flush
allowing water to flow until no air is present. This will automatically vent the integral hot water store of any air.
6 OPERATING THE BOILER
6.1 INITIAL SWITCHING ON
CAUTION: THE MAXIMUM HEAT OUTPUT MUST BE ADJUSTED BEFORE SWITCHING ON. THE
BOILER SHOULD NEVER BE SWITCHED ON WITH THE HEATING SYSTEM OR DHW TANK
EMPTY. DAMAGE COULD OCCUR.
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When the boiler is first connected it will perform a general
self-check and if a fault is detected it will be indicated on the
display.
Turn on the boiler with the on/off switch located at the back of
the boiler as shown.
Mains connection terminals remain live even if the on/off switch is
turned off.
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6.2 CONTROL PANEL DESCRIPTION
MODELS CMX15
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