9 FAULT FINDING CENTRAL HEATING
Before trying to operate the boiler make sure that: all gas supply cocks are open and the gas supply has been
purged of air. The heating system pressure is at least 1 bar min to 1.5 bar max, select winter position on the
digital display and set the central heating temperature to maximum. (sect. 1.5).
Ensure external controls are calling for heat (room thermostat/ digital clock) and check the following appliance
operations:
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