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31
220692C
31
SECTION
7
Completion and Commissioning
Testing - Electrical
Checks to ensure electrical safety should be carried
out by a competent person.
In the event of an electrical fault after installation of
the system, preliminary electrical system checks as
below should be carried out.
1. Test insulation resistance to earth of mains
cables.
2. Test the earth continuity and short circuit of all
cables.
3. Switch on the electrical supply to the boiler and
test the polarity of the mains supply.
Turn the boiler thermostat knob fully clockwise to
the maximum setting.
The lighting sequence is automatic, as follows:
The fan operates
The spark ignition operates
The pilot solenoid opens
The pilot burner lights
The ignition spark stops
The main solenoid opens -
and after a short period of time the main burner will
light, view through window.
The main burner will remain alight until switched
off, either by the boiler thermostat or a remote
system control.
(When the boiler switches “Off”, both the pilot and
main burner go out. The automatic lighting
sequence will operate again when heat is required).
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