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6.0 Commissioning the Appliance – Page 31
6.1 Commissioning the Appliance
1. Flush the whole system In accordance with BS
5793:1992 (see Section 3.1 Water Circulating Systems).
Check for water leaks.
2. Purge away air from the supply pipe at the gas service
cock. (BS 6891: 1988) (Fig. 79).
3. Ensure that the electrical supply is isolated.
4. Check the electrical supply for earth continuity, polarity,
short circuit and resistance to earth.
5. Turn the gas service cock anti-clockwise to the ON
position and check for gas soundness up to the gas valve.
6. Loosen the pressure test point screw on the right hand
side of the gas control valve (there is no need to
completely remove this screw to obtain a pressure
reading) and connect a pressure gauge.
7. Turn the boiler thermostat control knob fully anti-
clockwise to the OFF position marked 0 (Fig. 80).
8. Ensure that the electricity supply is turned ON and set
any external controls to the ON position.
9. Turn the boiler thermostat knob fully clockwise.
10. The fan will start running and after approximately 5
seconds, the ignition spark will commence. (NOTE: This
may increase up to 1 minute in extremely cold weather).
11. The sparking will continue until the pilot light is
established (Fig. 81) and then the main burner will light
from the pilot flame.
12. Check that both the main burner and the pilot are
alight by observing through the viewing window. The
indicator lights should also be illuminated.
13. Should this sequence not occur, then refer to the fault
finding section of these instructions.
NOTE: The pilot rate for this appliance is factory set,
sealed and therefore non adjustable.
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