27
fig. 36
GW 495/0
fig. 37
GW 407/0
5.6 Filling condensate trap
Remove the lower part of the conden-
sate trap (1, fig. 35) by unscrewing
and fill with water to about 10 mm
from the top. Refit in boiler.
5.7 Initial lighting
•
Check that the boiler combustion
chamber (5, fig. 36) is correctly
fitted.
•
Ensure the cold water shut-off valve
(13, fig. 37) is open by turning
anti-clockwise.
•
Open the gas service valve
(7, fig. 37)
•
Check that the CH service valves
(6 and 15, fig. 37) are open.
•
Check that all external heating
controls are calling for heat.
•
Switch on the electricity supply to
the boiler.
•
Set both the maximum hot water
temperature control (4, fig. 36) and
maximum radiator temperature
control (3, fig. 36) to `9'.
•
Turn the boiler on/off control
(1, fig. 36) to `on'.
•
Set the boiler central heating
control (2, fig. 36) to the `Heating
and Hot Water' position.
The boiler will now operate for central
heating. Allow the boiler to run for a
few minutes to clear any air remaining
in the primary circuit.
(If the boiler should fail to light the dia-
gnostic display - 8, fig. 36- will indi-
cate fault code F:21. This usually indi-
cates that the gas supply is turned off,
or is not purged of air. Check gas
supply, push red `Reset' button on
front of control panel - 10, fig. 36 -
and repeat lighting procedure).
•
Set the boiler central heating con-
trol to the `Hot Water only' posi-
tion. The boiler will now switch off.
•
FULLY open a hot water tap. The
boiler will now operate for hot
water.
At this point the maximum domestic
hot water flow rate can be adjusted if
required.
