The other firebox fixing method is as follows :-
In installations where the cable method is not suitable (e.g. loose masonary in rear
of fire opening) the firebox can be secured to the fire surround using four screws
and wall plugs (not provided). Below (Fig. 13) is a diagram to indicate the hole
centre positions available on the firebox to facilitate the screw fixing to the fire-
place / surround.
Fig. 13
2.3
GAS TIGHTNESS AND INLET PRESSURE (MANUAL CONTROL)
a)
Remove the pressure test point screw from the inlet elbow and fit a
manometer.
b)
Turn on the main gas supply and carry out a gas tightness test.
c)
Depress the control knob and turn anti-clockwise to the position marked
ignition / low. Hold in the control knob for a few seconds to purge the
pipe work then press the igniter button. The burner should light,
continue to hold the control knob for a few seconds then turn to the full-
on position.
d)
Check that the gas pressure is 20.0 mbar (+/- 1.0mbar) 8.0 in w.g.(+/-
0.4 in w.g.)
e)
Turn off the fire, remove the manometer and refit the pressure test point
screw. Check the pressure test point screw for gas tightness with the
appliance turned on using a suitable leak detection fluid or detector.
300mm
140mm
520mm
430mm
Firebox
Mounting
Flange
18