Checking The Inlet Pressure; Fitting The Firefront - Baxi 939 Installation And Owner's Manual

ignition' position. The main burner should extinguish but the pilot should remain alight.
Depress the control knob slightly and turn back (clockwise) to turn OFF.
This will extinguish the pilot.

7.1.3 Checking the inlet pressure.

The appliance is pre-set to give the correct heat input
at the inlet pressure shown in section 3 of this
manual. No adjustment is necessary.
1. Ensure that the fire is OFF. Check the inlet
pressure by fitting a pressure gauge at the test point.
The test point is on the inlet 'T' connector (See figure
13). Check the pressure with the appliance alight and
set at maximum output.
2. After checking, turn off the appliance. Remove the
pressure gauge and replace the test point sealing
screw.
3. Relight the appliance. Turn to the maximum output
position and test around the sealing screw for gas
soundness with a suitable leak detection fluid.
Before fitting the fascia ensure that the information on the back pages of the
owner guide have been completed.
8.1 For models NOT supplied with a firefront.
A slotted firefront with a minimum free area as shown in figure 14 must always be
used.
8.2 For models
SUPPLIED with a
firefront.
The firefront supplied
with this fire has been
tested and found to be
satisfactory for use with
this fire. The open area
may differ slightly from
that shown in figure 14.
Place the decorative
firefront on the hearth
and central to the
appliance.
© Baxi Heating U.K. Limited 2009.
INSTALLER GUIDE

8. FITTING THE FIREFRONT

Figure 14. Firefront minimum open area requirements
Figure 13. Pressure test point
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