11.3 Preliminary burner checks.
Some burner operations can be checked at this stage. Checking now will mean that
less disassembly will be required if any problems are found.
A full check should still
be made, however, after final installation.
11.3.1
Lighting the fire.
If closed
,
open the isolating ‘T’ connector valve. Depress the control knob and rotate it
SLOWLY anticlockwise to the PILOT/IGN position. A ‘click’ will be heard as the
integral piezo operates. A spark should be seen between the electrode and pilot tip.
Turn the control knob clockwise to the OFF position. Repeat this operation until a
flame appears at the pilot. There may be a delay before the pilot lights due to air
being purged from the system. When a flame appears at the pilot keep the control
knob depressed and hold the pilot ignition position for five seconds. When the control
knob is released the pilot flame should remain lit.
If there are no sparks check that the electrode lead is connected to the electrode tag.
11.3.2
Operating the burner.
When the pilot burner is operating properly, gradually turn the control knob anti-
clockwise to ‘HIGH’ (Depress the knob slightly to get past the PILOT/IGN position).
The main burner should now light. Depress the control knob slightly to release from
the ‘HIGH’ position and turn back (clockwise) to ‘LOW’. While turning, the burner
flames should gradually become lower but remain alight. Depress the control knob
slightly to release from the ‘LOW’ position and turn back (clockwise) to the
PILOT/IGN 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.
11.4 Check 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.
Check the inlet pressure by fitting a pressure gauge
at the test point. The test point is on the inlet ‘T’
connector (See figure 25). 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.
Test around the sealing screw for gas soundness
with a suitable leak detection fluid.
Page 27
©
Baxi Heating U.K. Limited 2010.
Figure 25. Pressure test point
INSTALLER GUIDE
Summary of Contents for 756
Page 48: ...Baxi Heating U K Limited 2010...
