7.1 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.
7.1.1 Lighting the fire
If closed
,
open the isolating inlet ‘T’ connector. Depress the control knob and rotate it
anticlockwise to the pilot ignition 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 ten seconds. When the control knob is released the pilot flame
should remain lit.
7.1.2 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 ignition 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 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.
Check the inlet pressure by fitting a pressure gauge
at the test point. The test point is on the inlet ‘T’
connector (See figure 11). 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.
Page 18
INSTALLER GUIDE
©
Baxi Heating U.K. Limited 2006.
Figure 11. Pressure test point
