INSTALLER’S GUIDE
Page 13
Fig. 12 Pressure test point
6.1.4
Pressure check the installation pipework for gas soundness. In the United
Kingdom check in accordance with the current edition of BS6891. In the Republic of
Ireland check in accordance with the rules in force.
6.2
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.
6.2.1
If closed
,
open the isolating valve at the inlet elbow.
6.2.2
Depress the slider knob as far as it will go and hold in this position (see section
3.2.2 and figure 5). This should close the ignition circuit and (now that the gas is
connected) simultaneously open the gas tap allowing the gas to flow to the pilot.
Wait a few seconds while the air is purged. The electronically generated sparks should
light the pilot. The pilot should then light the main burner at its low setting. There may be
a delay of up to four seconds between the pilot lighting and ignition of the gas at the main
burner. This is normal and is due to the time required to fill the main burner compartment
with sufficient gas for ignition.
6.2.3
When the burner is operating properly, gradually slide the control knob upwards.
The burner flames should gradually increase until the knob is nearly at its highest position.
You should feel some resistance when the slide button reaches the maximum burner flame
position. Sliding further upwards until the knob comes to a stop should then turn the
burner and pilot off.
When the above checks have been completed close the isolating
valve on the inlet elbow
.
6.3
Reference Pressure Check
The appliance is pre-set to give the correct heat input at the
inlet pressure shown in section 1 of this manual. No
adjustment is necessary. Check the burner pressure by fitting
a pressure gauge at the test point. The test point is on the pipe
situated below the bottom right corner of the burner unit. See
figure 12. Check the pressure with the appliance alight and
set at maximum output.
After checking, turn off the appliance. Remove the pressure
gauge and replace the test point sealing screw. Relight the appliance. Turn to the
maximum output position and test around the sealing screw for gas soundness with a
suitable leak detection fluid.
If all the above checks are satisfactory, continue with the installation. If not, check the
control and ignition circuitry and components as described in the servicing section of this
manual.
