21
12.
GAS SUPPLY INSTALLATION
12.1
Connect the supply line to the appliance.
Unless the supply pipe connection is from the left front side, the supply pipe will have to
be formed to avoid various components below the burner. An installation template is
supplied which contains a diagram for bending this supply pipe.
12.2
Gas soundness check
Pressure check the installation pipework for gas soundness in accordance with the
current edition of BS6891. Do not use leak detection sprays on this appliance. Sprays
may affect the operation of electrical components. Keep all liquid detection fluids clear of
electrical components. A long brush may be required to reach some joints.
12.3
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.
12.3.1
Switch on electrical power supply. The red indicator light at the left side of the
burner should be on.
12.3.2
If closed, open the isolating valve at the inlet elbow.
12.3.3
Press and hold in the “on” switch. Within two seconds, the Fan motor should
start and the indicator light should go out.
12.3.4
Release the “on” switch. The fan should continue to run.
12.3.5
Depress the control knob and turn anticlockwise partially towards the
“PILOT/IGN” position until some resistance is felt. Keep depressed at this position to
purge air from the system then, while keeping it depressed, turn fully to the
“PILOT/IGN” position. A spark should be generated at the pilot while turning. The
spark should ignite the pilot.
12.3.6
When pilot ignition has been achieved, keep the control knob depressed for
approximately ten seconds to allow the thermocouple probe to warm up and then release
it. If the pilot does not remain alight, ensure that the air has been purged, that the pilot
orifice is clear and that the thermocouple connections are sound. Replace the pilot unit if
necessary (see servicing section of this manual).
12.3.7
When the pilot is alight and stable, partially depress the knob and turn to “LOW”.
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.
12.3.8
With the burner at “LOW”, partially depress the control knob and gradually turn
it anti-clockwise. The burner flames should gradually increase until the knob reaches the
“HIGH” position.
When the above checks have been completed partially depress the control
knob and turn to “OFF”.
12.3.9
Press the “off” switch. The fan should stop and the indicator light should come
on.
12.3.10
If 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.
12.4
Check Reference Pressure.
The appliance is pre-set to give the correct heat input at the inlet pressure shown in part 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 36). Check the pressure with the fan on, 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.
Do not use
leak detection sprays on this appliance. Sprays may affect the operation of electrical
components. Keep all liquid detection fluids clear of electrical components.
Figure 36 Pressure test point
Содержание Lincoln BR517S
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