Glow-worm Black Beauty 4 - Manual (Page 13)

13 221906B
GAS
TAP
PRESSURE
TEST
POINT
Diagram 6.1
9498
6.1 Check Control Settings
If closed, open the isolating valve at the inlet elbow.
To help in checking the control positions while the outer case is
detached, place the control bezel over the gas tap spindle and
against the tap bracket. Temporarily secure to the tap bracket
with one of the screws.
Fit the control knob over the gas tap spindle.
Depress the control knob and turn anticlockwise partially towards
the 1/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 1/IGN position. A spark should be
generated at the pilot while turning. The spark should ignite the
pilot.
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).
Check all the control settings. These are:-
Knob Burner appearance
Position
1/IGN Centre section on low. Outer sections off.
2 Centre section fully on. Outer sections off.
3 Centre section fully on. Outer sections on low.4
4 Centre and outer sections fully on.
6.2 Flame Supervision Device
The pilot unit incorporates a system which will automatically
shut off the gas supply if the pilot flame goes out or if there is
insufficient oxygen due to spillage or lack of ventilation.
Check that the system operates properly as follows;
Light the appliance. Set at position 4 and leave for one minute.
Turn back to “OFF” to extinguish the pilot. Note the time when
the pilot goes out. Listen for a snap sound at the gas tap. Note
the time when the sound is heard. This sound is caused by an
electromagnetic valve shutting off the gas supply through the
tap. The valve is located in the body of the tap. The valve should
operate within 60 seconds of the pilot going out. If the valve does
not operate within this time limit do not allow the appliance to be
used until the fault has been corrected.
6 Control & Pressure Checks
9496
Diagram 6.2
BACK PANEL
WING (2)
CHASSIS
BACK PANEL
6.3 Flue Blockage Safety Device
This monitoring system must not be adjusted, bypassed or put
out of operation.
This monitoring system, or any of its parts, must only be
exchanged using Glow-worm authorised parts.
6.4 Check Burner Pressure
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, see diagram 6.1. Check the pressure
with the appliance alight and set at maximum output (Control
position 4).
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.
6.5 Fit The Outer Case
Refit the outer case. Make sure the ridges on the back of the
outer case is located behind the back panel wings on the
chassis back panel, see diagram 6.2.
Secure the case at the bottom sides with the two screws
previously removed.
Place the control bezel back in position and secure it to the gas
tap bracket with two screws.
Fit the control knob over the gas tap spindle.
Refit the glass panel surround by sliding it upwards to locate its
upper tabs in the slots underneath the outer case hood. Push
the bottom of the surround fully against the case cross panel.
Drop the surround down so that the two screw heads at the back
of the surround locate in the cross panel, see diagram 6
"Instructions for Use".