Glow-worm Black Beauty 4 - Manual (Page 10)

10 221906B
Diagram 4.6
9494
2.5-4.0mm
GAP
4 Fire Front Preparation
Diagram 4.4
9641
158mm
58mm
FIRE FRONT
WALL DATUM
FIRE FRONT
WALL FACE
GAS FIRE
FEED PIPE
4.3 Gas Supply to Fire Front
Check that the gas service cock is in the Off position.
NOTE: The gas fire feed pipe will need cutting at the plain end
at a point depending upon the position of the BBU to the fire front
wall face.
From the fittings pack, fit the union nut to the flanged end of the
gas fire feed pipe.
Connect the gas fire feed pipe assembly to the gas fire supply
cock, see diagram 4.3.
The gas fire feed pipe must project from the fire front wall face,
158 mm, see diagram 4.4. Measure and cut to suit.
From the fittings pack, fit the gas fire isolating valve to the cut
end of the gas fire feed pipe, ensuring it is positioned correctly,
using an olive and nut, see diagram 4.5.
When fitted check that the gas fire feed pipe, where it projects
from the fire front wall face, is level and the centre of the feed
pipe is 58 mm above the back boiler base plate.
Tighten connections.
Make sure that the gas fire isolating valve is in the Off position
by removing cap and turning restrictor screw clockwise, see
diagram 4.5.
Turn the gas service cock to the On position.
Turn the gas fire supply cock to the On position by removing cap
and turning restrictor screw anti-clockwise, see diagram 4.3.
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.
4.4 Check ignition spark
Before attempting to install, it is worth checking that the piezo
electric spark ignition system operates satisfactorily.
To initiate the spark, temporarily refit the control knob to the tap
spindle. Depress the control knob and while keeping it depressed,
turn anticlockwise through approximately 60
o to the 1/IGN
position. A spark should track from the electrode pin to pilot
burner. If there is no spark or incorrect tracking, check that the
spark gap is between the limits shown in diagram 4.5. If the
spark gap is correct, check the ignition wiring.
Remove the control knob after checking.
Diagram 4.5
9639
FIRE
ISOLATING
VALVE
CAP
WASHER
RESTRICTOR
SCREW