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2902768
7
GB
FILTER MAINTENANCE
If necessary the filter can be replaced;
for this opera-
tion you must call the service agent.
PRESSURE STABILIZER ADJUSTMENT
By rotating the pressure regulator adjustment screw
clockwise, the gas head pressure & thus output
increases. Anti-clockwise reduces the pressure &
output.
VALVE ADJUSTMENTS
The slow opening of the valve providing reduced igni-
tion gas is adjusted by turning the screw (11, fig. 4
page 6) anti-clockwise to increase the start gas quan-
tity & clockwise to decrease it. It is possible to set the
valve to give an ignition gas rate of 80% of the maxi-
mum, however to ensure smooth ignition, we would
recommend that this value is kept to a minimum value
but that allows reliable operation. The introduction of
the main gas output is achieved through the valve
continuing to open slowly once ignition has been
achieved. The main gas throughput is set by adjusting
the screw (13, fig. 4 page 6) anti-clockwise to
increase rate & clockwise to decrease.
LOW GAS PRESSURE SWITCH ADJUSTMENT
Adjust the gas pressure switch (7, fig. 4 page 6) after
carrying out all the other adjustments of the burner
with the gas pressure switch adjusted at the beginning
of the scale.
Let the burner work at the required output. Slowly
start to close the gas isolation valve on the gas supply
manifold reducing the pressure by 5 - 6 mbar from that recorded as the normal working gas pressure measured
on your pressure gauge. Rotate the dial on the pressure switch until the dial reads just below the reduced value
now showing on your pressure gauge, the burner should shut down. Open op the isolation valve & check that the
burner starts & runs correctly.
INITIAL ADJUSTMENT OF THE GAS VALVE
ADJUSTMENT OF THE START GAS FLOW
(11, fig. 4 page 6)
Rotate the screw (11) clockwise until a resistance is felt. Rotate the screw anticlockwise for 7 turns.
This is an initial setting and may require adjusting for different outputs.
ADJUSTMENT OF THE MAIN FLOW RESTRICTOR (13, fig. 4 page 6)
Rotate the screw (13) clockwise until a resistance is felt. Rotate the screw anticlockwise for three turns.
This is an initial setting for the burner to fire and will require adjusting for different outputs.
PRESSURE GOVERNOR (12, fig. 4 page 6)
Rotate the screw (12) anticlockwise until you hear the click at the end of a full rotation at this point.
Rotate the screw clockwise by
12 turns
this will set the governor at a mid position from where adjustments to the
through put can be made.
GAS PRESSURE (M3, fig. 4 page 6)
The gas head pressure is measured at the pressure test point (M3).
AIR DAMPER ADJUSTMENT
The air is adjusted by turning the screw (3, fig. 6, page 10).
D4061
Содержание 3768000
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