11
ADJUSTMENTS BEFORE FIRST FIRING
Adjustment of the combustion head, and air and gas
deliveries has been illustrated on page 9.
In addition, the following adjustments must also be
made:
-
Open manual valves up-stream from the gas train.
-
Adjust the minimum gas pressure switch to the start
of the scale (A).
-
Adjust the maximum gas pressure switch to the end
of the scale (B).
-
Adjust the air pressure switch to the zero position of
the scale (C).
-
Purge the air from the gas line.
Fit a U-type manometer (D) to the gas pressure test
point on the sleeve.
The manometer readings are used to calculate the
MAX. burner power using the diagrams on page 7.
Before starting up the burner it is good practice to adjust
the gas train so that ignition takes place in conditions of
maximum safety, i.e. with gas delivery at the minimum.
(D)
(A)
LOW GAS PRESSURE SWITCH
AIR PRESSURE SWITCH
HIGH GAS PRESSURE SWITCH
(B)
(C)
D2547
D2547
D2548
D2377
