B&C Technologies IM Series Industrial Ironer - Manual (Page 136)

10
ADJUSTMENTS BEFORE FIRST FIRING
Adjustment of the combustion head, and air and gas
deliveries has been illustrated on page 8.
In addition, the following adjustments must also be
made:
- open manual valves on the gas train.
- Adjust the low gas pressure switch to the start of the
scale (A).
- Adjust the air pressure switch to the zero position of
the scale (B).
- Purge the air from the gas line.
- Fit a U-type manometer (C) to the gas pressure test
point on the sleeve.
The manometer readings are used to calculate MAX.
burner power using the tables on page 6.
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.
SERVOMOTOR (D)
The servomotor provides simultaneous adjustment of
the air damper, by means of the variable profile cam,
and the gas butterfly valve.
The angle of rotation of the servomotor is equal to the
angle on the graduated sector controlling the gas butter-
fly valve. The servomotor rotates through 90 degrees in
25 seconds.
Do not alter the factory setting for the cams; simply
check that they are set as indicated below:
Red cam : 90°
Limits rotation toward maximum position.
When the burner is at max output the gas butterfly valve
must be fully open: 90°.
Blue cam
: 0°
Limits rotation toward the minimum position. When the
burner is shut down the air damper and the gas butterfly
valve must be closed: 0°.
Orange cam
: 15°
Adjusts the ignition position and the MIN output.
BURNER STARTING
Close the control circuit and set switch 1)(E) to “MAN”.
As soon as the burner starts check the direction of rota-
tion of the fan blade, looking through the flame inspec-
tion window 18)(A)p.4.
BURNER FIRING
Having completed the checks indicated in the previous
heading, the pilot of the burner should fire. If the motor
starts but the flame does not appear and the flame safe-
guard goes into lock-out, reset and wait for a new firing
attempt.
Pilot adjustment has been illustrated on page. 7.
Having adjusted the pilot, reconnect the main valve and
ignite the main flame; it might require several attempts
to purge the air from the gas lines or to adjust the valve
with little gas.
Once the burner has fired, now proceed with calibration
operations.
(A)
(C)
LOW GAS PRESSURE SWITCH AIR PRESSURE SWITCH
(B)
SERVOMOTOR
(D)
(E)
1 2
D791
D2265
D2547 D2548
D2266
BLUE CAM
RED CAM
ORANGE CAM
RESET
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