B&C Technologies IS Series Commercial Ironer - Manual (Page 38)

• Main gas valve coil (2) connected.
• Set secondary air valve (7) open 1/2 turns from closed position.
2. Start burner. After pilot ignition watch manometer reading. When main valve opens adjust
main gas valve regulator to 2.0” WC (for natural or LP gas).
3. Very slowly open shading disk or valve (9) until first burner tip lights then stop adjusting –
the slower the better. This is the shading disk or valve position that should be locked in – do
not adjust it any more.
4. Make any fine adjustments to get a stable hard flame burn with the main gas regulator located
next to the main gas valve coil (2).
5. The burn normally drifts rich a few seconds after ignition (oxygen is burned out of the atmo-
sphere in the combustion chamber). To compensate open the secondary air valve (7) slightly
and relight the burner. Repeat until a stable clean burn is achieved. NOTE: opening the
secondary air valve (7) too far can result in a flame that will not propagate down the entire
length of the burner – make small adjustments.
6. Let the ironer cool completely to room temperature (overnight is best) and retry ignition.
Combustion performance may change drastically from hot to cold if settings are not correct.
7. With the burner operating, use a 3/16” blade flat screwdriver to slowly screw in the adjust-
ment screw in the burner pressure switch (11) until the burner shuts off. Then back the screw
up 1.5 turns.
8. The burner should now relight quickly, the flame should propagate from the pilot to the far
end of the burner quickly and reliably.
6.1.3 Normal Operation
In normal operation the burner should perform as follows:
1. Power up ironer.
2. Increase the temperature setpoint to some number higher
3. Turn on call for heat switch.
4. Combustion blower and purge timer start
5. After purge time (30 sec) ignition of pilot should begin.
6. Flame fault light turns on for 2 sec as verification of normal power-up.
7. Gas valve pilot coil (1) is turned on and ignition starts for a 7 second trial period. The main
burner delay timer is initialized (powered up) at this point.
8. Pilot should light within 3 to 5 seconds.
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