B&C Technologies IS Series Commercial Ironer - Manual (Page 37)

6.1.1 Setting the Pilot
1. Disconnect one of the wires from the main coil (2) of the gas valve to prevent the main burner
from lighting.
2. Close main gas cut-off (8).
3. Close the pilot air valve (4) and open 1/8 of a turn as a starting point.
4. Power up the machine and turn on the heat switch. After a delay period the pilot ignition
should begin. The ignition period is 7 seconds.
5. After pilot ignition slowly open the pilot air valve (4) until the flame changes from purple
to blue with a light blue center cone. At this point you should have maximum flame sense
current and a flame that re-lights quickly and is hard to blow out.
6. On newer models, pilot gas is controlled by a non-adjustable metering orifice. If your ma-
chine has a pilot gas adjustment valve, do the following: Note the length of the flame, it
should be 3 to 4 inches in length. If it is shorter open up the pilot gas valve (3) 1/8 of a turn
and repeat step 5. If it is longer, close the pilot gas valve (3) 1/8 of a turn or less and repeat
step 5. The pilot gas valve (3) should not be adjusted unless absolutely necessary – try the
air adjustment thoroughly before making any gas delivery adjustment.
7. When the flame is properly adjusted you will have a clean stable pilot that is difficult to blow
out and has maximum flame sense current (at least 20uA, 25uA typical). When measured
with the C
HANNEL P RODUCTS FT-003 flame sense probe the pilot should read 40-45mV DC
when set properly.
8. If you cannot achieve a stable clean pilot flame call B&C Technologies for assistance.
9. DO NOT proceed to main burner testing and setup until this section has been completed
properly.
6.1.2 Setting the Main Burner
1. Before starting make sure have a completed the pilot setup procedure and have a stable pilot
burn with good flame current. Make sure the the following settings are made:
• Set shading disk or valve (9) open slightly from closed position (5deg. for shading disk,
1/4 turn for shading valve).
• Main gas cut-off valve (8) open.
• Manometer connected to the gas valve test port (10).
• Main air valve (6)
– IS-32120 – closed 3 turns from full open
– IS-24120 – closed 2 turns from full open
– IS-18120 – closed 0 turns from full open
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