Southbend P32D-171 - Manual (Page 30)

I NFRARED B ROILER
OWNER’S MANUAL 1199790 REV 0 (6/14) PAGE 30 OF 46
A DJUSTMENTS
A DJUSTMENT OF O VEN P ILOT AND B URNER
The burner orifice is of the fixed type, sized for the type of gas and the operating altitude. To adjust the burner air-gas
mixture, loosen the screw that secures the air shutter on the mixer face and rotate the mixer cap to obtain a clear,
stable blue flame with a distinct inner cone at each port. Excessive primary air causes “blowing” (the flames leaving the
ports), while insufficient primary air causes a soft or yellow tipped flame.
The oven pilot flame is adjusted by using a screwdriver to turn the adjusting screw on the pilot line valve (see drawing
below). The pilot line valve is located behind the kick panel below the oven door. To gain access, lift the kick panel
straight up and pull the top edge out. The pilot flame is properly adjusted when it is just large enough to maintain a
glowing red color of the flame switch capillary bulb. The first indication of over-adjustment is when the flame tip be-
comes yellow and begins to generate carbon, which appears as rising black streaks. Continued over-adjustment leads
to unstable lifting and a blowing condition
Figure 13
UNITS WITH STANDING PILOT
Adjustment Screw for Pilot
Adjustment Screw for Pilot
Air Shutter
Pilot
Pilot
Air Shutter
UNITS WITH ELECTRONIC IGNITION