Section Three - Service; Adjustments; Southbend - Southbend 171-40A Owner's Manual

AT LEAST TWICE A YEAR HAVE YOUR SOUTHBEND AUTHORIZED SERVICE AGENCY
CLEAN AND ADJUST THE UNIT FOR MAXIMUM PERFORMANCE.
In case of problems in operation at initial installation, check type of gas and manifold pressure and compare with
information listed on the serial plate, located at the left front corner of the body top.
BROILER:
PILOT VALVE LOCATIONS: There is a single adjustment behind the hole at the center of the perforated panel above
the warming oven.
Adjustment to pilots id made by turning the small slotted screw on the pilot valve. The flame on each pilot should be
approximately 3/4" high.
LOW SETTING: The LO adjustment of the broiler burner valves is by a set screw in the hollow stem of this valve.
Turn "IN," or clockwise, to reduce and "OUT," or counterclockwise, to increase. Burner flame on low setting should
not flutter or "POP," but should burn with a dull red and a blue haze.
AIR ADJUSTMENT: In the blower area, above the warming oven, the blower inlet is against a large air supply
duct. The blower is pulling air through a 5 ½" diameter hole in this duct. A sliding gate regulates the amount of air
pulled through this opening. By loosening a set screw, this gate can be moved to restrict the air supply to the
burners.
If the flame is blowing away from the burner there is an excess of air. Close the air shutter on the blower until the flame
stabilizes. Adjust for brightest glow without blue haze or blowing.
The screen on the blower intake may be clogged with lint. Use vacuum cleaner attachment to clean.
PRESSURE REGULATOR:
1. Locate 1/8" pressure tap.
A. For units with the "A" suffix, a 1/8" pressure tap is located on each of the two burner manifolds. These
manifolds are located behind the stainless steel panel above each broiling section. Remove the two screws
securing it. A second panel will be found behind the first. Remove the six screws securing it and remove the
second panel. The manifolds should now be visible.
B. For units with "D" suffix, the 1/8" pressure tap is located along the front top edge of the unit, just past the
pressure regulator.
2. Turn "OFF" main gas supply to unit and all valves.
3. Remove the 1/8" pipe plug and install a fitting appropriate for the connection of a manometer.
4. Connect the manometer.
5. Turn main gas "ON."
6. Light all pilots.
7. Turn all burners to full on.
8. Read manometer.
A. For all units Broiler Section, the manometer should read 4" W.C. for natural gas and 10" W.C. for propane
gas.
INFRA-RED BROILERS
SERVICE

ADJUSTMENTS

SECTION THREE — SERVICE
INFRA-RED BROILERS
PAGE 1