User Guide

page 3 of 8
ADJUSTMENTS
PROVING SWITCH ADJUSTMENTS
After proper air  ow is established, the pressure switch adjustment
is made by turning the pressure switch adjustment screw clockwise
(See Figure 4) until burner operation stops. Turn the adjustment screw
counterclockwise until burner ignites. Turn the adjustment screw
an additional
1
⁄4 to
3
⁄4 turn counterclockwise to ensure adequate
switch adjustment.
WARNING: Failure to properly adjust the pressure switch as speci ed
above could lead to improper operation of the pressure switch which will
result in a hazardous condition and bodily harm!
THERMOSTAT HEAT ANTICIPATOR ADJUSTMENT
After venting kit installation and checkout, check the amperage current draw
through the thermostat circuit and adjust the thermostat anticipator accordingly.
INSTALLATION OF GAS PRESSURE SWITCH
CAUTION: Check gas control valve pressure. Pressure MUST NOT exceed 14” WC
pressure.
1. Remove pressure tap plug in gas valve. (See Figure 5) NOTE: If installing
on an existing appliance, shut o gas supply to gas valve before
plug removal.
2. Replace the pressure tap plug with the
1
⁄8" pipe nipple and pipe tee.
Install pressure tap plug at the bottom of the pipe tee. (See Figure 6)
3. Install the gas pressure switch into the side of the pipe tee. The gas
pressure switch is supplied with a restrictor ori ce in the inlet and outlet
ports. With these ori ces in place, the switch does not need to be vented.
This feature complies with current ANSI standards for gas regulators.
(See Figure 7)
CAUTION: If for any reason the system has shut down during operation, the
cause of the system failure should be investigated and corrected before resetting
the safety switch and restarting the system.
DRAFT HOOD SAFETY SWITCH INSTALLATION PROCEDURE
NOTE: 12 ga. wire should be used when wiring safety spillage switches, to
reduce the voltage drop in the thermocouple circuit.
1. Remove the thermocouple from the gas control valve. (See Figure 5)
2. Thread the junction block into the thermocouple port and thermocouple into
the bottom of the junction block. (See Figure 8)
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
P/N 46490500 Rev D 04/20