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ADJUSTMENTS
P
S
A
ROVING
WITCH
DJUSTMENTS
After proper airflow is established, the pressure switch adjustment is made by
turning the pressure switch adjustment screw clockwise (See Figure 7) 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 specified
above could lead to improper operation of the pressure switch which will
result in a hazardous condition and bodily harm!
T
H
A
HERMOSTAT
EAT
NTICIPATOR
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 8)
NOTE: If installing on an existing appliance, shut off
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 9)
3. Install the gas pressure switch into the side of the pipe
tee. The gas pressure switch is supplied with a
restrictor orifice in the inlet and outlet ports. With these
orifices in place, the switch does not need to be vented.
This feature complies with current ANSI standards for
gas regulators. (See Figure 10).
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
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 8)
2. Thread the junction block into the thermocouple port and thermocouple into
the bottom of the junction block. Connect lead wire from the junction block to
the jacketed lead wires or wire enclosed in an accepted wiring enclosure.
(See Figure 11)
NOTE: Draft spillage switches should be mounted 90 degrees apart, and
mounted opposite from the vent outlet direction. (See Figure 12)
3. Mount the two spillage switches onto the draft hood and connect inside terminals of
switches with jumper wire. Connect outside terminals to lead wires which are
connected to the thermocouple junction block. (See Diagram A)
4. Route jacketed lead wires or accepted wiring enclosure on the outside of the water
heater enclosure. Secure them to the enclosure with an accepted hold down tab. Keep
wiring away from any HOT surface area.
A
DJUSTMENT
SWITCH
INSTALLATION
Figure 10
Page 4
Figure 8
Figure 7
Figure 9
Figure 11
Figure 12
Figure 13
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