Spillage Switches - Field Controls CK-92FVP Quick Start Manual

SYSTEM CONTROL CHECK OUT PROCEDURES
1. Adjust the thermostat and/or aquastat to call for heat and observe the power venting system for proper
operation sequence. (Repeat if necessary.)
a. Aquastat calls for heat.
b. After a short delay, the relay is energized, the venter motor starts and the vent damper
begins opening.
c. Pressure switch closes, the vent damper reaches the open position and the burner starts.
d. Aquastat is satisfi ed, the burner stops and the vent damper begins closing.
e. This starts the post purge cycle. Purge time 1 to 2 min.
2. While system is operating, disconnect power to the venter motor. This should open the pressure switch
contacts and stop burner operation.
GAS PRESSURE SWITCH FOR WATER HEATER
1. Follow water heater manufacturer's instructions to light pilot. Turn the gas control valve to the ON
position. Then adjust the thermostat to call for heat, which will energize the venter motor. (May see a 1 to
8 second delay of venter motor.)
2. Turn gas control valve to the PILOT position, which will start a 1 to 3 min. post purge of the venter motor.
3. Repeat Step 1 and 2 to ensure proper operation.

SPILLAGE SWITCHES

1. Allow the water heater to heat up to operating temperature, then disconnect the power to the gas
pressure switch.
2. Adjust the thermostat to call for heat with the venter inoperative. Allow approximately 2 minutes of fl ue
gas spillage for the spillage switches to sense the spillage and disrupt the thermocouple circuit, halting
the gas fl ow to the pilot and burner.
3. Wait 2 to 3 minutes. Reset the spillage switches and light the pilot, then perform a second safety spillage
test. (Steps 1 and 2)
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.
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Diagram C
P/N 46490500 Rev C 01/18