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SYSTEM CONTROL KIT
Model: CK-20F and CK-20FG
(NOTE: CK-20FG units are designed for the Flame Guard units built by
American Water Heater. All other manufacturers use CK-20F)
Designed for use with the SWG Series Power Venter for controlling a 30millivolt controlled Natural or L.P. Gas appliances with a pressure tap port
in the Gas Valve. This kit may also be used with the PVG series sidewall
Power Venters, DI series Draft Inducers, and CAS-4 Combustion Air
System. The included junction box is not required when using a PVG or
CAS-4.
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TEMS INCLUDED IN KIT
1) Junction box
1) Fan control gas pressure switch with built in post purge option
1) 1/8" NPT x 3 inch pipe nipple
1) 1/8" NPT pipe tee
1) TCA-1 Thermocouple Adapter (CK-20F)
1) TCA-2 Left Handed Thermocouple Adapter (CK-20FG)
1) 6 ft. length of 12-2 wire
1) 12 inch jumper wire
1) Flexible conduit connector
2) GSK-3 Spillage Switch
DO NOT DESTROY
THESE INSTRUCTIONS MUST REMAIN WITH EQUIPMENT
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MOUNTING JUNCTION BOX
The junction box can be mounted at the venter or remotely mounted away from the venter. (See Figure 1 & 2)
1. Remove one of the knockouts from the side of the junction box. Install the flexible conduit connector onto the CK-20F
junction box and secure with fastening nut. If remote mounting the CK-20F junction box, mount the flexible conduit
connector onto a 2" x 4" installer supplied junction box.
2. Fasten the flexible conduit from the SWG Venter into the conduit connector. Mount the CK-20F junction box or
installer supplied junction box onto the wall or floor joist without straining the flexible conduit. Fasten the CK-20F
junction box through the four dimpled locations on the base of the box. (See Figure 1)
Figure 1
INSTALLATION OF GAS PRESSURE SWITCH
Figure 2
Figure 3
CAUTION: Check gas control valve pressure.
Pressure must not exceed 14" WC pressure.
1. Remove pressure tap plug in gas valve.
(See Figure 3)
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 4)
3. Install the gas pressure switch into the
side of the pipe tee. The gas pressure
Figure 4
Figure 5
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 5)
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
NOTE: 12 ga. wire must be used when wiring safety
spillage switches, to reduce the voltage drop in the
Figure 6
Figure 7
thermocouple circuit.
1. Remove the thermocouple from the gas control valve. (See Figure 3)
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 6)
NOTE: Draft spillage switches must be mounted 90 degrees apart, and mounted opposite from the vent outlet direction.
(See Figure 7)
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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.
WIRING
CAUTION: Disconnect electrical power when wiring power venter
Wire the venter motor and controls in accordance with the National Electrical Code, manufacturer's recommendations
and/or applicable local codes. Units must be grounded. Check ground circuit to make certain that the unit has been
properly grounded. The wiring should be protected by an overcurrent circuit device rated at 15 amperes. CAUTION must
be taken to ensure that the wiring does not come into contact with any heat source. All line voltage and safety control
circuits, between the venter and the appliance, must be wired in accordance with the National Electrical Code for class
one wiring or equivalent methods. Route the venter motor and control wiring with an appropriate wiring method. Refer to
Wiring Diagram A.
Refer to the SWG Venter installation instructions for setting system airflow.
Diagram A
SYSTEM CONTROL CHECK OUT PROCEDURES
G
AS 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 sec. 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.
S
PILLAGE 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 flue gas spillage for
the spillage switches to sense the spillage and disrupt the thermocouple circuit, halting the gas flow 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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TROUBLE SHOOTING HINTS
1. Venter does not activate when thermostat calls for heat.
a. Check wiring.
b. Check gas pressure switch for continuity across terminals when gas valve is pressurized.
c. Check gas pressure.
2. Flue gas odor:
a. Check system draft.
b. Check for negative pressure in building.
3. Pilot will not stay lit on water heater:
a. Solder all spillage switch wire terminal connections.
b. Check reset buttons on spillage switches.
c. Use 12 gage wire for all spillage switch wiring.
d. Check for interruption of supply power.
REPAIR AND REPLACEMENT PARTS LIST
REPAIR AND REPLACEMENT PARTS LIST
DESCRIPTION PART NUMBER
Gas Pressure Switch 46284200
GSK-3 Spillage Switch 46086400
Thermocouple Junction Box 46082700
INSTALLATION INFORMATION
MODEL NO.:____________________________________________________________
CK-20F
INSTALLER'S NAME:_____________________________________________________
INSTALLER'S COMPANY: _________________________________________________
INSTALLER'S PHONE NO.: ________________________________________________
DATE OF INSTALLATION:_________________________________________________
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P/N 46285000 Rev G 02/04
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