Field controls CK-20F, CK-20FG User Manual

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.

I

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

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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