Field Controls B794664 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 30-millivolt controlled Natural or LP 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.

ITEMS INCLUDED IN KIT

1- Junction box
1- Fan control gas pressure switch with built in post purge option

1

1­ 1-

⁄8" NPT x 3" pipe nipple

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" jumper wire
1- Flexible conduit connector
2- GSK-3 Spillage Switches

READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY BEFORE PROCEEDING WITH THE INSTALLATION.

This device MUST be installed by a qualified agency in accordance with the manufacturer's installation instructions. The definition of
a qualified agency is: any individual, firm, corporation or company which either in person or through a representative is engaged
in, and is responsible for, the installation and operation of HVAC appliances, who is experienced in such work, familiar with all the
precautions required, and has complied with all the requirements of the authority having jurisdiction.

Please retain these instructions after installation.

Installed By: Phone:

www.fieldcontrols.com

Installation Date:

MOUNTING JUNCTION BOX

The junction box can be mounted at the venter or remotely mounted away from the venter.
(See Figures 1 & 2)

Remove one of the knockouts from the side of the junction box. Install the flexible conduit connector onto the 1.
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.

Fasten the flexible conduit from the SWG Venter into the conduit connector. Mount the CK-20F junction box or 2.
installer supplied junction box onto the wall or floor joist without straining the flexible conduit. Fasten the CK­20F junction box through the four dimpled locations on the base of the box. (See Figure 1)

page 2

Figure 1

Figure 2

INSTALLATION OF GAS PRESSURE SWITCH
CAUTION: Check gas control valve pressure.

Pressure must not exceed 14” WC pressure.

Remove pressure tap plug in gas valve. 1.
(See Figure 3) NOTE: If installing on an existing
appliance, shut off gas supply to gas valve before
plug removal.

1

Replace the pressure tap plug with the 2.

⁄8” pipe
nipple and pipe tee. Install pressure tap plug at the
bottom of the pipe tee. (See Figure 4)

Install the gas pressure switch into the side of the 3.
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 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.

Figure 3

page 3

Figure 4

Figure 5