Field controls CK-91F, CK-91FG User Manual

24 VAC SYSTEM CONTROL KIT

Model: CK-91F and CK-91FG

Designed for use with the SWG Series Power Venter for controlling Natural Gas or L.P. Gas draft induced
appliances with a 24 VAC Gas Valve and a 30-millivolt controlled Natural or L.P. Gas Water Heater.

I

TEMS INCLUDED IN KIT:

1) Junction box with mounted pressure switch and post purge timer

1) Fan control gas pressure switch with built in post purge option

1) 2 ft. length of 1/4 inch aluminum tubing

1) 1/8" NPT x 3 inch pipe nipple

1) 1/8" NPT x 1/4 inch OD tubing elbow

1) 1/8" NPT pipe tee

1) TCA-1 Thermocouple Adaptor (CK-91F)

1) TCA-2 Left Handed Thermocouple Adaptor (CK-91FG)

1) 6 ft. length of 12-2 wire

1) 8 inch jumper wire

2) Flexible conduit connector

2) GSK-3 Spillage Switch

1) 4" MG1 Barometric Draft Control

1) 1/4 inch tubing connector

DO NOT DESTROY

THESE INSTRUCTIONS MUST REMAIN WITH EQUIPMENT

INSTALLATION

M

OUNTING JUNCTION BOX

Typical Vent System Layout

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

1. Remove one of the knockouts from the side of the junction box where the
pressure switch is mounted. Install the flexible conduit connector onto the
CK-91F junction box and secure with fastening nut. If remote mounting the
CK-91F 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-91F junction box or installer supplied junction box onto the
wall or floor joist without straining the flexible conduit. Fasten the CK-91F
junction box through the four dimpled locations on the base of the box. (See
Figure 3)

P

RESSURE SWITCH SENSING TUBE INSTALLATION

1. Attach the 1/4 inch tubing connector to the pressure tube on the SWG
Venter. (See Figure 3)

2. Connect the supplied 1/4" aluminum tubing to the tubing connector. Route
the tubing to the CK-91F junction box and connect the tubing to the
pressure switch. When routing the tubing, avoid kinking the tubing by
bending the tubing too sharply.

For remote mounted CK-91F Junction Box, use a 1/4" OD copper, aluminum or
plastic tubing and route the tubing to avoid contact with any heat source.

Figure 1

Figure 2

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Figure 3

DRAFT CONTROL INSTALLATION
CAUTION: This draft control is shipped as a single acting draft control. If the draft

control is not being used on a gas draft induced furnace, remove the gate stop on
the draft control ring before installing.

C

OLLAR INSTALLATION

This control is shipped with a collar patterned to fit a single wall round vent pipe. To
attach this collar to the flue, See Figure 4 and follow the instructions below.

1. Bend outward the two ears at the front corners of the collar. Bend 90 degrees,
1/4 inch behind the single hole on the straps.

2. Insert clamping screw in ears on collar and bolt the remainder of the collar

Figure 4

together.

3. Hold the collar against the side of the flue in the exact position it is to be installed (shown by dotted lines) and mark
the outline of the collar on the flue.

4. Cut a hole in the flue about 1/2" inside of this outline.

5. Make a series of cuts about 1/2" apart from the edge of this hole to the outline marks.

6. Strap the collar to the flue pipe.

7. Bend the tabs formed by the series of cuts outward against the inside of the collar to make a tight joint.

8. Insert the draft control. (See Draft Control Installation and Adjustment Section.)

D

RAFT CONTROL INSTALLATION IN TYPE B VENT PIPE

CAUTION: DO NOT use the supplied collar when mounting draft

control to Type B Vent Pipe. Install by using a Type B Vent Pipe
Tee.

1. Install a vent pipe reducer or increaser into the inner pipe and
fasten using sheet metal screws. (See Figure 5)

2. The opening of the Type B Vent Tee, at the draft control
mounting location, should be sealed with a high temperature
sealant or equivalent.

3. Refer to Draft Control Installation Section.

DRAFT CONTROL INSTALLATION AND ADJUSTMENT

1. Insert the draft control into the collar or tee. The front face of
the control MUST be plumb and the bearing surfaces MUST
be level whether the control is on a horizontal, vertical or

Figure 5

sloping flue pipe.

2. Use a spirit level and level accurately. (See Figure 5) Secure
the control in the collar by tightening the clamping screws. If a
tee is used or a collar is supplied locally, the control may be
held in place by sheet metal screws.

A

DJUSTING THE DRAFT CONTROL WITH 4" MG1

The control MUST be adjusted to the desired draft setting by
adding or removing the washer-type weights supported by the two
chains on the side of the draft control. (See Figure 6) DO NOT
move the weight attached directly to the gate, this is used only for
balancing at the factory.

W

HAT DRAFT SETTING TO USE

When adjusting the control, two things are essential;

1. The burner must be operating for at least 10 minutes to obtain
maximum chimney draft.

Figure 6

2. An analysis of the flue gases is necessary to determine the
percentage of CO

Refer to the appliance instructions and/or to the local gas company for the proper CO

and check for presence of CO.

2

readings and allowable CO levels.

2

A rule of thumb for draft setting is between .01" to .03" of water column draft at the appliance outlet. (Check equipment
requirement.)

Changes in the adjustment of the 4" MG1 control should be made by adding or removing the washer-like weights
(supplied with the control) to or from the weight holder chain assembly. After the control is adjusted, it's action will be
entirely automatic, the gate will open or close by itself to correct for changes in the draft that occur in the chimney.

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