Field Controls B794621 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.
ITEMS 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
1- 2 ft. length of
1
1 1 1-
⁄8" NPT x 3" pipe nipple
1
⁄8" NPT x 1⁄4" OD tubing elbow
1
⁄8" NPT pipe tee
⁄4" aluminum tubing
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" jumper wire
2- Flexible conduit connector
2- GSK-3 Spillage Switch
1- 4" MG1 Barometric Draft Control
1
1-
⁄4" tubing connector
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:
Typical Vent System Layout
MOUNTING JUNCTION BOX
The junction box can be mounted at the venter or remotely mounted away from the venter.
(See Figure 1 & Figure 2)
Remove one of the knockouts from the side of the junction 1.
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.
Fasten the flexible conduit from the SWG Venter into the 2.
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)
PRESSURE SWITCH SENSING TUBE INSTALLATION
1
Attach the 1.
SWG Venter. (See Figure 3)
Connect the supplied 2.
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
aluminum or plastic tubing and route the tubing to avoid contact
with any heat source.
⁄4" tubing connector to the pressure tube on the
1
⁄4" aluminum tubing to the tubing
1
⁄4" OD copper,
Figure 1
Figure 2
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.
page 2
Figure 3
COLLAR 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.
Bend outward the two ears at the front corners of the collar. Bend 1.
90 degrees,
1
⁄4" behind the single hole on the straps.
Insert clamping screw in ears on collar and bolt the remainder of 2.
the collar together.
Hold the collar against the side of the flue in the exact position it 3.
is to be installed (shown by dotted lines) and mark the outline of
Figure 4
the collar on the flue.
Cut a hole in the flue about 4.
Make a series of cuts about 5.
1
⁄2" inside of this outline.
1
⁄2" apart from the edge of this hole to the outline marks.
Strap the collar to the flue pipe.6.
Bend the tabs formed by the series of cuts outward against the inside of the collar to make a tight joint.7.
Insert the draft control. (See Draft Control Installation and Adjustment Section.)8.
DRAFT 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.
Install a vent pipe reducer or increaser into the inner pipe and fasten using sheet metal screws. 1.
(See Figure 5)
The opening of the Type B Vent Tee, at the draft control 2.
mounting location, should be sealed with a high
temperature sealant or equivalent.
Refer to Draft Control Installation Section.3.
DRAFT CONTROL INSTALLATION AND ADJUSTMENT
Insert the draft control into the collar or tee. The front face 1.
of the control MUST be plumb and the bearing surfaces
MUST be level whether the control is on a horizontal,
vertical or sloping flue pipe.
Use a spirit level and level accurately. (See Figure 5) 2.
Secure the control in the collar by tightening the clamping
Figure 5
screws. If a tee is used or a collar is supplied locally, the
control may be held in place by sheet metal screws.
ADJUSTING 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.
WHAT DRAFT SETTING TO USE
When adjusting the control, two things are essential;
The burner must be operating for at least 10 minutes to 1.
obtain maximum chimney draft.
Figure 6
An analysis of the flue gases is necessary to determine the 2.
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
2
allowable CO levels. 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,
its 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.
page 3
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