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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 & 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-21 junction box and secure with fastening nut. If remote mounting the CK-21
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-21 junction box or installer
supplied junction box onto the wall or floor joist without straining the flexible conduit. Fasten the CK-21 junction box
through the four dimpled locations on the base of the box. (See Figure 3)
Figure 1
INSTALLATION OF GAS PRESSURE SWITCH
CAUTION: Maximum gas pressure MUST NOT exceed 14" W.C.
Pressure. Gas supply must be shut off before working on piping
systems.
NOTE: Seal all pipe connections with pipe thread sealant.
1. Remove pressure tap plug in manifold.
2. Install 1/8" NPT Street elbow (if required for mounting the gas
pressure switch vertically) in place of the pressure tap plug. Then
install the 3" x 1/8" NPT nipple, pipe tee and pressure tap plug.
(See Figure 4)
3. Install the Gas Pressure Switch into the side of the pipe tee.
Position the switch vent, on the side of the switch, down. Next,
install the brass elbow into the switch vent on the Pressure Switch.
4. Install the bleed tube into the brass elbow; then route the tubing
up and terminate it near burner. (See Figure 4)
NOTE: Gas Pressure Switch MUST be mounted vertically.
CAUTION: Bleed tube MUST be installed with its termination near the main burner.
INSTALLATION OF SAFETY SPILLAGE SWITCHES
NOTE: Water Heater MUST have safety switches installed. Installation of a SAFETY
SWITCH is REQUIRED for water heaters, for the purpose of detecting spillage from a
blocked flue system and/or inadequate draft.
1. Bend the tab attached to the spillage switches as shown in Figure 5.
2. Mount the spillage switches along the opening of the draft hood. (See Figure 6)
Connect one terminal on each spillage switch with the 8" jumper wire. Then connect
the other two terminals to the jacketed wire. Route the jacketed wire along the frame or
enclosure of the water heater, keeping the wires away from any HOT surface area.
Secure the wire with adhesive tabs. (See Figure 6)
3. Splice the jacketed wire in series with one of the leads connected to the thermocouple
splicing terminal. (See Figure 6)
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
re-starting the system.
Figure 2
Page 2
Figure 3
Figure 4
Figure 5
Figure 6
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