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MOUNTING JUNCTION BOX
The junction box can be mounted at the venter or remotely mounted away from the
venter. (See Figures 1 & 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-81 junction box
and secure with fastening nut. If remote mounting the CK-81 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-81 junction box or installer supplied junction box onto the wall or floor joist
without straining the flexible conduit. Fasten the CK-81 junction box through the
four dimpled locations on the base of the box. (See Figure 3)
WIRING (See Figure 4 and Table 1)
Wire the venter motor and controls in accordance with the National Electrical
Code, manufacturer's recommendations and/or applicable local codes. UNITS
MUST BE GROUNDED. Check ground circuit to make certain that the unit has
been properly grounded. The wiring should be protected by an over-current circuit
device rated at 15 amperes. CAUTION must be taken to ensure that the wiring
does not come into contact with any heat source. All line voltage and safety control
circuits between the venter and the appliance MUST be wired in accordance with
the National Electrical Code for Class I wiring or equivalent methods.
1. Route the venter motor and control wiring with an appropriate wiring method.
2. All wiring to be Class I or equivalent for line voltage or
safety control circuits.
3. All manual operation controls to gas valve must be
rendered inoperative.
S
O
EQUENCE OF
PERATION
1. Thermostat calls for heat. The relay closes and the
power venter energizes.
2. After motor is up to speed, the pressure switch closes
and the gas valve energizes.
3. When the thermostat is satisfied, the thermostat opens
and stops the gas valve operation. The post-
purge timer in the CK-81 will cause operation of
the venter motor for an additional period of
approximately one to three minutes.
Table 1
WIRE LENGTH FOR 750
MILLIVOLT WIRING
Max.
Wire
Length
Sizes
(2-wire
cable)
No. 18
30 ft.
No. 16
50 ft.
No. 14
80 ft.
Max.
Combined
Length
(2 single
wires)
60 ft.
100 ft.
160 ft.
*Floor furnace application must use
a gsk-3 spillage sensing switch.
**(Optional connections), connect to millivolt
thermostat connections on heating equipment.
Page 2
Figure 1
Figure 2
Figure 3
Figure 4
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