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8
Before beginning any wiring, study the appropriate wiring diagram for your unit. Also refer back to gures C
or D for an example of what the completed job will look like.
Locate the best place to route the power for the blower, and drill a 7/8” hole in the lter
box. This hole size will accomodate a “romex” connector. Attach the blower and power wires as shown on the
appropriate wiring diagram.
Once you have the plenum installed, the fan control with high limit switch can be installed. The Fan control/
high limit switch is packaged with a jumper between the two sets of terminals inside. REMOVE THE JUMPER
WIRE INSIDE THE FAN CONTROL. The fan control should be installed in the right side of the plenum and 12 to
18 inches above the top of the furnace. A separate conduit should be run from the fan control to the junction box.
Mount the thermostat in a central location of the area you want to heat. Run two wires to the junction box, from
the heating terminals on the thermostat. 22 gauge or thicker wire is acceptable.
The next step is to run a 120 volt line from your breaker panel to the junction box. Attach all wires according to
the corresponding wiring diagram, and install the relay into the junction box. DO NOT TURN ON THE BREAKER
UNTIL ALL WIRING IS COMPLETE AND THE RELAY IS SECURED.