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- Connect the blue wire of the harness to the back
of the blower prover switch.
- Connect the yellow wire of the harness to the
remaining terminal on the blower prover switch.
- Connect the green wire of the harness to the
ground screw where the green wire with a yel-
low trace, from the blower motor, is connected.
- Connect the black wire of the harness to the
black wire from the blower motor.
- Connect the white wire of the harness to the
white wire from the blower motor.
5. Replace the cover to the blower's junction box.
3.3 Connect the Heater to the UC1
Controller
The installer must construct a wire harness of the
length needed to connect the heater to the UC1 con-
troller. Use wire of 20 AWG minimum with insulation
rated at 90
o
C or higher. Installation can be made simpler
by matching the colors of the wires in the heater, i.e.
black with a yellow trace, yellow, black and purple. In
any case the connections must be per the wiring dia-
gram (see Figure 10 or 11). Run the wires in approved
conduit.
Figure 9. Connections at the Power Venter Blower
Junction Box
3.3.1
Connections at the LD Heater
Three (3) copper wires of the type described above
must be provided to connect the heater control system to
the UC1 controller.
1. Remove the button plug from the hole on the right
side of the heater. The hole is located near the
front, just above the louver vent.
2. Connect the conduit to the side of the heater using
a conduit connector and nut.
3. Strip the insulation from each of the wires that will
lead to the UC1 controller about 1/2" from the end.
4. Locate the yellow wire installed on the transform-
er, the purple wire installed on the "TH" terminal
of the ignition control during the steps in Section
3.1.1 and the black wire connected to the "F2"
terminal on the ignition control.
5. Using the wire nuts provided in the kit, make the
following connections in the heater's vestibule (see
Figure 10, Wiring Diagram).
- Connect the black wire from "F2" on the igni-
tion control inside the heater to wire " a " of the
field constructed wire harness.
- Connect the yellow wire of the heater's trans-
former to wire " b " of the field constructed wire
harness.
- Connect the purple wire of the heater's ignition
control to wire " c " of the field constructed wire
harness.
3.3.2
Connections at the LJ Heater
Four (4) copper wires of the type described in Sec-
tion 3.3 must be provided to connect the heater control
system to the UC1 controller.
1. Remove the button plug from the hole on the right
side of the heater. The hole is located near the
front, just above the louver vent.
2. Connect the conduit to the side of the heater using
a conduit connector and nut.
3. Strip the insulation from each of the wires that will
lead to the UC1 controller about 1/2" from the end.
4. Locate the purple wire installed on the water
pressure switch, during the steps in Section 3.1.2
and the black wire connected to the high voltage
assembly that was cut and stripped.
5. Using the wire nuts provided in the kit, make the
