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Unitary Products Group
FIGURE 3 – OUTDOOR UNIT CONTROL BOX (036, 048 & 060 MODELS)
GROUND LUG
REVERSIBLE
HIGH VOLTAGE CONDUIT PLATE
LOW VOLTAGE BOX
“FINGERED”
BUSHING
FAN MOTOR
PLUG
CONTACTOR
FAN CAPACITOR
FIGURE 4 – OUTDOOR UNIT CONTROL BOX (076 & 090 MODELS)
CONTACTOR 1
LOW VOLTAGE BOX
“FINGERED”
BUSHING
GROUND LUG
ADJUSTABLE
HIGH VOLTAGE CONDUIT PLATE
FAN MOTOR
PLUG
FAN CAPACITOR
POWER WIRING
CONNECTIONS
TRANSFORMER
CONTACTOR 2
(090 ONLY)
LOW VOLTAGE
Control wiring may vary, depending upon the type of ther-
mostat, furnace or air handler being connected.
Low voltage wiring diagrams can be found with the fur-
nace or air conditioning blower package installation in-
structions.
Pig–tail connector wires are provided from the low volt-
age pull–in coil on the contractor to a section of the con-
trol box. A “fingered” bushing is provided in the low volt-
age knockout hole. If 1/2” conduit is used for the low
voltage wiring, the bushing is to be removed.
1.
Route the low voltage cable through the fingered
bushing in the low voltage junction box. See Figure 3
or 4.
2.
Using wire nuts, connect the low voltage wiring as
shown in Figure 5, 6 or 7.
3.
A minimum of 18 AWG wire gauge for total lengths
not exceeding 130 feet must be used in connecting
the low voltage control wiring between the outdoor
unit, furnace and thermostat. For longer low voltage
control wiring lengths, consult the N.E.C.
Connect thermostat and control package wiring as
shown in Figure 5–7 and per the instructions packed with
those pieces.
