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036-21366-007-A-1205
32 Unitary Products Group
TYPICAL WIRING DIAGRAM NOTES
1. All field wiring to be accomplished following city, local
and/or national codes in effect at time of installation of
this unit.
2. Caution: Label all wires prior to disconnection when ser-
vicing controls. Wiring errors can cause improper and
dangerous operation if any of the wire as supplied with
this unit must be removed it must be replaced with type
105°C, 600V wire or equivalent clearly renumbered for
identification. Verify proper operation after servicing.
3. Motors are inherently protected.
4. See unit nameplate for maximum fuse size and minimum
circuit ampacity.
5. Select indoor blower cooling speed from unit wiring dia-
gram Table 1. Heating speed is preset at the factory.
6. If both LR and ASCT are present, wire 801/BL and 805/
BL are connected to ASCT-3 if LR only is present wire
801/BL and 805/BL are connected to M1 coil. If ASCT
only is present wire 202/Y is connected to ASCT-3. If
neither LR or ASCT are present, Wire 202/Y is connect
to M1 coil.
7. Shunt contact also used with crankcase heater.
(Optional).
FIGURE 21 - TYPICAL WIRING DIAGRAM LEGEND
Open all disconnects before servicing this unit.
ALS
ASCT
COMPR
EAC
FS
HP
HSP
HUM
LP
LR
LS
M1
M2
PS
RC1/RC2
RS
T1
T2
TB2
ELECTRIC AIR CLEANER RELAY OUTPUT
LEGEND :
AUXILLARY LIMIT SWITCH
ANTI-SHORT CYCLE TIMER
(OPTIONAL ACCESSORY)
COMPRESSOR
ON CONTROL BOARD, 24-1-60, 18VA MAX.
FREEZESTAT SWITCH (OPTIONAL ACCESSORY)
OPEN @ 25
0
F
HIGH PRESSURE SWITCH (OPTIONAL
ACCESSORY) OPENS @ 380 PSIG
HOT SURFACE TO PILOT
HUMIDIFER RELAY OUTPUT ON CONTROL
BOARD, 24-1-60, 18VA MAX.
LOW PRESSURE SWITCH (OPTIONAL ACCESSORY)
OPEN @ 7 PSIG
LOCK OUT RELAY (OPTIONAL ACCESSORY)
LIMIT SWITCH
CONTACTOR, COMPR. & O.D.FAN
CONTACTOR, DRAFT INDUCER MOTOR
PRESSURE SWITCH MAKES @
.193 IWC NOM. (.33 IWC MAX.)
COMPR. START & OUTDOOR FAN RUN CAPACITOR
ROLL OUT SWITCH
TRANSFORMER, 24V, 40VA
TRANSFORMER, 480/240 VOLT
TERMINAL BLOCK, 24V, I.D.
MOTOR "SPEED" CONNECTION
IDENTIFIED TERMINAL ON CAPACITOR
FIELD WIRING
DNP LEGEND WIRING DIA.
ROOM THERMOSTAT 24V CONNECTIONS
TB1 ON CONTROL BOARD
FACTORY WIRING AND DEVICES
OPTIONAL WIRING AND DEVICES