280241-YIM-D-0909
Johnson Controls Unitary Products 37
TYPICAL WIRING DIAGRAM NOTES
(SEE FIGURES 18 THRU 31)
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 inherently protected.
4. Factory wired for 460 Volt operation.
5. See unit nameplate for maximum fuse size and/or circuit
breaker size and minimum circuit ampacity.
6. If both LR and ASCT are present, wire 801/BL and 805/
BL are connected to ASCT-3. If only LR is present wire
801/BL and 805/BL are connected to M1 coil. If only
ASCT is present wire 202/Y is connected to ASCT-3. If
neither LR or ASCT are present, wire 202/Y is connected
to M1coil as shown.
7. Removed.
8. Select indoor blower speed to remain within the temper-
ature rise range on the nameplate in heating and to
obtain approximately 400 CFM / TON in cooling.
FIGURE 32 - TYPICAL WIRING DIAGRAM LEGEND
Open all disconnects before servicing this unit.
LEGEND
ALS AUXILARY LIMIT SWITCH
ASCT ANTI-SHORT CYCLE TIMER (OPTIONAL)
CB CIRCUIT BREAKER
CCH CRANK CASE HEATER (OPTIONAL)
COMPR COMPRESSOR
DM DRAFT MOTOR
EMCB ELEC, MOTOR CONTROL BOARD
GND GROUND
FS FREEZE STAT SWITCH (OPTIONAL)
HP
HIGH PRESSURE SWITCH OPENS @ 625 PSIG (R410A) / 380
PSIG (R22)
IDFAN INDOOR FAN MOTOR
LP LOW PRESSURE SWITCH OPENS @ 7 PSIG
LS LIMIT SWITCH
LR LOCK OUT RELAY (OPTIONAL)
M1 CONTACTOR, COMPR. AND OD FAN
ODFAN OUTDOOR FAN MOTOR
PS PRESSURE SWITCH
RC1 / RC2 COMPRESSOR START & OUTDOOR FAN RUN CAPACITOR
RS ROLLOUT SWITCH
TB1 TERMINAL BLOCK
T1 TRANSFORMER, 24V, 240V
T2 TRANSFORMER, 240V, 460V
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