21
FIRE HAZARD
Failure to follow this warning could cause in personal
injury, death and/or equipment damage.
Do not connect aluminum wire bet we en disconnect
switch and condensing unit. Use only copper wire.
(See Fig. 13.)
!
WARNING
COPPER
WIRE ONLY
ELECTRIC
DISCONNECT
SWITCH
ALUMINUM
WIRE
A93033
Fig. 13 -- Disconnect Switch and Unit
Units with Factory-Installed Non--Fused Disconnect —
The factory-installed option disconnect switch is located
in a weatherproof enclosure locat ed under the main
control box. The manual switch handle is accessible
through an opening in the access panel.
Un its W ith out Fact ory-I nst alled No n--Fused D iscon nect —
When installing units, provide a disconnect switch per NEC
(National Electrical Code) of adequate size. Disconnect
sizing data is provided on the unit informative plate. Locate
on unit cabinet or within sight of the unit per national or
local codes. Do not cover unit informative plate if mounting
the discon nect on the unit cabinet.
All Units —
All field wiring must comply with NEC and all local
codes. Size wire based on MCA (Minimum Circuit Amps)
on the unit i nformative plate. See Fig. 14 for power wiring
connec tions t o the unit contactor and terminal block and
equipment ground.
Provide a ground-fault and short-circuit over-current
protection device (fuse or breaker) per NEC Article 440
(or loca l codes). Refer to unit informati ve data plate for
MOCP (Maximum Over-current Protection) device size.
All units except 208/230-v units a re factory wired for the
voltage shown on the nameplate. If the 208/230-v unit is
to be connected to a 208-v power supply, the control
transformer must be rewired by moving the black wire
with the
-in. female spade connector from the 230-v
connec tion and moving it t o the 208-v
-in. male
terminal on the primary side of the transformer. Refer to
unit label dia gram for line-side information.
Affix the crankcase he ater warning sticker to the unit
disconnec t switch.
11 13
L1
L2 L3
CTB1
208/230-3-60
460-3-60
575-3-60
Units Without Disconnect Option
Units With Disconnect Option
2
4
6
1
3
5
L1
L2
L3
Optional
Disconnect
Switch
Disconnect factory test leads; discard.
Factory
Wiring
Disconnect
per
NEC
C10204
Fig. 14 -- Power Wiring Connections
Convenience Outlets —
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Units with convenience outlet circuits may use
multiple disconnects. Check convenience outlet for
power status before ope ning unit for service. Locate
its disconnect switch, if appropriate, and open it.
Tag-out this switch, if necessary.
!
WARNING
Two types of convenience outlets a re offered on 38AU
models: Non-powere d and unit-powered. Both types
provide a 125-volt GFCI (ground-fault circ uit-interrupte r)
duplex receptacle rated at 15-A behind a hinged
waterproof access cover, located on the end panel of the
unit. See Fig. 15.
Non-powered type: This type requires the field
installation of a general-purpose 125-volt 15-A circuit
powered from a source elsewhere in the bui lding. Observe
national and local codes when selecting wire size, fuse or
breake r require ments and disconnect switch size and
loca tion. Route 125-v power supply conductors into the
bottom of the utility box containing the duplex receptacle.
Maximum continuous current for this type of convenience
outlet (non--unit powered) must not exc eed 8 Amps.
38AU
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