Carrier 38AU Installation, Start-Up And Service Instructions Manual page 19

Units Without Disconnect Option
C
11
Disconnect
L1
208/230-3-60
460-3-60
575-3-60
Units With Disconnect Option
L1
2
Optional
Disconnect
L2 4
Switch
L3
6
Disconnect factory test leads; discard.
Fig. 12 - - Power Wiring Connections
Affix the crankcase heater warning sticker to the unit
disconnect switch.
Convenience Outlets —
WARNING
!
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 opening unit for service. Locate
its disconnect switch, if appropriate, and open it.
Tag-out this switch, if necessary.
Two types of convenience outlets are offered on 38AU
models: Non-powered and unit-powered. Both types
provide a 125-volt GFCI (ground-fault circuit-interrupter)
duplex receptacle rated at 15-A behind a hinged
waterproof access cover, located on the end panel of the
unit. See Fig. 13.
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 building. Observe
national and local codes when selecting wire size, fuse or
breaker requirements and disconnect switch size and
location. Route 125-v power supply conductors into the
bottom of the utility box containing the duplex receptacle.
Unit-powered type: A unit-mounted transformer is
factory-installed to stepdown the main power supply voltage
to the unit to 115-v at the duplex receptacle. This option also
includes a manual switch with fuse, located in a utility box
TB1
13
per
NEC
L2 L3
1
Factory
3
Wiring
5
C10204
and mounted on a bracket behind the convenience outlet;
access is through the unit's control box access panel. See
Fig. 13.
Convenience
Outlet
GFCI
Pwd-CO
Fuse
Switch
Control Box
Access Panel
Fig. 13 - - Convenience Outlet Location
The primary leads to the convenience outlet transformer are
not factory-connected. Selection of primary power source is
a customer-option. If local codes permit, the transformer
primary leads can be connected at the line-side terminals on
the unit-mounted non-fused disconnect switch; this will
provide service power to the unit when the unit disconnect
switch is open. Other connection methods will result in the
convenience outlet circuit being de-energized when the unit
disconnect is open. See Fig. 14.
UNIT CONNECT
VOLTAGE AS CONNECTIONS
208, L1: RED + YEL
230 240 L2: BLU + GRA
L1: RED
Splice BLU +
460 480
YEL
L2: GRA
L1: RED
575 600
L2: GRA
Fig. 14 - - Powered Convenience Outlet Wiring
The unit-powered convenience outlet has a 1000 VA rated
transformer. Maximum continuous current must not
exceed 8 Amps.
19
Pwd-CO
Transformer
C10205
C10206
PRIMARY TRANSFORMER
TERMINALS
H1 + H3
H2 + H4
H1
H2 + H3
H4
H1
H2