Convenience Outlets - Carrier 48TC 04 Series Service And Maintenance Instructions

CONVENIENCE OUTLETS

WARNING
!
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Units with convenience outlet circuits can 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 48TC
models: Non- - powered and unit- - powered. Both types
provide a 125- - volt
circuit- - interrupter) duplex receptacle rated at 15- - A
behind a hinged waterproof access cover, located on the
end panel of the unit. See Fig. 41.
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.
CONVENIENCE
OUTLET GFCI
Fig. 41 - - Convenience Outlet Location
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 and mounted on a bracket behind the
convenience outlet; access is through the unit's control
box access panel. See Fig. 41.
GFCI (ground- - fault
PWD-CO TRANSFORMER
PWD-CO FUSE
SWITCH
CONTROL BOX
ACCESS PANEL
C08128
UNIT CONNECT PRIMARY
VOLTAGE AS CONNECTIONS
208, L1: RED +YEL
240
230 L2: BLU + GRA
L1: RED
Splice BLU + YEL
460 480
L2: GRA
L1: RED
575 600
L2: GRA
Fig. 42 - - Powered Convenience Outlet Wiring
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 a
disconnect or HACR breaker switch; this will provide
service power to the unit when the unit disconnect switch
or HACR switch is open. Other connection methods will
result in the convenience outlet circuit being de- - energized
when the unit disconnect or HACR switch is open. See
Fig. 42.
Duty Cycle: The unit- - powered convenience outlet has a
duty cycle limitation. The transformer is intended to
provide power on an intermittent basis for service tools,
lamps, etc; it is not intended to provide 15- - amps loading
for continuous duty loads (such as electric heaters for
overnight use). Observe a 50% limit on circuit loading
above 8- - amps (i.e., limit loads exceeding 8- - amps to 30
minutes of operation every hour).
GFCI Maintenance: Periodically
receptacle by pressing the TEST button on the face of the
receptacle.
1. Press the TEST button on the face of the GFCI
receptacle. This should cause the internal GFCI
circuit to trip and open the receptacle.
2. Inspect for proper grounding and power line phasing
should the GFCI receptacle fail to trip.
3. Repair ground wire connections as needed and
correct line phasing.
36
C08283
TRANSFORMER
TERMINALS
H1 + H3
H2 + H4
H1
H2 + H3
H4
H1
H2
unit- - mounted non- - fused
test the GFCI