Carrier 50HT-A07 Installation Instructions Manual page 14

Units Without Disconnect Option
C
11 13
Disconnect
per
NEC
208/230-1-60
Units With Disconnect Option
2
L1
Optional
4 Disconnect
L2
6
L3
Disconnect factory test leads; discard.
Fig. 19 - - Power Wiring Connections
Units With Factory- - Installed Disconnect —
The factory- - installed option disconnect switch is located
in a weatherproof enclosure located under the main
control box. The manual switch handle is accessible
through an opening in the access panel.
factory test leads (see Fig. 19).
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in
intermittent operation or performance satisfaction.
Do not connect aluminum wire between disconnect
switch and 50HT unit. Use only copper wire.
(See Fig. 20.)
ELECTRIC
DISCONNECT
SWITCH
WIRE ONLY
ALUMINUM
Fig. 20 - - Disconnect Switch and Unit
C IFC
or
(1-ph
11 13 13
TB
IFM)
Disconnect
per
NEC
L1
L2 L3
208/230-3-60
460-3-60
375-3-60
575-3-60
1
Factory
3
Wiring
Switch
5
C07494
Discard the
COPPER
WIRE
A93033
Units Without Factory- - Installed Disconnect —
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 disconnect 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 informative plate. See Fig. 19 and the unit
label diagram for power wiring connections to the unit
power terminal blocks and equipment ground. Maximum
wire size is #2 ga AWG per pole.
Provide a ground- - fault and short- - circuit over- - current
protection device (fuse or breaker) per NEC Article 440
(or local codes). Refer to unit informative data plate for
MOCP (Maximum Over- - current Protection) device size.
All field wiring must comply with the NEC and local
requirements.
All units except 208/230-v units are 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
1
with the / -in. female spade connector from the 230- - v
4
connection and moving it to the 200-v
terminal on the primary side of the transformer. Refer to
unit label diagram for additional information. Field power
wires will be connected line- - side pressure lugs on the
power terminal block or at factory- - installed option
non- - fused disconnect.
NOTE: Check all factory and field electrical connections
for tightness. Field- - supplied wiring shall conform with
the limitations of 63_F (33_C) rise.
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 50HT
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. 21.
14
1
/ -in. male
4
GFCI (ground- - fault