Table of Contents
Advertisement
Fig. 25 - - Handle and Shaft Assembly for HACR
Units Without Factory- - Installed
Non- - Fused Disconnect or HACR —
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. 16 and unit label diagram for
power wiring connections to the unit and equipment ground.
Maximum wire size is #4 ga AWG (copper only) per pole
on contactors and #2 ga AWG (copper only) per pole on
optional non- - fused disconnect or HACR.
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.
NOTE: Units ordered with factory- - installed HACR do
not need an additional ground- - fault and short- - circuit
over- - current protective device unless required by local
codes.
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.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate. See Tables
18 and 19. On 3- - phase units, voltages between phases must
be balanced within 2% and the current within 10%. Use the
formula shown in the legend for Tables 18 and 19, Note 3
(see page 60) to determine the percent of voltage imbalance.
Operation on improper line voltage or excessive phase
imbalance constitutes abuse and may cause damage to
electrical components. Such operation would invalidate any
applicable Carrier warranty.
NOTE: Check all factory and field electrical connections
for tightness.
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
C12281
before opening unit for service. Locate its disconnect
switch, if appropriate, and switch to off position.
Lock- - out and tag- - out this switch, if necessary.
Two types of convenience outlets are offered on 50LC 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. 26.
Installing
while-in-use cover for the factory-installed convenience
outlets is now required by UL standards. This cover
cannot be factory-mounted due its depth; it must be
installed
convenience outlet is covered with a blank cover plate.
The weatherproof cover kit is shipped in the unit's control
box. The kit includes the hinged cover, a backing plate
1
/
-in. male
and gasket.
4
DISCONNECT
CONVENIENCE
TAG- - OUT ALL POWER.
Remove the blank cover plate at the convenience outlet;
discard the blank cover.
Loosen the two screws at the GFCI duplex outlet, until
approximately
exposed. Press the gasket over the screw heads. Slip the
20
WARNING
!
Convenience
Outlet
GFCI
Pwd-CO
Fuse
Switch
Control Box
Access Panel
Fig. 26 - - Convenience Outlet Location
Weatherproof
Cover:
at
unit
installation.
ALL
POWER
OUTLET.
1
/
-in. (13 mm) under screw heads are
2
Pwd-CO
Transformer
C08128
A
weatherproof
For
shipment,
the
TO
UNIT
AND
LOCK- - OUT
AND
- Quick Links:
- Table of Contents
Hide quick links:
Advertisement
Table of Contents
