Electrical Wiring - ECR EMI America Series Installation, Operation And Maintenance Manual

NOTICE
All electrical wiring must be run accord-
ing to NEC and local codes.
General requirements
WARNING
Electrical shock hazard
power is off before proceeding.
1. The standard unit voltage is 208/230V
(60Hz, 1Ph). Check the unit's rating plate
for your model's electrical requirements.
2. The wires should be capable of carry-
ing the maximum load current under
non-fault conditions at the stipulated
voltages.
3. Avoid large voltage drops on cable runs,
particularly in low-voltage wiring.
4. The correct cable size must be used to
ensure a voltage drop of less than 1 volt
in the control wiring.
5. Once the refrigeration pipe work is
complete, the electrical supply can be
connected.
6. Low-voltage wiring must be at least
18 awg.
Connect wiring
1. To access high-voltage wiring, loosen the
four screws on the front of the control
box cover. Then slide the cover up and off
(Figure 27, Page 22).
2. The rating plate is located on the out-
side of control box cover (Figure 27,
Page 22).
3. Each unit must have a separate branch
circuit protected by a fuse or breaker.
Check the rating plate for circuit ampacity
and breaker or fuse size. Use only HACR
type breakers. Select the proper wire for
the ampacity rating.
Comfort where it counts
CACG/CAHG & CACH/CAHH
• Installation, Operation and Maintenance Manual •

Electrical Wiring

— Make sure the
22
Removing control box cover
Figure 27
Electrical connections
Figure 28
low-voltage
connections
P/N 240007756, Rev. A [051509]
Air Handlers
rating plate
high-voltage cable
l2
l1
Ground lug
Ground wire