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V.
ELECTRICAL WIRING
ROUTING 48 VDC Wiring
Following Airxcel's high voltage wiring specifications and
all local and national electrical codes, route the 48 VDC
supply wiring from its power source to the rooftop unit.
High Voltage Wiring Specifications based on Minimum
Overcurrent Protective Device Amperage – (see upper
unit nameplate)
1.
U.L. requires copper conductors only with minimum
#10 AWG when using the minimum recommended
overcurrent protection device. Higher rated devices
or longer wiring runs will require #8 AWG or greater
copper conductors.
2.
To prevent voltage drops greater than 10% during
starting loads, adhere to the following guideline:
For lengths greater than 50', use #8 AWG or larger
copper conductors. Match to the overcurrent
protection device provided.
Circuit Protection – Refer to upper unit nameplate.
Electrical Wiring High Voltage Wiring Specification is
based on Overcurrent Protection Device rated higher
than the minimum required (see upper unit nameplate).
Follow all local and NEC (National Electrical Code) for
proper sizing of wire AWG based on Overcurrent
Protection Device selected and the length of the wiring
run to the Air Conditioner.
DANGER – SHOCK HAZARD
MAKE SURE THAT ALL POWER SUPPLY TO
THE
UNIT
IS
PERFORMING ANY WORK ON THE UNIT TO
AVOID THE POSSIBILITY OF SHOCK INJURY
OR DAMAGE TO THE EQUIPMENT.
SNAP TOGETHER THE UNIT CONNECTOR
WITH THE SUPPLY CONNECTOR.
THE SUPPLY CONNECTOR SHOULD BE SMH
SY Series 50A 600V.
6
DISCONNECTED
BEFORE
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