8
ELECTRICAL
Verify the unit data plate voltage agrees with the power
supply. Route power and control wiring through the
utility entry. Do not run power and signal wires in the
same conduit. Connect power according to the (unit
specific) wiring diagram provided.
Protect the branch circuit in accordance with code re-
quirements. Control wires should not be run inside the
same conduit. The unit must be electrically grounded in
accordance with the current National Electric Code,
ANSI / NFPA No. 70. In Canada use current C.S.A.
Standard C22.1 Canadian Electric Code Part 1.
Power wiring is to the unit terminal block or main
disconnect. All wiring beyond this point has been done
by the manufacturer and cannot not be modified without
effecting the unit's agency / safety certification.
INSTALLATION continued
OUTSIDE AIR HOOD
CAUTION: Prior to unit operation, the outside air hood
must be opened as shown below:
AIRFLOW IS TO BE ADJUSTED AFTER
INSTALLATION TO OBTAIN AN AIR
TEMPERATURE RISE WITHIN THE RANGE
SPECIFIED ON THE RATING PLATE.
DUE TO JOB SPECIFICATION REVISIONS,
IT MAY BE NECESSARY TO ADJUST OR
CHANGE THE SHEAVE OR PULLEY TO
OBTAIN THE DESIRED AIRFLOW
AT THE TIME OF INSTALLATION.
Remove shipping screws from each side of the hood in the
"closed" postion. Lift hood to the "open" position, seal
flange and secure with sheet metal screws.
Air hoods may vary according to unit size and options.
The illustration shown is for practical guidelines for all
outside air hoods.
Outdoor air intake adjustments should be made accord-
ing building ventilation or local code requirements.
NOTE: All units are factory
wired for 208 / 230, 460 or
575 volt. If unit is to be
connected to a 208v supply,
the transformer must be
rewired for 208v service.
For 208v service interchange
the yellow and red conductor
on the low voltage control
transformer.
RED - BLK 208 volt ;
YEL - BLK 230 volt.
▲
!
CAUTION
START-UP TECHNICIAN MUST CHECK BLOWER
MOTOR AMPERAGE TO ENSURE THAT THE
AMPERAGE LISTED ON THE MOTOR NAMEPLATE
IS NOT EXCEEDED.
▲
On three phase units the rototation must be
checked on ALL MOTORS AND COMPRESSORS.
SCROLL COMPRESSORS ARE DIRECTIONAL.
Rotation must be checked on start-up by a
qualified service technician using
suction and discharge gauges.
Scroll compressors will FAIL if run in the wrong
direction. Blower and condenser rotation
should be checked and only be altered if
necessary at the power connection.
!
CAUTION
▲
!
WARNING
Electric shock hazard. Can cause injury or death.
Before attempting to perform any service or
maintenance, turn the electrical power to unit to
OFF at disconnect switch(es).
Unit may have multiple power supplies.
APPLY
SILICONE CAULKING
ON TOP &
BOTH SIDES
OF AIR HOOD
AIR HOOD SHOWN IN THE OPEN POSITION
