22
Electrical
The single point electrical power connections are made in the electrical control compartment.
Verify the unit nameplate agrees with the power supply. Connect power and control field wiring as
shown on the unit wiring diagram provided with the unit.
Table 4 - Nameplate Voltage Markings & Tolerances
Hz
Nameplate
Voltage
Nominal
System
Voltage
Operating Voltage
Range
1
Acceptable
Performance Range
2
Min
Max
Min
Max
60
115
120
104
127
108
126
208/230
208/240
187
254
187
252
208
208
187
228
187
228
230
240
208
254
216
252
265
277
240
293
249
291
460
480
416
508
432
504
575
600
520
635
540
630
50
230
230
198
254
208
254
400
400
344
440
360
440
Notes:
1.
Operating voltage is the min and max voltage for which the unit can function. Never
operate outside of this min and max voltage.
2.
The Acceptable Performance Range is the min and max voltage for which the unit
performance is designed and rated to give acceptable performance.
Route power and control wiring, separately,
through the utility entry. Do not run power and
signal wires in the same conduit.
Size supply conductors based on the unit MCA
rating. Supply conductors must be rated a
minimum of 167°F (75°C).
Protect the branch circuit in accordance with code
requirements. The unit must be electrically
grounded in accordance with local codes, or in the
absence of local codes, the current National
Electric Code, ANSI/NFPA 70 or the current
Canadian Electrical Code CSA C22.1.
NOTE:
Units are factory wired for 208V, 230V,
460V, or 575V. In some units, the 208V and 230V
options may also be provided in single or three
phase
configurations.
The
transformer
configuration must be checked by a qualified
technician prior to startup.
ELECTRIC SHOCK
Electric
shock
hazard.
Before
attempting to perform any installation,
service, or maintenance, shut off all
electrical power to the unit at the
disconnect switches. Unit may have
multiple power supplies. Failure to
disconnect power could result in
dangerous operation, serious injury,
death or property damage.
WARNING
