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Ensure supplied electrical power is of the correct voltage, current and phase and that electrical connections are properly sized and
suitable for the intended application. All connections to the unit must conform to local electrical codes and standards. If the unit
has an installed service switch, be sure that it is wired correctly to the fan motor. Do not install electrical power to the unit unless
the service switch is in the off position. If there is no connection, ensure that the breaker supplying voltage to the unit is in the off
position.
Service Switch Wiring Diagram
The service switch should always be mounted within visible sight of the unit, and if at all possible, it should be mounted on the unit
itself.
ELECTRICAL CONNECTIONS
Warning: follow state and local electrical codes
WARNING
Single Phase
Belt Drive
LINE IN
115/208/230/277 volt, single phase
SERVICE SWITCH
115/208/230/277 volt
Single phase
115/208/230/277 volt
Single phase
Service switch is mounted to fan housing
MOTOR
Three Phase
Belt Drive
LINE IN
208/230/460/575 volt, three phase
SERVICE SWITCH
208/230/460/575 volt
Three phase
208/230/460/575 volt
60 cycle, three phase
Service switch is mounted to fan housing
MOTOR
Three Phase with
Variable Frequency Drives
Belt Drive
LINE IN
208/230/460/575 volt, three phase
SERVICE SWITCH
208/230/460/575 volt
Three phase
208/230/460/575 volt
60 cycle, three phase
Service switch is mounted to fan housing
VFD
supplied and wired
by others
MOTOR
