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4.5 Voltage Requirements
All XDF systems require two input power circuits. Each power cord is 10 feet (3m) long. For the full load
amp requirements of each option, refer to 12.1 - Optional Power Systems or the component’s user
manual.
4.5.1 Voltage Input Requirements
The first input connection provides power—120V-1ph-60Hz, line-to-neutral—to the controls, evapora-
tor fans and condenser fan. This input’s power cord has a NEMA 5-15P plug. This power cord should
be connected to a UPS-protected power source.
The second input connection on 60Hz XDF units provides power—208V-3ph-60Hz, with neutral—to
the compressor, optional condensate pump and an alternate connection for the condenser fan. (The
alternate connection for the condenser fan permits reducing the load on the UPS-protected power
source.) The 208V power cord has a NEMA L21-30P locking plug.
Changing Condenser Fan Power Source—Self-Contained, Air Cooled Units
To change the power source connections:
1. Open the front door panel and look for two screws with Torx heads that secure the hinged corner
panel. The Torx-head screws are on the front doorjamb.
2. Extract the two screws and swing the panel open.
3. Remove the protective covering over the electrical connections (see Figure 18). The cover is
secured with two screws.
4. Find the connectors (see Figure 18) and pull apart the snap connection made at the factory.
5. Connect the alternate power source connector to the supply that feeds the condenser fan.
6. Reinstall the protective cover over the electrical connections.
7. Close the outer panel and reinsert the two Torx screws.
8. Close the front door.
Figure 18 Alternate condenser fan power connection
!
WARNING
Risk of electric shock. Can cause death or injury.
Disconnect all local and remote electric power before working within and/or installing
equipment.
Protective cover
over high voltage
electrical
connections
Alternate circuit
connector to
condenser fan
Power supply
to condenser fan
Default circuit connector
(connection made
at factory)