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64
System Start-Up
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before
servicing. Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
C. Interchange any two of the field connected main power wires at the unit cir-
cuit breaker (1CB1).
Note: Interchanging "Load" side power wires at the fan contactors will only
affect the individual fan rotation. Ensure that the voltage phase sequence at
the main terminal block 1TB1 or the factory mounted disconnect switch 1S14
is ABC as outlined in the "Electrical Phasing" section.
If some of the fans are rotating backwards;
A. Press the STOP key at the Human Interface Module in the unit control pan-
el to stop the fan operation.
B. Open the field supplied disconnect switch upstream of the unit. Lock the
disconnect switch in the open position while working at the unit.
C. Interchange any two of the fan motor leads at the contactor for each fan
that is rotating backwards
CSRA-SVX02A-EN
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