USER GUIDE
PF-2223-1
3-Phase 22.5kW Power System
PF-2223-1-UG-01
Page 8 of 12
June 2015
Power Shelf Slots
(as viewed from front of Power Shelf left to right)
Phase A Input Power
PSU1-A
PSU2-A
PSU3-A
Phase B Input Power
PSU1-B
PSU2-B
PSU3-B
PSU4-B
Phase C Input Power
PSU1-C
PSU2-C
PSU3-C
If all 10 slots in the Power Shelf are not used, populate the appropriate slots so that each phase has an
equal number of PSUs or is within 1 PSU of the max on a single phase. For example, if a total of 7 PSUs are
used, then the phase breakout should be 3, 2, and 2. Cover any unused slot with a provided slot cover.
Also, consider the load on the C13 receptacles when balancing phases.
As shown below, PSUs are held in place with a spring latch.
To install a Power Supply Unit:
1.
Slide a PSU into an empty slot of the Power Shelf until it clicks into place. Both lights on the PSU
illuminate green to indicate that it is operational. Refer to “Power Supply Unit LED Status” on
page 8 for more information on the PSU LED status.
2.
Slide the remaining PSUs into the empty slots in the Power Shelf until they click into place.
To remove a Power Supply Unit:
•
Lift the spring latch on the front of a PSU, pull the handle, and slide the PSU out from the Power
Shelf.
Power Supply Unit LED Status
Under normal operating conditions, both indicator lights LED 1 and LED 2 illuminate solid green; the table
below shows other LED combinations and status.
Spring Latch
