method to supply warm air is your responsibility. HP will advise on warm air alternatives; however, all references to warm air production are your responsibility during this procedure.

Cold weather power up checklist

Site electrical

Verify that all site POD critical IT feeder supply breakers are open.

Verify that all site Adiabatic mechanical feeder supply breakers are open. POD electrical

Service aisle—Verify that all site Adiabatic unit service disconnects are open.

Hot aisle—Verify that all IT power drop box breakers on the power tap boxes are open.

IMPORTANT: Following these steps prevent any possibility of energizing the IT load.

IT sections A and B:

a.Close all non-spare breakers and fuses within the control cabinet.

b.Close and latch the control cabinet.

c.Position the EPO system (on page 19) to Armed (white) or Bypass (green).

d.Verify that all EPO activation buttons are in the reset position (not depressed).

IT critical power feed cabinets A and B:

a.Close all non-spare breakers within primary A and B and secondary A and B power supply cabinets.

b.Close and lock electrical cabinet doors.

c.Close all Adiabatic power supply feeder breakers in both the primary mechanical and secondary mechanical cabinets.

d.Close and lock Adiabatic primary mechanical and secondary mechanical cabinets.

Standard power up procedure

Perform the following procedures in the exact order in which they are listed.

Electrical

Site electrical

1.Close all site POD critical IT power feeder supply breakers and monitor them for any effects that are not standard.

2.Close all site Adiabatic mechanical feeder supply breakers and monitor them for any effects that are not standard.

POD electrical

Close all of the site Adiabatic unit service disconnects in the service aisle.

Maintenance 81