
4.2
Non-Spring Returned Preconditioner Water Valve Actuator
Replacement
4.2.1
Remove a Non-Spring Returned Preconditioner Water Valve Actuator
Prerequisites
Tools Required:
Diagonal cutter
Tie straps
Balldriver Set, 11 Piece 5/64-3/8"
Phillips screwdriver
Time Required:
15 minutes
About this task
CAUTION:
●
Equipment damage
●
Cray recommends performing this procedure on a powered down cabinet. If performed on a powered
up cabinet, the procedure must be completed within 15-20 minutes to prevent possible system EPO
and/or condensation.
Procedure
1. Power down all of the cabinets in the row.
a. Enter the following command in a terminal window on the SMW:
smw$
xtcli power down Hostname
Hostname
is the cabinet, system, or partition ID; examples include
c0-0
(for a cabinet),
S0
(for a
system), or
p0
(for a partition).
b. For cabinets, place main circuit breakers CB1 and CB2 in the OFF (down) position.
c. For blower cabinets, place the MAIN DISCONNECT switch on the rear panel of the blower cabinet PDU
in the OFF (down) position.
Preconditioner Cabinet Procedures
106