Background; Procedure - IBM Power775 Service Procedure

7.2

Background:

This document contains the procedure for filling a Disk Enclosure (DE) on an
Power 775 system with conditioned water using an
(FDT). The successful execution of a DE Pressure Test procedure is required for this
procedure to be performed.
Due to high packaging density and heat load, the
and contains internal plumbing to route cooling water towards and carry heat away from
critical power sub-components.
In the event that a new DE is to be added to a
tested for leaks and then filled with treated system water prior to installation into the
frame. All water cooled field replaceable units (FRU's), including DE's, are shipped
empty to the client location from IBM to eliminate the risk of damage from water
leakage.
Do not connect an empty DE to the system as this would cause a large volume of air to
be distributed throughout the system, resulting in increased component temperatures.
Filling a DE with the FDT prior to system connection prevents these conditions, and
purges the air from the DE through the use of a circulating water pump.
To ensure that the DE plumbing is leak free prior to installation, the DE must pass a DE
pressure test before the DE can be filled. A DE fill operation should not be performed
unless the DE pressure test has a passing result with a calibrated FDT.
Reference Information:
IBM
Power 775 FDT P/N:
Hose assemblies/adapters required:
Approximate DE water volume: 0.5 L
Expected time to fully fill DE with FDT: 30 s
NOTE: Some steps in this procedure may be redundant due to other service operations
being completed prior to this procedure. If a step has already been completed, verify
that the step has been completed properly and proceed to the next step.
NOTE: The location of the component for the fill procedure is not important. The fill
procedure can be completed with the component on a cart, on the lift tool, or
mechanically installed in the frame.
7.3

Procedure:

NOTE: If you already have the FDT powered on, proceed to Step 14.
start procedure at Step 1.
Power775 Disk Enclosure Chassis Service Procedure
---- Appendix C: DE Fill Procedure ----
45D6928
HA1 (45D8561)
HA2 (45D8562)
Page 94 of 171
IBM
Power 775 Fill and Drain Tool
IBM
Power 775 DE is water cooled,
IBM
Power 775 system, the DE must be
IBM
Otherwise,