IBM Rear Door Heat eXchanger V2, Installation And Maintenance Manual

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Figure 8 shows an example of a water chiller unit that supplies conditioned water to
one or more heat exchangers. This must be a closed system (no exposure of the
water to air) and meet all materials, water quality, water treatment, and temperature
and flow specifications that are defined in this document. A water chiller unit is
considered an acceptable alternative to use as a building chilled water source for
removing heat from an IBM Rear Door Heat eXchanger.
Manifolds and piping: Manifolds that accept large-diameter feed pipes from a
pump unit are the preferred method for splitting the flow of water to
smaller-diameter pipes or hoses that are routed to individual heat exchangers.
Manifolds must be constructed of materials that are compatible with the pump unit
and related piping. See “Materials to use in secondary loops” on page 12. The
manifolds must provide enough connection points to allow a matching number of
supply and return lines to be attached, and the manifolds must match the capacity
rating of the pumps and the loop heat exchanger (between the secondary cooling
loop and the building chilled-water source). Anchor or restrain all manifolds to
provide the required support to avoid movement when quick-connect couplings are
connected to the manifolds.
Rear door
heat exchangers
T
Return
Distribution
manifolds
Flexible hoses,
maximum length
15.24 meters (50 feet)
Pressure relief
valve (based on
maximum
pressure
application)
Supply
CS
CS
CS
CS
CS
Secondary side
temperature feedback
for controlled water
temperature to
specification
Supplier-built water chiller
unit required features:
- Temperature and flow metering (monitoring)
- Leak detection or water level sensing and shutdown
- Local and remote monitoring and control
- Access port for filling and water treatment
Return
Supply
CS
CS
Shutoff
valves
Circuit setter
flow control
valves
Optional low
impedance
quick-connect
coupling
Quick-connect
couplings
Flowmeter
FM
Figure 8. Coolant distribution unit that uses a water chiller unit to provide conditioned water
Chapter 2. Heat exchanger planning, specifications, and requirements
19