Figure 7 shows an example of an off-the-shelf modular coolant distribution unit. The
actual number of heat exchangers that are connected to a secondary loop depends
on the capacity of the coolant distribution unit that is running the secondary loop.
Rear door
heat exchangers
T
Return
Distribution
manifolds
Flexible hoses,
maximum length
15.24 meters (50 feet)
Supply
CS
CS
CS
CS
CS
Secondary side
temperature feedback
for controlled water
temperature to
specification
Supplier-built coolant distribution
unit (CDU) suggested 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
Building
chilled
water
FM
Flowmeter
Optional low
impedance
quick-connect
coupling
Quick-connect
couplings
Pressure relief
valve (based on
maximum
pressure
application)
Figure 7. Coolant distribution unit that uses off-the-shelf supplier solutions
18
Rear Door Heat eXchanger V2: Installation and Maintenance Guide
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