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Example manifold supply pipe sizes
v Use a 50.8 mm (2 in.) or larger supply pipe to provide the correct flow to three
v Use a 63.5 mm (2.50 in.) or larger supply pipe to provide the correct flow to four
v Use an 88.9 mm (3.50 in.) or larger supply pipe to provide the correct flow to
To stop the flow of water in individual legs of multiple circuit loops, install shutoff
valves for each supply and return line. This provides a way to service or replace an
individual heat exchanger without affecting the operation of other heat exchangers
in the loop.
To ensure that water specifications are being met and that the optimum heat
removal is taking place, use temperature and flow metering (monitoring) in
secondary loops.
Anchor or restrain all manifolds and pipes to provide the required support and to
avoid movement when quick-connect couplings are being attached to the manifolds.
Figure 9 shows another layout for multiple water circuits.
Figure 9. Typical central manifold (at a central location for multiple water circuits)
20
Rear Door Heat eXchanger V2: Installation and Maintenance Guide
19 mm (0.75 in.) supply hoses, with a 100 kW coolant distribution unit (CDU).
19 mm (0.75 in.) supply hoses, with a 120 kW CDU.
nine 19 mm (0.75 in.) supply hoses, with a 300 kW CDU.
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