c) Since all the water is pumped into one supply line, there is less flexibility in zoning
the water distribution. The pump head may not be sufficient to deliver water to
zones of high pressure losses, e.g. at the furthest end of the pipe system.
Because of the importance of water flow balancing among all the parallel chillers,
the design of the header is very important.
Place the common pipe near the center of the header pipe. This will help to balance
the water distribution between the left and right sides of the header.
If the common pipe is at one end of the header, water from the branches at the
other end of the header will find more difficulty to flow into the common pipe.
Balancing valves must be installed at each supply branch to ensure adequate
water flow rate through each chiller unit.
2) Primary-Secondary System
header
Water will experience a higher
Resistance to flow to common pipe
From the furthest branches.
Secondar
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