Water/Glycol Cooled Unit Piping - Data Aire LCS Installation, Operation And Maintenance Manual

2.2

Water/Glycol Cooled Unit Piping

The required fi eld installed condenser water pipe sizes may or may not be the same as the connection
sizes at the evaporator or fl uid cooler. (Refer to 2.1.4 for connection sizing.) This will depend on the
length of pipe and the calculated pressure drop of peripheral components.
Water cooled units may also be connected to building water or tower water sources. Pipe size will
depend on length of run and the maximum water fl ow required.
Shutoff valves, fi eld provided, should be installed within a few feet of the inlet and outlet connections
of the evaporator to allow the unit to be isolated for service. There should be a means of draining the
unit for service. Drain/fi ll valves should be located at the lowest point on the connected piping.
All water/glycol units are shipped with plate/fi n heat exchangers as standard equipment. A strainer
is shipped loose and is to be fi eld installed in the supply line with shut-off valves, fi eld provided,
before and after the strainer. The strainers and water/glycol piping must be cleaned on a periodic
basis. If the unit is shipped with an optional shell and tube condenser, stainers are not required nor
shipped with the unit.
One of the most common problems in a water/glycol system is the presence of air in
the condenser water loop. Air vents must be installed in various locations in the piping
system to purge the air.
Glycol system piping may include a centrifugal pump (or pumps for redundancy). Pumps must be
primed before operating per the pump manufacturer's guidelines.
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(Field Provided)