Specifications

11
2.2 Water/Glycol Cooled Unit Piping
The required fi led installed fl uid cooler pipe sizes may or may not be the same as the
connection sizes at the fl uid cooler. (Refer to 2.2.2 and 2.2.3 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.
Shut-off 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. Drain/fi ll valves should be
located at the lowest point on the connected piping.
All water/glycol cooled 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 shell and tube condensers, strainers are not required nor
shipped with unit.
One of the most common problems is a water/glycol system is the presence of air in the
condenser water loop. Air vents must be installed in various locations in the piing 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 manufacturers guidelines.
2.1.6 Field Piping, Remote Condensing Unit
One Circuit Shown