Data Aire DAFC-11 Manual de instalación descargar pdf (Pagina 12)

2.1.6 Field Piping, Remote Condensing Unit

2.2 Water/Glycol Unit Piping

The required ﬁ eld installed condenser water pipe sizes may or may not be the same as the con-

nections at the evaporator section or ﬂ uid cooler (refer to Sections 2.2.2 and 2.2.3 for connection

sizes). Water pipe sizes will depend on the length of pipe required and the calculated pressure drop

of peripheral components.

Water cooled units may be connected to building water or tower water sources. Pipe size will de-

pend 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 connec-

tions 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 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 strainer and water/glycol piping must be cleaned on a periodic

basis. If the unit is shipped with optional shell and tube condenser, strainers are not required or

shipped with the unit.

All water pipes have a cap installed on the end of the pipe for pressure testing the system. These

caps need to be removed before installing the piping to the units. Use a tube cutter for smaller pipes

and a reciprocating saw with a metal cutting blade for larger pipe sizes or if there is a clearance

problem. All connections need to be cleaned before connections are brazed together.

NOTE: One of the most common problems in a water/glycol system is the presence of

air in the condenser loop. Air vents must be installed in various locations in the piping

system to purge the air.

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Data Aire DAFC-11 Manual de instalación Pagina 12