Water Coil Piping - Trane Performance Climate Changer PSCA Installation, Operation And Maintenance Manual

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Water Coil Piping

Type 5A, 5W, D1, W, UW, TT, P,2, P4, and P8 water coils are

self-venting only if the water velocity exceeds 1.5 feet per

second (fps) in the coil tubes. Type D2, UA, UU, and WD

water coils are self-venting only if the water velocity

exceeds 2.5 fps in the coil tubes. See the unit submittals for

coil water velocity. If the water velocity is below these

minimums, vent the coil by one of the following methods:

1. Install an air vent in the top pipe plug tapping of the

return header.

2. When the return line rises above the top of the coil,

vent from the top of the return header horizontally to

the return piping.

Note: TT coils are designed with larger than normal end

tube sheet holes to allow for maximum expansion.

Air leakage around tubes should be expected and

handled by capping over coil ends or by sealing

around tubes with a pliable sealant such as

silicone.

Figure 61. Typical piping for type 5W one-row water

coil

Drain

Figure 62. Typical piping for type 5A, 5W two-row, W 3-

to 12-row, WD, D1, and D2 water coils

Drain

CLCH-SVX013B-EN

Figure 63. Typical piping for stacked water coils

Water supply

main

Water

return main

Piping and Connections

Drain

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