Coil Piping and Connections
CLCH-SVX009L-EN 41
Water Coil Piping
Figure 46 and Figure 47 illustrate typical water coil piping
configurations.
Water coils are self-venting only if the water velocity exceeds
1.5 feet per second (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.
Figure 46. Typical piping for one-row water coil
Drain
Airflow
Level
Water return main
AV
Water supply main
GV
AV
GV
GV
Figure 47. Typical piping for 2 - 8-row water coils
Water return main
Water supply main
GV
AV
AV
AV
Drain
Airflow
Pitch down
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