Water Coil Piping; Refrigerant Coil Piping - Trane BCHE Installation, Operation And Maintenance Manual

Water Coil Piping

Water coils are self-venting only if the water velocity
exceeds the minimum required velocity.
The following combinations of unit size and number of rows
have a coil with a minimum self-venting velocity of 1 feet
per second (fps).
Unit Size
18
36
Figure 47. Typical piping for one-row water coil

Refrigerant Coil Piping

Note: Refer to for information on handling refrigerants.
BCX-SVX002A-EN
# Rows
8
6,8
AV
AV
Drain
Unit Size
54
72
90
120
All other unit size and coil combinations have a minimum
self-venting velocity of 1.5 feet per second (fps).
GV
GV
GV
The following figure illustrates an example of a split-system
component arrangement. Use it to determine the proper,
relative sequence of the components in the refrigerant lines
that connect the condensing unit to an evaporator coil.
Piping and Connections
# Rows
4,6,8
2,4,6,8
2,4,6,8
2,4,6,8
Water supply
main
Water
return main
55