Installation: Water Piping
26 CVHH-SVX001A-EN
Water Piping Connections
All standard units use grooved-pipe connections. These
are grooved-end NSP (Victaulic style) pipe connections.
Flanged connections are optional.
Piping joined using grooved type couplings, like all types
of piping systems, requires proper support to carry the
weight of pipes and equipment. The support methods
used must eliminate undue stresses on joints, piping and
other components; allow movement where required, and
provide for any other special requirements (i.e., drainage,
etc.).
Note: Plug-type sensor extension cables are available for
purchase from Trane Parts Service if needed. These
sensor extension cables may be necessary if the
waterboxes are changed or if the temperature
sensors are moved out into the unit piping for
better mixed temperature readings.
Waterbox Locations
If necessary, the non-marine-style waterboxes on each
shell whether evaporator or condenser can be switched
end-for-end to obtain the desired piping arrangement.
If removal of waterboxes is necessary, refer to
“ Waterbox
Removal and Installation,” p. 98
.
If the waterboxes on any of the shells are exchanged end-
for-end, be sure to reinstall them right side up to maintain
the correct baffle arrangements. Use a new gasket with
each waterbox cover.
Table 4. Water connection pipe sizes
W ater
Passes
Shell Size
100 130 16 0 2 0 0 2 2 0 4 0 0 44 0
Evaporator Metric Pipe Size ( m m )
1 Pass DN300 DN300 DN350 DN400 DN500 DN400 DN500
2 Pass DN250 DN250 DN300 DN350 DN350 — —
3 Pass DN200 DN200 DN250 DN300 DN300 — —
Condenser
1 Pass DN300 DN350 — DN400 DN600 — DN600
2 Pass DN250 DN300 — DN350 DN350 — —
Evaporator Nom inal Pipe Size ( in.)
1 Pass 12 12 14 16 20 16 20
2 Pass 10 10 12 14 14 — —
3 Pass 8 8 10 12 12 — —
Condenser
1 Pass 12 14 — 16 24 — 24
2 Pass 10 12 — 14 14 — —
Figure 14. Typical grooved pipe connection
NOTICE:
Do Not Exchange Positions of Heat
Recovery Waterboxes!
Failure to follow this instruction could prevent proper
unit operation. Contact CenTraVac Technical Service for
switching of heat recovery waterboxes.
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