32
CVHH-SVX001G-EN
this piping is not correct. Some shells may be piped as
desired since both connections are at the same level.
For applications that include an “infinite source” or
“multiple-use” cooling condenser water supply, install
a valved bypass “leg” (optional) between the supply
and return pipes. This valved bypass allows the
operator to short-circuit water flow through the cooling
condenser when the supply water temperature is too
low.
N
No
otte
e:: System refrigerant pressure differential must be
maintained above 3 psid (20.7 kPaD) at all times.
Failure to do so could result in operating
problems.
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.).
N
No
otte
e:: If needed, plug-type sensor extension cables are
available for purchase from Trane Parts Service.
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.
Table 9.
Water connection pipe sizes
Water
Passes
Shell Size
100
130
160
200
220
400
440
Evaporator
Nominal 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
Nominal Pipe Size (in.)
1-Pass
12
14
—
16
24
—
24
2-Pass
10
12
—
14
14
—
—
Evaporator
Metric Pipe Size (mm)
1-Pass
DN300 DN300 DN350 DN400 DN500 DN400 DN500
2-Pass
DN250 DN250 DN300 DN350 DN350
—
—
3-Pass
DN200 DN200 DN250 DN300 DN300
—
—
Condenser
Metric Pipe Size (mm)
1-Pass
DN300 DN350
—
DN400 DN600
—
DN600
2-Pass
DN250 DN300
—
DN350 DN350
—
—
Figure 17. Typical grooved pipe connection
Waterbox Locations
IIm
mp
po
orrtta
an
ntt:: Do NOT exchange positions of heat
recovery waterboxes. Proper unit operation
could be affected by repositioning heat
recovery waterboxes. Contact CenTraVac
™
Chiller Technical Service for more
information.
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. 113
.
If the waterboxes on any of the shells are exchanged
end-for-end, be sure to reinstall them right-side up to
Summary of Contents for CVHH CenTraVac
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