CVHH-SVX001G-EN
33
maintain the correct baffle arrangements. Use a new
gasket with each waterbox cover.
Three-pass waterboxes have lifting lugs on the top and
bottom. When reinstalling, ensure that the waterbox is
oriented the same way it as removed.
Grooved Pipe Coupling
A customer-supplied, standard flexible grooved pipe
coupling (Victaulic
®
Style 77 or equivalent) should be
used to complete the Victaulic
®
connection for both
150 psig (1034.2 kPaG) and 300 psig (2068.4 kPaG)
waterboxes.
When a flexible coupling such as this is installed at the
waterbox connections, other flexible piping connectors
(i.e., braided-steel, elastomeric arch, etc.) are not
usually required to attenuate vibration and/or prevent
stress on the connections.
Table 10.
Water piping connection components
Unit
Model
Unit Connection
Type
Customer Piping Connection
Victaulic
®
®
Flanged
CVHH
Flanged (optional)
Customer
provided
Victaulic
®
coupling
No adapter
required
CVHH
Victaulic
®
(all
others)
Customer
provided
Victaulic
®
coupling
Trane provided
Victaulic
®
-to-
flange adapter
Figure 18.
Customer piping connection types
Flanged
Victaulic®
Waterbox
Waterbox
Customer
Flange Adaptor
Trane provided
Style 77 Flexible
Customer provided
N
No
otte
ess::
•
Refer to the coupling manufacturer’s
guidelines for specific information
concerning proper piping system design
and construction methods for grooved
water piping systems.
•
Flexible coupling gaskets require proper
lubrication before installation to provide a
good seal. Refer to the coupling
manufacturer’s guidelines for proper
lubricant type and application.
Flange-connection Adapters
When flat-face flange connections are specified, flange-
to-groove adapters are provided (Victaulic
®
Style 741
for 150 psig [1034.2 kPaG] systems; Style 743 for
300 psig [2068.4 kPaG] systems). The adapters are
shipped screwed to one of the chiller end-supports.
Adapter descriptions are given in the tables in
“Victaulic Gasket Installation,” p. 34
. The flange
adapters provide a direct, rigid connection of flanged
components to the grooved-pipe chiller waterbox
connections.
Figure 19.
Typical shipping location for flange
In this case, the use of flexible type connectors (i.e.,
braided steel, elastomeric arch, etc.) are recommended
to attenuate vibration and prevent stress at the
waterbox connections. Flange adapters are not
provided for CVHH CenTraVac
™
chillers with 300 psig
(2068.4 kPaG) waterboxes that have 14 in. (355.6 mm)
and larger piping connections.
All flange-to-flange assembly screws must be provided
by the installer. Hex head screw sizes and number
required are included in the tables in
. The four draw-bolts needed for the
14 in. (355.6 mm) and larger Style 741 (150 psig
[1034.2 kPaG]) adapters are provided. The Style 741
(150 psig [1034.2 kPaG]) flange adapter requires a
smooth, hard surface for a good seal.
Connection to other type flange faces (i.e., raised,
serrated, rubber, etc.) requires the use of a flange
washer between the faces. Refer to the flange adapter
manufacturer’s guidelines for specific information.
The Style 743 (300 psig [2068.4 kPaG]) flange adapters
are designed to mate with raised-face flanges. They
can be used with flat-faced flanges, but only if the
raised projections on the outside face of the adapter
are removed; refer to the following figure. The flange-
adapter gasket must be placed with the color-coded lip
on the pipe and the other lip facing the mating flange.
Summary of Contents for CVHH CenTraVac
Page 126: ...126 CVHH SVX001G EN N No ot te es s ...
