Trane Technologies CenTraVac CVHE, Installation, Operation And Maintenance Manual

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30 CVHE-SVX005B-EN
Installation: Water Piping
Overview
The following water piping circuits must be installed
and connected to the chiller:
• Pipe the evaporator into the chilled water circuit.
• Pipe the condenser into the cooling tower water
circuit.
• Optional: A heat-recovery condenser water circuit.
• Optional: An auxiliary condenser water circuit.
N No otte e:: Piping must be arranged and supported to avoid
stress on the equipment. It is strongly
recommended that the piping contractor does
not run pipe closer than 3 ft (0.9 m) minimum to
the equipment. This will allow for proper fit upon
arrival of the unit at the job site. Any adjustment
that is necessary can be made to the piping at
that time. Expenses that result from a failure to
follow this recommendation will NOT be paid by
Trane.
Piping suggestions for each of the water circuits listed
above are outlined in
“Evaporator and Condenser
Water Piping,” p. 33 . General recommendations for the
installation of field-supplied piping components (e.g.,
valves, flow switches, etc.) common to most chiller
water circuits are listed in the following sections.
Water Treatment
The use of untreated or improperly treated water in a
CenTraVac
™ chiller may result in inefficient operation
and possible tube damage.
IIm mp po orrtta an ntt:: Trane strongly recommends using the
services of a qualified water treatment
specialist to determine necessary water
treatment. A label with a customer
disclaimer note is affixed to each unit.
N NO OT TIIC CE E
P Prro op pe err W Wa atte err T Trre ea attm me en ntt R Re eq qu uiirre ed d!!
T Th he e u usse e o off u un nttrre ea atte ed d o orr iim mp prro op pe errlly y ttrre ea atte ed d w wa atte err
cco ou ulld d rre essu ulltt iin n sscca alliin ng g,, e erro ossiio on n,, cco orrrro ossiio on n,, a allg ga ae e o orr
sslliim me e..
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ssp pe ecciia alliisstt tto o d de ette errm miin ne e w wh ha att w wa atte err ttrre ea attm me en ntt,, iiff
a an ny y,, iiss rre eq qu uiirre ed d.. T Trra an ne e a assssu um me ess n no o rre essp po on nssiib biilliitty y
ffo orr e eq qu uiip pm me en ntt ffa aiillu urre ess w wh hiicch h rre essu ulltt ffrro om m u un nttrre ea atte ed d
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w wa atte err..
Water Pressure Gauges
Locate pressure gauge taps in a straight length of pipe.
Place each tap a minimum of one pipe diameter
downstream of any elbow, orifice, etc. For example, for
a 6 in. (16 cm) pipe, the tap would be at least 6 in. (16
cm) from any elbow, orifice, etc.
Valves—Drains and Vents
N NO OT TIIC CE E
W Wa atte errb bo ox x D Da am ma ag ge e!!
F Fa aiillu urre e tto o ffo ollllo ow w iin nssttrru uccttiio on nss cco ou ulld d rre essu ulltt iin n
d da am ma ag ge e tto o tth he e w wa atte errb bo ox x..
D Do o n no ott o ov ve err--ttiig gh htte en n o orr u usse e e ex xcce essssiiv ve e T Te effllo on n® ® p piip pe e
tta ap pe e w wh he en n iin nsstta alllliin ng g v va allv ve ess,, d drra aiin nss,, p pllu ug gss a an nd d
v ve en nttss o on n w wa atte errb bo ox xe ess..
1. Install field-supplied air vents and drain valves on
the waterboxes. Each waterbox is provided with a
National Pipe Thread Female (NPTF) vent and drain
connection; depending on the waterbox types
ordered, the openings may be 1/4 in. (6.35 mm), 1/
2 in. (12.7 mm), or 3/4 in. (19.05 mm).
N NO OT TIIC CE E
W Wa atte errb bo ox x D Da am ma ag ge e!!
F Fa aiillu urre e tto o ffo ollllo ow w iin nssttrru uccttiio on nss cco ou ulld d rre essu ulltt iin n
d da am ma ag ge e tto o tth he e w wa atte errb bo ox x d du ue e tto o h hy yd drro osstta attiicc
e ex xp pa an nssiio on n..
IIn nsstta allll p prre essssu urre e--rre elliie eff v va allv ve ess iin n tth he e cco on nd de en nsse err
a an nd d e ev va ap po orra atto orr w wa atte err cciirrccu uiittss..
N NO OT TIIC CE E
E Eq qu uiip pm me en ntt D Da am ma ag ge e!!
F Fa aiillu urre e tto o ffo ollllo ow w iin nssttrru uccttiio on nss cco ou ulld d rre essu ulltt iin n
e eq qu uiip pm me en ntt d da am ma ag ge e..
D Do o N NO OT T a allllo ow w cch hiilllle err tto o ffrre ee ezze e!! B Bu un nd dlle ess m mu usstt
b be e d drra aiin ne ed d a an nd d a aiirr--b bllo ow wn n d drry y iiff cch hiilllle err iiss sstto orre ed d
iin n a an n u un nh he ea atte ed d e eq qu uiip pm me en ntt rro oo om m..
2. If necessary for the application, install pressure-
relief valves at the drain connections on the
evaporator and condenser waterboxes. To do so,
add a tee with the relief valve attached to the drain
valve.
To determine whether or not pressure relief valves
are needed for a specific application, keep in mind
that:
a. Vessels with close-coupled shutoff valves may
cause high potentially damaging hydrostatic
pressures as fluid temperature rises.
b. Relief valves are required by American Society
of Mechanical Engineers (ASME) codes when
the shell waterside is ASME. Follow ASME
guidelines or other applicable codes to ensure
proper relief valve installation.