Trane RAUJ-C20, Installation, Operation And Maintenance Manual

Page: 55 / 132

SS-SVX11K-EN 55
Installation Mechanical — EVP
EVP Chilled Water Piping
Requirements
• Install properly sized chilled water pipe between the
EVP chiller and the supporting equipment. See
Chilled Water Piping section for recommended
system components and guidelines.
• Install supply and return water side pressure
gauges (with isolation valves.)
• Install thermometers in water supply and return
piping.
• Install isolation (shutoff) valves in water supply and
return piping.
• Install a properly sized strainer in the supply piping.
• Install blowdown (recommended) valve or plug in
strainer cleanout.
• Install a balancing valve in the return piping.
• Install a water flow switch in the return piping.
• Install chilled solution sensor well and sensor in the
water outlet piping.
• Install freezestat well and freezestat bulb in the
water outlet piping.
• Install chiller piping drain with shutoff valve.
• Install 1/2” x 14 NPT stainless steel or PVC plug in
braze plate chiller body.
• Flush the chilled solution piping system, if
applicable.
• Connect the chilled solution piping to the chiller.
• The braze plate chiller is intended for indoor
application. If a subfreezing location is required,
contact Trane for installation precautions required
to prevent damage.
• If using an acidic, commercial flushing solution to
prevent damage to the internal evaporator
components, flush all chilled solution piping before
making the final connection to the EVP chiller.
TXV for Remote Chiller
Piping between TXV and Chiller, a braze plate heat
exchanger (BPHE), must be 8-12” long and same size
as BPHE inlet ID. Field supplied reducer(s) may be
required at TXV. A bleed port valve is not required with
brazed plate heat exchanger applications.
N No otte ess::
• Install reducers at the TXV outlet only.
• See Dimensions and Weights chapter for
BPHE inlet dimensions.
• See Expansion Valve Selection tables in the
Installation Mechanical chapter for valve
selections.
Typical Field-Installed EVP
Chiller Evaporator Piping
N NO OT TIIC CE E
H He ea att E Ex xcch ha an ng ge err D Da am ma ag ge e!!
F Fa aiillu urre e tto o ffo ollllo ow w iin nssttrru uccttiio on nss b be ello ow w cco ou ulld d rre essu ulltt iin n
rre effrriig ge erra an ntt lle ea akkss o orr d da am ma ag ge e tto o tth he e h he ea att e ex xcch ha an ng ge err..
T Th he e b brra azze e cco on nn ne eccttiio on nss a att tth he e h he ea att e ex xcch ha an ng ge err a arre e
sstta aiin nlle essss sstte ee ell.. U Usse e 4 40 0--4 45 5% % ssiillv ve err b brra azziin ng g a allllo oy y
B BA Ag g--7 7 o orr B BA Ag g--2 29 9 ffo orr cco op pp pe err tto o sstte ee ell rre effrriig ge erra an ntt
cco on nn ne eccttiio on nss.. U Usse e ffllu ux x ssp pa arriin ng glly y tto o p prre ev ve en ntt
p pllu ug gg giin ng g h he ea att e ex xcch ha an ng ge err ffllo ow w p pa assssa ag ge ess..
1. Install the TXV(s) directly to the unit liquid
connection. See TXV recommendations in the Tube
Size and Component Selection Application Guide,
publication number SS-APG012-EN.
N NO OT TIIC CE E
E Ev va ap po orra atto orr D Da am ma ag ge e!!
F Fa aiillu urre e tto o ffo ollllo ow w iin nssttrru uccttiio on nss b be ello ow w cco ou ulld d rre essu ulltt iin n
e ev va ap po orra atto orr d da am ma ag ge e..
T To o p prre ev ve en ntt e ev va ap po orra atto orr d da am ma ag ge e a an nd d ffo orr p prro op pe err
rre effrriig ge erra an ntt d diissttrriib bu uttiio on n,, a an n 8 8--1 12 2” ” ssttu ub b ttu ub be e m mu usstt
b be e b brra azze ed d b be ettw we ee en n tth he e e ex xp pa an nssiio on n v va allv ve e a an nd d tth he e
cch hiilllle err e en ntte erriin ng g rre effrriig ge erra an ntt cco on nn ne eccttiio on n.. T Th hiiss ttu ub be e
m mu usstt b be e tth he e ssa am me e d diia am me ette err a ass tth he e h he ea att e ex xcch ha an ng ge err
cco on nn ne eccttiio on n IID D.. U Usse e rre ed du ucce errss o on nlly y a att tth he e e ex xp pa an nssiio on n
v va allv ve e.. S Se ee e d diim me en nssiio on n d drra aw wiin ng gss ffo orr iin nlle ett
d diim me en nssiio on nss..
2. Locate TXV bulb on top of the suction line 12” from
the heat exchanger outlet.
3. Secure the bulb to the suction line with two clamps
provided by the manufacturer and insulate the bulb.
4. Locate liquid line solenoid valve(s) near TXV.
5. Install the Frostat™ according to instructions
enclosed in the kit as close to the evaporator as
possible.