Trane CAUJ-C20, Инструкция по установке, эксплуатации и обслуживанию

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34 CAUJ-SVX01E-EN
Table 11. Expansion valve selection, 80 to 120 ton MCHE (15% bleed) (continued)
Min Tonnage Max Tonnage
Manufacturer
Selection (a)
Trane Part
7 12
Sporlan ERZE-8-ZGA (BP/15)
VAL10581
9.5 15.5
Sporlan ERZE-12-1/2-ZGA (BP/15)
VAL10582
12.5 19
Sporlan ERZE-15-ZGA (BP/15)
VAL10583
15 25
Sporlan OZE-20-ZGA (BP/15)
VAL10584
19.5 30
Sporlan OZE-25-ZGA (BP/15)
VAL10585
23.5 45
Sporlan OZE-35-ZGA (BP/15)
VAL10586
35 68
Sporlan OZE-50-ZGA (BP/15)
VAL10587
52.5 70
Sporlan OZE-60-ZGA (BP/15)
VAL10588
(a) Valve part numbers with “-ZGA” in place of “-GA”, may be used interchangeably.
Ball Shutoff Valves
The ball shutoff valve allows for isolation of the filter/
filter drier for easier core replacement.
Two ball shutoff valves equal to the OD tubing size for
liquid line are required.
Discharge Line Components
Field supplied hot gas mufflers, pipe anchors, single or
double risers, oil traps, etc. as applicable, should be
provide to prevent excessive line vibration and assure
proper oil return to the compressor for proper system
operation.
A field supplied discharge “shutoff” valve in each hot
gas line near the condenser is recommended to
facilitate refrigerant storage in the condenser during
service procedures.
A “constant drain” oil trap is illustrated below and can
be used as an alternative to a double riser application.
The constant drain oil trap assures adequate oil return
to the suction line even at part load conditions.
Figure 23. Hot gas line components
Oil Tr a p
Dr ip Le g
Hot Ga s
1 / 4 " S o le n o id
Valve
Filt e r
Oil Retu r n
Lin e
Cop p e r Tu b in g
1 / 8 ” ( 5 ’ lo n g )
Refrigerant Piping
N NO OT TIIC CE E
C Co om mp prre es ss so orr D Da am ma ag ge e!!
P PO OE E o oiill iiss h hy yg grro os sc co op piic c –– iitt a ab bsso orrb bss w wa atte err d diirre eccttlly y
ffrro om m tth he e a aiirr.. T Th hiis s w wa atte err iiss n ne ea arrlly y iim mp po ossssiib blle e tto o
rre em mo ov ve e ffrro om m tth he e cco om mp prre es ssso orr o oiill a an nd d cca an n rre es su ulltt iin n
cco om mp prre es ssso orr ffa aiillu urre ess..
T To o p prre ev ve en ntt P PO OE E o oiill ffrro om m a ab bsso orrb biin ng g w wa atte err,, tth he e
ssy ys stte em m ssh ho ou ulld d n no ott rre em ma aiin n o op pe en n ffo orr llo on ng ge err tth ha an n
n ne ecce es sssa arry y.. W Wh he en n o op pe en n,, d drry y n niittrro og ge en n ssh ho ou ulld d ffllo ow w
tth hrro ou ug gh h tth he e p piip piin ng g.. O On nlly y n ne ew w o oiill cco on ntta aiin ne errss
ssh ho ou ulld d b be e u usse ed d ffo orr sse errv viicce e a an nd d m ma aiin ntte en na an ncce e..
A Allw wa ay yss u us se e tth he e ssm ma alllle esstt c co on ntta aiin ne err ssiizze e rre eq qu uiirre ed d
ffo orr tth he e jjo ob b rre eq qu uiirre em me en nttss.. A Allw wa ay ys s lle ea av ve e tth he e o oiill
cco on ntta aiin ne err ttiig gh httlly y sse ea alle ed d u un nttiill ttiim me e o off u usse e.. D Do o n no ott
rre eu usse e o oiill tth ha att h ha ass b be ee en n o op pe en ne ed d..
Refrigerant piping must be properly sized and applied.
These two factors have a very significant effect on both
system performance and reliability.
N No otte e:: Use Type “L” refrigerant grade copper tubing
only.
Refrigerant Piping should be sized and laid out
according to the job plans and specifications. This
should be done when the system components are
selected.
The primary objective when sizing refrigerant piping
for this unit is to make refrigerant line sizes as small as
possible while avoiding excessive refrigerant pressure
drops.
Sizing refrigerant lines as small as possible minimizes
the required refrigerant charge and maximizes
compressor life.
See SS-APG012-EN for line sizing information.
Liquid Line Piping
Basic sizing parameters with the system operating at
full load for liquid lines are:
• Maximum Liquid velocity: 600 fpm
IIn ns stta alllla attiio on n M Me ecch ha an niic ca all