Trane IntelliPak SCRF 25, Инструкция по установке, эксплуатации и обслуживанию

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62 SCXF-SVX01Q-EN
Table 34. Compressor stages
Unit Size
Refrigerant
Circuit Type
Compressor by Stage
Compressor Staging Compressor Staging
A B C D E F
SXWF 20, 22, 25 Independent
10 10 B/AB A/AB
SXWF 29, 32
SXRF 25, 29
Independent 15 10 B/A/AB A/AB
SXWF 35, 38 Independent
10 10 10
B/BC/ABC A/AC/ABC
SXRF 30, 35
Manifolded 10 10 10
B/BC/ABC A/AC/ABC
SXWF 42, 46 Independent
15 10 10 B/A/AC/ABC C/AC/ABC
SXRF 40 Manifolded 15 10 10
B/A/AC/ABC C/AC/ABC
SXWF 52, 58 Independent
15 15 15
B/BC/ABC A/AC/ABC
SXRF 50 Manifolded 15 15 15 B/BC/ABC A/AC/ABC
SXWF 65, 72 Independent
15 15 15 10
B/BD/ABD/ABCD A/AD/ACD/ABCD
SXWF 80
Independent
15 15 15 15
B/BD/ABD/ABCD A/AC/ABC/ABCD
SXRF 60 Manifolded 15 15 15 15
B/BD/ABD/ABCD A/AC/ABC/ABCD
SCWF 90 Independent 15 15 15 15 15 A/AB/ABC/ABCDE C/CDE/ACDE/BCDEF
SCWF 100 Independent 15 15 15 15 10 10 A/AB/ABCD/ABCDEF CD/CDEF/ACDEF/ABCDEF
SCWF C1 Independent 15 15 15 15 15 15 A/AB/ABCD/ABCDEF CD/CDEF/ACDEF/ABCDEF
Figure 31. Typical pulldown curve for unit operating
properly within control band
Figure 32. Typical pulldown curve for unit operating
improperly outside control band
Compressor Safety Devices
If a compressor low pressure cutout opens during
compressor startup, the UCM will not shut the
compressor off during the first two to three minutes
after startup. This prevents possible nuisance trips
during low ambient start conditions. See
Table 35, p.
62 .
Each compressor’s discharge line contains a high
pressure cutout. Under abnormal operating conditions,
the cutout will open to stop compressor operation.
Table 35. Pressure cutouts (open/close)
Unit Model
High Pressure
Cutout
Low Pressure
Cutout
SXWF
553/424 49/74
SXRF 650/500 36/61
Low Ambient Compressor Lockout
This function will lock out the compressor if the
outdoor air temperature sensor reads an outdoor
temperature below the low ambient compressor
lockout temperature setpoint. This setpoint is
adjustable at the human interface panel. Compressors
will lock out when outdoor air temperature falls below
that selected temperature and will start again when the
temperature rises 5°F above the setpoint.
Evaporator Coil Frost Protection
FROSTAT
The FROSTAT ™ system eliminates the need for hot gas
bypass. It utilizes an evaporator temperature sensor
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