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RLC-PRC016-EN
Features and
Benefits
Excellent Reliability
A building environment is expected to
be comfortable. When it is, no one says
a word. If it’s not… that’s a different
story. The same is true with chillers. No
one ever talks about chillers, yet alone
compressors, until they fail, and tenets
are uncomfortable and productivity is
lost. Trane’s helical rotary compressors
have a first year reliability rate of over
99%, which means our chillers stay
running when you need them.
Screw compressors were designed to
replace the inherent design flaws of a
reciprocating compressor. Trane’s helical
rotary compressor has successfully
achieved this goal, proven by the over
99% reliability rating of our compressor
in the first year of operation. A good
design like Trane’s should maintain this
level of reliability for several years of
chiller operation. Not all screw
compressors maintain a high reliability
and Trane is the only manufacturer that
will publish a reliability number. The
point is to make sure that you are getting
a reliable screw chiller design so that you
don’t end up with the downtime and lost
earnings that the industry is trying to
avoid by getting away from
reciprocating technology.
Fewer moving parts.
Trane’s helical
rotary compressors have only two major
rotating parts: the male and female rotor.
A reciprocating compressor can have
more than 15 times that number of
critical parts. Multiples of pistons,
valves, crankshafts, and connecting rods
in a reciprocating unit all represent
different failure paths for the
compressor. In fact, reciprocating
compressors can easily have a failure
rate four times that of a helical rotor.
Combine this with two to three
reciprocating compressors for each
helical rotary compressor on chillers of
equal tonnage, and statistics tell you it’s
a matter of time before you lose a
reciprocating compressor.
Robust parts.
Helical rotary
compressors are precisely machined
using state of the art processes from
solid metal bar stock. Tolerances are
maintained within a micron or less than
a tenth of the diameter of a human hair.
The resulting compressor is a robust yet
highly sophisticated assembly capable of
ingesting liquid refrigerant without risk
of damage. Contrast this to a
reciprocating compressor, which can be
destroyed by a single slug of liquid.
Series R
™
Compressor Highlights
• Direct-drive, low speed for high
efficiency and reliability.
• Simple design with only four moving
parts, resulting in high reliability and
low maintenance.
• Field serviceable compressor for easy
maintenance.
• Precise rotor tip clearance for optimal
efficiency.
• Suction gas-cooled motor, resulting in
lower operating temperatures for
increased motor life, and giving the
capability for:
• Five-minute start-to-start/two minute
stop-to-start capability, which allows
for closer water loop temperature
control.