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M-AP-001-EN Rev. N
Compressor performance, including applicable capacity range, varies based on the
operating conditions. The capacity range, eciency, and other operational information for
each compressor can be determined only by using the authorized software known as the
“Compressor Performance Rating Engine” or “CPR Engine”. This software and a selection tool
is available on our website.
7.1 Performance Ratings
All TT and TG compressors are guaranteed to meet the published performance ratings in our
CPR Engine within ±5% for capacity, eciency, and power for given operating conditions.
This tolerance band is valid for the area of the operating map which is in the speed control
range only. As the compressor reduces speed and mechanical unloading is enabled such as
the closing of the variable IGV, the tolerance increases to ±10%.
The conditions considered are only the ange-to-ange conditions seen at the compressor
rather than the conditions seen at other points in the system.
The compressor performance ratings are based on using R-134a for the TT series
compressors and R-1234ze for the TG series compressors. The use of alternative refrigerants
in these compressors may lead to variances in the performance. When using refrigerant
R-513A, the tolerance rating is increased by an additional 1.5% so that it is ±6.5% in the
speed control range and 11.5% in the area where mechanical unloading is enabled.
7.2 Tolerance of
Performance Ratings
7 Compressor Performance
Compressor Performance
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