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M-AP-001-EN Rev. N
The TT/TG Centrifugal series of compressors is a group of compressors that covers the
nominal capacity range from 90 to 200 Tons (TT) and 70 to 150 Tons (TG) tons.
The TT/TG series of compressors are an oil free centrifugal design based on magnetic
bearing technology.
2.1 TT/TG Compressor
Nomenclature
2 Overview of the
TT/TG Compressor
TT300 - G - 1 - ST - E - CE
Unit Classification
CE: With CE Mark
NC: Non-conductive Coating
CH: China
Major Revision
N, P, C, A, D, E, F, G...etc.
Options
ST: Standard
MT: Medium Temp
HL: High Lift
Series
TT300
TT350
TT400
TT700
TG230
TG310
TG390
TG520
Voltage
**
D: 380V / 3Ph / 60Hz
E: 380V / 3Ph / 50Hz
F: 575V / 3Ph / 60Hz
G: 460V / 3Ph / 60Hz
H: 400V / 3Ph / 50Hz
J: 400V / 3Ph / 60Hz
Refrigerant
1: R-134a
2: R-22
3: R-1234ze (E)
4: R513A
Overview of the TT/TG Compressor
Figure 2-1 - Compressor
Nomenclature
The TT series compressors are totally oil-free and optimized for use with refrigerant R134a.
The TG series compressor is for use with R1234ze(E) refrigerant only.
ASHRAE standard 34 has classified this refrigerant as “R1234ze(E) with safety classification of
A2L”. ASHRAE Standard 34, 2010 Addendum 1 contains the change to the standard.
ASHRAE Standard 15 (Safety Standard) has sent out an initial public review document
outlining proposed changes to this standard to address 2L refrigerants.
2.2 Refrigerant Type
2.2.1 TG Series
NOTE
Do not use recycled refrigerant as it may contain oil, which can affect system reliability. The refrigerant should be pure
and stored in virgin containers.
Table 2-1 - Refrigerant Used
with Turbocor Compressors
Compressor
Refrigerant
TT series
R134a/R513A
TG series
R1234ze(E)
NOTE
To ensure a reliable chiller system, all system components, most notably expansion valves, solenoid valves, and sensors, be
appropriate for application in oil free systems as determined by the component manufacturer. In addition, all chiller system
components exposed to refrigerant should be approved by their manufacturer for use with that refrigerant.
Summary of Contents for Turbocor TT Series
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