35 of 114M-AP-001-EN Rev. Q
Chapter 5.0 General Specifications
5.1 Construction
• Compressor - Semi-hermetic design
• Main Housing - Dimensionally-stabilized aluminum
• Covers - High-impact, UV stabilized, flame-resistant polymer.
• Covers - High-impact, UV stabilized, flame- resistant polymer. TGS series is identified
by green cover.
• Shaft - High-strength alloy
• Impellers - High-strength aluminum
• Motor - Permanent magnet, synchronous, DC
• Bearings - Integrated, digitally-controlled, magnetic
• Compressor Control - Integrated, digital capacity control
• Enclosure - IP54 rating as per UL 984 requirement
• UL60335-2-34
5.2 Maximum Pressure
The maximum pressure that the compressor can operate is regulated directly by two control settings:
(1) Alarm Limit and (2) Trip Limit. It is also controlled by a Pressure Ratio alarm limit monitoring the
ratio between the Discharge and Suction Pressures.
Table 5-1 Discharge Pressure Alarm and Trip Settings
* In the TGS230/TTS300 compressors, the alarm and trip settings default to lower values of operation, which are
typically deemed appropriate for Water-Cooled conditions.
These values allow for adjustment for compressors placed in Air-Cooled applications, which can have
the value increased up to 1730 kPa(g)/250 PSIG for the Alarm and 1800 kPa(g)/260 PSIG for the Trip.
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Model
Alarm Trip
kPa(g) PSIG kPa(g)2 PSIG3
TGS230ST* 1239 180 1299 188
TGS230MT* 1116
162
1176 171
TGS310 1240 180 1300 189
TGS490 1240 180 1300 189
TGS390 876 127 926 134
TGS520 876 127 926 134
TGH285 1510 218 1586 229
TTS300ST* 1190 173 1240 180
TTS300MT* 1190 173 1240 180
TTS350 1730 251 1800 261
TTS400 1190 173 1240 180
TTS700 1190 173 1240 180
TTH375 2016 292 2116 306
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