Danfoss TGH285 Applications And Installation Manual Download

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It is essential that compressor motor and power electronics cooling is available immediately at start up. The

compressor motor cooling liquid feed line must be configured and located so this occurs. Recommended minimum

pipe size is 1/2” for all models. A larger size may be necessary in some situations such as systems with low

subcooling on start or extended piping runs. A full-flow filter/drier must be installed and a liquid sight glass must be

installed adjacent to each compressor. In multiple compressor systems, a single filter/dryer may serve multiple

compressors but each compressor must have a dedicated sight glass.

13.4 Electrical Requirements

Power is permanently connected to the compressor connection terminals. A line reactor must be connected in series

with the compressor connection. The line reactor enclosure or box should be properly ventilated to avoid

overheating.

13.5 Application-Specific Requirements

13.5.1 Medium Evaporating Temperature Application (TGS230/TTS300/TGH285/TTH375)

NOTE

Medium Evaporating Temperature is defined as between 0 and -10°C (between 32 and 14°F) for TTS300/TGS230 and between 0 and -18°C

(between 32 and -0.4°F) for TTH375/TGH285.

Check the operating envelope for limits, required compressor version, and accessories.

For medium-temperature applications, an evaporating pressure regulator, Type KVP, is included with the

compressor and must be installed external to the compressor between the main suction line and the

motor/electronics cooling outlet port adjacent to the inter stage port. The valve has a Solder ODF connection with

7/8" diameter (Danfoss KVP 22), set at a corresponding pressure to 0.8°C (34°F) saturated temperature (depending

on the used refrigerant). Refer to C.1 Pressure Regulating Valve Installation InstructionsThe motor/electronics

cooling outlet port is fitted with a 5/8” flare adapter.

NOTE

Danfoss LLC highly recommends the insulation of the suction and inter-stage pipe as well as the bottom of the compressor for MT

applications to prevent ice buildups.

13.5.2 High Evaporating Temperature Application (TGS310/TTS350/TGS490/TGS390/TTS400/TGS520/TTS700)

NOTE

High Evaporating Temperature is defined as between 12 and 30°C (53.6 and 86°F) and only applies to
TGS310/TTS350/TGS490/TGS390/TTS400/TGS520/TTH700 compressors.

The standard Evaporating Temperature is defined as between -1 and 12°C (30.2 and 53.6°F) and applies to all compressors.

It is not recommended to run a High Evaporating Temperature compressor in Standard Evaporating Temperature conditions
as it will eventually lead to a failure.

1. Check the operating envelope for limits and always validate the application with CPR engine in order

to make sure the compressor will work properly.

2. Make sure not to run a High Evaporating Temperature compressor in Standard Evaporating

Temperature conditions as it will eventually lead to failure.

M-AP-001-EN Rev. S-9/8/2021 Page 77 of 136