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M-SV-001-EN Rev. G
1.7.2 R1234ze
TGS and TGH series compressors are totally oil-free and optimized for use with refrigerant R1234ze
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.
1.7.3 R515B
TGS490 compressors can be used with refrigerant R515B which has an ASHRAE Standard 34 safety
classification of A1.
Table 1-2 Refrigerant Used with Danfoss Turbocor
Compressor
Refrigerant
TTS Series
R134a/R513A
TGS Series
R1234ze, R515B (TGS490 only)
TTH Series
R134a/R513A
TGH Series
R1234ze
1.8 Electrical Isolation
Before servicing the Compressor, isolate the compressor power by completing the following steps:
1. Turn off the Mains Input power to the compressor.
2. Lock Out/Tag Out (LOTO) the mains disconnect to ensure no accidental or unauthorized re-
application of the Mains Input power can occur.
NOTE
The Mains Input fast-acting fuses are installed in the power panel for all compressor models except the TT300/TG230.
3. Remove the Mains Cover only. Refer to "4.2.1 Mains Input Cover" on page 56.
4. Using an appropriately-rated voltage meter, confirm the absence of AC voltage.
• • • DANGER • • •
Do not touch any components when removing the Mains Input Cover.
5. If AC voltage is
not
present, reinstall the Mains Input cover and wait at least 20 minutes before
removing either the Mains Input or Top Side Cover. If AC voltage still exists, go back to Step 2 to
determine why the compressor voltage is not isolated.
6. Remove the Top Cover, taking particular care not to touch ANY components underneath. Refer
to "4.2.2 Top Cover" on page 57.
7. Using an appropriately-rated voltage meter, check the DC Bus Bars for DC voltage level. If the
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.
• • • DANGER • • •
• This equipment contains hazardous voltages that can cause serious injury or death. Only
qualified and trained personnel should work on Danfoss LLC equipment.
• Always wear appropriately-rated safety equipment when working around equipment and/or components energized with
high voltage.
• Removing the Mains Input Cover will expose the technician to a high voltage hazard of up to 632 VAC. Ensure the Mains
Input power is turned off and locked out before removing the Mains Input Cover.
Содержание TGH285
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