Protections; Service Plan - Atlas Copco ga37 User Manual

User manual

18.3 Protections

Compressor element outlet temperature 5)
(shut-down warning level)
Compressor element outlet temperature 5)
(shut-down level)
Oil separator (pressure difference)
(shut-down warning level)
Oil separator (delay at signal) 7)
For Full-Feature also 8):
Dewpoint warning temperature
Delay at signal 7)
Delay at starting 9)
On water-cooled compressors also:
Cooling water inlet temperature (warning
level)
Delay at warning signal 7)
Delay at start 10)
Cooling water outlet temperature (warning
level)
Delay at warning signal 7)
Delay at start 10)

18.4 Service plan

Service plan A (running hours)
- compressors filled with Food grade oil
- compressors filled with Roto-injectfluid
- compressors filled with HD Roto-fluid
Service plan B (running hours)
Service plan C (running hours)
Service plan D (running hours)
Footnotes chapter 18
1) The settings for the Proportional band and Integration time are determined by experiment.
Altering these settings may damage the compressor. Consult Atlas Copco.
2) Once the compressor is automatically stopped, it will remain stopped for the minimum stop time,
whatever happens with the air net pressure.
minimum 20 seconds to prevent too-short stopping periods. If a lower setting should be required,
consult Atlas Copco.
3) See section 1.4.
4) In case of LAN control. See section 15. Consult Atlas Copco.
5) The regulator does not accept illogical settings, e.g. if the warning level is programmed at 95 °C,
the minimum limit for the shut-down level changes into 96 °C. The recommended difference
between the warning level and shut-down level is 10 °C.
6) Use Atlas Copco oil separators. The recommended maximum pressure difference is 1 bar.
2920 1456 03
Minimum
°C 50 11)
°C 111
bar 0
sec 0
°C 0
sec 0
sec 0
°C 0
sec 0
sec 0
°C 0
sec 0
sec 0
Minimum
hr 12)
hr 12)
hr 12)
hr
12)
hr 12)
hr 12)
It is recommended to program this setting at
Nominal Maximum
110 119
120 120
1 2 6)
10 20
25 99
3 255
255 255
50 99
0 255
0 255
60 99
0 255
0 255
Nominal Maximum
2000 12)
4000 12)
8000 12)
4000
12)
8000 12)
24000 12)
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