User manual

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Instruction book
c Oil level too low
c Check and correct as necessary
d Oil coolers clogged
d Consult Atlas Copco
e Air cooler clogged
e Consult Atlas Copco
f On GA W, restriction in cooling water system due to dirt or
formation of scale
f Consult Atlas Copco
7 If an oil/water separator (OSD) is provided: turbulence
in separator vessel
a Air leakage through condensate flexible towards vessel
a Remove float valve assembly, clean and check
7 PRINCIPAL DATA
7.1 Readings on display
Normally the main screen (Fig. 1.12) is shown, indicating the actual air outlet pressure and the actual compressor status.
The ¯ key allows the operator to call up other information about the condition of the compressor (see section 3.5).
The readings below are valid when operating at reference conditions (section 7.5.1):
Maximum unloading pressure . . . . . . . . . . . . . . . . . . . . . . . . . See section 7.5
Compressor outlet pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . Depends on programmed unloading and loading pressures
Pressure drop over air filters . . . . . . . . . . . . . . . . . . . . . . . . . . Below 0.050 bar
Pressure difference over oil separator . . . . . . . . . . . . . . . . . . . Below 0.8 bar
Oil injection pressure at the compressor elements. . . . . . . . . . Depends on programmed unloading and loading pressures
Compressor outlet temperature:
-for GA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Approx. 29°C
-for GA Full-feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Approx. 26°C
-for GA W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Approx. 25°C
-for GA W Full-feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Approx. 22°C
Compressor element outlet temperature. . . . . . . . . . . . . . . . . . Between 55 and 100°C
Cooling air inlet temperature (on GA) . . . . . . . . . . . . . . . . . . Below 40°C 8)
Cooling water temperature (on GA W) . . . . . . . . . . . . . . . . . . Below 50°C
Pressure dewpoint (GA Full-feature) . . . . . . . . . . . . . . . . . . . Approx. 3°C 6)
Pressure drop over DD filter (option) . . . . . . . . . . . . . . . . . . . Below 0.35 bar
7.2 Programmable settings
A number of regulation parameters (e.g. loading and unloading pressures) and protection settings (e.g. shut-down level for the
compressor element temperature) are programmable. The "User manual for Elektronikon regulator" deals elaborately with this
matter (section "Submenu MODIFY PARAMETERS").
7.3 Settings of safety valve
11 bar(e) for 7.5 bar and 8.5 bar CE version
15 bar(e) for all other versions
Important
Some compressors with a specific approval may have valves with other settings. Always consult the data stamped on the valve
or consult Atlas Copco.