3. Press the start button on the control panel. The compressor starts running and the automatic
operation LED lights up. Ten seconds after starting, the drive motor switches over from star
to delta and the compressor starts running loaded.
4. On water-cooled compressors, the cooling water is used to cool the compressor oil and
compressed air. Regulate the cooling water flow during loaded operation to obtain the most
suitable temperature at the outlet of the compressor element. This temperature is
determined by the condensation point of water at operating conditions (lower temperature
limit) and the maximum desirable oil temperature (100 °C / 212 °F) as upper limit. For good
practice, regulate the cooling flow to obtain an element outlet temperature approximately 5°
C above the relevant (lower limit) temperature obtained from the figure below. If the
calculated temperature is higher than 100° C, this will lead to more rapid oil deterioration,
which will have an impact on oil service intervals. Consult Atlas Copco for best practices in
this case. Also consult Atlas Copco in case condensate should form in the oil.
For optimal operation, the cooling water outlet temperature must never exceed the value
specified in section Reference conditions and limitations.
Minimum compressor element outlet temperature for water-cooled units
A Air inlet temperature (°C)
B Condensation temperature (°C)
C Working pressure (bar(e))
D Relative air humidity (%)
Example: If operating at a pressure of 10 bar(e) (145 psig) in an ambient temperature of 20
˚C (68 ˚F) and at a relative air humidity of 100 %, the minimum temperature to prevent
condensation formation in the oil is 68 ˚C (154 ˚F). Regulate the cooling water flow during
Instruction book
134 2920 7109 51
To Next Page
Loading...
