Atlas Copco GA 110 VSD+ Instruction Book page 63

Instruction book
Reference
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Description
For SI units
Ventilation:
The inlet grid(s) and ventilation fan must be installed in such a way that any re-
circulation of cooling air to the compressor is avoided. The air velocity to the grid(s) has
to be limited to 5 m/s
The maximum allowable pressure drop over all cooling ducts together is 30 Pa
The maximum air temperature at the compressor intake opening is 46 °C (50 °C for
HAT version), minimum 0 °C
The required ventilation to limit the compressor room temperature can be calculated as
follows:
Qv = 0.92N / dT (air-cooled unit)
Qv = 0.1N / dT (water-cooled unit)
Qv= Required ventilation capacity in m
N = Shaft input of the compressor in kW
dT = Compressor room temperature over the outdoor temperature in °C
For British/American units:
Ventilation:
The inlet grid(s) and ventilation fan must be installed in such a way that any re-
circulation of cooling air to the compressor is avoided. The air velocity to the grid(s) has
to be limited to 5 m/s
The maximum allowable pressure drop over all cooling ducts together is 4.35 x 10 psi
The maximum air temperature at the compressor intake opening is 114.8 °F (122 °F for
HAT version), minimum 32 °F
The required ventilation to limit the compressor room temperature can be calculated as
follows:
Qv = 2845 x (0.92N) / dT (air-cooled unit)
Qv = 2845 x (0.1N) / dT (water-cooled unit)
Qv= Required ventilation capacity in cfm
N = Shaft input of the compressor in hP
dT = Compressor room temperature over the outdoor temperature in °F
Drain pipes to condensate collector. The drain pipes may not enter in the collector.
Individual drain pipes may not be interconnected to avoid interference
Compressor condensate contains oil. Depending on local legislation, it is recommended
to install an oil/water separator (consult Atlas Copco)
Control cubicle with monitoring panel
Main cable entry
Cooling water inlet pipe (only water-cooled unit)
Cooling water outlet pipe (only water-cooled unit)
Minimum free area to be reserved for the compressor installation
Ventilation proposals
Air-cooled compressor
Water-cooled compressor
Cooling air outlet (air-cooled unit)
Dryer cooling air outlet (air-cooled Full-Feature unit)
Canopy ventilation outlet (water-cooled unit)
Compressor air inlet
Cooling air inlet (air-cooled unit)
Canopy ventilation inlet (water-cooled unit)
Cubicle ventilation air inlet
Dryer cooling air inlet (only air-cooled Full-Feature unit)
3
/s
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