Atlas Copco GA 37 VSD, Instruction Book

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10 Install the air receiver (to be purchased separately) in a frost free room, on a solid, level floor,
suitable for taking its weight.
For normal air consumption, the volume of the air net (receiver and piping) can be calculated
from:
V = (0.25 x Q
c
x P1 x T0)/(fmax x ΔP x T1), with
V = volume of the air net in l
Q
c
= free air delivery of the compressor in l/s
P1 = compressor air inlet pressure in bar(a)
fmax = maximum cycle frequency (recommended: 1 cycle/30s)
ΔP = difference between unloading pressure and loading pressure in bar
T1 = compressor air inlet temperature in K
T0 = air receiver temperature in K
11 Bypass system to bypass the dryer during service operations (available as an option, consult
Atlas Copco).
12a Air-cooled compressors:
To prevent feedback of exhaust air into the cooling inlet, sufficient space should be foreseen
above the unit to evacuate the exhaust air. Otherwise a duct for the exhaust air should be
installed. See alternatives 1 up to 4.
13 Cooling air grating, dryer
14 When a duct is foreseen on the air inlet, the ambient temperature sensor need to be repositioned
in such a way that the inlet temperature is monitored.
15 Safety valve
Safety
The operator must apply all relevant safety precautions, including those mentioned in this
book.
Outdoor/altitude operation
Fix speed compressors can be sold with option rain protection. With this option, this compressor
can be installed outside under a shelter, in frost free conditions. If frost might occur, the
appropriate measures should be taken to avoid damage to the machine and its ancillary
equipment. In this case, and also if operating above 1000 m (3300 ft), consult Atlas Copco.
Moving/lifting
The compressor can be moved by a lift truck using the slots in the frame. Take care not to
damage the bodywork during lifting or transport. Before lifting, reinstall the transport securing
bolts. Make sure that the forks protrude from the other side of the frame. The compressor can
also be lifted after inserting beams in the slots. Make sure that the beams cannot slide and that
they protrude from the frame equally. The chains must be held parallel to the bodywork by chain
spreaders in order not to damage the compressor. The lifting equipment must be placed in such
a way that the compressor is lifted perpendicularly. Lift gently and avoid twisting.
In case of units equipped with the Lifting Device Option, it is not allowed to lift the
compressor if the canopy parts or lifting supports are not completely installed. When the
compressor is being lifted, it is also forbidden to come under the load or to perform
maintenance activities to it.
Instruction book
78 API480496