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5. Drain pipes to drain collector must not dip into the water. For draining of pure condensate water, install an
oil separator. Consult Quincy.
Drain pipes of different compressors may not be interconnected before the (atmospheric) collector.
Interconnecting drain pipes of different compressors can damage the electronic drains of the compressor.
6. Control cubicle with monitoring panel.
7. Power supply cable to be sized and installed by a qualified electrician. In case of IT network, consult
Quincy. To preserve the protection degree of the electric cubicle and to protect its components from dust
from the environment, it is absolutely necessary to use a proper cable gland when connecting the supply
cable to the compressor.
8. Filter type DD for general purpose filtration (particle removal down to 1 micron with a maximum oil carry
over of 0.5 ppm). A high efficiency PD filter may be installed downstream the DD filter (particle removal
down to 0.01 micron and max. oil carry over of 0.01ppm) Should oil vapours and odor be undesirable, a
QD active carbon filter should be installed after the PD filter.
It is recommended to install by-pass pipes over each filter together with ball valves in order to isolate the
filters during service operations, without interrupting the compressed air delivery.
9. The air receiver (optional) should be installed in a frost-free room on a solid level floor. For normal air
consumption, the volume of the air net (receiver and piping) can be calculated as follows:
Where,
In Metric units,
V = volume of the air net in l
Qc = free air delivery of the compressor in l/s
P1= compressor air inlet pressure in bar absolute
fmax = cycle frequency=1 cycle/30s
ƩP = P
unload
T1 = compressor air inlet temperature in K
T0 = air receiver temperature K
In Imperial units,
V = volume of the air net in gallon
Qc = free air delivery of the compressor in cfm
P1= compressor air inlet pressure in psi absolute
fmax = cycle frequency=1 cycle/30s
ƩP = P
unload
T1 = compressor air inlet temperature in °F
T0 = air receiver temperature °F
10. To prevent feedback of exhaust air to the cooling inlet, sufficient space should be foreseen above the unit
to evacuate the exhaust air. Otherwise a ducting for the exhaust air should be foreseen.
See ALT.1 to ALT.4
11. Safety valve.
2012 2039 28
V= (0.25 x Qc x P1 x To)/(fmax x ƩP xT1)
- P
in bar / psi
load
- P
in psi
load
Instruction book
58
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