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5
The drain pipes to the drain collector must not dip into the water of the drain
collector. Atlas Copco has oil/water separators (type OSD or OSCi) to separate the
oil from the condensate to ensure that the condensate meets the requirements of the
environmental codes.
Drain pipes of different compressors may not be interconnected before the
(atmospheric) collector as this can damage the electronic drains.
6 Control module with monitoring panel.
7
Power supply cable to be sized and installed by a qualified electrician.
To preserve the protection degree of the electric cubicle and to protect its components
from dust from the environment, it is mandatory to use a proper cable gland when
connecting the supply cable to the compressor.
8 Provision for energy recovery system.
9
Filter, type DD for general purposes. The filter traps solid particles down to 1 micron
with a max. carry-over of 0.5 mg/m
3
. A high-efficiency filter, type PD, maybe installed
downstream of a DD This filter traps solid particles down to 0.01 micron with a max. oil
carry-over of 0.01 mg/m
3
. If vapours and odours are undesirable, a QD type filter
should be installed downstream of the PD It is recommended to install by-pass pipes
over each filter together with ball valves, in order to the filters during service operations
without disturbing the compressed air delivery.
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 Qc x P1 x T0)/(fmax x ǻP x T1), with
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(a)
fmax = maximum cycle frequency (recommended: 1 cycle/30s)
ǻP = difference between unloading pressure and loading pressure in bar
T1 = compressor air inlet temperature in K
T0 = air receiver temperature in K
Water flow and pressure to be adjusted depending upon local
conditions. For cooling water quality see section Cooling water
requirements.
A water shut-off valve and water drain valve should be installed by the customer in the
compressor water inlet pipe and outlet pipe. If water shut-off valves at the compressor
water inlet and outlet pipe are installed, a safety device with set pressure according to
the maximum cooling water inlet pressure (see section
Reference conditions and
limitations) has to be installed between the compressor water outlet pipe and shut-off
valve. When operating the unit, the operator must ensure that the cooling water system
cannot be blocked. The above-mentioned applies also to the energy recovery cooling
water system. Remove the plastic plugs (if provided) from the compressor water pipes
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