10 Safety valve
11 By-pass system to by-pass the dryer during service operations (available as an option,
consult Atlas Copco).
12 On water-cooled compressors:
Water flow and pressure to be adjusted depending upon local concitions.
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 and connect the
pipes to the cooling water circuit.
13 Cooling air grating, dryer
Attention
Working with machinery controlled by a frequency converter requires special safety
precautions. These safety precautions depend on the kind of network used (TN, TT, IT
system). Consult Atlas Copco.
Instruction book
74 2920 1634 04
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