Instruction book
2920 1472 03
50
3.3.2 On compressors with an IMD dryer (Fig. 1.5)
-
The dewpoint of the air leaving the dryer will be higher than normal after starting. The normal
operating condition will be reached after approx. 15 minutes.
-
Avoid short loading periods and operation at very low working pressures as the performance
of the dryer will diminish. Avoid operation at too low a regeneration air inlet temperature
(minimum 130°C).
By-pass operation of the dryer
1.
Stop the compressor and close the air outlet valve.
2.
Close the dryer outlet valve (10-Fig. 1.5).
3.
Open the dryer by-pass valve (9-Fig. 1.5).
4.
Close the dryer inlet valve (7-Fig. 1.5).
5.
Close the regeneration air shut-off valve (2-Fig. 1.5).
6.
Depressurize the dryer by opening the drain valve (8-Fig. 1.5) and by pressing the test buttons
(Fig. 1.8) on the electronic water drains until all air has escaped.
7.
Start the compressor and open the compressor air outlet valve.
3.4 Stopping (Fig. 3.4)
1.
Press the test button on top of the drains to discharge condensate.
2.
Press stop button (9): the compressor will stop and LED (8) will go out.
3.
On compressors with an IMD dryer
, close the dryer outlet valve (10-Fig. 1.5).
4.
Close the air outlet valve (customer’s installation).
5.
In case of emergency, press emergency stop button (S3) to stop the compressor immediately.
6.
Open the manual condensate drain (1-Fig. 3.5).
On compressors with an IMD dryer
, also
open drain valve (8-Fig. 1.5).
7.
On ZR
, close the cooling water inlet valve (customer’s installation).
3.5 Taking out of operation
At the end of the service life of the compressor, proceed as follows:
1.
Close the air outlet valve and stop the compressor. Press the test buttons (Fig. 1.8) on top of
the electronic water drains to depressurize and open the drain valve (1-Fig. 3.5). If an IMD
dryer is installed, open drain valve (8-Fig. 1.5).
2.
Switch off the voltage and disconnect the compressor from the mains.
3.
Shut off and depressurize the part of the air net which is connected to the outlet valve.
4.
Disconnect the compressor air outlet pipe from the air net.
5.
Drain the oil and condensate circuits.
6.
Disconnect the compressor condensate piping from the condensate drain net.
7.
On ZR
, drain the cooling water circuit and disconnect the cooling water pipes from the
compressor.
