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Instruction book
3.7 Stopping
1. Press stop button (9-Fig. 3.5). LED (1) goes out. The
message <<Programmed stop>> appears. The compressor
runs unloaded for 30 seconds and then stops.
2. To stop the compressor in case of emergency, press button
(S2-Fig. 3.5). Alarm LED (3) blinks. After remedying the
fault, unlock the button by pulling it out. 9)
3. Close air outlet valve (3-Fig. 3.3). 3)
4. Open condensate drain valves (1 and 2-Fig. 3.4). 2)
5. On GR W, close the water shut-off valves 3).
6. On GR W, if the compressor is installed in a room where
freezing temperatures are expected, drain the cooling
system by opening the drain valves in the water inlet and
outlet pipes (customer's installation).
7. Switch off the voltage.
Important
-
After pressing stop button (9), the compressor will run
unloaded for 30 seconds. The compressor stops after this
period. A start command during this period is ignored.
-
After stopping, the compressor is prevented from restarting
within a programmable time (20 seconds). A start command
given during this minimum stop time will be memorized;
automatic operation LED (1) lights up. The compressor
will start when the minimum stop time has run out.
Example: ambient temperature 22°C, relative humidity 100 % and working pressure 20 bar(e). The minimum allowable
temperature at the outlet of the compressor elements is 85°C. Regulate the cooling water flow to obtain a temperature between
87 and approx. 92°C at the outlet of the compressor elements.
Fig. 3.6 Minimum allowable air temperature at outlet of compressor elements (for water-cooled compressors)
