User manual

Industrial Air Division
2920 1163 04
16
11. Switch on the voltage. If the yellow LED of relay (K25-Fig. 5) 1)
is alight, start the compressor. Check the rotation direction of
the motors. When facing the drive end shaft of the motors, the
correct rotation direction is:
- counter-clockwise for the fan motor (M2-Figs. 2) 2)
- counter-clockwise for the compressor motor (M1-Figs. 2)
(except for GA30 7 bar (50 Hz) and GA37 10 bar (50 Hz):
clockwise)
If the rotation direction is wrong, consult section 1.5.
12. Check the programmed settings. 3)
13. Start and run the compressor for a few minutes. Check that the
compressor operates normally.
1) Not installed on later production compressors, consult section
1.5.
2) Air-cooled compressors only.
3) Consult the User manual for the electronic regulator, sections
regarding the submenus "Measured data", "Service", "Modify
settings", "Timer" and "Programmable settings".
2.2 Before starting
If the compressor has not run for the past 6 months, it is strongly
recommended to improve the lubrication of the compressor
element at starting: remove bolts (7-Fig. 14b), lift unloader (UA)
and pour 3/4 l of oil into the compressor element. Reinstall the
unloader.
1. Check the oil level (Gl-Fig. 12). The pointer should be in the
upper field of the green range or in the HIGH range. If the
pointer registers in the LOW range, depressurize the oil system
(by unscrewing oil filler plug (FC) one turn) and add oil until the
level reaches the filler plug. Tighten the plug.
2. If necessary, empty the dust trap of air filter (AF-Fig. 2a).
3. If the red part of the air filter service indicator (VI-Fig. 14b)
shows full out, replace the air filter element (see section 4.1).
On water-cooled compressors also:
4. Check that the cooling water drain valve (customer's
installation) is closed.
5. Open the cooling water inlet valve (customer's installation).
6. Open the water flow regulating valve (customer's installation).
This step can be overlooked if, after previous operation, the
setting of this valve has not been disturbed.
Remark
It is possible to remotely control following functions:
Function Action (see strip 1X1-Fig. 5)
Remote start/ Connect a remote start button between terminals 30
programmed and 31. Connect a remote stop button between
stop terminals 30 and 32. Bridge terminals 30 and 34.
Close switch CMS2.
Remote load/ Bridge terminals 30 and 35. Connect a load/unload
unload switch between terminals 30 and 34. Close switch
CMS2
2.3 Starting (Fig. 7a)
1. Switch on the voltage. Check that voltage on LED (2) lights up.
The message compressor off appears.
2. Open air outlet valve (AV).
3. Close condensate drain valve (Dm-Fig. 3).
4. Press start button I (8). The compressor starts running and
automatic operation LED (1) lights up. Ten seconds 1) after
starting, the compressor motor switches over from star to delta.
At the same time 1) the compressor starts running loaded. The
message on display (4) changes from Auto unloaded to Auto
loaded.
1) Programmable. See the User manual for the electronic
regulator, section "Programmable settings".
FN1. Condensor fan
M1. Refrigerant compressor
M2. Motor, condensor fan
MT. Moisture trap
S3. Condensor fan control switch
5. Air/air heat exchanger
6. Air/refrigerant heat exchanger
7. Liquid separator
8. Refrigerant/refrigerant heat ex-
changer
9. Condensor
10. Liquid receiver
12. Filter
13. Data plate
Fig. 9. Air dryer on Full-feature compressors