Atlas Copco GA132

2920 1251 02
24
Instruction book
Figure 10b shows pictographs which may be stuck on or inside
the bodywork:
23 Water outlet
24 Manual condensate drain
25 Water inlet
26 Automatic condensate drain
27 Switch off voltage and depressurize compressor before
maintenance or repair
28 Torques for iron (Fe) or brass (CuZn) bolts
29 Oil gasket, screw on filter and then tighten by hand (approx.
one half turn)
30 Before connecting compressor electrically, consult
Instruction book for motor rotation direction
31 Consult Instruction book before greasing
32 Switch off voltage before removing protecting cover inside
electric cubicle
33 Consult Instruction book before maintenance or repair
2.5 Cooling water requirements
For GA W, following requirements are given as a general rule
to prevent cooling water problems. If in any doubt, consult
Atlas Copco.
Recommended maxima - mg/l Recirculating Open
system system
Chloride (Cl
-
) . . . . . . . . . . . . . . . . < 600 < 150
Sulphate (SO
4
--
) . . . . . . . . . . . . . . < 400 < 250
Total solids . . . . . . . . . . . . . . . . . . < 3000 < 750
Suspended solids (as SiO
2
). . . . . . < 10 < 10
Free chlorine (Cl
2
) . . . . . . . . . . . . < 4 < 2
Ammonia (NH
4
+
) . . . . . . . . . . . . . < 0.5 < 0.5
Copper . . . . . . . . . . . . . . . . . . . . . < 0.5 < 0.5
Iron . . . . . . . . . . . . . . . . . . . . . . . . < 0.2 < 0.2
Manganese . . . . . . . . . . . . . . . . . . < 0.1 < 0.1
Oxygen . . . . . . . . . . . . . . . . . . . . . < 3 < 3
Carbonate hardness (as CaCO
3
) . . 50-1000 50-500
Organics (KMnO
4
Consumption) . < 25 < 10
Remarks
- No algae nor oil.
- Chloride and sulphate are interactive. In open systems
the sum of the squares of these values must not exceed
85,000. For recirculating systems with proper controls
and treatment, the sum of the squares may be up to 520,000.
Note that the sulphate value must include any sulphite
present.
Fig. 10b. Pictographs on/inside bodywork