Reference
Designation
(1)
Customer’s installation
(2)
Dryer option
(3)
For modbus communication
(4)
Star connection: all other voltages
(5)
IT version star connection: all other voltages
Description
1. Provide an isolating switch.
2. Check that the motor cables and wires inside the electric cabinet are clamped tight to their terminals.
3. Check the fuses. See section
Settings of fuses.
4. Connect the power supply cables to terminals (1, 3 and 5) on contactor (K21).
5. Connect the earth conductor to the earth bolt (PE).
6.4
Cooling water requirements
General
Following requirements are given as a general rule to prevent cooling water problems. If in any doubt, consult
Atlas Copco.
Recommended maxima
Recirculating system
Pass-through system
Chloride (Cl
-
)
less than 600 mg/l
less than 150 mg/l
Sulphate (SO4
--
)
less than 400 mg/l
less than 250 mg/l
Total solids
less than 3000 mg/l
less than 750 mg/l
Suspended solids (as SiO
2
)
less than 10 mg/l
less than 10 mg/l
Free chorine (Cl
2
)
less than 4 mg/l
less than 2 mg/l
Ammonia (NH
4
+
)
less than 0.5 mg/l
less than 0.5 mg/l
Copper
less than 0.5 mg/l
less than 0.5 mg/l
Iron
less than 0.2 mg/l
less than 0.2 mg/l
Manganese
less than 0.1 mg/l
less than 0.1 mg/l
Oxygen
less than 3 mg/l
less than 3 mg/l
Carbonate hardness (as CaCO
3
)
50-1000 mg/l
50-500 mg/l
Organics (KMnO
4
)
less than 25 mg/l
less than 10 mg/l
No algae
No oil
Remark
Chloride and sulphate are interactive. In pass-through systems the sum of the squares 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.
Instruction book
76
2920 1634 04
