ABB ACS880-87LC-4000A/4021A-7, Hardware Manual

Page: 137 / 144

Cooling and heating 137
Nominal pressure difference: 110 kPa / 120 kPa (hydrostatic)
Maximum pressure difference: 170 kPa / 180 kPa (hydrostatic)

Water quality

Freeze protection and corrosion inhibition
WARNING! Pay special attention to the composition of the coolant. Use the
water-coolant mixture specified by ABB in the internal cooling circuit. Adding any
other ingredient to the coolant may cause corrosion or dissolution of gaskets or
adhesives used in couplings. It may also affect the viscosity of the coolant and degrade
the cooling capacity of the cooling circuit and thus the load capacity of the drive. THE
WARRANTY DOES NOT COVER DAMAGE OCCURRING FROM USE OF IMPROPER
COOLANT.
Coolant concentration
ABB recommends diluting coolant 50:50 with water. Note that the concentration of coolant
should not be less than 33% and not more than 60%. Following table shows how the
diluting portion effects to frost protection.
WARNING! Operation at liquid temperatures below 0 °C (32 °F) is not permitted
even with antifreeze.
Liquid mixture quality
The pH level of the coolant must not be manipulated by adding chemicals not specified in
this document. This may build up sediment in the liquid.
Tap water
The use of drinking water without gas/bubbles is allowed as follows:
• The water must fulfill the requirements of the Council Directive 98/83/EC of 3/11/98 on the quality of water
intended for human consumption.
Note: The following requirements apply to the water to be used in the coolant, not the water-glycol-inhibitor
mixture.
pH value
6.0…8.0
Chloride < 50 mg/l
Fluoride < 50 mg/l
Sulphate < 100 mg/l
Total dissolved solids < 200 mg/l, no deposits are allowed at the tempera-
ture of +57 °C (153 °F)
Total hardness as CaCO
3
< 250 mg/l
Conductivity < 400 µS/cm (this equals the resistance of >
2500 ohm/cm)
The water must be clean of solid matter. The use of purified water which is not intended for
human consumption is forbidden.
Frost protection down to Coolant concentration Water concentration
-20 °C (-4 °F) 33% 66%
-27 °C (-16.6 °F) 40% 60%
-38 °C (-36.4 °F) 50% 50%
-54 °C (-65.2 °F) 60% 40%