GA 12.137/2.02 - 05/2002
Installation
13
2.4 Ambient conditions and
coolant connection
Ambient temperature
The ambient temperature must be between 5 °C and 40
°C (40 °F to 104 °F) when the compressor unit is in ope-
ration.
Ambient air pressure
The minimum ambient air pressure is 700 mbar (700
hPA, 10 psi).
Coolant data
Coolant inlet temperature 5 to 25 °C
Permissible connected
coolant pressure < 8 bar (116 psig; 0.8 MPa)
Min. inlet pressure 2 bar (abs)
Min. absolute pressure at coolant outlet 1 bar
(atmospheric pressure)
Coolant port, hose nipples DN 12
for hoses with an inner diameter 1/2“ (12 mm)
Hose clamp range 1/2 to 1
1
/
8
“ (12 to 28 mm)
Alternative coolant port:
outside threads G
1
/
2
“
Coolant consumption
at 25 °C inlet temperature 5 l/min
Max. coolant throughput 10 l/min
Pressure drop ∆p between coolant inlet
and outlet depending on the throughput 0.2 to 0.6 bar
Water quality
Appearance Colorless, clear, free of oils and greases
Suspended matter < 250 mg/l
Particle size < 150 µm
Electrical conductivity < 500 µS/cm
pH value 7 to 8.5
Total hardness (total alkaline earths) < 20 °dH
Acid capacity up to pH 4.3 2.5 to 3.5 mmol/l
Carbonate hardness 7 to 10 °dH
Aggressive carbon dioxide None, not detectable
Oxygen 4 to 5 mg/l
Chloride < 100 mg/l
Sulfate < 70 mg/l
Iron < 0.2 mg/l
Manganese < 0.1 mg/l
Ammonium < 10 mg/l
Free chlorine < 0.2 mg/l
20 °dH (degrees German hardness) = 3.5 mmol/l
= 25 °e (degrees English hardness)
= 36 °f (degrees French hardness)
= 21 °a (degrees American hardness)
Caution Failure to comply with the coolant data may
lead to internal corrosion. This will result in
destroying the compressor unit.
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