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.
