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Instruction book
2.5 Cooling water requirements
The cooling water quality must meet certain minimum
requirements.
No general recommendation can encompass the effects of all
combinations of the various compounds, solids and gases
typically found in cooling water in interaction with different
materials.
This recommendation is a general guide line for acceptable
coolant quality.
2.5.1 Type of the system
Closed system
In a closed system, the same cooling water is circulating through
a system without contact with air.
Open system
An open system is a pass through system, or a circulating system
with a cooling tower. In the latter case, the composition of the
water that enters the cooler must be considered, and not the
composition of the make-up water. Due to the evaporative effect
in the cooling tower, much higher concentrations of ions can
be obtained in the circulating water than in the make-up water.
Fig. 2.6 Pictographs, other locations (typical examples)
13 Automatic condensate drain
14 Automatic condensate drain for optional oil/water
separator (type OSD)
15 Manual condensate drain
16 Stop the compressor before maintenance or repair
17 Warning: under tension
18 Read Instruction book before starting the compressor
19 Switch off the voltage and depressurize the compressor
before maintenance or repair
20 Before connecting the compressor electrically, consult
the Instruction book for the motor rotation direction
21 Torques for steel (Fe) or brass (CuZn) bolts
22 Consult the Instruction book before greasing
23 Switch off the voltage before removing the protecting
cover inside the electric cabinet
24 Oil the gaskets, screw on the filters and tighten by hand
(approx. one half turn)
25 Consult the Instruction book before maintenance or
repair
26 Cooling water inlet
27 Cooling water outlet
28 Oil outlet
Figs. 2.5 and 2.6 Pictographs
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