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R911370699 | PS6000/PRC7000 with water cooling
6
Coolant
Recommended values for water quality in the case of operation with untreated
water.
If the untreated water used in the temperature control circuit complies with the
following recommended values, it can normally be used without special treatment.
It is recommended to observe and periodically check these values for the
protection of the plant.
Coolant definition
Tab. 4:
Name
Quality of coolant properties
pH value
7.5 - 9
Total hardness
< 17° dH
Conductivity
< 800 µS/cm
Temperature cooling water
< 50 °C
Chlorides
< 75 mg/L open circuit
< 50 mg/L closed circuit
Oxygen
< 10 mg/L
Ammonium
not verifiable
Flow velocity
< 2m/sec
Bacterial count
< 1000 KBE / ml
Water pressure
max. 10 bar
Nitrates
Max. 10 mg/l
Sulphates
Max. 100 mg/l
Insoluble substances
Max. 250 mg/l
As a rule, tap water meets these requirements.
However, an anti-algae agent must be added
Destruction possible of heat sinks and connections without suitable additions!
Loss of coolant liquid possible!
A chemist on site has to recommend suitable additives depending on the
water quality.
Check water quality periodically.
Notes:
The values for conductivity and hardness indicated for the temperature range
above can normally only be reached by means of previous softening and
desalination.
Bosch Rexroth AG
CAUTION
29/35
Coolant
.
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