Procedure
1. Remove the protective cap from the exhaust connection.
2. Connect the exhaust line with the exhaust connection.
3. Route the piping downwards from the vacuum pump, to prevent condensate return.
5.4 Connecting the cooling water supply
NOTICE
Property damage as a result of missing cooling
Inadequate cooling may cause damage to the screw pump.
► Make sure that all conditions are met at the cooling water connection.
► In case of operation with heat exchanger, check the cooling liquid level and top up with cooling
liquid as required.
Prerequisites
● Cooling water connection unpressurised
● Cooling system evacuated
1
2
3
Fig. 5:
Cooling water connection with plate heat exchanger
1 Heat exchanger
3
Cooling water inlet
2 Cooling water outlet
Connecting the cooling water supply with heat exchanger
1. Connect the cooling water inlet and the cooling water outlet with the water supply.
– Connection size: 1/2" thread, ISO 228-1
2. Open the water inflow.
Parameter
Cooling water
Feed capacity
2 – 4 l/min
Water pressure
1000 – 6000 hPa
Feed temperature
10 – 25 °C
Necessary differential pressure between flow and return flow
≥ 500 hPa
Appearance
● filtered
● mechanically clear
● visually clear
● no turbidity
● no sediment
● free from grease and oil
Hardness
< 90 mg/l (ppm)
pH value
7 – 8
Particle size
< 200 µm
Chloride content, max.
< 100 mg/l
Electrical conductivity, max.
≤ 100 µS/cm
Installation
23/70
