Knurr CoolTrans 50kW Bedienungsanleitung Seite 28

CoolTrans 50 kW
Manual / Bedienungsanleitung
max. operating excess
pressure 3 bar
(Type N: in known version until
approx. May 2000,
then incorporated into EU
version max. operating excess
pressure 6 to 10 bar, from 50
litres)
max. operating temperature
393 K (120°C)
max. temperature lkoad on
membrane 343 K (70°C)
Fig.: Cross-section of the membrane extension tank
Safety valve
Cap valve
CoolTrans 50
Safety valve
The operating pressure of the secondary cooling water network shall at least be
5% below the closing pressure of the safety valve (3.0bar).
By means of airing, the valve should at least once annually be checked for
functionality.
Prior to dismantling, please take care that the safety valve is pressure-relieved.
Annual maintenance requires checking the admission pressure in the
extension tank.
For this purpose, the connection of the water-side to the extension tank must be
drained.
Remove the lead seal from the cap valve, remove the cap and close the valve by
turning it down by means of a hexagon socket spanner.
Now the membrane extension tank is separated from the cooling water system.
Subsequently open the drain valve. Then check the admission pressure by
means of a pressure gauge, compare it with the pressure specified on the device
label and, if necessary, fill up with nitrogen. After pressure testing, slowly open
the cap valve. As soon as water flows out of the drain valve, close it again. After
that the cap must be put on again and newly lead-sealed.
01.998.360.0 / Ausgabe -
Fill-in valve with protective cap
Gas space
Membrane
Water space
Water connection
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