V/D
S
ERIES
M
ECHANICAL ASSEMBLIES
Revision: 2.1 3-57
Replacing the sterile air filter
Service interval Annual maintenance
Necessary tools 17 mm spanner
Have available Teflon tape or white adhesive for plastic threads
(item no. 11920)
• Replace the sterile air filter and seal the new filter with Teflon tape or
white adhesive.
Measuring the flow
(Only for water cooling with or without support air, see chapter 3.7.1
oben.)
Have available Flask marked in litres
The water flow should measure approx. 2 litres/min. This measurement
should only be made when the cooling coil is completely filled with water,
which may take several minutes.
• In the Service -> Manual output set menu, activate the
WaterToCoil output.
• Feed the hose from the drain into the flask.
• Determine the flow rate.
If the flow rate is less than 2 litres/min., then this may be caused by the
following:
− Untreated water pressure on-site is too low.
− Pressure reducer (PR2) not working correctly.
− Scaling on the cooling coil.
Remedy:
− Check the untreated water pressure on-site and take remedial
action, when necessary.
− Check the pressure according to the pressure reducer (PR2) and
readjust or replace it, if necessary.
− After points 1 and 2 have been ruled out as the cause, the flow rate
can be set to the correct value by readjusting the needle valve (N2).
The cooling coils can only be replaced at the factory!
If the needle valve has to be opened further, then this indicates
scaling on the cooling coil. Descale the cooling coil (instead of
opening the needle valve repeatedly) in order to avoid costly
repairs at the factory.
• Suggest the installation of a water softener system to the operator, as
this prevents scaling on the cooling coil.
To Next Page
Loading...
