Maintenance - Dennerle Osmose Professional 190 Bedienungsanleitung

7 Maintenance

The Dennerle osmosis system is virtually maintenance-free. To ensure a long membrane life, it is important to remove
the residues that build up on any osmosis membrane over time by means of regular rinsing. If the membrane is not
rinsed regularly, lime scale will become deposited on the membrane surface, which will result in diminished perfor-
mance and premature failure of the system.
We therefore recommend rinsing the membrane for a few minutes before and after each osmosis water
production. As a general rule, the harder the water, the more often and longer flushing of the membrane is required
to ensure consistently high performance.
Rinsing the membrane:
• Osmosis 190 + 380: Open the rinsing valve during operation. Close again after the flushing process.
• Osmosis 130: Close the water tap. Remove the flow limiter from the residual water hose (see also item 10).
Open the water tap and carry out the rinsing process. Then reconnect the flow limiter.
8 Replacing the membrane
If used properly, the modern Dennerle polyamide/polysulphone membrane will have a service life of 3-8 years. The
service life depends in particular on the quality of the tap water, the operating conditions, the intensity of usage,
membrane care by means of regular rinsing as well as the timely replacement of the pre-filter.
The membrane should be replaced if
(1) the conductivity or hardness of the osmosis water is greater than 25 % of the tap water, or
(2) the produced osmosis water drops to below 70% of the original amount, despite otherwise correct use
(temperature, pressure, filter not blocked). Before measuring these values, the device should have been rinsed
for 15 minutes and have been in operation for at least 2 hours.
Replacing the membrane:
C
D
9 Replacing the fine filter or active carbon filter
9.1 Fine filter
3
You will notice whether the fine filter is blocked if the flow rate declines significantly.
Check fine filter:
• Detach the hose from the membrane housing cover (see also item 10).
• Turn off the tap.
• Detach the hose from the membrane housing cover (see also item 10).
• Unscrew the membrane container lid
Carefully remove the membrane using a pair of pliers.
• Lightly grease the two O-ring seals on the new osmosis membrane with Vaseline
(chemist). Insert the membrane (the two O-rings first) into the membrane container
as far as it will go (D).
• Likewise, lightly grease the O-ring for the membrane container lid with Vaseline.
Screw on housing cover tightly and reconnect hose (see also point 10).
• Turn on the tap and check that the device is watertight.
• Allow the new membrane to run for 2 hours. During this period, DO NOT use the
osmosis water. Then rinse the system for 15 min. as described under point 7 –
Maintenance.
using the spanner provided (C).
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