HygroMatik WL-ROL 160-1200 Series, Manual

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Page 36
9.5 Maintenance scheme
9.5.1 Daily maintenance
» Check if the system is working cor-
rectly.
» Check that there are no leaks in the
water-carrying components.
» Check the water inlet pressure.
The system supply pressure (after the pre-fil-
ters) must be at least 2 bar during normal
operation. Replace the filter cartridges if the
pressure loss is too high.
9.5.2 Weekly maintenance
» Check the max. membran pressure
(max.10 bar!).
» Check the water conductivity of the
permeate with the control unit.
» Note down the data for the listed
tests
• Note that the production quantity of the
permeate increases with rising water
temperature, while the quality of Per-
meate is decreasing. Conversely, the
production quantity decreases with
decreasing temperature, while the
quality of the permeate improves.
• The indication of the measured perme-
ate conductivity value on the display of
the control unit settles down to the
actual value within the first minutes.
9.5.3 Maintenance every two months
» Check that there is not too much
free chlorine at the outlet (less than
0.25ppm).
Replace the pre-filter cartridge::
» Every 2 months if the free chlorine
content is between 0.1 ppm and 0.2
ppm.
» Every 4 months if the free chlorine
content is less than 0.1 ppm.
The lifetime of the pre-filter and membrane(s)
depends on feed water quality and permeate
production rate.
Maximum permitted storage times of the
membranes:
• 6 months: if the membranes are
already supplied with a chemical solu-
tion and/or impregnated with glycol;
• 1 year: if the membranes are supplied
dry or vacuum packed.
9.5.4 Maintenance by qualified per-
sonnel
every 6 months:
Check the pre-filling pressure of the expan-
sion vessel. This value must be 1.5 to 1.8
bar. To check the pressure, the outlet line of
the vessel must be temporarily interrupted.
Generally:
» Check the parameters of the water
entering the system.
» Check the conductivity of the input
water and permeate with a conduc-
tivity meter.
» Record the data for the listed tests.
NOTICE
NOTICE
NOTICE
NOTICE