HygroMatik WL-ROL 160-1200 Series, Руководство пользователя

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Page 35
9.4 Special maintenance and
repairs
9.4.1 Membrane exchange
The membranes undergo a natural decline in
performance over time, specifically:
• annual reduction in water produced of
7%
• annual increase in outlet water conduc-
tivity of 10%
After a certain period of operation, in relation
to the characteristics and volume of water
treated, the membranes tend to become
blocked, with a decline in efficiency. This
decline in membrane efficiency may depend
on two main factors:
• blockage due to precipitation of iron or
calcium sulphate and carbonate
• biological blockage
• infrequent replacement of the CBC
(carbon block fi lter)
Replacement becomes necessary when the
system shows variations in the following fun-
damental parameters (for the same initial
feed water temperature):
• decrease in water produced to a level
that is insufficient for the application
connected downstream of the reverse
osmosis system.
• excessive increase in the conductivity
of the water produced to a level that is
excessive for the application connected
downstream of the reverse osmosis
system.
Before replacing the membrane(s), check
the following:
• The ROL unit is switched off
• The inlet valve is closed, there is no
pressure on the water line.
The steps for membrane replacement are
described in detail in the
chapter mechani-
cal installation.
9.4.2 Replacing the metering pump
fuse
The fuse on the metering pump shows only
be replaced by specialist personnel. The
replacement procedure is as follows:
» Loosen the 2 screws in the upper
part of thepart of the pump
» Holding the pump, remove the 6
screws at the rear
» Slide out the rear part of the pump
until it is completely detached from
the front part, so as to access the
circuit at the front of the pump.
» Be careful with the spring on the
injection element shaft
» Locate the fuse and replace it with
an identical one
» Reposition the rear part of the pump
until it is completely coupled with the
front part
» Tighten the 6 screws on the pump
» Replace the pump in the unit and
tighten the two screws to the frame.
1 fuse 2 power supply
1
2