UK
17
11.
FUNCTIONAL
DESCRIPTION
The water is pressed through the
RO membrane by means of a
high-pressure pump. The per-
meate (desalinated water) is
then led to consumption and can
e.g. be collected in a reservoir.
The concentrate (the water con-
taining the concentrated salts) is
led to outlet. The relation be-
tween permeate/ concentrate
shall be adjusted manually on
the needle valve.
Under normal operating condi-
tions the RO membranes have a
long lifetime. But even with a
good feed water quality, layers
of impurities will, to a certain
extent, occur and there will be a
slow reduction of the permeate
capacity.
12.
REPLACEMENT OF
MEMBRANES
Read this chapter before dis-
mounting/replacing the mem-
branes.
Turn off the power and discon-
nect the water to the plant.
Dismount the U-lock placed at
the top of the membrane pipe.
(the U-lock keep the membrane
bottom in place).
Remove the pin in the U-lock
and pull the lock out of the pipe.
The end plates can now be
pulled out of the membrane
pipe by wriggling the end plates
from side to side and simultane-
ously pull upwards.
Note! it may be necessary to
use a puller to get the end plates
out of the membrane pipe. Or-
der a puller for a 4" membrane
pipe from your usual supplier or
from BWT.
The membrane can now be
pulled out of the membrane
pipe.
Note! at which end the big,
black
V-cup seal
, located on the
outside of the membrane is
placed. When the new mem-
brane is to be fitted, this
V-cup
seal
must be fitted at the same
end of the membrane as the
former one, i.e. if the
V-cup seal
is located at the top of the
membrane pipe, then the new
membrane
V-cup seal
shall also
be placed in that way, so that
the
V-cup seal
is located at the
top when the membrane is refit-
ted in the membrane pipe.
When all connections have been
refitted and the end plates se-
curely fastened with the U-lock,
then the plant must be started up
again.
Re-connect raw water.
Open the outlet valve completely
and close the recirculation valve
completely(section 13.7, pos.
1).
Lead the permeate hose to
drain.
Reconnect power to the plant.
The plant will now be in opera-
tion. Let the plant flush in this
way for 20-30 minutes.
Then adjust he outlet valve and
the recirculation valve.
Check the plant operating pres-
sure on the manometer.
Check that the water quality is
<20 µS/cm. This can be
checked on the permeate hose
(conductivity meter is optional
equipment). Lead the hose back
to the reservoir (option), when
the quality is satisfactory.
Check on the flow meter that the
plant capacity is satisfactory.
The plant is now in normal op-
eration and ready for use.
Make notes in the operating
journal:
1. Date of replacement of
membranes
2. New capacity on the plant,
flow meter FI1 and FI2 (13.7
Spare parts drawing Pos. 8)
3. Water quality, conductivity
meter (option)
4. Plant operating pressure,
Manometer PI1 (13.7 Spare
Parts drawing, Pos. 4)
5. Feed water temperature
6. Feed water pressure
Summary of Contents for PERMAQ PRO 2000
Page 2: ...UK 2...
Page 11: ...UK 11 Alarm Transport pump 9 2 4 Indication Level low 9 2 5...
Page 19: ...UK 19 13 1 P I Diagram...
Page 20: ...UK 20 13 2 Layout Drawings...
Page 21: ...UK 21 13 3 Wiring Diagram...
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Page 28: ...UK 28 13 7 Spare Parts Drawing...