REVERSE OSMOSIS SYSTEMS RO 4... /E /EL - INSTRUCTIONS MANUAL
s.r.l.Milano - ITALY
Page 19 of 25
ro4e_mi-r10.doc -
r. 10
CAUTION:
The treated water (
permeate
) supplied during the first hour of working of the
system must not be used, since it can still contain residual of preservative
chemical. When this solution will be completely flushed away,
the valve V3
can be turned on normal working position (the permeate flow is diverted to
the storage tank).
NOTE :
The best ratio treated water/drain water (permeate/concentrated) can be decided
according to the characteristics of raw water.
The higher is the value of the ratio, the higher is the risk of membrane fouling, furthermore
if the hardness of raw water is high.
However, even if the raw water is soft (naturally or processed by a softener), it is
recommended that the above concentration ratio should not be higher than 1 (permeate =
concentrated)
NOTE :
Normally, the longest life of the membrane depends on the lowest working pressure, with
same other operating conditions. Therefore, should the quantity of treated water
(permeate) is satisfactory, the system can work at a working pressure lower than the
stated one.
Once the plant is running on automatic mode, it is necessary to verify again that all the
operating parameters of the system meet the rating values (flow rates, pressure,
conductivity).
6.1. Resuming table of the factory settings
Conductivity-meter setting :
value reading/set
•
scale range (parameter P01)
23 (0-200 µS/cm) conductivity-meter
•
working mode (parameter P06)
1 conductivity-meter
•
value for high-conductivity K1
(parameters P07=P08)
40 (µS/cm)
conductivity-meter
Pressure switch PC setting :
bar
reading
•
value for minimum pressure alarm
0.8 PC-M2
Flow sensors F1 and F2
setting :
DN
K
flow
rate
•
flow sensors F1 and F2
20 75.25
l/h
25
52.91
l/h
