REVERSE OSMOSIS SYSTEMS RO 4... /E /EL - INSTRUCTIONS MANUAL
s.r.l.Milano - ITALY
Page 17 of 25
ro4e_mi-r10.doc -
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5.3.7. Working of the pump
The control system should receive the feed-back from the contactor of pump P that the pump
is ON, when it should be ON (automatic command).
Otherwise, the alarm acts, 3 seconds delayed, and it also switches the block of the whole
system.
The alarm and its block can be reset only by turning, even momentarily, the pump
mode selector on "RESET".
5.3.8. Remote alarm
The mentioned alarms, besides their visualization, also drive a relays with a free voltage
contact for remote alarm (see electrical wiring connections).
5.3.9. Optional features (available upon request)
5.3.9.1.Flushing with RO treated water
The flushing feature runs using RO treated water, instead of raw water.
An inlet line
IF
is available on the system, complete with a solenoid valve (
EIF
), and it has to
be connected to the storage tank of RO treated water.
The flushing works the same way of standard system, only using RO treated water, through
the solenoid valve
EIF
, instead of raw water; the valves
EF
and
EIF
open and, in the same time,
the inlet solenoid valve
EI
of the raw water is closed. This features works the same way during
automatic flushing as well as by pushing the button “FLUSHING”.
5.3.9.2.Control of dosing pump
Whether requested, a selector "AUT-0-MAN" (DOSING) is available on the front of control
panel; it is related to the control of the working of a dosing pump :
-
If “AUT" position is selected, the dosing pump automatically starts to work when the inlet
solenoid valve EI is open.
-
If “MAN" position is selected, the dosing pump starts to work regardless of any other
enabling signals.
-
If “0" position is selected, the dosing pump does not start to work.
The dosing pump must be wiring connected to a power supply, the enabling of the control
panel stops the working of the pump acting the same way of the minimum level switch into the
chemical storage tank ; indeed, the enabling of the control panel is connected on parallel to the
level switch.
In the case two dosing pumps are used and must be controlled, the second contact of relais
R1 (not available in the terminal board) must be used, to control the second dosing pump.
WARNING :
switch off the power supply before making any
operations on the terminal board of the dosing
pumps.
