REVERSE OSMOSIS SYSTEMS RO 4... /E /EL - INSTRUCTIONS MANUAL
s.r.l.Milano - ITALY
Page 9 of 25
ro4e_mi-r10.doc -
r. 10
5. Control
panel
The control panel
QE
, handled by a logical programmer, controls the automatic and/or
manual working of the whole system.
For safety sake, when the high pressure pump P is on working, the inlet solenoid valve
EI
is
open (except during the flushing with RO processed water, during which the solenoid valve
EIF
is open), both automatic and manual working as well. Hence, in this manual, any time the
working of the high pressure pump P is mentioned, it is understood that the inlet solenoid valve
EI
is open,
The starting of the pump is some seconds delayed than the opening of the solenoid valve
EI
.
5.1. Commands and visualizations
(see diagram FRONT OF CONTROL PANEL)
The instruments available on the control panel are :
CONDUCTIVITY-METER
the instrument continuously shows the conductivity of the treated
water (permeate).
When the conductivity of treated water overpasses the set-point value
(set-point K1), the high conductivity alarm is switched on.
LOGICAL
PROGRAMMER LOGO
the programmer that handles the logical working of the unit.
Its display shows the status of the inputs and outputs and allows to
modify the pre-set time of the used timers (see special chapter for
details).
The commands available on the front of control panel
QE
are :
"EMERGENCY STOP "
It is placed on the top side of the control panel; pushing the button
any working of the system is blocked. To re-start the system, turn
counter clock-wise the button, for approx. 30º.
SELECTOR "MODE"
“AUT-RESET-MAN”
it controls the working of the system
on
“AUT”
the RO system supplies water according to the levels mounted inside
the storage tank of permeate. The correct working requires also the
external enabling signal (on terminals 9 and 10, timer or jumper) and
the one of the minimum pressure switch
PC
on
“MAN”
the pump
P
works and solenoid
valve
EI
opens, regardless of any
enabling signals
on
“RESET”
the blocks caused by the alarms are cancelled; the system is not
running.
BUTTON "FLUSHING"
It is connected to the working of the flushing solenoid valve
EF
(and
EIF
if installed). When the button is pressed, the solenoid valves
open; when the button is released the solenoid valves close.
The synoptical panel shows graphically the installed items; when one of them is activated,
the correspondent led is ON. For the pressure switch, when its led is ON, it means that the
pressure
overpasses
the adjusted set-point.
For the valve
EF
, when its led is ON, it is also understood that the valve
EIF
, if installed, is
open.
