Nobel RO 406 /E Installation Operation & Maintenance
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REVERSE OSMOSIS SYSTEMS RO 4... /E /EL - INSTRUCTIONS MANUALs.r.l.Milano - ITALY Page 17 of 25 ro4e_mi-r10.doc - r. 105.3.7. Working of the pumpThe control system should receive the feed-back from the contactor of pump P that the pumpis ON, when it should be ON (automatic command).Otherwise, the alarm acts, 3 seconds delayed, and it also switches the block of the wholesystem.The alarm and its block can be reset only by turning, even momentarily, the pumpmode selector on "RESET".5.3.8. Remote alarmThe mentioned alarms, besides their visualization, also drive a relays with a free voltagecontact for remote alarm (see electrical wiring connections).5.3.9. Optional features (available upon request)5.3.9.1.Flushing with RO treated waterThe 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 tobe connected to the storage tank of RO treated water.The flushing works the same way of standard system, only using RO treated water, throughthe 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 duringautomatic flushing as well as by pushing the button “FLUSHING”.5.3.9.2.Control of dosing pumpWhether requested, a selector "AUT-0-MAN" (DOSING) is available on the front of controlpanel; 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 inletsolenoid valve EI is open.- If “MAN" position is selected, the dosing pump starts to work regardless of any otherenabling 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 controlpanel stops the working of the pump acting the same way of the minimum level switch into thechemical storage tank ; indeed, the enabling of the control panel is connected on parallel to thelevel switch.In the case two dosing pumps are used and must be controlled, the second contact of relaisR1 (not available in the terminal board) must be used, to control the second dosing pump.WARNING : switch off the power supply before making anyoperations on the terminal board of the dosingpumps. |
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