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 14 of 25 ro4e_mi-r10.doc - r. 105.3. Logic of working5.3.1. LevelsWhether level switches are installed inside the storage tank and are connected to the controlboard, as previously mentioned, the stop and starting of the high pressure pump P isautomatically controlled by the medium-maximum level switches.Whether only one level switch ON-OFF is available, it is connected as a max level (LH); itmeans that the closing of the contact stops the pump P.It is allowed to manually force the start of water supplying, even if the level mark is notbelow the threshold LL, by pushing the function button of the programmer.Proceed as follows to use the function buttons (see also the chapter “ How to use thefunction buttons of the programmer”)• push several times the button until the notice ESC+C…is visualized on the display.• push and keep pushed the button ESC and immediately after that the desired functionbutton ()WARNING • by pushing the button ESC and not the function button within 2 seconds,the display skips to the visualization of modification menu; release andthen push again the button ESC to go back to visualization ESC+C…The water supplying will automatically stop when the water reaches the max level LH.In order to stop the working of the pump before that the level is reached, and featuring theflushing, push the function button same way as per above description.In order to stop the working of the pump before that the level LH is reached, but not featuringthe flushing, turn temporarly the mode selector on “RESET” position.The visualization of "NO water request” on the display of the programmer indicates that thereis not request of water supplying by level switches.The sequence of automatic start-stop of the water supplying, driven by level switches, is thefollowing :• water supplying request• opening inlet solenoid valve EI• wait …(factory set 5 seconds)• start working of pump P• water supplying …..stop water supplying request• closing of solenoid valve EI (only if solenoid valve EIF is installed)• opening flushing solenoid valves EF (and EIF, if installed) for the pre-set time• switching off pump P, closing EI, EF (and EIF, if installed) |
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