Carel Large ROL 160-1K2 - 11. Control System; Control Panel and Operation States

37
ENG
Control
WTS LARGE +0300131IT rel. 1.0 - 05.09.2022
The whole operation of the reverse osmosis unit ROL is controlled by a microprocessor.
The control-system enables the production process and the control of the RO-unit.
The measured values are shown on a LC-display. The control has the protection class IP65.
10.1 The control panel
The control panel is separated into three zones:
• the 2 operating keys ESC, 
• the 4 arrow keys
• LC-display
The operating keys are used to navigate through the menus and submenus. The function of the keys is:
ESC: Cancel or return to the previous level
éêArrow keys: Move within a menu, a submenu or a selection list
 : Acceptance and storage of a selected setting
By pressing the arrow keys
éê you can call up the read values:
• Permeate conductivity
• Operating hours
• Remaining time (hours) until the next service
Access to the main menu:
» press  or about 2 sec, the display shows “PASSWORD 0000“
» enter the password using the arrow keys (0077)
» confirm with
The control system regulates the automatic sequence for start-up, production, process shut-down, as well as for
periodic rinses by controlling the following actuators:
• Feed water valve (VFEED)
• Permeate ush valve (VPER)
• High pressure pump (PHP)
• Dosing pump Antiscalant (PASC)
• Fault signal/alarm (potential-free changeover relay)
The controller is equipped with the following digital inputs for monitoring the process:
• Overpressure switch (PSHIGH)
• Low pressure switch (PSLOW)
• Level of permeate vessel low (PSMin)
• Filling level permeate vessel full ( PSMAX)
• External stand-by signal (INSB)
• Error dosing pump antiscalant (INPASC)
• Malfunction feed water pre-lter (INFIL)
Furthermore, the controller has a conductivity measurement (not temperature compensated) for monitoring the
permeate quality, with a freely adjustable limit value.
This means that the unit is switched off and a fault message is output if the limit value of the permeate conductivity is
exceeded during operation.
Fig. 10.a
11. CONTROL