Technical Specifications
Equipment Review
The patented LiquiTech system consists of two basic components:
- The control unit acts as the power source stimulating the controlled release of ions from the copper/silver electrodes in the flow-cell.
- The flow-cell is connected to the controller and houses the copper/silver electrodes that release the ions as the water passes through.
Control Units
The LiquiTech Liquidator Series electronic control units incorporate a high speed switching power supply producing up to 10 amps at a powerful 100 volts DC, allowing it to perform under all types of water conditions without limiting its current output for lack of voltage. The control unit is flexible and capable of performing numerous functions as (see Control & Power Module block diagram).
The LiquiTech electronic control unit can be configured to control output current levels by multiple methods, which directly relates to amount of ions released into the water. Such methods include current set points which will maintain the current according to its set point indefinitely, internal timer functions which can be programmed for every day of the week to operate only at specific intervals, remote contact input such as a flow switch, and analog inputs from sources such as a flow meter or a copper analyzer. Should any user-configured trip points occur or failures be detected, two independent 120 volt 10 amp alarm relays are provided for remote functions.
LiquiTech systems can be configured, controlled and monitored from either the local control panel or remotely via 4 - 20 mA inputs and outputs or the RS232/RS485 serial communications ports. The LiquiTech faceplate can be set in lock-out mode preventing any unauthorized changes from the local control. Multiple systems can be networked over a common communications line for control and monitoring.
Additionally, a direct modem interface can also provide remote supervisory and control functions. The unit also has the ability to log data and create profiles for several parameters. The front panel display includes two reliable and easy to read Vacuum Fluorescent Display (VFD) modules. One 2 x 20 character VFD displays system status (i.e., output current, voltage and input copper level or gallons per minute flow). A second 4 x 20 VFD is used to program system functions such as alarms, current set point, internal clock, etc. Seven selectable inputs and up to four outputs are available at the LiquiTech control panel providing the ultimate flexibility in supervisory control.
Common to all control methods is the status LEDs and keypad functions. The status LEDs display positive output current, negative output current or deadband (no current) to the electrodes. Time in each cycle is factory adjustable. The LiquiTech unit switches polarity so that all electrodes wear evenly. The deadband allows the electrodes to remain cool and clean for an extended period of time.
The keypad is provided for local operation and set-up. A press of an arrow up or down on the keypad will adjust the set point accordingly and a scroll press will initiate the menu items that are active for the control method currently in use. When the desired selection is reached, the user presses the up or down arrow keys to change the setting and then when the desired setting is achieved the scroll key is pressed to accept the value and move to the next menu item.
When the bottom of the menu is reached the display will revert back to the normal or run display mode. The menu has a time-out feature, so if the unit was left in a menu item and not returned to the normal/run display mode, the display will revert back after five minutes of no keypad activity. The control unit will store the new parameters in non-volatile memory after the parameters have been modified.
The unit is housed in an industrial-grade, high-strength, corrosion-proof, NEMA 12 enclosure fabricated from 14 gauge steel with a textured powder coated finish. It has a locked, gasketed door with a full-face 3/16 inch tempered glass window for easy viewing of all control functions. The aluminum face is silk-screened and anodized. The door is attached by internal cad-plated steel hinges. All electronic components are overrated and of the highest quality. All circuit boards are conformal (corrosion-proof) coated. High-efficiency, low-heat toroidal power transformers are used. All switches are push-button type and non-corrosive. The user friendly silicone rubber keypad is a dual-durometer design, non-conductive with a protective coating. The switch positions have a tactile response using stainless steel domes rated for 5 million cycles.
Flow Units
The flow-cells housing the copper/silver electrodes are comprised of high temperature, high pressure, schedule 80 CPVC. Electrode spacers are fabricated from DuPont PBT polyester resin. The flow-cells are supplied with LiquiTech quick-connect stainless steel clamps for ease of installation. Flow-cells are available in various sizes and configurations depending upon the application. Standard 150-pound flanges with 304 stainless steal nuts, bolts and washers are also available. The entire LiquiTech Electronic Disenfection System including Controller, Flow-Cell and interconnecting wire is ETL (UL-508 and 1081) certified. LiquiTech products conform to the European Union EMC Directive 89/336/EEC and the Low Voltage Directive 72/23/EEC and bear the CE Mark.
