NexSys Boiler and Cooling Tower Water Treatment Controller Overview
- Each unit can control up to 2 cooling towers or up to 4 boilers simultaneously – lowering your capital cost for the entire site.
- Building Management System connectivity.
- You determine the inputs you need for your system, including: Conductivity, pH, ORP, Water Meters, Flow Switches, Trace Chemistry, and any 4-20 mA input.
- Six output relays are standard, and every NexSys may be expanded to ten output relays total.
- Sensor inputs connect to Smart Nodes – small circuit boards in a compact design.
- The nodes become an internal NexSys network that expands as you need it.
- The nodes can be located as much as 400 meters / 1300 feet from the NexSys controller– giving you flexibility and leveraging the power of this datalog water treatment controller.
NexSys Boiler and Cooling Tower Controller Updates
- In late 2020, Lakewood updated the graphical interface for the NexSys systems, giving a more modern appearance, and clarity to the user experience.
- We have also made some simplifications in the BACnet/IP interface, eliminating the need for external components for Building Management System integration.
Standard Features
- Color touch screen.
- Datalogging.
- Onboard graphs.
- Six output relays expandable to ten output relays for user configurable operations such as:
- Feed by percent of blowdown time
- Feed by setpoint with percent of time feature as part of spaced feed
- Trace chemistry control
- By makeup totalized gallons
- By blowdown totalized gallons
- By percent on-time
- By scheduled feed by day and time
- Up to eight active 4-20mA input readings
- 2 tower conductivity inputs
- 2 makeup conductivity inputs
- pH and ORP inputs
- Two flow switch inputs configurable to any relay output
- Two water meter inputs with field expansion capability to four
Additional Features
- LonWorks, MODbus, and BACnet communications interface
- Ethernet capability through an HTML interface
- The capability to send E-service reports to a subscribed service
- The ability to display operating values with time and date stamps on color coded graphs with zoom and scroll features
- Trace chemistry capable
- Enclosure is NEMA 4X rated
- Ability to add four digital inputs
- Ability to mount every sensor/input up to 400 meters away from the controller via 4-wire twisted pair
- Ability to provide complete water quality control for two cooling towers or up to four (4) boilers at the same time
- On-board help screens with wiring, programming and maintenance instructions
- Left or right exit plumbing assemblies available
Specifications
- Type: NexSys Dual Control System
- Conductivity Sensor: Optional conductivity sensor
- pH Sensor: Optional pH sensor
- ORP Sensor: Optional ORP sensor
- Make-up Conductivity: Optional make-up conductivity sensor
- Output Relays: Optional relays
- Flow Switch: Optional flow switch
- Water Meter: Optional water meter
- Analog Input: Optional 4-20 mA input
- Output Signal: Optional 4-20 mA output signal
- Remote Display: No remote display
- Mounting plate: Optional mounting plate
- Conductivity Range: 0 – 5,000 μS
- Maximum Pressure: 140 psi (9.65 bar) @ 100 °F
- Process Temperature: Max 140°F (60°C)
- Ambient Temperature: -4° to 158°F (-20° to 70°C)
- Conductivity Resolution: 10 μS
- Conductivity Accuracy: ± 40 μS
- pH Range: 2-12 pH
- pH Accuracy: ± 0.05 pH
- pH Resolution: 0.01 pH
- ORP Range: -1000 to +1000 mV
- ORP Accuracy: ± 5.0 mV
- ORP Resolution: 1 mV
- Accuracy & Repeatability: ± 1.0% of scale
- Deadband/Setpoint: User programmable
- Enclosure: NEMA 4X, ETL
- Timer: Relay run time exceeded
- Power: 120/240 VAC 50/60 Hz
- Relay Ratings: 120VAC 3A each, 15A total
Downloads
CutSheet: NexSys Cooling Tower Controller
Quick Start Guide: NexSys Cooling Tower Controller
Product Manual: NexSys Cooling Tower Controller
