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microFLEX M2T Controller

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Single Cooling Tower/Closed Loop Controller

The ProMinent® microFLEX is a cooling tower/closed loop controller that combines the latest technology with an economical solution. Our breakthough design offers a worry-free thermal flow switch that does not require any user adjustments or calibration.

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Standard Features

Tower conductivity and temperature input
Flow switch status input
5 Key universal keypad
2 Line, 16 character backlit display
Single water meter input

Benefits

Selectable Inhibitor Feed: Provides 4 feed modes; bleed and feed, bleed then feed, proportional to makeup water volume and percentage time.
Water Meter Input: Allows for chemical to be fed based on water volume versus timed pump control methods generally found on comparably priced controllers.
Single Point Calibration: For ease of start up and operation. Warning message immediately detects fouled or faulty sensors.
What and Why Information: On the controller display is a valuable troubleshooting tool. Solenoid and chemical pump relays show complete status. Shows WHY the relay is on/off.
Controller Run Time: Gives total hours per day and total operating days since initial installation.
Robust Diagnostics: Provide complete 24-hour history of bleed valve operation, relay run times and minimum/maximum temperatures.
Keypad Password: Eliminates unauthorized adjustments.
Communication Options: Include Ethernet networking, dry contact alarm relay or 4-20mA output on conductivity.
Optional Web Browser User Interface with Networking Capabilities: Provides ability to direct connect to the controller from a portable workstation, such as a laptop computer. Can also view critical processes remotely through the use of a LAN.

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	Rating - Detail	Notes
Analog-Digital I/O
Conductivity Sensor	Auto ranging from 100uS to 10,000uS compensated	Single point calibration, temperature
Temperature Sensor	32oF to 125oF (0oC to 50oC)	Displayed as F or C
Thermal Flow Switch	1GPM trip within 30 seconds NO FLOW	Typically 10 second trip with in FLOW/
Water Meter Input current	400Hz, 0.5mA @ 5VDC measurement head	Accepts paddlewheel or contacting
Relay Outputs	1 SPST (Inhibitor), 1 SPDT (Bleed)	Single controller fuse
4-20mA Output (optional)	Single DC isolated, loop powered loop	User definable span, alarms on open
Alarm Relay (optional) un-fused	500mA @ 24VDC Dry contact set, alarm	Normally closed contact, open on
Communications User Interface
Keypad-LCD	5 Key tactile feedback, universal characters, 2 line x 16 character, backlit	Scan rate 100 mS nominal, User adjustale contrast
10 Base T, TCP/IP Ethernet LAN(optional)	HTML micro web server with user definable IP address	User definable static IP Remote Monitoring & Programming
Controls
Relay ON/OFF	ON/OFF control valve	Relay 1 chemical feed, Relay 2 bleed
Volumetric feed	User set, measure volume & pump on time	Sequential control, measures make-up volume then bleeds for user set volume
Interlocking	Flow switch contact set input	Relays OFF when contact set opens
Blocking	Inhibitor feed may be set to block on bleed
Alarms - Feed Limit Timers	Minutes per day	Auto-reset @ Midnight
System
Units of Measurement	US/Metric selectable	Option to use US or Metric units of measurement
Electrical	120VAC, 50/60Hz
Internal Fusing	5 AMPS @ 120VAC
Surge Suppression	Relay 2 N.O. (bleed) contacts snubbed @ 0.1uF, 150ohm	Varistor on AC line input
Accessory Power	15-22VDC, unregulated, thermally fused @ 50mA
Enclosure	Non-metallic, NEMA 4X	5.9”W x 5.9”H x 3.5”D (150mm W x 150mm H x 90mm D)
Certifications
CSA: Pending		CSA tested to comply with UL (Pending)

Accessories

Download Zip File With Controller Accessory Documents | Part #: xxxxxx | Updated: 4/2/14

Application Notes

Boiler & Cooling Tower Instructional Videos

Video: Cooling Tower & Boiler Controllers II: Communication Options (WEBINAR) | Part #: xxxxxx | Updated: 1/24/14
Video: Inputs/Outputs & Hardware For Boiler & Cooling Tower Controllers (WEBINAR) | Part #: xxxxxx | Updated: 11/8/13

Brochures

Cut Sheet: MicroFLEX Single Cooling Tower | Part #: 7750305 | Updated: 8/17/21

Download

Trackster | Part #: Version 3.2.5385 | Updated: 10/22/14

Installation And Wiring

Cradlepoint CTR500 Setup | Part #: xxxxxx | Updated: 7/19/13

Sensor Instructional Videos

Video: Changing Electrolyte In Sensors | Part #: xxxxxx | Updated: 7/28/21

Sensor Specifications

MicroFlex Cooling Tower | Part #: xxxxxx | Updated: 4/2/14

Technical Manual