The Evaporator Controller is a microprocessor-based control system designed for efficient automatic control and monitoring of all evaporator zone functions.

The system is responsible for temperature control, scheduling and evaporator zone defrost. The system will automaticly  monitor zone temperatures and control each zone independently to maintain  setpoints based on an operator defined schedule.
Setpoints, evaporator operating modes, fan cycling method, scheduling of temperature setpoints, and defrost parameters can be changed by the operators to match the individual needs of the facility.

The Evaporator Controller can control different types of evaporators together as a system with multiple defrost types and valve stations.   The system also provides for a defrost queue so the number of zones defrosting at one time can be limited.

A PC software option is available for remote monitoring of real-time data from the Evaporator Controller.
The PC can be connected through an RS-422 communications network for access to data, logs, reports and setpoints.  Remote, off-site, access to the controller is available  through a phone line when used with the modem option or an IP address with the Ethernet option.

The PC software provides for automatic downloading of all system data.  This data can be used to generate graph plots and reports for detailed information on historical system performance.

The controller is a UL and cUL listed industrial control panel built to UL508A specifications.  

Downloads

M&M Refrigeration - Evaporator Control Panel (Literature)

M&M Refrigeration - Evaporator Control Panel (Manual)

 Screen Images

Evaporator Control Panel Screen Images

  Control Features:

• Support for all Valve Configurations and Defrost Methods
• Real-Time, Easy-To-Read Display
• Customizable User Defined Zone Names
• Status & Diagnostic Screens on Evaporator Conditions
• Customizable Ten (10) Level Password Security System
• Comprehensive Alarm Reporting and Data Logging Function
• Ability to Share Temperature Sensor with Different Zones
• Extensive Set of Energy Management Features
• User Programmable Defrost Queue Limits
• Staging Control for Power Failure Recovery of Zones
• Temperature Scheduling: 3 Schedules with 8 Event Times Each
• Fan Cycling Options (Always On, Temperature, Anti-Stagnation)
• Defrost Options: None, LFR, Scheduled or Demand
• Support For Defrost Termination Input
• Support for Liquid and Hot Gas King Valve Control
• Manual Override Of Schedule Number And Setpoint Group
• Support For Linking Multiple Controllers Together
• Common Scalable Hardware and Software Platform

Specifications

   Microprocessor Board

• 16 Channels of Analog Input (12-Bit, 4/20 mA, 0-5V)
• 32 Channels of Discrete I/O (Expandable)
• Two RS-422/RS-485 Communications Ports
• Watchdog Timer and Self Test Functions
• Battery Backed Memory and Power Monitoring Circuits

  Display Adapter Board

•  Supports Multiple Font Sizes Including Reverse Video
•  Keypad Support and Digital Contrast Control

  Electrical

•  120/240 VAC, 50/60 Hz, Single Phase Power Supply
• Maximum FLA: 30 Amps
• Internal Breakers: 1, 5 and 15 Amps

  Modem/Communications Board

•  COM 2: RS-232/Modem
•  COM 3: RS-232/RS-422/RS-485
•  Protocols: PC Interface
• Options: 56K Modem / Ethernet Board

  I/O Board

• 32 Channel Design with Optically Isolated Modules
• Standard Layout: 27 Outputs and 5 Inputs 
• Nominal Voltage: 120/240 VAC
• Max: 140/280 VAC/VDC
• Min Voltage: 90/180 VAC/VDC
• Max Load: 1.5A 120VAC (running),  30A 120VAC (inrush)

  Construction

• Enclosure: 60” H x 36” W x 8” D  -  NEMA 4 , UL Type 1
• Keypad: Full Numerical with Dedicated Special Function Keys
• Display: Graphical Backlit LCD, 10” Diagonal Size
• Operating Temperature:  -0º: +50ºC
• Storage Temperature:  -10º: +85ºC
• UL File Listing: NITW.E136526
• cUL File Listing: NITW7.E136526