User guide

Revision 2.2 Page 3 of 17
Warning
Please Note
The specifications of the product detailed on this
Set-Up Guide may change without notice. RDM
Ltd. shall not be liable for errors or for incidental
or consequential damages, directly and indirectly,
in connection with the furnishing, performance or
misuse of this product or document.
Ensure that all power is
switched off before
installing or maintaining
this product
ML Twin Controller Installation Guide
www.resourcedm.com
Introduction
The ML Twin Compressor Controller is a dual stage thermostat with adjustable parameters, incorporating a defrost scheduling timer,
lights control, fan control, trim heater control (with energy saving feature by pulsing trim heater) and an alarm handler. The controller can
be networked back to an RDM Data Manager, see Network Configuration
The main features are: -
Display with decimal or whole numbers
Dual stage thermostat using on/off relays
Probe 1: Air On Probe
Probe 2: Air Off Probe
Probe 3: Logging Probe or Defrost Probe or Plant Fault
Probe 4: Logging Probe or Defrost Probe or Plant Fault
Programmable parameters
Defrost scheduler (up to 8/day)
Manual defrost (from the display buttons)
Network Defrost schedule option
Fan control relay
High volume Alarm buzzer Installation (Can be switched off)
RS232 output for IP Network connection
Automatic compressor duty rotation
Network Lights timer function
Trim Heater control relay
Remote Trim Heater control
Remote network commands
PT1000, NTC2K, NTC2K25 or 10K probes supported
Case Off or Secondary Setpoint Offset option (linked to the lights schedule).
Degrees C and Degrees F incorporated in one controller
Display
LED’s: -
Cooling
Fans
Lights
Network
Off No network attached
Flashing Attempting to Log on to network
Steady On-line
Defrost
Service
HACCP
Alarm
Enter Up Down Defrost
Note: Function keys illuminate when pressed, illumination is turned off 20 seconds
after the key is used. Press and hold the defrost button to force a manual defrost
Keys