Emerson MINI-MATE2 7.3Load Control Features, 7.2.3Humidification Operation, 7.3.1Communications

System Performance Microprocessor Controls

7.2.3Humidification Operation

The canister humidifier is activated when the humidity control calculates a requirement of 100% humidification; and is deactivated when the humidification requirement falls below 50%.

7.3Load Control Features

The control system monitors the compressor and prevents it from turning on within a 3 minute period of being off. If this on-off-on cycle occurs too often (e.g., 10 times in one hour) a Short Cycle Alarm will occur.

7.3.1Communications

The control system uses a two-wire, RS-422 channel to communicate with Liebert Site Products via a proprietary protocol. A converter board (ECA2) is available to allow communications with a “dumb” terminal or a computer using RS-232 channel. More details are provided in the Site Products and ECA2 User Manual.

The communications channel provides both monitoring and control options, including:

•TEMPERATURE/HUMIDITY: Current temperature and humidity readings.

•STATUS (%), Cooling/heating and humidify/dehumidify operating status.

•PRESENT ALARMS: Alarms currently activated.

•SET POINTS:

•Temperature Set point

•Temperature Sensitivity

•Humidity Set point

•Humidity Sensitivity

•High Temperature Alarm

•Low Temperature Alarm

•High Humidity Alarm

•Low Humidity Alarm

•ON/OFF STATUS and CONTROL

•SILENCE ALARM

51 Liebert® Mini-Mate2™