Deadband Mode; Settings; Operation - Procon MelcoBEMS MINI Installation Manual

4. Deadband Mode

The deadband mode is enabled by setting DIP switch 8 ON. It is only applicable to Air-To-Air type units.

4.1. Settings

There are two settings, the Heating Setpoint (default 19º) and Cooling Setpoint (default 23ºC). These values can be
changed via Modbus, refer to the Air-To-Air Modbus tables for more information.
The Cooling Setpoint must be at least 2ºC greater than the Heating Setpoint, otherwise the default values given above
will be assumed.

4.2. Operation

When enabled, the MelcoBEMS MINI (A1M) controls the Mode and Temperature Setpoint based on the Room (return
air) Temperature.
While the room temperature is less than the Heating Setpoint the unit will be set to HEAT mode with a setpoint of 28ºC.
Whilst in HEAT mode, if the room temperature rises above the Heating Setpoint + 1ºC the unit will be set to FAN mode.
Whilst in FAN mode, if the temperature rises above the Cooling Setpoint the unit will be set to COOL mode with a
setpoint of 19ºC.
Whilst in COOL mode, if the room temperature falls below the Cooling Setpoint – 1ºC the unit will be set to FAN mode.
Whilst in FAN mode, if the room temperature falls below the Heating Setpoint the unit will be set to HEAT mode with a
setpoint of 28ºC.
The following image shows this graphically (assuming a Heating Setpoint of 19ºC and a Cooling Setpoint of 23ºC):
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