Auto operation on Breezair ES / EX / EXH, Braemar LCB and Coolair CPL coolers CPMD compatible Wall Controls (approximately 2001 to 2014)


Auto Control Function

Temperature Measurement

  • The thermostat measures the room temperature every minute to ensure accurate adjustments.

Automatic Adjustments

  • Fan Speed & Pump Operation: The system automatically adjusts the fan speed and pump operation based on the measured room temperature to maintain your desired comfort level.

Adjusting Temperature

  • Too Cool? Press the Down button to reduce the cooling effect. This lowers the fan speed. For example, if the room is at 23°C with a fan speed of 4, pressing down might lower the fan speed to 2. The system will then balance out at a higher temperature as the room warms up.
  • Too Hot? Press the Up button to increase the cooling effect. This raises the fan speed. For instance, if the room is at 24°C with a fan speed of 6, pressing up might increase the fan speed to 9. The system will then balance out at a lower temperature as the room cools down.

Continuous Operation

  • Once the room temperature is comfortable, you can leave the unit running continuously, 24 hours a day. The system will automatically adjust to maintain the set temperature.

Special Conditions

  • High Heat Load: If the room is very hot, the fan speed may increase up to 10 to try and cool the room down.
  • Low Heat Load: If the room is very cool, the fan may stop, and the pump will turn off to prevent overcooling.
  • Power Loss: If power is lost for more than 5 seconds, the system will revert to the last used setting in Auto Mode when power is restored.
  • Temperature Limits:
    • Below 15°C: The cooler won't switch on in Auto mode.
    • Above 39°C: The cooler will run at full speed until the temperature drops to a manageable level.

Restarting the Unit

  • When turned off and back on, the thermostat remembers the last setting and adjusts the fan speed accordingly. For example, if it was set to 24°C and fan speed 6, and the room temperature is 31°C on startup, the fan speed will be 10 until the temperature drops to 29.5°C, then it will reduce to 9, and so on until a balance is achieved.

This should give you a clearer understanding of how the Auto function works to maintain a comfortable temperature in your home. 





Here's a simple summary of the auto control function for the CPMD compatible thermostat (used 2001 to 2014):

  1. Temperature Check: The thermostat checks the room temperature every minute.
  2. Automatic Changes: It adjusts the fan speed and pump to keep you comfortable.
  3. Adjusting Temperature:
    • Too Cool? Press Down to lower the fan speed.
    • Too Hot? Press Up to raise the fan speed.
  4. Always On: The system can run all day and night, adjusting itself as needed.
  5. Special Cases:
    • Very Hot Room: Fan speed goes up to cool down.
    • Very Cool Room: Fan and pump may stop to avoid overcooling.
    • Power Outage: If power goes out for more than 5 seconds, it returns to the last setting when power is back.
  6. Temperature Limits:
    • Below 15°C: Cooler won't turn on.
    • Above 39°C: Cooler runs at full speed until it cools down.

When you turn it off and on, it remembers the last setting and adjusts the fan speed.


Question - Can I set a specific temperature range?


The CPMD compatible Wall Controller doesn't allow you to set a specific temperature range directly. Instead, it uses the Auto function to maintain your desired comfort level by adjusting the fan speed and pump operation based on the room temperature.

Here's how it works:

  • Set a Desired Temperature: You can adjust the fan speed using the Up and Down buttons to reach a comfortable temperature.
  • Automatic Adjustments: The system will then automatically adjust the fan speed and pump operation to maintain that temperature. If the room gets too hot or too cold, the system will increase or decrease the fan speed accordingly.

While you can't set a specific temperature range, the Auto function ensures that the room temperature stays within a comfortable range by continuously adjusting the cooling effect.

Question - How does it know when to adjust the fan speed?

The CPMD compatible Wall Controller uses a built-in thermostat to measure the room temperature every minute. Here's how it knows when to adjust the fan speed:

  1. Continuous Temperature Monitoring: The thermostat constantly checks the room temperature to ensure it stays within a comfortable range.

  2. Automatic Adjustments: Based on the measured temperature, the system automatically adjusts the fan speed and pump operation. If the room temperature is higher than desired, the system increases the fan speed to cool the room down. If the room temperature is lower than desired, the system decreases the fan speed to reduce the cooling effect.

  3. Temperature Balance: The system aims to balance the room temperature by making small adjustments. For example, if the room is too hot, the fan speed will increase until the temperature starts to drop. Conversely, if the room is too cool, the fan speed will decrease until the temperature starts to rise.

  4. User Input: You can manually adjust the fan speed using the Up and Down buttons. The system will then use this input to maintain the desired temperature by making further automatic adjustments as needed.

This continuous monitoring and adjustment process ensures that the room temperature remains comfortable without requiring constant manual intervention.