Thermia Genesis

Thermia Genesis is the platform used by several heat-pump models produced by Thermia. I have a Thermia Calibra Cool 7 on which I have tested all of this.

Official website:

• https://thermia.com/products/ground-source-heat-pumps/thermia-calibra/

Used versions of the specification can be found here.

Official Modbus mappings:

• I have 3 versions of the Thermia Genesis modbus schema definitions.

  • Platform versions 10, 12 and 13

• There were some fields added and removed between those versions.

  • I have chosen to include all of them.

• There are many fields that only work

  • on specific heat pump models
  • if specific modules have been installed (you’ll see for example (EM) or (EM3 only) in the description of a Field).
  • if specific functionality is used (like swimming pool)

• Status: All registers and discretes in the documentation have been put into the schema definition.

• Schema as YAML: ThermiaGenesis101213.yaml

I have also created for version 13 a schema where all Fields have been put into blocks based on the area of use (the “Reference to” column in the original PDFs)

• Schema as YAML: ThermiaGenesis13.yaml

The schema is also available as pre generated Kotlin code.

<dependency>
  <groupId>nl.basjes.modbus.devices</groupId>
  <artifactId>modbus-device-thermia-genesis</artifactId>
  <version>0.6.2</version>
</dependency>

With that the code to use the values can be as simple as this Kotlin Script:

This script produced this output:

Outdoor Temperature            : 22.83 °C
Room Temperature               : 22.5 °C
Comfort Wheel Setting          : 20.5 °C
Tap Water Weighted Temperature : 53.2 °C

Repo location of this Schema: https://github.com/nielsbasjes/modbus-devices/tree/main/modbus-device-thermia-genesis