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## Refrigeration schemes supported
- Heat Pump (HP) with Electronic Expansion Valve (EEV),
- HP with capillary tube or TXV,
- EEV only controller.
<br><br>
- EEV-only controller.<br><br>
## Installations supported
- Indoor: a house or technical building with a more or less stable temperature,
- Outdoor: harsh climatic conditions taken into account and tested down to minus 32°C.
<br><br>
- Indoor: a house or technical building with an almost stable temperature,
- Outdoor: harsh climatic conditions taken into account. Outdoor HP installations tested down to a minus 32 °C.<br><br>
## Changelog and history
- 2018: PCB prototype, first real installation,
- 2018: PCB prototype, first real installation,
- 2019: 2-layer PCB, through-hole components, integrated buttons and display,
- 2019: controller redesigned taking into account development and operating experience,2-layer PCB, SMD
- 2019-2021: installations, development, tests, revisions, redisigns
- 06 Feb 2021: product is technically complete and ready for customers to use. Documentation and release stage.
- 2019: controller redesigned taking into account development and operating experience, 2-layer PCB, SMD,
- 2019-2021: installations, development, tests, revisions, redesigns,
- 06 Feb 2021: product is technically completed and ready for public access. Documentation and release stage.<br><br>
## Get your own copy and PCB assembly
- download the PCB gerber file, [Valden_HeatPumpController_Gerber](./Valden_HeatPumpController_Gerber.zip)