| | 1 | # heatpump |
| | 2 | Retrofitted controller for an IVT greenline 14e-9. |
| | 3 | The old controller gave up the magic smoke and this is my way to fix it. |
| | 4 | |
| | 5 | The controller consists of a raspberry pi 3 with a DAQCplate for sensors and controlling relays. |
| | 6 | I am using the original NTC thermistors. The sensors are connected: one lead to +5V, the other lead to ADC input, and a 1.5kΩ between ADC input and GND. This makes a voltage divider and 1.5kΩ fits the complete sensor range for the ADC. |
| | 7 | A 5v relay is connected to the output. +5V to flyback protection and the othera lead to GND. The 5V relay run the big 3-phase relay for the compressor. |
projects / heatpump.git / blame_incremental