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en:puus_setup

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puu's MitsuRunner setup

Notable changes to the original SW and HW:

  • Two additional Dallas sensors in heat exchanger pipes (used for research and as spare parts)
  • Current clamp sensor monitoring input power of the heat pump
  • Variable temperature delta threshold to start defrosting:
    • if (input) power < 500W, threshold = 4
    • if 900W ⇐ power < 1000W, threshold = 5
    • if power >= 1000W, threshold = 6




MitsuRunner wiring

Defrost thermistor's wires inside the outdoor unit



Defrost hack wires installed



MitsuRunner's AC wires and current measurement clamp




Sensors

Outdoor heat exchanger sensor (vertically installed) and two additional sensors (diagonally installed) just in case



Middle DS18B20 is used for MitsuRunner, blue arrow points to the location of the original defrost thermistor



Outdoor temperature sensor




Enclosure




Other hacks

Defrost thermistor insulated



Holes drilled to avoid ice accumulating

en/puus_setup.1675326294.txt.gz · Last modified: 2023/02/02 10:24 by 109.204.204.138

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