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@ -271,7 +271,7 @@ Are you still reading? If yes, your are interested in and this appendix is for y
About sensors: do not use cheap "waterproof epoxy-covered" sensors. "Waterproof" lasts for a short time.<br> About sensors: do not use cheap "waterproof epoxy-covered" sensors. "Waterproof" lasts for a short time.<br>
Buy DS18B20s chips. Cheap or not cheap doesn't matter - I've never seen "bad" DSes. Solder sensors to the wires and cover the sensors with a two layers of 2-component epoxy resin as pictured below.<br> Buy DS18B20s chips. Cheap or not cheap doesn't matter - I've never seen "bad" DSes. Solder sensors to the wires and cover the sensors with a two layers of 2-component epoxy resin as pictured below.<br>
<img src="./m_ds18b20_epoxy.jpg" width="500"><br><br> <img src="./m_ds18b20_epoxy.jpg" width="500"><br><br>
For sensors at compressor and discharge (+100°C and higher) add heat resistant sleeves for each wire.<br> For sensors at compressor and discharge (+100°C and higher) use heat resistant sleeves at every wire.<br>
<img src="./m_ds18b20_wires_protection.jpg" width="500"><br><br> <img src="./m_ds18b20_wires_protection.jpg" width="500"><br><br>
To get precise temperature readings sensors must be insulated from ambient air temperature influence with additional thermal insulation. Temperature readings from most of sensors are interesting, but +/- few degree does not matter. So most of sensors can be covered with insulation as you wish. But 2 sensors "Before evaporator" and "After evaporator" are critical to EEV and needs extra attention. Temperature of this sensors must be as close to the temperature of copper tube as it possible. So install Tae and Tbe sensors as pictured below. You can use thermal paste, but there is no significant difference with much more available silicone.<br> To get precise temperature readings sensors must be insulated from ambient air temperature influence with additional thermal insulation. Temperature readings from most of sensors are interesting, but +/- few degree does not matter. So most of sensors can be covered with insulation as you wish. But 2 sensors "Before evaporator" and "After evaporator" are critical to EEV and needs extra attention. Temperature of this sensors must be as close to the temperature of copper tube as it possible. So install Tae and Tbe sensors as pictured below. You can use thermal paste, but there is no significant difference with much more available silicone.<br>
<img src="./m_ds18b20_evaporator_mount.jpg" height="700"><br><br> <img src="./m_ds18b20_evaporator_mount.jpg" height="700"><br><br>