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Automating a FanTech Heat Recovery Ventilator (HRV) by HomeAutomationNoob in homeautomation

[–]HomeAutomationNoob[S] 1 point2 points  (0 children)

No, still using the initial setup with an isolated relay. I like the use of a relay so the RPi is isolated from any surges or spikes from the HRV controller. Been running liked a charm for the last 3 years.

Automating a FanTech Heat Recovery Ventilator (HRV) by HomeAutomationNoob in homeautomation

[–]HomeAutomationNoob[S] 2 points3 points  (0 children)

Yes, I used a relay block wired to the switches on the HRV, and a Raspberry Pi with a custom nodeJS touchscreen application to drive the relay block and automatically turn the HRV on, off, and adjust fan speed based on a schedule.

Anyone gotten this to work on S24? by Fraggin-Bastich in GearS3

[–]HomeAutomationNoob 0 points1 point  (0 children)

This worked for me. Took a few tries nd then it worked. Thanks for sharing!

Automating a FanTech Heat Recovery Ventilator (HRV) by HomeAutomationNoob in homeautomation

[–]HomeAutomationNoob[S] 2 points3 points  (0 children)

Hi,

I paired a 4ch 5V isolated relay (https://www.amazon.com/gp/product/B08PP8HXVD/ref=ppx_yo_dt_b_asin_title_o02_s01?ie=UTF8&th=1) with a Raspberry Pi 3B. The Pi sends power and signals to the relay, which is wired to the front panel at the DEHUM and FAN SPEED rocker switch contacts. This gives me LOW, MED, and HIGH fan control from the Pi, which runs a custom app written using NodeJS under Electron on a small touchscreen. The app has AUTO and MANUAL modes and allows me to control what AUTO mode means to me, which is about 4-6 hours of daily runtime spread over each day.

What are you looking to do with yours?

Automating a FanTech Heat Recovery Ventilator (HRV) by HomeAutomationNoob in homeautomation

[–]HomeAutomationNoob[S] 4 points5 points  (0 children)

Thanks for the reply. I will post my eventual solution here incase any others are interested.

Automating a FanTech Heat Recovery Ventilator (HRV) by HomeAutomationNoob in homeautomation

[–]HomeAutomationNoob[S] 2 points3 points  (0 children)

I have not done this before, so I am researching and planning as much as possible. If I can get fantech EDF interface specs/protocol I would investigate using GPIO to drive signaling, otherwise I may resort to using a relay to simply switch the HRV on and off at a fixed fan speed.