Thermostat input - why servo?

[bholota]

@deepsyx Why you used servo instead thermostat input? Most cheap central heating system has those or there is other reason to use servo maybe?

[tibo]

@deepsyx Also curious about how you did this. I've got a really simple heating system in my appartement and I want to add a way to schedule the eating system on top of this kind of button. could you add more pictures on how you manage to setup the servo and which kind of servo you used? Thx!

[piranna]

In the description he says it's about not willing to disassemble the thermostat, so he's using the servo to move the temperature dial himself.

[bholota]

@piranna but there is no need to disassemble anything, there should be external thermostat input available in his heating system. In 99% cases it's simple two pins when connected - heating system is on and opposite for open circuit.

[FlorianWendelborn]

@bholota Can you provide an example of those? Never seen that and I'm wondering if mine has them.

[bholota]

@dodekeract If I remember correctly I've installed baxi mainfour 240f, you can find official manual online, example: official_link.pdf it's low-end heather for Polish standards - you can connect simple external thermostat (I'm using something like that currently, but soon I will replace it with rbpi)

[krzyk]

@bholota Actually in Vaillant you have to take off the metal enclosure of the heater, and then you have access to the the thermostat pins (3-4, 7-8-9 and BUS). But yeah, the one that installed the system should have connected a room thermostat somewhere. Maybe it is also sealed, so he can't take it of the wall?

[deepsyx]

Hello! Unfortunately I do not wanna remove the metal cover, because of warranty reasons. I researched easier ways to accomplish this, but unfortunately the servo was the simplest and cheapest method I found :)

[krzyk]

@deepsyx How did you attach it? I was wondering on using a servo, but I couldn't find good online resources how to fit it to the handles appropriately.