navitron
 
Renewable Energy and Sustainability Forum
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Anyone wishing to register as a new member on the forum is strongly recommended to use a "proper" email address - following recent spam/hack attempts on the forum, all security is set to "high", and "disposable" email addresses like Gmail, Yahoo and Hotmail tend to be viewed with suspicion, and the application rejected if there is any doubt whatsoever
 
Recent Articles: Navitron Partners With Solax to Help Create A More Sustainable Future | Navitron Calls for Increased Carbon Footprint Reduction In Light of Earth Overshoot Day | A plea from The David School - Issue 18
   Home   Help Search Login Register  
Pages: 1 [2]   Go Down
  Print  
Author Topic: Any TRVs that can call the pump?  (Read 1240 times)
Tigger
Hero Member
*****
Offline Offline

Posts: 536


« Reply #15 on: January 23, 2019, 01:23:12 PM »

Hi Dave,

The bit of information I could find referred to a wax capsule that expands when warmed.  My plan is just to buy one so I don't risk a big chunk of money on it......
Logged

30 tubes, south facing gable wall (Navitron Fornax Trial System).  Hunter Herald 8, integrated boiler hooked up with Oil Boiler via H2 control panel.  Scrounging fire wood wherever possible Smiley
daveluck_uk
Jr. Member
**
Offline Offline

Posts: 92


« Reply #16 on: January 23, 2019, 01:39:51 PM »

Excellent! Can you let us know how you get on? I simply can't justify spending the better part of 1k to turn on and turn off a pump!
Logged
Tigger
Hero Member
*****
Offline Offline

Posts: 536


« Reply #17 on: January 23, 2019, 02:06:43 PM »

>> I simply can't justify spending the better part of 1k to turn on and turn off a pump!

My thoughts entirely, I'm they're selling this kit for what they can get rather than just a decent margin on what it costs to make it and there's certainly no view to saving money in the real world......
Logged

30 tubes, south facing gable wall (Navitron Fornax Trial System).  Hunter Herald 8, integrated boiler hooked up with Oil Boiler via H2 control panel.  Scrounging fire wood wherever possible Smiley
daveluck_uk
Jr. Member
**
Offline Offline

Posts: 92


« Reply #18 on: January 23, 2019, 06:02:21 PM »

OK....so this is way, way above me for now but...

https://github.com/Heckie75/eQ-3-radiator-thermostat

This is a link to the code required for a Raspberry Pi to control an Equiva 3 bluetooth TRV head

https://www.amazon.co.uk/eQ-3-Eqiva-BLUETOOTH%C2%AE-Smart-Heizk%C3%B6rperthermostat-White/dp/B01N39V0I4/ref=sr_1_5?s=diy&ie=UTF8&qid=1548266871&sr=8-5&keywords=equiva+eq3

Is the afore mentioned head.

We need now is a wireless relay or wired relay controlled by the Pi and some clever coding to turn on the pump and turn it off again.

Seeing as you can see the temp and know what the cut off temp is some code that says if room heat is required turn on pump if not turn off.

Possibly with nothing hard wired and should be able to use exisiting plumbing and I reckon for a lot, lot less than the commercially available systems mentioned.

All we need now is some one to do the coding....any takers?






« Last Edit: January 23, 2019, 06:04:59 PM by daveluck_uk » Logged
Pages: 1 [2]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
SMFAds for Free Forums
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!