Discuss Vokera and Nest opentherm. in the Central Heating Forum area at PlumbersForums.net

Messages
43
Hi All

Just to ask. I’ve a Vokera Unica, i36 (ERP), great boiler by the way. I have an external sensor. Apparently, I can wire up the nest (3rd gen) and use that as an opentherm stat. At the moment I’m assuming it’s an on off stat. I have been advised that I just wire the stat in the heatlink to the connection and the and those connections to the pink wires in the terminal block. I’m slightly confused as the pink wires already are connected to make a circuit? the orange wires are for the external sensor. As for the heatlink it looks a bit like spaghetti junction. As for my competence I’m not stupid, I was once a plumber many years ago but decided to re-train to become a good old NHS nurse instead (don’t ask me why, it’s a regret I will live till my dying day!). I hang all my own radiators, plumb my own bath in and I never call a plumber. Apart from having to pay someone £500 to gas up and wire the nest to the Vokera as I did most of it myself. It’s odd that intensive care and all the machines doesn’t even raise an eyebrow but that heatlink, stat and boiler wiring freaks me out!! Just asking, no abuse please about competence. Just asking. I’d hate to pay someone £100 to switch two wires around because I can’t see the wood for the trees. Anyway, I’ve put a few images up. Hope someone can help and stay safe and look after your health both physical and mental (my area of expertise is men’s health and public health).
Dave

IMG_20201126_191341.jpg
IMG_20201111_141256.jpg
IMG_20201111_141054.jpg
IMG_20201126_191335.jpg
 

Attachments

  • IMG_20201111_141054.jpg
    IMG_20201111_141054.jpg
    39.5 KB · Views: 5
  • IMG_20201111_141256.jpg
    IMG_20201111_141256.jpg
    53.6 KB · Views: 7
  • IMG_20201118_123901.jpg
    IMG_20201118_123901.jpg
    66.7 KB · Views: 7
  • IMG_20201126_191335.jpg
    IMG_20201126_191335.jpg
    100.9 KB · Views: 6
I also have an i36 and just connected up the open therme to my Google nest. It's great. So you power the sensor independently, then remove 2 pink wires that don't run to circut baord. You then run 2 new wires instead out to the OT 1 and OT 2 on the nest sensor. That's all. Then on the nest select connection type to opentherme instead of on off. It will tell you pretty fast on the nest stat if it can not detect the opentherme connection. Hope this helps.
Tim
 

Reply to Vokera and Nest opentherm. in the Central Heating Forum area at PlumbersForums.net

Similar plumbing topics

Hi all, I have just bought a google nest 3rd gen thermostat to be connected opentherm. I currently have the baxi ifos rather comp fitted. I was...
Replies
1
Views
572
    • Like
Hi everyone, Just wanted to share my experience with "upgrading" an S plan setup to Opentherm and Vaillant Control Center (VR66). There are a few...
Replies
1
Views
1K
I've got a Baxi 600 combi, with a Google Nest thermostat, fitted a year ago. I've just learnt about OpenTherm, so went into my Nest settings, and...
Replies
3
Views
1K
My boiler is currently powered by a switched fused spur. The spur is located 40cm underneath the boiler. I haven't checked but it is probably a 3A...
Replies
2
Views
996
I have a home with an oil boiler in a garage turned into a flat, heating both flat and main house, running c plan with two pumps, two motorised...
Replies
0
Views
422
Back
Top