So should I fit a nest thermostat myself?
I don’t have a nest but I did fit the wireless thermo and it’s just sticking in the correct wires…I’m doing this from memory but the key is having your boiler manual (downloaded from internet)
You want your boiler manual as these are either a small DC switched or mains and some boilers have both.… The Hive I’d guess wants the
low voltage DC one so you’d likely fry it connected to the wrong one…
A decent modern boiler probably only has low voltage…. I have a reasonably modern boiler but its crap!
However, your existing Wireless is almost certainly low voltage DC (but worth checking) so it should be a straight swap. If it plugs in on the boiler side of the wireless then even more likely its low voltage DC….Posted 10 months ago
Current thermostat is a rt500f
Wireless Programmable Room Thermostat – 868MHz
Radio frequency digital programmable room thermostat with large backlit LCD display.
Thermostat: 2x AA Batteries
Receiver: 230Vac 50Hz
Rating Max: 16 (5) A SPST
Output: 0 – 230V
Scale: 5 – 35°C
Size RT500: W-130 H-95 D-40
Size Receiver: W-130 H-95 D-65
L – Live
N – Neutral
COM – Live in
NO – Switched output
Volt free contactsPosted 10 months ago
5/2 or 7 day programming flexibility
60 metre transmitter range
Frequency 868 MHzstevextcMember
So looks like the receiver runs of mains.
Yes but if that is supplied via a plug then the switching will still be low voltage DC.
I think its really only older stuff (pre-wireless) where they use mains voltage to run a thermostat or external timer direct from the boiler mains power…
There will be a wiring diagram for your boiler and this indicates if it is mains/low voltage DC or both…. and which pins the wires are connected to,
From memory mine has both but like I say it’s a crap boiler not a Vaillant!Posted 10 months ago
£79 to get someone in.
Already have a wireless salus thermostat on a valiant combi Haven’t opened it up yet but from what I can tell it will be 3 wires.
If I read the nest manual right it should be a matter of rewiring those 3 wires into the appropriate terminal on the heatlink
Consequences of failure would be a highly irate pregnant wife.
Worth having a go? Anyone wired one up themselves?Posted 10 months agolustydMember
When I fitted my Hive it was the same back plate and the same pins – they are industry standard for the most part. Remove old receiver, install new one, job done.Posted 10 months ago
They will have a wiring diagram, just turn off the mains to the boiler before you start, two screws at the bottom of the receiver and it lists off. No need to open up the boiler as the old receiver probably says what the pins are on the back 🙂
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