Replacing Honeywell R6660D with Hive

[Westie1010]

Hi all,

I have a GREENSTAR 30i ErP Combi boiler. Currently installed with a Honeywell thermostat. Looking to swap it over to a Hive heating setup. Can anyone have a quick goosey and let me know if I have the correct idea.

Existing Thermostat. 1 Cable to Spur, the other to Boiler. No earth but I believe this needs adding to the Hive from the Spur cable.

Hive Wiring, I don't have OpenTherm

New Hive Thermostat. N, L, E from the Spur cable.
Now this is the part I'm struggling with a little. My boiler connections, do I map Honeywell A to Hive 1 or 2? I believe Honeywell B goes to Terminal 3.

The Boiler

Any advice is appreaciated

 

[ericmark]

The line and neutral seem the wrong way around, need to check which is why just red rings, the other two

easy enough, not sure with Hive, this

means earth not required, but normally have a terminal to park the earth wire into.

 

[Westie1010]

I didn't even notice that...scary really. I'll be sure to check the spur first. I assume because the thermostat has been running this whole time it's most likely wired correctly just the wrong colours....

Thanks for clearing up the boiler connections, looks like it's what i expected.

 

[Westie1010]

Just checked the spur and blue does go to Neutral and brown does go to Live.....unsure why it's swapped on the Honeywell. Surely the Honeywell shouldn't be working in this case?

 

[Westie1010]

 

[CountryFan]

Just checked the spur and blue does go to Neutral and brown does go to Live.....unsure why it's swapped on the Honeywell. Surely the Honeywell shouldn't be working in this case?

Some things work on reversed polarity

 

[Westie1010]

Success, thanks all

 

[ericmark]

AC does not have a polarity as such, so as long as the power supply and the contacts are not connected it would work either way around.

 

[ericmark]

You are brave, and well done, I will only alter central heating in the summer in case a mistake is made.

Now you need to look at the TRV heads.

I started with Energenie, then eQ-3, then Kasa, and finally Wiser. Only Wiser connects to the boiler through the hub. As to if it needs to, is open for debate. So price wise, eQ-3 as a group of heads, around £15 per head, Wiser around £53, Hive £53.50 so you have to consider if worth the extra £30 to have them connect to the boiler.

It depends on your house, a TRV with *123456 is a bit useless. Far better if in °C and also able to program when on or off, or more to point up/down. My bedroom is only heated overnight, and living room during the day, so saving a load of energy, but the wife uses her bedroom at the same time as me, so if her TRV sends a demand for heat, mine only needs to open as hers has caused the boiler to fire.

I have 4 devices which can fire the boiler, three wall thermostats and one TRV head, but 10 TRV heads are programmable.

 

[Westie1010]

Yep, TRVs are next on my list! One of the reasons I was moving to Hive. I primarily work from home, and to be honest, I spent 80-90% of my time outside of sleeping in my office anyway.

The goal is to keep the rest of the house at a "minimum" temperature to prevent damp whilst having the temp in the office warm, then an hour or two before bed i can begin heating the bedroom and reducing heat in the office.

 

[ericmark]

These are the heads I am using, the Energenie can only be set using a computer or phone no option to manually set, actually a pair more like £80, since it needs a hub, not worth it for you, the Kasa also needs a hub, but far cheaper, and if anything better, as the app shows how well it has been working, but does seem to eat batteries compared with Energenie, last around 6 months, but can be set without the app or hub, and can be controlled by a remote sensor or thermostat when the radiator is against a cold wall, the eqiva eQ-3 is for the non-blue-tooth around £15 each, I got the blue-tooth version for £15 each, no need for a hub, able to set times, and does have functions like window open detection.

The Wiser like your Hive, will fire the boiler, in fact with Wiser no really need to have wall thermostats, as with Kasa you can use the wall thermostat to control the TRV.

Being fair, this is how the Energenie works, the wall thermostat can set the TRV head, but it does not allow you to work the other way around, so a bit limited.

The eqiva do not make it easy to detect a set of discharged batteries, the blue-tooth needs to be local, and only works with one phone, Wiser can as can the Energenie and Kasa the eQ-3 shows when discharged, but not how much left.