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 Post subject: Help installing Hive
PostPosted: Fri Nov 10, 2017 6:03 am 
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Hi

I've purchased a Hive and could do with some help with installation please.

I have a Worcester Greenstar Camray Utility 25/32 Boiler and a Potterton EP3000 thermostat.

The wires in my current set-up are:
All the blues are neutral including the link from N-N
Only blue is the one that marked goes to terminal 5
2 marked browns go to live, also link from live to 5
one remaining brown goes to 3
2 marked reds go to 3 also with remaining red going to 2

Any help gratefully received.

Thanks


Attachments:
File comment: current thermostat
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File comment: back of hive box
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File comment: cover for current box
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File comment: current wiring set up
20171110_052515a.jpg
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 Post subject: Re: Help installing Hive
PostPosted: Wed Nov 15, 2017 12:07 pm 
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Boilers incompatible with Hive Active Heating

There are some Worcester Intelligent Appliance boilers that aren’t compatible with external heating controls apart from Worcester’s TR2 room thermostat. Hive can’t be installed with these boilers:

GC Number Boiler Model
4710810 Worcester Bosch ICC2 - ZWBR 11-37A
4710811 Worcester Bosch *C*RD 537i
4710812 Worcester Bosch *C*RD 542i
4731156 Worcester Bosch Greenstar HE Plus - ZWBR 7-28A
4731157 Worcester Bosch Greenstar HE Plus - ZWBR 11-35A
4731175 Worcester Bosch *C* Greenstar 30 HE Plus Combi
4731176 Worcester Bosch *C* Greenstar 35 HE Plus L Combi
4731179 Worcester Bosch *C* Greenstar R 30HE Plus
4731180 Worcester Bosch *C* Greenstar R 35HE Plus
4731181 Worcester Bosch *C* Greenstar R 40HE Plus

I don't know why they are not compatible I can only guess. My guess is the thermostat connects to the buss and turns the flame height up and down not simple off/on. But that is only a guess.

There is a system called opentherm which I know Nest uses which is an attempt standardise the system, but it seems Bosch Worcester use their own system called FX intelligent controls.

However as far as I am aware the thermostatic radiator valve (TRV) is reasonably universal, the idea is each valve gradually closes as the room heats up which causes the return water to increase in temperature which in turn tells the boiler to reduce flame height, so thermostats like the EvoHome still work, and what this does is read the info from each TRV and when boiler is no longer required turns it off, but until that point allows the electronic TRV heads to control each room.

I am an electrician not a plumber so not really my field, in my mothers house I intended to do it bit by bit, I fitted the Energenie TRV electronic heads and was going to add Nest latter, however once the heads were fitted I found the house was well controlled so never bothered fitting Nest. I think I made a mistake and I could have use the Pegler i30 and saved a lot of money, I don't need the internet option to adjust heat.

I was disappointed with speed of change, I wanted the house warm by 8 am so set the heads to start warming up at 6 am however found it was more like 10 am before the day time temperature was reached, so I have cheated and instead of asking for 20 degs I ask for 24 degs then drop it back down again at 8 am this works.


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 Post subject: Re: Help installing Hive
PostPosted: Wed Nov 15, 2017 3:16 pm 
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As a PS I note Hive when used with two channels does not have volt free contacts, that may be why it states will not work with some Bosch?


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