Hive heating

[Anthony Harrison]

Hi I've tried to fit my new hive system at the weekend. Hot water is fine. But no heating. I disconnected the two wires in my existing thermostat and capped them off. They were in ports 1&2 the one in no 1 was red and no2 was black do these two wires need to be joined together. I've also got a separate frost state fitted next to my boiler which is on a y plan system. Do I need to do anything with the frost state thanks

 

[stem]

I don't understand the description of the wiring that you have given. What do the numbers 1 & 2 refer to? If it's the old room stat what make / model is it? Many thermostats have numbers on their terminals, but their functions differ from manufacture to manufacturer and model to model.

Anyway, the old thermostat can't simply be disconnected as this would leave the heating wiring 'open circuit' and as you have discovered it will not operate, the integrity of the circuit needs to be maintained. As not all thermostats are the same, or indeed wired the same, the specific instructions given to one poster may not apply to another. So, whilst the steps are the same, some working out will be required in each case.

1. Look at the wiring diagram for your make/mode of thermostat that you are removing. If you don't have the instructions for it, a diagram is usually printed inside the lid. This will show which are the two switching wires, and which is the neutral wire. (If there is a neutral present. Not all thermostats need or have one fitted)

2. Trace the thermostat cable back to its origin.

3. Take take a photo, or make a note of where the two live switching wires are connected at their origin.

4. Disconnect all of the wires going to the old thermostat and remove the cable and thermostat. All other wires to remain in place.

5. Insert a wire link between the terminals where the two switching wires have just been removed from, so that they are now electrically joined together.

Normally a frost stat is wired externally to the other controls so that it will override them. In which case, no modification to it is required.

Edit.
For your future information, you have posted this question in the wrong forum. This forum is for Information and notices about the forums and DIYnot.com in general. Your question would have been better in Plumbing & Central Heating where those in the know will hangout. Don't start a new thread now though, it will cause confusion and the mods will probably move it for you when they spot it anyway. This forum is for Information and notices about the forums and DIYnot.com in general.

 

[Anthony Harrison]

Hi I've tried to fit my new hive system at the weekend. Hot water is fine. But no heating. I disconnected the two wires in my existing thermostat and capped them off. They were in ports 1&2 the one in no 1 was red and no2 was black do these two wires need to be joined together. I've also got a separate frost state fitted next to my boiler which is on a y plan system. Do I need to do anything with the frost state thanks

 

[Anthony Harrison]

Without sounding daft if I just join the two wires together at the old thermostat is that the same. There are only two wires on the old thermostat. Not sure how I'd trace the wires ba m to there origin I'd imagine they go back to where my boiler is situated??? Thanks

 

[Anthony Harrison]

Hi without sounding daft if I just join the two wires together at the thermostat there's only the two there would that be the same. Not sure how I'd trace them back to there origin I'd imagine they go back to the boiler??

 

[stem]

If there were only two wires to the old stat, then they will be 'live' and 'switched live'

They are disconnected from their ORIGIN and a link inserted in their place to complete the circuit. The old stat can't just be removed otherwise the wiring will be left open circuit and the heating won't work.

Where they originate from will depend upon the personal preferences of the original installer. However, if your system has motorised valves then the thermostat will be connected to them and not the boiler, likely it will go via a wiring centre.

If you can't trace the cable back, you can leave the thermostat in place and put the two wires in the same terminal, so that they are permanently connected. Electrically it achieves the same thing, it closes the circuit.