Hive V1 on a Potterton Promax HE *Duplicate thread*

[bruno116]

Hi all,
I just bought a Hive V1 system from Toolstation for £60... I know bargain right
http://www.toolstation.com/shop/Hea...ntrol+&+Thermostat+Heating+&+Hot+Water/p87054


Anyways Im looking to replace my old timer / programmer (currently fitted to the wall) with the Hive reciever.
Also looking to get rid of the old Legrand 498 90 room thermostat (in the hall) and and run programming and room thermostat from the Hive controller.

I have not undertaken this yet but hopefully it would be straight forward, thinking that it will be pretty similar to the 7 day programmer that is currently on the wall.
the current 7 day timer lets me have either HW or Heating seperately

What i need your help on is the old thermostat. its an old mechanical 2 wire (+ earth) therm.

Can the two wires be connected together to make a straight live as i believe its a switched live then get rid of the legrand therm altogether?
If i do that , Is there anything i need would i need to change when the wiring to the hive receiver.

Im at work atm but can give more info & photos on the current programmer/timer when i het back.

Just trying to foresee any major hiccups i may have.

Thanks in advance for your advice

 

[stem]

The old wired thermostat needs to be 'decommissioned' to prevent it interfering with the operation of the Hive. This can be done in three ways, with No 1 being the best.

1. Find the opposite end of the thermostat cable to the thermostat, and disconnect it. Then link the terminals where the yellow and red switching wires came from together.

2. Or, remove the existing thermostat and replace it with a junction box, connecting the yellow and red wires together.

3. Or, leave the existing room thermostat in place and put the yellow and red wires in the same terminal.

There will likely be a blue wire tucked away somewhere that may, or may not be connected to a neutral. If there is and you need any more help, post back.

 

[Taylortwocities]

Your Hive will be replacing the existing programmer altogether. This will make the existing thermostat redundant as well as all of its associated wiring. You will not need to connect the red and yellow wires together as suggested by Stem.

You need to remove the thermostat wiring at the WIRING CENTRE. That is all three wires.
You'll be using the Hive thermostat once you have wired the Hive box in.

Note that you'll need to identify the White wire from the "Y-Plan diverter valve" in your diagram. this will become the heating ON connection from the Hive.

 

[stem]

He can move the existing programmer wiring to the Hive. The existing programmer wires are clearly identified from his diagram [L, N, CH on, HW on, HW off] and have corresponding terminals at the Hive, making it a simple exchange. Doing that and decommissioning the thermostat as I described is easier for a DIYer than making several changes at the wiring centre IMHO.

Anyway he knows already that the Hive will replace the programmer. But didn't ask for advice on that. His question related to removing the thermostat. It can't just be removed even if the Hive replaces the existing programmer, if it was just removed, it will remain open circuit and the heating wouldn't come on.