Adding a RTS1 thermostat to central heating

[Scooby42]

Hi, While my house was rented out the boiler was replaced with a Logic Combi ESP35 with a Drayton LP111 Timer. For some reason they didnt include the room thermostat RTS1 in the wiring and the wires are just unconnected in the airing cupboard so my heating is either on or off via the timer. There are 4 wires from the room stat - Live Neutral Earth and the call for heat. The boiler has the left 2 wires (Grey and Black) connected to the Timer/Thermostat circuit and they go to the LP111 backplate to postion 1 (Black) and 3 (Grey). What im strugging is where do I connect the call for heat from the thermostat? Im assuming the other 3 (live/Neutral and Earth) go to the boiler L N & E

 

[Stuckinarut]

The call for heat should leave your time clock to the common of the room thermostat and that should then switch live back to your boiler. You may have to add some wiring or go for wireless thermostat. Have you asked them why they didn't connect it?

 

[RandomGrinch]

As above, do you know where the cable from the thermostat goes to?
There doesn't appear to be an old style (red and black) twin and earth cable behind the programmer, or near the boiler?

However...

For some reason they didnt include the room thermostat RTS1 in the wiring and the wires are just unconnected in the airing cupboard

The airing cupboard is not the best placement for the thermostat anyway - the best place would be in the coolest room in the house, not the warmest cupboard!

EDIT - sorry, I may have misread that, do you mean the other end of the cable from the RTS1 backplate?
Are these loose wires near to the boiler/programmer?

Personally, I would plonk a Hive for combi (single channel), on the LP111 backplate.
No wiring changes would be required; it should just work, and the thermostat could be placed in a more convenient location.

 

[Scooby42]

Thankyou for your replies.

Ive no idea who installed it - the house was managed by someone at the time who is long gone and ive only just moved back in. But basically the thermostat is located downstairs in the hallway but the wiring goes back upstairs to the cupboard on the landing where the boiler is now installed but is not connected to anything. The old boiler was previously downstairs in the kitchen with a hot tank upstairs in the cupboard but the tank is now gone and the new boiler is there now instead of the previous location in the kitchen.

A Hive for combi is mentioned - Im not a heating person - more IT lol - but I take it that something I can just get at Screwfix? and use instead of the LP111?

 

[Stuckinarut]

I take it that something I can just get at Screwfix? and use instead of the LP111?

Yes, doesn't have to be Hive, but would need to be wireless programmable. Best would be an industry standard backplate.