Heating water with Nest

NotVeryHappy

Basic question

Recently got a nest installed and have a question

It's an apartment with an "ideal classic" gas boiler. The installer installed the heatlink and set the nest up in the sitting room. We had an old thermostat in the hall which the installer kept

He told us that if we want hot water AND heating to have the old thermostat turned to a high temp and tell the nest to turn on

In contrast, if we only want hot water, turn the old thermostat to a low temp and tell the nest to turn on. This seems like it removes a lot of the benefits of a nest. I thought the 3rd gen nest could control the water separately? Perhaps it's an issue with the type of boiler I have? I don't know whether it's a system/combi/whatever so if someone could answer that it would be great

DGOBS

Its not the boiler, it's the way your system is plumbed/setup (incorrectly)

You haven't truly got a 2 zone setup, you have a single motorised valve, controlled by a room stat.
If you looked at the wiring of this motorised valve, you'll find the installer cut away 2 wires (the orange and grey) known as the microswitch.

These wires allow the valve to control the boiler, and for true 2 zones, you should have 2 of them, both in control of the boiler demand.
Unfortunately you don't.

NotVeryHappy

DGOBS wrote: »

Its not the boiler, it's the way your system is plumbed/setup (incorrectly)

You haven't truly got a 2 zone setup, you have a single motorised valve, controlled by a room stat.
If you looked at the wiring of this motorised valve, you'll find the installer cut away 2 wires (the orange and grey) known as the microswitch.

These wires allow the valve to control the boiler, and for true 2 zones, you should have 2 of them, both in control of the boiler demand.
Unfortunately you don't.

Thanks.

So if I wanted to get it fixed would it be expensive?

DGOBS

you would want a second motorised valve fitted and wiring ran where required.