Programmable wireless thermostat

[JonRB]

Quick question...

I've just bought a 7-day programmable wireless room thermostat to replace my current ageing and unreliable non-programmable wireless thermostat.

However, I notice it has separate Hot Water control as well. So does that mean it will also replace my existing time clock? If so, I presume it will be a wire-for-wire replacement in the electrical junction box of the existing time clock and thermostat receiver?

Thanks in advance for any help.

Edited by JonRB on Thursday 1st November 23:33

[Martyn D]

What make is it, only thing I know of that will wireless programme hot water and central heating is the glow work smart wiring centre and Climapro.....I guess there may be others but it will need canbus pulsing to difine between the demand for HW or CH

[JonRB]

The current system is a Drayton Digistat RF1 wireless thermostat, Potterton EP2002 time clock, both wired into a Honeywell distribution box which is stamped "42002116-001"

What I've ordered is a Heatmiser PRTHW-WTS

What I'm *hoping* is that it'll be a wire-for-wire replacement in the Honeywell disto box.

[Martyn D]

JonRB said:

The current system is a Drayton Digistat RF1 wireless thermostat, Potterton EP2002 time clock, both wired into a Honeywell distribution box which is stamped "42002116-001"

What I've ordered is a Heatmiser PRTHW-WTS

What I'm *hoping* is that it'll be a wire-for-wire replacement in the Honeywell disto box.

The receiver unit would kind of replace the time clock, which I'm guessing does both hot water and heating? Re-wire the signal wires that go out of the time clock to become signal wires out of the receiver unit, re-wire the Live and neutral that are in the time clock into the receiver unit...do you have a S plan system (zone valve for hot water and zone valve for heating)?

[Rickyy]

JonRB said:

The current system is a Drayton Digistat RF1 wireless thermostat, Potterton EP2002 time clock, both wired into a Honeywell distribution box which is stamped "42002116-001"

What I've ordered is a Heatmiser PRTHW-WTS

What I'm *hoping* is that it'll be a wire-for-wire replacement in the Honeywell disto box.

Effectively, yes there should be, but figuring out which wires to replace is the difficult part. If you understand the operation of all the heating components and understand basic wiring, it should be straight forward. If not, take as many pictures as possible, post them on here and we'll all give you conflicting advice on how to wire it

[JonRB]

Rickyy said:

Effectively, yes there should be, but figuring out which wires to replace is the difficult part. If you understand the operation of all the heating components and understand basic wiring, it should be straight forward. If not, take as many pictures as possible, post them on here and we'll all give you conflicting advice on how to wire it

Thanks!

And also

[jaybirduk]

I'm waiting for these to launch in the uk

http://www.nest.com/

[Rickyy]

jaybirduk said:

I'm waiting for these to launch in the uk

http://www.nest.com/

That isn't new technology and is already available. Its otherwise known as optimum start, quite a few products available with it.

[JonRB]

Trouble is that they need your thermostat to be wired.

I don't have that luxury.

[Rickyy]

Just read a bit more into that, it is an impressive bit of kit!

[LooneyTunes]

Sorry for the hijack, but does the Nest / optimium start kit take into account radiator coasting or gradual cooling of the house? Our current system oscillates around the set temperature a little more than I'd like and if there's a way to solve by changing the 'stats then I'm all ears!

[Rickyy]

LooneyTunes said:

Sorry for the hijack, but does the Nest / optimium start kit take into account radiator coasting or gradual cooling of the house? Our current system oscillates around the set temperature a little more than I'd like and if there's a way to solve by changing the 'stats then I'm all ears!

Have a google of your stat and see if there is anyway to adjust the hysteresis. Most have a preset hysteresis of 2-3 degrees, which can be a bit much, especially if the stat is in a poor position.

[LooneyTunes]

Thanks Rickyy - will do.

Never occurred to me that it might allow adjustment of that!