Apologies for a query I know has come up a few times in the past but
whilst all the previous topics answer some of the questions I have,
I'm still not sure it answers my query.

Currently have an oldish conventional boiler located in the kitchen.
The cistern and programmer are located together in the airing
cupboard. The programmer currently is a Danfoss FP715 Si(or variation
thereof but it seems to match my setup), on a standard wallplate, I
can set independent times for HW and CH. There is no room thermostat
(wired or otherwise) in the house. The radiators in all rooms bar
bathroom have TRV controls(bathroom rad is bypass I beleive).

Is it possible (and does it actually exist) to install some form of
wireless thermostat/programmer and retain the current functionality?
The ideal situation will be to install some form of wireless
transmitter in the hall that will act as the thermostat for the CH
(that I can program times/temperatures) but also allow me to set HW
timers from there (we only currently set the HW to be on a couple of
hours a day so I'm not sure I need some form of thermostat/temp
control for the water).

If that isn't possible the other alternative is to retain the
programmer functionality within the airing cupboard but incorporate a
wireless thermostat for the CH only. Again I'm not sure if that exists
without requiring extra wiring at the programmer which I want to avoid
if possible.

I guess my main requirements or ideals are to retain the standard
wallplate and gain some form of thermostat control elsewhere in the
house without the need for wires. Retaining the 7 day programming
capability is the other ideal due to shift work/part time work that
family members do so we have different heating profiles each day
currently.

I've seen things like the Danfoss TP7000RF but I don't think that this
retains the control of the HW from the programmer, also the receiver
looks like it won't just clip onto the existing wallplate.

Thanks in advance for any help.

In an earlier contribution to this discussion,
Woby Tide wrote:

Apologies for a query I know has come up a few times in the past but
whilst all the previous topics answer some of the questions I have,
I'm still not sure it answers my query.

Currently have an oldish conventional boiler located in the kitchen.
The cistern and programmer are located together in the airing
cupboard. The programmer currently is a Danfoss FP715 Si(or variation
thereof but it seems to match my setup), on a standard wallplate, I
can set independent times for HW and CH. There is no room thermostat
(wired or otherwise) in the house. The radiators in all rooms bar
bathroom have TRV controls(bathroom rad is bypass I beleive).

Is it possible (and does it actually exist) to install some form of
wireless thermostat/programmer and retain the current functionality?
The ideal situation will be to install some form of wireless
transmitter in the hall that will act as the thermostat for the CH
(that I can program times/temperatures) but also allow me to set HW
timers from there (we only currently set the HW to be on a couple of
hours a day so I'm not sure I need some form of thermostat/temp
control for the water).

If that isn't possible the other alternative is to retain the
programmer functionality within the airing cupboard but incorporate a
wireless thermostat for the CH only. Again I'm not sure if that exists
without requiring extra wiring at the programmer which I want to avoid
if possible.

I guess my main requirements or ideals are to retain the standard
wallplate and gain some form of thermostat control elsewhere in the
house without the need for wires. Retaining the 7 day programming
capability is the other ideal due to shift work/part time work that
family members do so we have different heating profiles each day
currently.

I've seen things like the Danfoss TP7000RF but I don't think that this
retains the control of the HW from the programmer, also the receiver
looks like it won't just clip onto the existing wallplate.

Thanks in advance for any help.

I'm not aware of anything which will replace your existing programmer and do
exactly what you want without any wiring changes. However, you *should* be
able to achieve the desired result with only minimal wiring changes.

You can keep the existing programmer and let it continue to control the HW.
But, for CH, set the programmer to 'Continuous' and use a programmable
thermostat (wired or wireless) to do the actual timing and temperature
control. The small wiring change is that you will need to locate the CH
demand output wire from the existing programmer and divert it so that it
goes via the programmable stat.

[In giving this answer, I'm taking at face value your statement that you
currently have independant control of CH and HW, which I interpret as having
a fully pumped system with appropriate motorised zone valves, etc. If you've
*actually* got a gravity HW and pumped CH system of the sort where you
cannot have *just* the CH on, what I said above doesn't apply].
--
Cheers,
Roger
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Roger Mills wrote:

I'm not aware of anything which will replace your existing programmer and do
exactly what you want without any wiring changes. However, you *should* be
able to achieve the desired result with only minimal wiring changes.

You can keep the existing programmer and let it continue to control the HW.
But, for CH, set the programmer to 'Continuous' and use a programmable
thermostat (wired or wireless) to do the actual timing and temperature
control. The small wiring change is that you will need to locate the CH
demand output wire from the existing programmer and divert it so that it
goes via the programmable stat.

Depending on the boiler, it may even have separate connections available
for a programmer and a stat. If that were the case then its even easier
- just add a prog stat (wired or wireless) and use the programmer as you
describe (i.e. control the HW, and leave on continuous for CH).

--
Cheers,

John.

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Woby Tide wrote:
Apologies for a query I know has come up a few times in the past but
whilst all the previous topics answer some of the questions I have,
I'm still not sure it answers my query.

Currently have an oldish conventional boiler located in the kitchen.
The cistern and programmer are located together in the airing
cupboard. The programmer currently is a Danfoss FP715 Si(or variation
thereof but it seems to match my setup), on a standard wallplate, I
can set independent times for HW and CH. There is no room thermostat
(wired or otherwise) in the house. The radiators in all rooms bar
bathroom have TRV controls(bathroom rad is bypass I beleive).

Is it possible (and does it actually exist) to install some form of
wireless thermostat/programmer and retain the current functionality?

Just install the stat in series with the current progrmmed output.

That what I did.

Its basically simply a relay that closes on 'call for heat'



The ideal situation will be to install some form of wireless
transmitter in the hall that will act as the thermostat for the CH
(that I can program times/temperatures) but also allow me to set HW
timers from there (we only currently set the HW to be on a couple of
hours a day so I'm not sure I need some form of thermostat/temp
control for the water).


Thats a bit of an ask.

If that isn't possible the other alternative is to retain the
programmer functionality within the airing cupboard but incorporate a
wireless thermostat for the CH only. Again I'm not sure if that exists
without requiring extra wiring at the programmer which I want to avoid
if possible.

no more than intercepting the switched live feed out of it. It MST have
a separate DHW/CH switched feed to control the motorised valves.



I guess my main requirements or ideals are to retain the standard
wallplate and gain some form of thermostat control elsewhere in the
house without the need for wires. Retaining the 7 day programming
capability is the other ideal due to shift work/part time work that
family members do so we have different heating profiles each day
currently.

I've seen things like the Danfoss TP7000RF but I don't think that this
retains the control of the HW from the programmer, also the receiver
looks like it won't just clip onto the existing wallplate.

Thanks in advance for any help.