I'm stuck so any advice would be appreciated.

I have an old Honeywell room thermostat attached to a wall with
internal wall wiring. The thermostat used to be connected to a warm air
heating gas boiler. This boiler was replaced by previous owners with a
hot water central heating system. There is no room thermostat control
for the new boiler i.e. the room thermostat is not connected to the new
boiler and the thermostat is basically a relic from the warm air
heating system.

I want to install a new thermostat and I've looked at battery operated
wireless options but I want to use, if possible, a self powered wired
control panel.

The problem is that I can't see any exit point for where the current
and no longer used thermostat would have connected with the old boiler.

Would it have likely connected directly to the boiler, through a
lighting circuit (sounds silly but that's all I can think of) or
something else?

On 14/01/2014 09:17, Gareth Davies wrote:
I'm stuck so any advice would be appreciated.

I have an old Honeywell room thermostat attached to a wall with internal
wall wiring. The thermostat used to be connected to a warm air heating
gas boiler. This boiler was replaced by previous owners with a hot water
central heating system. There is no room thermostat control for the new
boiler i.e. the room thermostat is not connected to the new boiler and
the thermostat is basically a relic from the warm air heating system.

I want to install a new thermostat and I've looked at battery operated
wireless options but I want to use, if possible, a self powered wired
control panel.

The problem is that I can't see any exit point for where the current and
no longer used thermostat would have connected with the old boiler.

Would it have likely connected directly to the boiler, through a
lighting circuit (sounds silly but that's all I can think of) or
something else?


Have you looked near the old boiler location for any signs of cables
which have been chopped off at the point where they emerge from the wall?

Is there/would there have been a control panel/junction box anywhere
else, where all the heating wiring is/was brought together?

What is your objection to wireless stats? They work perfectly well, and
may well be your simplest solution unless you are prepared to install
some new wiring.
--
Cheers,
Roger
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checked.

On 2014-01-14 10:01:55 +0000, Roger Mills said:

On 14/01/2014 09:17, Gareth Davies wrote:
I'm stuck so any advice would be appreciated.

I have an old Honeywell room thermostat attached to a wall with internal
wall wiring. The thermostat used to be connected to a warm air heating
gas boiler. This boiler was replaced by previous owners with a hot water
central heating system. There is no room thermostat control for the new
boiler i.e. the room thermostat is not connected to the new boiler and
the thermostat is basically a relic from the warm air heating system.

I want to install a new thermostat and I've looked at battery operated
wireless options but I want to use, if possible, a self powered wired
control panel.

The problem is that I can't see any exit point for where the current and
no longer used thermostat would have connected with the old boiler.

Would it have likely connected directly to the boiler, through a
lighting circuit (sounds silly but that's all I can think of) or
something else?


Have you looked near the old boiler location for any signs of cables
which have been chopped off at the point where they emerge from the
wall?

Is there/would there have been a control panel/junction box anywhere
else, where all the heating wiring is/was brought together?

What is your objection to wireless stats? They work perfectly well, and
may well be your simplest solution unless you are prepared to install
some new wiring.

Yes, I've used a wireless thermostat before and found it to be very
good to the extent that I questioned why anyone would freshly install
the wiring for a non wireless thermostat.

I was looking in ot fitting a Nest WiFi thermostat for remote use.
Oddly the Nest Thermostat isn't wireless in the sense that it does need
a hard wired connection to the boiler control.

I'm unlikely to be able to find or use the old wiring (likely boarded
up behind the new boiler) so I think I'll have to pass on the idea of
installing a Nest thermostat.

The Nest may be more trouble than it is worth anyway with UK
incompatibilities (for example ? 24V relay inside) that can be overcome
but not really on a diy basis.

Gareth Davies wrote:

I've used a wireless thermostat before and found it to be very
good to the extent that I questioned why anyone would freshly install
the wiring for a non wireless thermostat.

Because I assume anything without wires or with batteries* will fall
prey to interference or flat batteries at the most inconvenient time.

I had a CH timer once that ran on AA batteries, got rudely awaken at
dark o'clock when the batteries had reached such a level that the
controller was switching the boiler and pump on/off at several Hz



* Granted not all wireless stats are battery operated.

It happens that Gareth Davies formulated :
I'm stuck so any advice would be appreciated.

I have an old Honeywell room thermostat attached to a wall with internal wall
wiring. The thermostat used to be connected to a warm air heating gas boiler.
This boiler was replaced by previous owners with a hot water central heating
system. There is no room thermostat control for the new boiler i.e. the room
thermostat is not connected to the new boiler and the thermostat is basically
a relic from the warm air heating system.

I want to install a new thermostat and I've looked at battery operated
wireless options but I want to use, if possible, a self powered wired control
panel.

The problem is that I can't see any exit point for where the current and no
longer used thermostat would have connected with the old boiler.

Would it have likely connected directly to the boiler, through a lighting
circuit (sounds silly but that's all I can think of) or something else?

BT have a little gadget which you clip on one end of a wire, then a
portable pen like very sensitive receiver able to trace wires under
floor and in walls, back to the other end. The first part injects a
radio frequency, the second is just a receiver.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

On 14/01/2014 10:06, Harry Bloomfield wrote:
BT have a little gadget which you clip on one end of a wire, then a
portable pen like very sensitive receiver able to trace wires under
floor and in walls, back to the other end. The first part injects a
radio frequency, the second is just a receiver.

Do you have a link to such a gadget? Sounds useful.

Jon Connell wrote:

On 14/01/2014 10:06, Harry Bloomfield wrote:

BT have a little gadget which you clip on one end of a wire, then a
portable pen like very sensitive receiver able to trace wires under
floor and in walls, back to the other end. The first part injects a
radio frequency, the second is just a receiver.

Do you have a link to such a gadget? Sounds useful.

http://www.ebay.co.uk/bhp/cable-tracer

Andy Burns explained on 14/01/2014 :
Jon Connell wrote:

On 14/01/2014 10:06, Harry Bloomfield wrote:

BT have a little gadget which you clip on one end of a wire, then a
portable pen like very sensitive receiver able to trace wires under
floor and in walls, back to the other end. The first part injects a
radio frequency, the second is just a receiver.

Do you have a link to such a gadget? Sounds useful.

http://www.ebay.co.uk/bhp/cable-tracer

They are very useful, mine is the proper BT item and detects around a
couple of feet away, at maximum sensitivity setting. I paid a couple
pounds for it at a boot sale, in a case.

They are OK to connect to a live phone cable, but not mains live.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

On 14 Jan 2014, Harry Bloomfield
grunted:

Andy Burns explained on 14/01/2014 :
Jon Connell wrote:

On 14/01/2014 10:06, Harry Bloomfield wrote:

BT have a little gadget which you clip on one end of a wire, then a
portable pen like very sensitive receiver able to trace wires under
floor and in walls, back to the other end. The first part injects a
radio frequency, the second is just a receiver.

Do you have a link to such a gadget? Sounds useful.

http://www.ebay.co.uk/bhp/cable-tracer

They are very useful, mine is the proper BT item and detects around a
couple of feet away, at maximum sensitivity setting. I paid a couple
pounds for it at a boot sale, in a case.

Blimey, I've heard of those but had no idea they were so cheap! I'd always
envisaged a big briefcase-sized oscilloscope-type device costing £100s -
with hindsight I really don't know why. When I think of the time I could
have saved over the years if I'd had one of those in my collection...

--
David

In message , Harry
Bloomfield writes
Andy Burns explained on 14/01/2014 :
Jon Connell wrote:

On 14/01/2014 10:06, Harry Bloomfield wrote:

BT have a little gadget which you clip on one end of a wire, then a
portable pen like very sensitive receiver able to trace wires under
floor and in walls, back to the other end. The first part injects a
radio frequency, the second is just a receiver.

Do you have a link to such a gadget? Sounds useful.

http://www.ebay.co.uk/bhp/cable-tracer

They are very useful, mine is the proper BT item and detects around a
couple of feet away, at maximum sensitivity setting. I paid a couple
pounds for it at a boot sale, in a case.


Do BT realise that their kit was on sale at a boot sale? I hope it came
with reliable provenance.


These devices are very good for cable tracing, I have 3 pairs, keeping
at least 1 in the car kit for when I'm on site.

The receiver section is also very good for detecting live cables in
walls.


--
Bill

On 14/01/14 09:17, Gareth Davies wrote:
I'm stuck so any advice would be appreciated.

I have an old Honeywell room thermostat attached to a wall with internal
wall wiring. The thermostat used to be connected to a warm air heating
gas boiler. This boiler was replaced by previous owners with a hot water
central heating system. There is no room thermostat control for the new
boiler i.e. the room thermostat is not connected to the new boiler and
the thermostat is basically a relic from the warm air heating system.

I want to install a new thermostat and I've looked at battery operated
wireless options but I want to use, if possible, a self powered wired
control panel.

The problem is that I can't see any exit point for where the current and
no longer used thermostat would have connected with the old boiler.

Would it have likely connected directly to the boiler, through a
lighting circuit (sounds silly but that's all I can think of) or
something else?

normally goes to a motorised valve


--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.

Gareth Davies wrote in news:52d500ac$0$1161$5b6aafb4
@news.zen.co.uk:



As the old stat conrolled a warm air unit the wiring would most likely
gone direct to the heater.

Hunt around in the cupboard where the old heater was. The heater may well
have been a slot in type in which case the old location may have boarded
over. In this case you may be unable to find any remaining wires.

On 2014-01-14 17:40:08 +0000, Heliotrope Smith said:

Gareth Davies wrote in news:52d500ac$0$1161$5b6aafb4
@news.zen.co.uk:



As the old stat conrolled a warm air unit the wiring would most likely
gone direct to the heater.

Hunt around in the cupboard where the old heater was. The heater may well
have been a slot in type in which case the old location may have boarded
over. In this case you may be unable to find any remaining wires.

Thanks.

I fear you are correct about the original location being boarded up
with the wires boarded up too.

The new boiler is sitting on a wooden board against an outside wall
which is obviously where the old warm air boiler was fitted. There's no
sign of the old wiring which must have been fed directly to the warm
air boiler.

Oh well.