Re: Thermostat with RS232

["Paul Robinson" <ukcueman@xxxxxxx>]

Julian,

What components do you need to use to get around the 24V/240V problem? How
are they wired?

TIA,
Paul



----- Original Message -----
From: "Julian Stuhler" <julian.stuhler@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Tuesday, February 25, 2003 10:52 AM
Subject: RE: [ukha_d] Thermostat with RS232


> I took delivery of a TR15 kit last week - it really is a very neat
unit.
> However please be aware that the unit is only designed to switch 24vAC
> and UK heating systems seem to need a thermostat capable of switching
> 240vAC! I also needed to move the location of the thermostat as the
> thermostat and control unit wouldn't talk to each other properly over
> the existing 3-core & earth cabling between the old thermostat and
the
> heating system. I used some 4-core security cable instead and it works
a
> treat.
>
> I had a fun weekend wiring it in but I wasn't able to complete the job
> as Maplins didn't stock the 24vAC relay I needed to allow it to
operate
> the thermostat input on my existing heating system. I eventually
managed
> to order one yesterday (from www.cse-distributors.co.uk). Hopefully
I'll
> be able to complete the job this weekend.....
>
> Julian
>
>
>
> -----Original Message-----
> From: Kevin Hawkins [mailto:lists@xxxxxxx]
> Sent: 25 February 2003 00:17
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Thermostat with RS232
>
>
> RCS do some - the TR15 and TR36
> http://www.resconsys.com/products/stats/serial.htm
>
>
>
> -         but  not cheap - the TR36 is particularly nice as I believe
it
> has
> a graphic LCD display screen and some buttons that can be programmed
to
> display automatically some user defined menus. I have been thinking of
> getting one for a while from the US.
>
>
>
> Kevin
>
>
>
> -----Original Message-----
> From: Dean Smith [mailto:ukha@xxxxxxx]
> Sent: 24 February 2003 23:48
> To: Ukha_D@Yahoogroups. Com
> Subject: [ukha_d] Thermostat with RS232
>
>
>
> I'd like to be able to control the temperature of my CH thermostat
> remotely
> via a PC
>
> One route would be to have Temperature sensors connected to the PC,
and
> then
> have the PC directly control the On/Off of the Central Heating (Which
I
> can
> do now via Comfort and some relays to bypass the timer control for an
> extra
> hour when I want it). I'd like to avoid though having the PC as
> absolutley
> necessary for normal running - prefer it just as a means of varying
the
> temperature when required.
>
> So anybody know of....
>
> A Thermostat capable of switching 240V
> Temperature Set Point controllable via RS232
> being able to Poll the Temp would be a bonus.
> Remote temperature sensor would be Ideal aswell.
>
> And of course it has to be *cheap*. So Honeywell Smartfit is out ;-)
>
> Thanks
>
> Dean
>
>
>
>
>
>
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