Fw: Can any electric genius pass their eyes over this please ? Thermostat Q

[Gareth Cook <g@xxxxxxxxxx>]

Hi Frank - thanks.

For the temp, because this UFH is slow to respond, you would prob just
leave the temp. alone - and it's based upon the floor limit sensor anyway.

I figured I would have to use relays - but what do you make of the 18AWG
cable tho for pilot wire use ??

For the room thermostats, they have a 240vac feed, and a 240vac load -
which goes to the mat. The pilot wire has it's own connection into the
stat.

G.

Hi Gareth

Ok had a quick read and to me it appears the pilot outputs are 240v....The

specs on page 4 state
Pilot wire Output...60mA per output / 230VCA......should be  (240VAC) I
think a misprint....


> Im struggling to get to grips with exactly what load the
"pilot" wire
> takes , which allows the TH134 to control multiple rooms. Handy Heat
say
> 12v, but Im sure this manual says 240 but over 18AWG cable (isnt CAT5
> 22awg ??)

Yes it appears to switch 240v .....BUT... you would need to confirm this
on
the bench....

Im guessing that each Room Thermostat that you mentioned has a 240v relay
which can switch the current to the floor mats (im assuming they are
240vac).......If they do have a 240v relay then the pilot wire would
control
the coil of the relay......I would NOT switch 240v using cat5 cable....

> At the end of the day, I'd like to NOT have a TH134 and use either
Comfort
> or CBUS relays to do the timing portion. I'll leave temp reading
alone.

So are you saying that the Intelligent thermostat can maintain the temp
but
only if Comfort says it ok to turn ON....????...If so then you need to
wire
the pilot outputs via relay contacts controlled by comfort and then to the

room stats ......If this is the case then i would suggest using Omron
relays
i mentioned to John Benfield only you would require 12v coils...Bellow is
the part numbers for the bases and 240v coil version from RS
Components.........

single pole relay base   353-944
single pole 240v relay   353-865

double pole relay base  353-966
double pole 240v relay 353-916

HTH
Frank

----- Original Message -----
From: "Gareth Cook" <g@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, March 09, 2006 8:48 AM
Subject: [ukha_d] Can any electric genius pass their eyes over this please
?
Thermostat Q


> OK, I'm looking at the carbon heating mats for UFH, and Im trying to
> understand what I need to do.
>
> My understanding at the moment is I have a dumb "thermostat"
in each
room
> (in fact, it only has the floor limit thermostat in), and then you
have
a
> TH134 central controller.
>
> Im struggling to get to grips with exactly what load the
"pilot" wire
> takes , which allows the TH134 to control multiple rooms. Handy Heat
say
> 12v, but Im sure this manual says 240 but over 18AWG cable (isnt CAT5
> 22awg ??)
>
> At the end of the day, I'd like to NOT have a TH134 and use either
Comfort
> or CBUS relays to do the timing portion. I'll leave temp reading
alone.
>
> Heres the link to the TH134 -
> http://www.aubetech.com/products/produitsDetails.php?noProduit=17
- The
> PDF on that page is just 2 pages big.
>
> PDF Link
> http://www.aubetech.com/manuel/2/TH134.pdf
>
> Thanks all !
>
> G.
>
> Gareth Cook
> Tools and Process Architect
> IBM SWG Sales - Lotus Park, Staines, TW18 3AG
> Office: +44 (0)1784 445166 - Mobile: +44 (0)7980 445166
> AIM Chat : TheBoyG - MSN Chat : chat@xxxxxxx
> email: g@xxxxxxx
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