Re: UFH Control & CBus

["Frank Mc Alinden" <fmcalind@xxxxxxxxxxxxxx>]

Hi Kevin

> Using something like Justins TOM10 board and either a direct
> serial connection, Ethernet via an MSS100, or xAP / xPL conduits both
of
> which are freely available there are lots of options here. The board
> handles 10 remote temperature sensors and the cable runs can be quite
long.

Im using Justins TOM10 board connected to one of your  mss100 units using
xPL-TOM10  and this is currently controlling the bedroom sweep fans(which
are connected to cbus relays)  i dont have an attractive housing for the
Dallas sensors  but there was a recent post to the hv list regarding this
and it looked quite good.......

Frank




----- Original Message -----
From: "Kevin Hawkins" <lists@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, January 06, 2005 1:00 PM
Subject: Re: [ukha_d] UFH Control & CBus


>
>
> I have found the C-Bus internal temp sensor is not really very
suitable
> for temperature control of a room - it has a very wide hysteresis and
> only reports in 1 degree increments AFAIK so you rooms will have quite
> wide temperature fluctuations - 2 degrees at least. In fact mine
varies
> by as much as 4 degrees due to overshoots caused by the heat retention
> in the heavy old cast iron radiators using standard ON/OFF zone
valves.
> I am firmly convinced proportional valves/feedback is the right way to
> do this, but I haven't done it yet.  At UKHA 2003 , almost  two years
> ago Graham C from Clipsal said that they were about to release room
> thermostats which would be a new product with much better suitability
> for local heating control and possibly local setpoint adjustments -
but
> I haven't seen anything since :-(
>
> If you are prepared to roll your own then the Dallas sensors are much
> more sensitive and very tiny -(but we could do with a nice mounting
> option). Using something like Justins TOM10 board and either a direct
> serial connection, Ethernet via an MSS100, or xAP / xPL conduits both
of
> which are freely available there are lots of options here. The board
> handles 10 remote temperature sensors and the cable runs can be quite
long.
>
> Kevin
>
>
>
> markttay wrote:
>
> >I was hoping to use SmartKontrols for UFH control in the house I
am
> >building but was put off by the cost which came out around £760
> >per
> >zone/room for design and supply.
> >
> >While I appreciate that it is far less sophisticated, it struck me
> >that I could have programmable temperture control using the Cbus
> >Indoor Temperature sensors and some more relays to switch the UFH
> >manifold actuators. This would work out around £140 per room/zone
> >on
> >the same basis, and while the whole lot would have to be
programmed,
> >I assume there would be the opportunity to do some integration
with
> >other Clipsal input units such as PIR occupancy sensors etc.
> >
> >I do think that the CBus sensor is pretty ugly and nowehere near
as
> >descrete as SmartKontrols, but it is a much cheaper (weird saying
> >that about any CBus stuff!) or so it seems.
> >
> >I am a novice in this area and know that heating control has been
> >debated at length on this forum, but if anyone has used CBus for
> >this purpose or can suggest a better alternative, I would be very
> >interested. I am not keen on going for a home-brew option as I am
> >not competent enough to install and maintain it and want to stick
> >with standard solutions.
> >
> >Thanks
> >
> >
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>