RE: Control of ventilation system

["Hawes,Timothy Edward \(GEG\)" <haweste@xxxxxxxxxxxxxxx>]

Martin,

Have you got an installation drawing for the system - something to show
you what wires to connect to where etc. ?
Does the unit have a central control box that the basic control panel
plugs into or are the fans etc. wired individually.
If you have a drawing please post it somewhere, or send it to me
off-list and I'll do what I can to interpret it.

I see on the UK_Selfbuild list there was a suggestion to use an
intelligent relay (Siemens Logo et al) but you could also consider the
NetIOM and the Web Brick, both are xAP-able (maybe xPL too, I'm not
sure) and can switch outputs based on inputs etc. IIRC they also have a
limited number of analogue I/O. The Web Brick also has a Dallas 1-Wire
input so you can connect a temp sensor. A further alternative may be the
Barionet unit from Barix/Laser. IIRC this has been xAP-ed too and, like
the Web Brick, has a 1-Wire interface.

Web Brick www.o2m8.com
NetIOM http://www.phaedrusltd.com/system/index.html
Barionet http://www.laser.com/?laserlink=HABARIONET

HTH,

Tim.


> -----Original Message-----
> From: Martin Howell
>
> I have a Villavent whole-house ventilation system, and its v good.
> However, the controls are very on/off and manual, and I would
> like to apply some intelligence to it - for example: in the
> winter, monitor outside temperature and stop the intake of
> air if it drops below a certain temperature;  in the summer,
> turn the fans on to 'boost' if the temp in the house gets too
> high, and so on.
>
> Does anyone here a) have a system like this that they have
> taken control of, and/or b) know what the control panel
> signals are likely to be so that a PC could simulate 'em?
> I've tried talking to the company, and they're as much help
> as a chocolate teapot.
>
> Martin