RE: multi-zone central heating

["Neil Ball" <neilball@xxxxxxxxxxxxxxx>]

The costs is cheaper than SK, but all you're buying the basic hardware and
need to develop & implement all of the software strategies yourself
including all of the testing etc. - not as easy as it sounds unless you
hav=
e
both the mechanical engineering knowledge and programming expertise! The SK
system is more like buying a new BMW rather than simply buying in a kit car
& building it yourself without the construction details! Then again I
would
say that as I work for smartkontrols!! ;-)

Neil B.

christopher purves wrote:
> When I say network it is LonWorks 2-wire network - they seem to have
> all=20
> kinds of boxes / pci cards for control although as its industrial its
> not=20
> maplin prices.  They have a starter kit for around =A31000 which
> contains a=20
> card, software and a few devices. Again much cheaper than smart
> controls.=20
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> Chris
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> ----Original Message Follows----
> From: Simon Ryley <simon.ryley@xxxxxxx>
> Reply-To: ukha_d@xxxxxxx
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] multi-zone central heating
> Date: Fri, 21 Jan 2005 13:15:25 +0000
>=20
>=20
> Does anyone know of a central heating programmer / controller with a
> network interface?  Something I can stick on the LAN, then alter the
> settings for via PC or another device?=20=20
>=20
> TIA
>=20
> Simon
>=20
> christopher purves wrote:
>=20
>  > This one has a network interafce :)
>  >
>  > http://europe.hbc.honeywell.com/products/pdf/en0b0235-ge51r0802.pdf
>  >
>  > ----Original Message Follows----
>  > From: Kevin Hawkins <lists@xxxxxxx>
>  > Reply-To: ukha_d@xxxxxxx
>  > To: ukha_d@xxxxxxx
>  > Subject: Re: [ukha_d] multi-zone central heating
>  > Date: Fri, 21 Jan 2005 04:13:33 +0000
>  >
>  >
>  > Does anyone know of a reasonable cost 'proportional' valve in
this
> > format (attach to radiator)  - one where say 0-10V will provide
>  linear  > control from closed to open ? Or failing that where a
>  timed application  > of a voltage will open a valve a certain
degree
>  and it will stay there.  >  > Kevin  >  > Neil Ball
wrote:  >  >
> >These type of actuators are commonly found on underfloor heating 
>
>  manifolds.  > >They do take a while to open & close which
is not a
>  problem with UFH due  > to  > >it's relatively slow thermal
>  response. Biggest benefit is ease of wiring  > and  > >low
cost
>  compared to motor-based actuators. If you are thinking of using  >
>  >them on radiator TRV valve bodies just make sure you get the
right
>  torque > >rating as too high a closing force will damage the
soft
>  valve seats very  > >quickly and stop the valve from shutting
off.=20
>  > >  > >Neil B.  > >-----Original Message----- 
> >From: William
>  Sadler [mailto:ukhad@xxxxxxx] 
> >Sent: Thursday, January
>  20, 2005 17:43  > >To: ukha_d@xxxxxxx  > >Subject: Re:
>  [ukha_d] multi-zone central heating  > >  > >  > > 
> >On the same
>  theme, has any body used these: Thermo-Hydraulic  > >Actuators?
 > >
>  > ><http://www.danfoss-randall.co.uk/Site/downloads/VDSAP112.pdf>
>
>  > > >Which from the online page can be used to replace
thermostatic=20
>  > >radiator valve heads and controlled electrically with 230 or
24=20
>  > >volts.  > >  > >William.  > >  > > 
> >  > >  > >  >  >  >  >  >=20
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