RE: HA control of your Air Con unit

["Mick Furlong" <dorsai@xxxxxxx>]

Disable the contols except for on/off which should be left for safety
purposes. Or alternatively disconnect the buttons from the unit and connect
them t  your HA controller, a bit of noddy programming and you get pseudo
local control....control---->HA Controller->>>>>>Unit.
Of course if the HA
controller is down then no AC ;) you pays your money....you takes your
choice.

Mick

Keith Doxey <ukha@xxxxxxx> said:

> No feedback is NOT a good idea.
> For example the "Mode" button on the Aircon cycles round
Fan,Cool,Heat. If
> someone has pressed the button to turn Cooling on and HV presses the
button
> you will turn the cooling off and heating on. It probably wouldnt heat
the
> house as the room temp would be higher than the temp setting, unless
you has
> a powercut whereby the heat setting would have defaulted t  26C.
>
> As you say, you can get to a "Known State" by using an AM to
reset the unit
> but you would have to do that EVERY time you wanted t  adjust it just
incase
> someone had pressed a button :-(
>
> Keith
>
> -----Original Message-----
> From: Ian Bird [mailto:I.Bird@xxxxxxx]
> Sent: 05 July 2001 10:17
> To: Ukha_d
> Subject: [ukha_d] HA control of your Air Con unit
>
>
> Having read the previous post about automating the Homebase A/C units
I was
> just wondering..
>
> I have HomeVision but am currently using most of the relay output
ports for
> my watering valves. I know Port C can be configured for output but can
only
> drive ttl, cmos, leds or similar. I don't see any reason why this
could not
> drive a transistor and that in turn either simulate the switch or a
relay to
> simulate the switch (depending on the requirements). That would give
HV
> control over the unit with manual override available (but no
feedback).
>
> This is something I might look into soon(ish) as it would be dead
useful.
> The lack of feedback would not bother me particularly as I could
always
> reset the unit using an appliance module e.g. prior to turning it on.
>
> If you don't have HV then back t  the drawing board. If this and
another
> interface could be designed into the same unit then let me know and
we'll
> think about it.
>
> Phil - have you taken off the panel or whatever yet (defeated the anti
> tamper screws)?
>
> Ian
>
>
>
>
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