On Tue, 23 Nov 2004 15:32:24 +0000, Tim S wrote:

Hello,

Interesting query: I've been looking at various of the above and found
some interesting units such as the Honeywell CM67 and also units made by
Danfoss and Sunvic.

What I'm considering doing with a CH upgrade is rather than setting up a 2
(or 3 or 4) zoned system, I'd rather have electric valves on each radiator
(thermo-hydraulic actuators) and a local room timer-thermostat. Maximum
flexibility.

Then I find the above RF capable units and think "hmmm - less wiring..."
Fused spur off the ring near each rad and one receiver and actuator
and I'm done...

But, I have a problem... how to turn the CH pump on or off. So I'm
thinking, I wondering if any of those units can drive multiple receivers,
so the second set of receivers can be wired in parallel to generate a
"demand" signal which I used to control the pump.

The Honeywell unit looks the best on paper as it's using the newer 868MHz
RF band and uses a short pulsed signal. So in theory one should be able to
set two receivers to the same code as one thermostat unit and have it work.??

Anyone ever tried this or have an alternative idea for doing something
similar?

Ta muchly

Timbo

I haven't done this, but I am fairly certain that it would work
because part of the installation is to pair up the receiver with the
transmitter. You would simply do that on multiple receivers.

There is no return path to the transmitter so it would have no way of
knowing.




--

..andy

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