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Posted by Bennett Price on September 9, 2006, 12:23 pm
If the only problem is that you don't have 10VDC to the stats, consider
a plug-in-the-wall power supply of the sort used to power CD players,
modems, and the like. Available at Radio Shack.
Peter Pearson wrote:
> My Carrier Comfort Zone Center appears to have failed, and
> I'm trying to educate myself on replacement options. My
> local furnace shop says they don't make these any more and
> a replacement controller will cost $2946 if we can use the
> existing temperature sensors. That seems like a lot.
>
> Here's the equipment running my 4-zone system, which
> really ought to be a 5-zone system but maybe they didn't
> make those when this system was installed, apparently
> in 1991 (I moved here in 2004):
>
> Carrier Crusade gas furnace
> Carrier Comfort Zone Center control box near furnace
> Carrier Comfort Zone 4-zone controller/timeclock
> Zone dampers: PEI / AirPax
>
> In case anyone cares about the problem motivating this
> questions: The "Carrier Comfort Zone Center" is mounted on
> studs near the furnace, gets 24 volts AC from the furnace,
> and is supposed to supply 10 volts DC to the thermostat,
> but instead supplies a voltage varying between 6 and 7
> volts with a regular period of about 0.5 second. The
> circuit boards in the "Comfort Zone Center" look clean,
> and no components are smoking, oozing, or making crackling
> noises.
>
> So,
> 1. Should I pay $2934 to replace this controller?
> 2. Should I consider the style of controller that
> takes input from four thermostats, instead
> of reading four actual temperature sensors itself?
> 3. Should I be looking at X-10 systems? RS485? Can
> I get something that plugs into my house's ethernet
> and provides a browser-based interface?
>
> Much appreciative of suggestions, observations, and even
> illuminating insults.
>
> --
>
> To email me, substitute
> nowhere -> spamcop
> invalid -> net
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