[Hai-users] Multiple Thermostats per zone

buzz2241 at sasktel.net buzz2241 at sasktel.net
Fri Jul 28 12:31:41 CDT 2006 

The sensor wou;ld be great it automating the shutdown when no one is around, the only thing is the warm will not warm up or cool right away - the room will take time to adjust - how much will depend on the temperature differences. I think your idea will work just fine if you create a program / button function that will allow you to start the adjustment of the room 1-2 hours before using the room.

----- Original Message -----
From: Jean-Claude Provost <jc.provost at sympatico.ca>
Date: Friday, July 28, 2006 5:20 am
Subject: RE: RE: [Hai-users] Multiple Thermostats per zone

> Hi,
> 
> Other than the fact that I personally would put a shorter timer 
> (say 5
> minutes), I think it's a great idea. 
> 
> 
> Cheers from Varennes, Quebec Canada,
> 
> JC 
> -----Original Message-----
> From: hai-users-bounces at tssi.com [hai-users-bounces at tssi.com] On
> Behalf Of Rutherford, Austin
> Sent: Thursday, July 27, 2006 3:54 PM
> To: hai-users at tssi.com
> Subject: RE: RE: [Hai-users] Multiple Thermostats per zone
> 
> Hmmm...  I am starting to think that the easiest way would be to 
> put a
> motion sensor in the HT and when there is "Occupancy" turn on the HVAC
> fan and it can recirculate the air between the HT and other parts 
> in the
> basement.  I already have three zones and I think that it would be
> difficult to add a 4th zone for the HT now that the basement is 
> finished(also my zone controller is for only three zones!)
> 
> How does my alternative idea sound? When the sensor is triggers 
> turn a
> occupancy flag on for 60 minutes.(then it will keep extending 
> occupancyevery time the sensor trips) and I can have the HVAC fan 
> in the basement
> turn on when the occupancy flag is on and turn it off when the 
> occupancyflag goes to off.
> 
> Thoughts?
> 
> Thanks,
> Austin
> 
> -----Original Message-----
> From: hai-users-bounces at tssi.com [hai-users-bounces at tssi.com] On
> Behalf Of buzz2241 at sasktel.net
> Sent: Thursday, July 27, 2006 1:03 PM
> To: Brad
> Cc: hai-users at tssi.com
> Subject: Re: RE: [Hai-users] Multiple Thermostats per zone
> 
> I have 2 furnaces in my house, but each furnace is divided into 2 
> zoneswith omni controlled dampers in the ducts. Each furnace has one
> thermostat, but a temperature sensor placed on the other zone of each
> furnace tells my omni to open or close the damper as required to keep
> the 2nd zone at the correct temperature. the damper is very sensitive
> and takes 5 minutes to go from full close to full open. The major 
> lessonI learned is to be patient with the damper adjustment - you 
> are not
> going to change the temperature in a few minute period.......
> 
> 
> Are you able to place a damper (or two) in your home theatre room
> duct(s) with its own temperature sensor there - you could then use the
> omni to control the damper?
> 
> If not - in your case - you do need one of your tstats to be the 
> masterand one to be the slave so they don't over cycle the heating 
> / cooling
> unit - but there are also ramp up and ramp down times to consider as
> well....
> 
> Does anyone know if the omni (or other compatible thermostat) can be
> used in a master slave configuration? 
> 
> ----- Original Message -----
> From: Brad <looney2ns at sigecom.net>
> Date: Wednesday, July 26, 2006 3:04 pm
> Subject: RE: [Hai-users] Multiple Thermostats per zone
> 
> > This is not trivial to accomplish. To add to others comments, I 
> highly
> > recommend you talk to a reliable HVAC installer about doing this.
> > 
> > -----Original Message-----
> > From: hai-users-bounces at tssi.com [hai-users-bounces at tssi.com] On 
> > Behalf Of LarryH
> > Sent: Wednesday, July 26, 2006 4:50 PM
> > To: hai-users at tssi.com
> > Subject: Re: [Hai-users] Multiple Thermostats per zone
> > 
> > It is not common to put two thermostats on a single zone.  I'm 
> not 
> > sure how a setup like that would really work.  I suppose if they 
> were 
> > in parallel than the zone would heat or cool if either of the 
> stats 
> > called for a cycle.
> > I don't think this setup would have a good result.  Many stats 
> (like 
> > the RC
> > series)  have settings for a maximum number of cycles per hour, 
> and a 
> > required off time between cycles.  Much of this is to promote 
> > efficiency by regulating short cycling or to protect the 
> equipment.  
> > Multiple stats doesn't play well with this type of setup.  I 
> believe 
> > there are some products out there which can have multiple 
> temperature 
> > sensors going to a single stat.  The stat then does some type of 
> > temperature averaging.  I believe the custom stat which goes 
> with the 
> > Rheem/Rudd modulating furnace can be setup this way.
> > 
> > If the temperature demands are different in the two areas, you 
> should 
> > probably look at getting it zoned.  With air based 
> heating/cooling, 
> > it's not
> > 
> > always easy to micro-zone a house.  The equipment needs a 
> certain 
> > minimum air flow to work safely for heat and to prevent freeze-
> up with
> 
> > cooling.
> > 
> > ----- Original Message -----
> > From: "Rutherford, Austin" <Austin.Rutherford at cognos.com>
> > To: <hai-users at tssi.com>
> > Sent: Wednesday, July 26, 2006 3:07 PM
> > Subject: [Hai-users] Multiple Thermostats per zone
> > 
> > 
> > > Hello all,
> > > I am in the final stages of finishing my basement.  One of the
> > rooms is
> > > a home theater and am considering putting a thermostat in 
> there -
> > but
> > > there is already a thermostat in another room on that zone.  
> Is it 
> > > reccomended/supported/common to put two thermostats in different
> > rooms> on the same zones?  It would be for heating/cooling.  The
> > hookup to the
> > > OP2 would be easy, but I am guessing that I would have to wire
> > the HVAC
> > > in parallel with the existing thermostat.
> > >
> > > Thoughts/suggestions?
> > >
> > > Thanks,
> > > Austin
> > >
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