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kostia 08-17-2010 06:57 PM

2 zone damper 2 thermostat wiring help
I was replacing honeywell manual thermostats through the house and everything was going great until I did not notice and did not realize that wiring on the 2nd floor of the house is different. i have 2 zones controlled through dempers (1 cooling unit + 1 heating unit) 2 thermostats: 1 in the master bedroom with on/off switch one in guest room without on/off switch.
So when I took off the master bedroom thermostat I did not notice until it was too late that there are 6 wires.
I was able to get things working up to a certain point, when air or heat turns on in the master bedroom both zones are being cooled or heated, however as soon as temperature is reached in master bedroom everything shuts down.
Similarly the change in temperature setting on the thermostat in the guest room would not turn on either heat or cooling in that zone.
Two possibilities 1 it never worked right (I just bought a house) or is working as designed 2 my wiring is screwed up.
In the master bedroom I have LUX TX9000TS
Brown wire Connected to Y
Red Wire Connected to RH (jumper in between RH and RC)
White Connected to W
Green Connected to G

I am left with Yellow and Blue Wires. Connecting them to Yellow to Y shuts demper in MB even though it should be on. Connecting Blue to Y and increasing temperature on guest room thermostat shuts off air conditioner unit (fan still on).

Can anybody explain what is the connection combination?
Thanks a lot

beenthere 08-17-2010 07:15 PM

Need to know the brand and model number of your zone panel.

And what wires are connected where on it.

kostia 08-17-2010 08:15 PM

From what I can tell it is a trolatemp auto opposed blade demper with mastertrol minizone 2? Now that you pointed me out to this I found schematics, that I will try to understand. As far as I can tell everything is matching schematics.
At the system brown and blue wires are not connected.

I think I wired the MB incorrectly only I am not sure how it is supposed to be.
Thanks in advance for any advice and help

I am almost there..
I connected yellow wire to Y, white to W, green to G, blue to B, and brown to O with red going to RH jumped to RC. Guest room now turns on and off both air conditioner and fan independently of master. However master demper does not turn off air flow when AC is on and temperature is set to above current. Almost there..i think...but still need some help..

kostia 08-19-2010 08:21 PM

No suggestions?

beenthere 08-20-2010 04:10 AM

What wires are connected where on the new stat for the master

Why did you connect the blue and brown wires, if they aren't connected tot he panel.

kostia 08-20-2010 07:09 AM

I am just trying all possible combinations. I know that 4 wires (WYRG) does not do anything on their own. I know that introducing 2 additional wires makes GR control to start and shut down the system. Now the only thing that I need to get working is for MB controlled demper to shut down when needed.
May be those Blue and Brown on the attic at the controller is something else?
I will go up again as soon as I can probably tomorrow morning and try to figure things out. In a meantime my connections are:
Blue ->B
Brown to O
Red to RH jumped to RC
This results on/off through either thermostat, GR demper seems to be working, but MB demper is not.

beenthere 08-20-2010 03:39 PM

Didn't you say that those 2 wires weren't connected with the original thermostat?

If they weren't. You shouldn't need them now.

good luck

kostia 08-20-2010 04:12 PM

I meant at the mastertrol minizone 2 ... not at the original thermostat.

beenthere 08-21-2010 03:30 AM

While a new stat may require the common to be connected when an older stat didn't.
It still sounds strange that the other wire now needs connected also.

kostia 08-21-2010 09:01 AM

I am actually starting to think that maybe the demper is where the problem is at and not the thermostat, given that everything seems to be working correctly other than the demper for MB. Will try to test it to see if a signal from the controller is getting there.

kostia 08-22-2010 09:57 AM

Demper was the problem wiring of the thermostat was correct using color coding. Thanks for the help.

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