Ask Experts Questions for FREE Help !
Ask
    yozh's Avatar
    yozh Posts: 10, Reputation: 1
    New Member
    		  
    #1

    Jul 19, 2013, 12:15 PM
    2nd Zone with 1 Unit Thermostat connection
    Hello,

    We had our HVAC system installed by people that are no longer available for comment, yes I did get a bad deal and trying to fix it now.

    So basically right now there are 2 Zones from 1 unit. The 1st (main) zone has the stat on it and seems to be working and actually on the 2nd zone a feel a bit of air coming from the vents but it`s very little. The 2nd zone has 3 wires with out the stat connected to it right now. This brings me to my question.

    The 3 wires are Red, White and Blue. I tried red and White since there is no Blue terminal and I get nothing... The stat does not power on(nothing on the screen no power at all). I also tried with a battery Stat, but it does bring more air in. Not sure what else do to. If anyone can help it would be great !
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #2

    Jul 19, 2013, 03:37 PM
    Open the damper manually
    yozh's Avatar
    yozh Posts: 10, Reputation: 1
    New Member
    		  
    #3

    Jul 19, 2013, 03:44 PM
    I would like to use a thermostat there, that's the whole point... I`m just not understanding how to connect it to make it work...
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #4

    Jul 19, 2013, 03:56 PM
    If it is a 3 wire it must have a common wire then a power open and a power close. How is the one for down stairs wired??
    yozh's Avatar
    yozh Posts: 10, Reputation: 1
    New Member
    		  
    #5

    Jul 19, 2013, 04:07 PM
    I have to take a look. But there are at least 5 wires down stairs. I think the white wire is common does that make sense ? Based on my reading the Red should be power ? I have few different stats I can try most are honeywell... Should I take a look at the Damper how its wired ? Would Blue usually go to Y ? This is bad I wish they would have finished the job at least up to this point... They were also supposed to install a fresh air exchange which I have no idea what it looks like or what to look for...
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #6

    Jul 19, 2013, 05:19 PM
    Some dampers are normally open, some normally closed. If you have no voltage you need to see if the control board is sending a signal. Since 1 is working, I would guess you have a wire disconnect. Some dampers only need a 2 wire, the power opens the damper and a spring closes or vice versa.
    yozh's Avatar
    yozh Posts: 10, Reputation: 1
    New Member
    		  
    #7

    Jul 19, 2013, 05:27 PM
    But I might be putting in the wrong lead ? Are you saying the damper doesn't have power ?

    What I think I need to understand where does the second stat gets power from? Is it the dampers transformer ? I guess I have to go up to the attic and see where where are the wires coming from...

    The issue is I`m not even living in the house now and trying to get in here... If we have to move now its so hot its just crazy...
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #8

    Jul 19, 2013, 06:36 PM
    The t-stat goes to a main control board not the damper. Is the main control even wired for 2 dampers? take of cover and see how many sets of wires are in there.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #9

    Jul 19, 2013, 06:39 PM
    do you have 3 dampers? You should have a zone 1 damper, a zone 2 damper. And a bypass damper from the supply to the return in the basement. A fresh air intake should be a box about 2x2 with 3 ducts going into it. Or it could be just a small pipe taken to the outside if it was done the cheep way
    yozh's Avatar
    yozh Posts: 10, Reputation: 1
    New Member
    		  
    #10

    Jul 19, 2013, 06:41 PM
    So is the unit that flips the damper ? Why is the T-Stat only has 3 wires (second t-stat for subzone) ?
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #11

    Jul 19, 2013, 06:49 PM
    What brand damper system is it?
    yozh's Avatar
    yozh Posts: 10, Reputation: 1
    New Member
    		  
    #12

    Jul 19, 2013, 06:50 PM
    Quote Originally Posted by Joshdta View Post
    do you have 3 dampers? You should have a zone 1 damper, a zone 2 damper. and a bypass damper from the supply to the return in the basement. a fresh air intake should be a box about 2x2 with 3 ducts going into it. Or it could be just a small pipe taken to the outside if it was done the cheep way
    I`ll check in the attic. What I saw in the basement is a big intake that is sucking the air from outside in which is joined by the return ducts in the back of the unit.

    This is for my other zone. So I guess to make it clear I have 3 zones. 2 Units.

    1st Zone is for first floor and basement, all separate units. T-Stat works, cold air seems to be good. I did not test the forced hot air yet.

    2nd Zone is the second floor separate units in the attic T-Stat works

    3rd Zone is shared from the second zone from the attic and is 3rd floor. No T-Stat installed just 3 wires Blue, Red and White


    All zones were supposed to have fresh air exchange.
    yozh's Avatar
    yozh Posts: 10, Reputation: 1
    New Member
    		  
    #13

    Jul 19, 2013, 06:52 PM
    Quote Originally Posted by Joshdta View Post
    what brand damper system is it??
    I have to climb in the attic and check. I guess I`ll get all this info tomorrow. As I said we could not move in yet. So I have to go by the house and write all this info down, trace the wires etc...
    yozh's Avatar
    yozh Posts: 10, Reputation: 1
    New Member
    		  
    #14

    Jul 21, 2013, 08:06 PM
    I checked today could not find the actual damper, what is it supposed to look like ? I think after playing with the leads with battery powered t-stat I think the air is moving better now, but still no control from the 3rd zone t-stat. I guess I have to bite the bullet and call new repair men and hope that warranty will stay on the units when and/if this guys are able to fix it.
    yozh's Avatar
    yozh Posts: 10, Reputation: 1
    New Member
    		  
    #15

    Jul 25, 2013, 06:58 AM
    So today I looked and I see the 3rd zone wires are NOT connected. So does that mean a damper is not installed ? Also found another HUGE issue. There is a water build up, and I mean a lot of water in the duck insulation where the duct starts from the unit... It was so much water that I have to redo the sealing below. And I don't understand where the water is coming from condensation ?
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #16

    Jul 25, 2013, 09:11 AM
    Could be, or if dampers not working, or no bypass damper was installed unit may be freezing up
    yozh's Avatar
    yozh Posts: 10, Reputation: 1
    New Member
    		  
    #17

    Jul 25, 2013, 10:22 AM
    Seems only on that space right when the duct starts... I don't think I can get away with out calling people in... Thanks for the help guys...
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Dual zone with one AC unit? [ 3 Answers ]

I have a two story house in Arizona. I have one unit for downstairs and one unit for upstairs. The unit upstairs has one thermostat to control all 4 rooms. The thermostat is located in common area where there is no duct but has 3 returns. This area is usually hotter than rooms. When I set the temp...

Setting Thermostats for Dual Zone When 2nd Floor Unoccupied? [ 1 Answers ]

We have a two story house approx 3,200 Sqft, dual zone heat/AC and programmable thermostats. Our bedroom is on the first floor, and we have a large great room with a 2 story ceiling. With the kids having moved out, we don't want to spend more for heating the house than necessary. We don't need...

2 zone oil heat, 2nd zone runs 1st zone [ 1 Answers ]

Hi, We have a 2 zone oil burner. The 1st zone (upstairs) runs separately and works no problem. The 2nd zone(basment), when we try to run 2nd zone separately , it seems to run zone 1(upstairs) and the baseboard heating upstairs gets hot and heats zone 1 even thought we have the t-stat set low...

IP connection on 2nd computer [ 7 Answers ]

Hi anybody, Missmarple here. I need help. Two computers in my home. This computer is working fine but the laptop will not come on. It says IP connection. I'm on Broadband How would I check my own computer (this one) to see what my IP is?

Wiring a 2nd zone [ 1 Answers ]

Central a/c is all set up on my finished basement as a 2nd zone. In the upstairs hall closet, I can see a large round pipe running down from the attic to the basement. Ceiling ductwork and vents in the basement are all connected to it. There is a programmable thermostat in the basement as well. The...

View more questions Search