Missing thermostat on basement zone valve in 1966 condo

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  #1  
Old 10-20-20, 12:39 PM
G
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Question Missing thermostat on basement zone valve in 1966 condo

Hello DIY community!

We are trying to address the heating issue that has come up in our condo with a basement. I recently updated the main thermostat in the living room and realized that it does not control the basement heating levels - and then found out that we have 2 zone heat. The HOA maintenance guy informed me that he thinks the second thermostat is hidden behind the walls. Here is the visible portion of the unfinished basement section with 2 zone valves and a junction box which has the wires.
https://imgur.com/a/HYBK5rU

v
How do I find the second thermostat in the walls or since I'd rather not burn down the house do I hire a professional to wire both valves to the same thermostat on the main living room thermostat?

The one we have is : LUX ELV4 Line Voltage Programmable Thermostat
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

 

Last edited by PJmax; 10-20-20 at 06:46 PM. Reason: added pic from link
  #2  
Old 10-20-20, 01:44 PM
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G,
It looks like the ZV with the greenfield connected to it is your line voltage one connected toi your stat although I don't know why you would have line voltage. The other ZV looks like it has 24V wires coming from it but that is another issue.

If you look at your ZV withe the greenfield you can see a lever probably marked auto & manual. If your other stat or the stat that controls the basement has the same lever, move the lever to manual and when your stat calls for heat water will get delivered to both zones at once and when the stat is satisfied both zones will stop producing heat. By having the second ZV constantly open it will react to the stat sor the operating ZV. and no additional wiring is needed unless you wantt them to work independently.

Hope this helps a little.
 
  #3  
Old 10-20-20, 06:47 PM
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@ spott...... do they make line voltage zone valves ?
Strange setup there.
 
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Old 10-21-20, 06:39 AM
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Hi, remove the cover of that “J” box and take a pic so we can see what’s in there.
120VAC valves are out there, never saw one.
https://estore.industrialcontrolsonl...ode=V4043A1002

Geo🇺🇸
 
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Old 10-21-20, 01:06 PM
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Old 10-21-20, 01:25 PM
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They both look identical in the picture. One has a jacket and the other doesn't.
It looks like the black wires go into the high voltage box.
They may both be hooked up.
 
 

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