Wi-Fi Thermostat without C Wire

[WorthFlorida]

What model of white Roger's?

Thermostat Compatibility - 3-wire (RWG) White Rodgers 1311-102​

Or

3/4" Sweat Zone Valve (Two Wire) Brand: White Rodgers 1361-102​

or another model?

 

[Reicherb]

What model of white Roger's?

Thermostat Compatibility - 3-wire (RWG) White Rodgers 1311-102​

Or

3/4" Sweat Zone Valve (Two Wire) Brand: White Rodgers 1361-102​

or another model?

2 - 1311-103 (1")
1 - 1311-102 (3/4")

 

[Sponsor]

 

[WorthFlorida]

Currently what Brand of thermostat?

It's definitely three wire zone valve. 24v is applied to the W lead to open the valve, when the thermostat is satisfied it uses the Y lead to operate the zone valve to close.

Typical thermostats only apply power to the Y lead for cooling. White Roger's list compatible digital thermostats. None are wifi. You should call White Roger if they know of a compatible WiFi thermostat. As of now using a c-wire adapter won't work because of the Y lead.

https://www.copeland.com/documents/white-rodgers-product-catalog-en-us-1619412.pdf

 

[Reicherb]

Currently what Brand of thermostat?

It's definitely three wire zone valve. 24v is applied to the W lead to open the valve, when the thermostat is satisfied it uses the Y lead to operate the zone valve to close.

Typical thermostats only apply power to the Y lead for cooling. White Roger's list compatible digital thermostats. None are wifi. You should call White Roger if they know of a compatible WiFi thermostat. As of now using a c-wire adapter won't work because of the Y lead.

https://www.copeland.com/documents/white-rodgers-product-catalog-en-us-1619412.pdf

Thank you. I currently have battery powered Honeywell thermostats. I'm not spending much time at home and was thinking it would be great to set the temperature back when I was gone and be able to warm it back up before getting home. It's not a big need.

 

[WorthFlorida]

Thank you. I currently have battery powered Honeywell thermostats. I'm not spending much time at home and was thinking it would be great to set the temperature back when I was gone and be able to warm it back up before getting home. It's not a big need.

What Honeywell model. I want to look up its installation instructions. At the thermostat, please take picture of the wire connections.

 

[Reicherb]

What Honeywell model. I want to look up its installation instructions. At the thermostat, please take picture of the wire connections.

No idea. I'll look when I am next home.

 

[Bannerman]

Smart Thermostats that do not require a C wire

 

[Reicherb]

I was finally able to get pictures of my thermostats. They are Honeywell RTH7600D1030 thermostats.

Touchscreen 7-Day Programmable Thermostat | Honeywell Home

Use the Honeywell Home touchscreen programmable thermostat to set your ideal temperature settings so that you're comfortable at the time you expect. Shop now at HoneywellHome.com!

www.honeywellhome.com

 

[WorthFlorida]

Thanks for the update and pictures. I'm familiar with this series of Honeywell thermostats. If you can provide a picture of the wiring and the zone valves wires. Trying to figure out how the valves are closed or default to close with no power?

One solution but it can get expensive, three T9 thermostats with remote sensors. They say Honeywell but are supported and manufactured by Resideo. Mount them in the boiler room. Add the sensors on each floor and access through WiFi to override the scheduled program. You can have multiple sensors with each thermostat. One concern would be if the second floor remote sensor and communicate with its thermostat in the boiler room?

Meanwhile I'll keep looking for you. It's possible the y wire is not used. Why I like to see the wiring.

How is your kid doing?

 

[Fitter30]

Honeywell and Resideo who are they.

Resideo & Honeywell: What's the Difference?

jacksonsystems.com

 

[WorthFlorida]

Where to they go. Heat is usually R to W turns on the heat but Y might be used to power a valve close. Take a few pics of the boiler piping and if there's controls on the wall.

Fitter is right. Need a picture of the wiring at the thermostat. The yellow lead may go to the O/B terminal.

 

[Reicherb]

Here are pictures of the thermostat and zone valve wiring.

My son is doing well. He received a heart transplant on 12/22 and came home on 1/5. It's been a long journey but the end is in sight.

 

[WorthFlorida]

Just as I thought, the O lead is used to close the zone valve. So far it looks like you'll need a aux 24v transformer to power the WiFi thermostat or three T9 thermostats with a remote sensor for the 2nd and 3rd floors. T9 thermostat on Amazon are $147 with one remote sensor. Several remote sensors can be programmed on one thermostat and it uses an average temperature.

I need to read the T9 thermostat manual for the O lead. Most heat pumps the reversing valve is in the heat mode. 24v ac is applied to the O lead the operate the reversing valve for cooling. However, Trane units are the opposite.

Give me a few days on how the program for the O lead.

 

[Reicherb]

Just as I thought, the O lead is used to close the zone valve. So far it looks like you'll need a aux 24v transformer to power the WiFi thermostat or three T9 thermostats with a remote sensor for the 2nd and 3rd floors. T9 thermostat on Amazon are $147 with one remote sensor. Several remote sensors can be programmed on one thermostat and it uses an average temperature.

I need to read the T9 thermostat manual for the O lead. Most heat pumps the reversing valve is in the heat mode. 24v ac is applied to the O lead the operate the reversing valve for cooling. However, Trane units are the opposite.

Give me a few days on how the program for the O lead.

Thank you!