Controlling Thermostats

[markgam]

Can you control one Venstar Programmable Thermostat from another thermostat?

[Michel Kohanim]

Hi Mark,

 

There are two ways of doing this:

1. Use programs the conditions of which are the parameters for the first thermostat

2. If You are looking for Heat/Cool being called, you can use scenes. i.e. the first thermostat heat/cool calling as the controller and the other thermostat as a responder

 

With kind regards,

Michel

[markgam]

Michel,

Thanks I was sort of thinking it was as easy as that but I wasn't sure. We have two separate heating/cooling plants, one for the first and second floors and one for the third floor. It would be really nice not having to climb two flights of steps to adjust the thermostat.

 

Also can you program the thermostat individually and then have a program on the ISY override that programming?

[lawr1000]

When you add the Thermostat to the ISY you now get status update when the thermostat set points are changed manually. You can use programs to change them back.

 

I let my wife adjust the thermostat manually but after an hour I set them back with the ISY. My away program adjusts the cool set point up and heat set point down. A press of the Home button on one of several KPLs and the set points go back to normal.

[markgam]

Lawr1000,

That is exactly what I am looking to do, I also want to receive an email whenever the temp is changed from the preset values, this will enhanse every dad's sixth sense of knowing when the someone touches the thermostat especially when I am not home .

[lawr1000]

Here are my programs

 

This one checks the Cool SetPoint and when somebody sets it below 77 I start a timer for 1 hour then change both heat and cool setpoints back to normal. The Heat change program is just the opposite.

Thermostat Downstairs Cool Change
If
       Status  'Thermostat Downstairs' is not Mode Off
   And Status  'Thermostat Downstairs' < 77° (Cool Setpoint)

Then
       Wait  1 hour 
       Set 'Thermostat Downstairs' 69° (Heat Setpoint)
       Set 'Thermostat Downstairs' 77° (Cool Setpoint)

I also make sure the Mode is always automatic.

Thermostat Downstairs Mode Change
If
       Status  'Thermostat Downstairs' is not Mode Auto

Then
       Wait  1 minute
       Set 'Thermostat Downstairs' Mode Auto

I have two buttons on a KPL for Away and Home they are set for Non-Toggle Off. When the Away button is pressed the cool set point is set higher and the heat setpoint is set lower. This won't interfere with the Cool and Heat Change programs above.

Thermostat Downstairs Away
If
       Control 'Living Room Light (Door) - D' is switched Off
    Or Control 'Living Room Light (Door) - D' is switched Fast Off
    Or Control 'Living Room Light (Door) - D' is switched Fade Stop

Then
       Stop program 'Thermostat Downstairs Home'
       Wait  10 seconds
       Set 'Thermostat Downstairs' 66° (Heat Setpoint)
       Set 'Thermostat Downstairs' 79° (Cool Setpoint)

The Home Program Looks like this

Thermostat Downstairs Home
If
       Control 'Living Room Light (Door) - C' is switched Off
    Or Control 'Living Room Light (Door) - C' is switched Fast Off
    Or Control 'Living Room Light (Door) - C' is switched Fade Stop

Then
       Stop program 'Thermostat Downstairs Away'
       Wait  10 seconds
       Set 'Thermostat Downstairs' 68° (Heat Setpoint)
       Set 'Thermostat Downstairs' 77° (Cool Setpoint)

Hope these help.

[markgam]

These are great, thanks!!