ISY Thermostat Question - Changing setpoints in ISY to Celsius rather than fahrenheit

[calberrt]

Hi Guys,

 

Took the leap into controlling a thermostat with the ISY and have my daily programs and fan programs running perfectly.

 

However as I live in Canada, I was wondering though if there is a way to set the ISY to show heat and cool set points to Celsius rather than Fahrenheit.  This would then match my settings in mobillinc.

 

Thanks in advance guys

 

calberrt

[stusviews]

The ISY does not offer that option. You'll have to change from ºF to ºC manually. The Owner's Manual has instructions.

[calberrt]

Thanks Stusviews,

 

I figured out the thermostat option as it now shows in celsius but was wondering if we can change the setpoints in the ISY to be celsius as well.

 

for example, in the ISY, my current heating set point is 72 degrees fahrenheit.  I was wondering if we can change it to show 22 degrees celsius.  I guess the answer is no?

 

It's awkward as when i view the thermostat in mobillinc, it shows the current temp as reported on the thermostat (in Celsius) but the set point from the ISY (in Fahrenheit)

[stusviews]

I just tried it and although the display indicated Celsius, the ISY did not. Perhaps in version 5?

[Michel Kohanim]

Hi stusviews,

 

ISY reports exactly what the thermostat reports divided by two. This is for INSTEON thermostats only.

 

Did you query the thermostat?

 

With kind regards,

Michel

[stusviews]

That worked

[Jaa6921]

I'm a Home Seer convert and have an extensive array of Insteon - 24+ dimmers, 2 PIR, a door sensor and a Venstar and Insteon adapter. So far I love it and it makes life easier especially with the remote access via Mobilinc.

 

I've also just "jumped in" with ISY thermostat control.

 

I have a Venstar 1800 and Insteon adapter, and have been sending very simple commands so far based on a time setting and then a mode and set point

 

Typically

 

If ...

time is between  XX.XXam and YY.YYpm (or a fixed time) - or - if State Variable = ZZ

 

Then...

Set Mode Heat

Set Heatpoint 70deg

 

else….

 

And then the Same for cooling cycle. 

 

Now I have ventured into the "Auto" mode on the T'stat and am having a few glitches. Its probably simple, but I need some help to debug….. please

 

At the end of the day I set a time to activate a night cooling 

 

Then

Set Mode Auto

Set Coolpoint 68

Set Heatpoint 64

 

In the morning I have this statement in a another timed program for the daytime period

 

Then

Set Mode Auto

Set Heatpoint 72

Set Coolpoiint 76

 

The logic here is that at night we like to be cool, but not too cool and during the day we like to be warm but the sun sometimes takes the ambient over a comfortable level.

 

Here is the problem.

 

When the system switches over to the day time mode from night time, and if the system was running and in heat mode,  then the thermostat displays a heat point of 66 degrees and a cool point of 76 instead of the expected 72 heat and 76 cool

 

I checked the event log and it reports ISY sending Heat at 132 to the stat even though the program list sates it should be 72(144) but the cool point is correct at 76 (152)

 

I've experimented inserting "wait" statements to see if the commands are going out too fast, and its made no difference. The event is repeatable but accept that I'm overlooking something obvious here

 

I will add that Iam using Mobilincon my iPhone and am polling the thermostat status using the thermostat screen and can adjust the set points OK from that utility

 

I am running 4.2.18

 

Thanks in advance for help with this. I hope I explained my problem well enough

 

John A

jaa6921

[stusviews]

Try

 

Then

Set Mode Off

Wait x seconds (or minutes)

Set Mode Auto

Set Heatpoint 72

Set Coolpoiint 76

[larryllix]

Thanks Stusviews,

 

I figured out the thermostat option as it now shows in celsius but was wondering if we can change the setpoints in the ISY to be celsius as well.

 

for example, in the ISY, my current heating set point is 72 degrees fahrenheit.  I was wondering if we can change it to show 22 degrees celsius.  I guess the answer is no?

 

It's awkward as when i view the thermostat in mobillinc, it shows the current temp as reported on the thermostat (in Celsius) but the set point from the ISY (in Fahrenheit)

I have been thinking of converting to all C temps as I have a mix now but for heating purposes don't you lose the temperature resolution using half degrees C instead of half degrees F?

 

eg: My home thermostat system is using C and is settable to a half degree. At certain times of the day, I find 22.5° C too warm,  but 22.0° C too cold.  Using F scales I can get 9/5 of the settable C° resolution.