Cycle Monitoring With Honeywell YTH8320ZW1007

Other Devices & Integrations Climate Control & Temperature Sensors
1

With an eye toward monitoring my air conditioner I’d like to log its on/off cycles, possibly with something like the datamine logger.

I would like to know if the Honeywell YTH8320ZW1007 Z-Wave Thermostat reports to Vera each time it cycles on or off, or if it must be polled to determine its current state.

If it must be polled, I will probably not choose it. In which case the question changes to; is there a better option than a Door/Window sensor attached to a relay to tell Vera when the air handler goes on and off?

2

Looks like the Honeywell YTH8320ZW1007 supports sending status via Z-Wave to the vera.

http://www.pepper1.net/zwavedb/uploads/resources/8c19b761d08ffd736ab943c72280e6f6d6d361bc.pdf

Middle of page 13.

Thermostat Operating State
The thermostat can send the message containing the actual state of the HVAC equipment
based on equipment state change.
The thermostat provides the following operating states:
? Idle - no equipment on
? Heating - heating equipment on
? Cooling - cooling equipment on
? Pending Heat - minimum off time applied to protect the heat pump compressor
? Pending Cool - minimum off time applied to protect the heat pump compressor

I am able to do this with the Trane Thermostat that I have. (See attached screenshot)

3

Thank you, @FireBird. Page 13, how could I have missed that? :wink:

This is what I wanted to know and your application is exactly what I want to do.

4

No problem glad to help. I have my Trane set with a 2 degree “Deadband” or delta so if it’s set to 75 F it doesn’t start cooling until it reaches 77 F and doesn’t shut back off until 75 F. By default it’s set to a 1 degree delta and I found it would cycle the A/C on and off too much. Not sure if the Honeywell is set that way or not, might be something to check. I only wish I could easily export the datamine data to a CSV.

5

Yes, you can set the Honeywell thermostat to have a delta as well.

6

Datamine already stores the values in a CSV file. Look in /dataMine. You can pick it up via SCP, SFTP, or WinSCP.

See the Under The Hood section of the Datamine documenation.

7

Ya I tried to use the CSV from datamine, but it’s a pain. Unix timestamp that you can convert in Excel, the real problem is it creates multiple CSV file for each datapoint. Or maybe there is something wrong with my datamine have you been able to use the CSV or txt that it creates?

8

I’ve used the raw file, the others are daily and daily max/min values. Unix time stamps were not a problem for me as I was using Linux anyway.

As you seem to already know Excel can convert the Unix time stamp with this formula:

=(((A1/60)/60)/24)+DATE(1970,1,1)+(-5/24)

A1 is the cell with the timestamp and the -5 at the end is a GMT offset for EDT.

9

Is there information somewhere on how to set the delta on the Honeywell?

10

You need to get the installer’s manual (I used Google), and go into the setup menu to do it.

On this model, there are 4 digit functions that correspond to a specific setting. You will need to look it up.

I don’t have the manual handy at the moment or the ability to actually dig for it right this second.

Sorry.