Something I learned today
My HVAC contractor came by and we were discussing my Thermostat.
We tried setting the Thermostat mode in OH web UI to “Economy Heat”
That set the Thermostat display to
- Period Away
- Cool setpoint to the value configured in the thermostat for AWAY
- Heat setpoint to the value configured in the thermostat for AWAY
- Mode to Heat
- Auto changeover set to not enabled
We tried setting the Thermostat mode in OH web UI to “Economy Cool”
That set the Thermostat display to
- Period Away
- Cool setpoint to the value configured in the thermostat for AWAY
- Heat setpoint to the value configured in the thermostat for AWAY
- Mode to Cool
- Auto changeover set to not enabled
We tried setting the Thermostat mode in OH web UI to “Auto”
That set the Thermostat display to
- Period Home (This is during the configured HOME period)
- Cool setpoint to the value configured in the thermostat for HOME
- Heat setpoint to the value configured in the thermostat for HOME
- Mode was not changed from the previous value
- Auto changeover set to enabled
My HVAC contractor opined that this is in line on how the commercial Honeywell systems work. According to him, the commercial systems presence setup do not have upper/lower setpoints with auto changeover for when occupancy is configured for empty. There is either HEAT or Cool mode and the setpoint for that mode.
I did not like that answer but it matched the observed behavior.