Which takes control Wireless or Timer

[graham1]

I am using weather compensation.  Heating timing is set on the schedule timer.  Which controls the temperature the wireless thermostat or the temperature on the scheduler?

[PhilT]

25 minutes ago, graham1 said:

I am using weather compensation.  Heating timing is set on the schedule timer.  Which controls the temperature the wireless thermostat or the temperature on the scheduler?

Both! You set the scheduler target and your wireless thermostat tells the controller when that target has been reached. However some systems are designed with one degree of "headroom", so if, for example, the scheduler target is 20, the wireless/controller will cut off heating at 21, then turn on again when it drops back to 20

Edited November 2, 2023 by PhilT

[ReedRichards]

If you are using pure Weather Compensation then the ASHP will be on when the scheduler is on but the room temperature has not reached the temperature set on the thermostat.  "On" might include cycling under some circumstances, such as mild weather.  This happens when the ASHP cannot operate at a low enough power output to remain on continuously.