Siemens QAA73.210 User Manual page 22

Note
Summer / winter
changeover
temperature (SUWI)
Note
22 / 36
Siemens
Building Technologies
The programmed heating curve is based on a room setpoint of 20°C. If the room
setpoint is adjusted, the heating curve automatically adapts to the new value.
The summer / winter changeover temperature is the criterion for automatic summer
/ winter changeover of the heating plant.
It offers the following benefits:
· Fully automatic operation throughout the year
· The heating will not be switched on when the outside temperature drops for
short periods of time
· Additional savings function
By changing the setting, the respective periods of time will be shortened or
extended. The change will only affect the heating circuit.
Increase: Winter operation will start earlier
Summer operation will start later .
Decrease: Winter operation will start later
Summer operation will start earlier
To determine changeover, the setting of the summer / winter changeover
temperature
( ± a fixed switching differential) is compared with the attenuated outside
temperature.
Heating OFF (from winter to summer)
Heating ON (from summer to winter)
This function only acts in automatic mode.
Room Unit for Boiler Control
Description of room unit settings
Taged > SuWi +1 °C
Taged < SuWi -1 °C
CE1U2283en
2015-09-16