In 2-pipe applications, the thermostat controls a valve in heating/cooling mode with changeover (automatically or manually), heating only, or cooling only (factory setting, P02 = 1).
On/Off control
Control sequence
On/Off control output
The diagrams below show the control sequence for On/Off control.
Heating mode | Cooling mode |
T[°C] Room temperature | SDH Switching differential "Heating" |
w Room temperature setpoint | SDC Switching differential "Cooling" |
YHC Control command "Valve" |
|