How does the main output cycle work for the Sinopé
low voltage thermostats?

The Sinopé low voltage thermostats (TH1400ZB, TH1400WF, and TH1400RF) are not deadband thermostats that start the heating when the temperature goes below the setpoint and stop it when it is above. Instead, they are proportional thermostats that estimate the power needed to keep the temperature as close to the setpoint as possible for the upcoming cycle. Thermostats may start heating even if the temperature is above the setpoint, because they calculate that if they don’t, the temperature will drop too low during the next cycle.