Honeywell Prestige YTHX9421R5085WW/U Mode D'emploi page 24

Remote setback (commercial use)
During Occupied program periods, an occupancy sensor directs the thermostat to go
to REMOTE SETBACK settings when the room is empty. If someone is in the room,
it uses the Occupied program period settings. The thermostat ignores the occupancy
sensor during Unoccupied program periods.
If the thermostat is set up to be non-programmable, the sensor directs the thermostat
to go to REMOTE SETBACK settings when the room is empty. If someone is in the
room, then it follows the settings set by the user.
Depending on how your thermostat was installed, it may delay for up to 30 minutes
before switching to REMOTE SETBACK settings. This delay allows the room to stay
comfortable if the room is unoccupied for only a short time.
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