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Setpoints
The Stand-By setpoints are under the same limitations
and restrictions as the Occupied and Unoccupied
setpoints. Stand-By setpoints reside between the
corresponding Occupied and Unoccupied setpoint
values.
Unocc Heat
= 65°F
Hotel and lodging applications can benefit from the
addition of an entry door switch wired to one of the
binary inputs of the thermostat controller. When a door
contact is used and configured, the Stand-By timer and
its configuration are no longer active or used. The
occupancy toggle between Occupied and Stand-By is
then dictated by both the door contact and the
PIR sensing device used. If movements are detected
by the PIR sensor and the door is closed, the room is
considered occupied. The thermostat controller
switches back to Stand-By mode only if the door switch
toggles open/closed. Motion is ignored when the door
switch indicates an open door.
Figure 12: Unoccupied Timer Set to 6 Hours and Stand-By Timer Set to 2 Hours
T60xDFH-4 and T60xDFH-4+PIR Series Thermostat Controllers with Dehumidification and Occupancy
Sensing Capability Installation Instructions
St-By Heat
Occ Heat
= 69°F
= 72°F
Room Temperature
Figure 11: Increasing Room Temperature Setpoints
The installer must be certain that the difference
between the Stand-By and Occupied values can be
recovered within a timely fashion to ensure occupancy
comfort. In addition, the difference between the two
values must be large enough to warrant maximum
energy savings.
Occ Cool
St-By Cool
= 75°F
= 78°F
PIR occupancy functionality is dictated by both the
Stand-By timer and Unoccupied timer configuration
value and movements present in the area.
Unoccupied Timer Disable
It might be preferable for the local area to stay out of
Unoccupied mode and always stay at the Stand-By
occupancy level when no activity is present. In
instances when areas always need to be on Stand-By
status, ready to respond to demand at any given point
in time, we recommend disabling the Unoccupied
timer. When the local PIR occupancy routine is running
at the thermostat controller, the zone drifts into
Unoccupied mode when the Unoccupied timer is set
above its factory default value of 0.0 hours.
9
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