Pre-Occupancy Purge; Wired Indoor Sensors; Temperature Control - Honeywell TH8321 Product Data

Time of Day (TOD)
The thermostat can be set up for a Time of Day output in
the installer setup. This output is commonly used to control
lighting panels, turning them on for occupied periods and
off for unoccupied periods. Table 6 explains how the TOD
feature works with various thermostat modes.
Table 6. TOD Operation.
Thermostat Mode
Occupied
Occupied temporarily
Temperature overrides
Unoccupied
Unoccupied temporarily
Standby
Non-programmable
* If ISU 222 "Economizer fault FDD" is set to "no" then the A-
L/A is used for TOD control. If ISU 222 "Economizer fault
FDD" is set to "yes" then the U1 contacts are used for TOD
control.
The Economizer Module and Time of Day output connect
to the A-L/A terminal at the thermostat and are set up at
ISU 222.
Fig. 218.

Pre-Occupancy Purge

The thermostat can be set up for Pre-Occupancy Purge in
the installer setup (ISU 401). When setup for Pre-
Occupancy Purge, the thermostat runs the fan 1 to 3 hours
before each occupied period to provide a comfortable
workplace upon arrival. Options are Off and 1 to 3 hours.
A-L/A Terminal or U
Contacts. *
A-L/A energized or U
contacts closed. *
A-L/A NOT energized or U
contacts open. *
VISIONPRO® 8000 SMART THERMOSTAT

WIRED INDOOR SENSORS

For wiring, see "Wiring guide — Wired Indoor Sensors" on
page 89.
Indoor Sensor Operation

Temperature Control

The thermostat can be set to respond to its internal
temperature sensor, or to an optional wired indoor sensor.
If multiple sensors are used, the thermostat will average
the temperature detected at each sensor.
In Fig. 220, both the thermostat internal sensor and wired
indoor sensor are being used for Temperature Control and
are being averaged since both sensors are set to "Yes."
Select "No" if you do NOT want a specific sensor to be used
for temperature control or be part of the temperature
average.
81
Fig. 219.
Fig. 220.
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