Honeywell TH8321 Product Data page 14

VISIONPRO® 8000 SMART THERMOSTAT
ISU Installer Setup
Number Name
None
222 A-L/A Terminal
Time Of Day
Economizer
Heat Pump Fault
Econ. Fault input
Economizer fault
222 A-L/A terminal
Manual
300 System Changeover
Automatic
33-00096—04
Table 2. Installer Setup (ISU) Table. (Continued)
Settings Default
None
or
Econ. Fault input
Manual:
if ISU 101 is
Residential
Automatic:
if ISU 101 is
Commercial
Residential,
Commercial
or Both
Commercial This ISU is only displayed when ISU 101 Application
is Commercial.
Note: When the thermostat is setup for Residential,
the L/A terminal operates as described under "Heat
Pump Fault". The L/A terminal requires no setup for
residential applications.
None: The A-L/A terminal is not used.
Time of Day: The A-L/A terminal is energized during
Occupied periods and when the user overrides the
temperature. The terminal is de-energized during
Unoccupied periods and in Standby mode.
Economizer: The thermostat controls an economizer
module to provide ventilation during Occupied
periods and free cooling when outdoor conditions
are favorable. The
A-L/A terminal is energized during Occupied periods
and during a call for cooling in Unoccupied periods.
See "Economizer and Time of Day (TOD) Operation"
beginning on page 80.
Notes: The economizer module determines when
outdoor conditions are favorable for free cooling.
Heat Pump Fault: When 24 volts is detected on the
L/A terminal (compressor monitor), the thermostat
displays a message to alert the user when the heat
pump requires service. The L/A terminal sends a
continuous output to a zone panel when the
thermostat is set to Emergency Heat mode. The zone
panel will not turn on the heat pump when a zone is
set to Emergency Heat mode.
Econ. Fault input: Only shown if "Economizer fault
FDD" is set to "yes". Not adjustable.
Commercial This ISU is only shown when the "Economizer fault
FDD" is set to "yes". It is set for "economizer fault"
and is not adjustable. It is meant to inform the
installer that the A-L/A terminal needs to be wired to
the economizer as shown in Fig. 229 on page 87.
Both Manual: The user must select heating or cooling as
needed to maintain the desired indoor temperature.
Automatic: The user has the option to select Auto for
the system setting. In Auto mode, the thermostat
controls heating and cooling equipment as needed
to maintain the desired indoor temperature.
14
Notes