Honeywell Prestige 2.0 THX9421 Manual page 29

ISU Installer Setup
Number Name
None
2220 A-L/A Terminal
Setup Time Of Day
Economizer
Heat Pump Failure Indication
Manual
3000 Changeover
Automatic
THX9321 PRESTIGE
Table 4. Installer Setup (ISU) Table. (Continued)
Settings Default
None
Manual:
if ISU 1010 is
Residential
Automatic:
if ISU 1010 is
Commercial
29
®
2.0 AND THX9421 PRESTIGE
Residential,
Commercial Requires
or Both EIM
Commercial No This ISU is only displayed when ISU 1010
Application is Commercial.
Note: When the thermostat is setup for
Residential, the L/A terminal operates as
described under "Heat Pump Failure
Indication." 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 128.
Notes: The economizer module determines
when outdoor conditions are favorable for free
cooling. Delta T Diagnostics is not available
when the thermostat is setup for an
Economizer. If an economizer fault alert is
required, see Fig. 355 on page 156.
Heat Pump Failure Indication: 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.
Both No 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.
®
IAQ WITH EIM
Notes
68-0311—07