Carrier bryant Evolution Connex Control SYSTXBBECC01-C Installation Instructions Manual page 26

dirty filter detection operation will not be affected. Press NEXT when the
airflow verification check is complete.
NOTE: The airflow verification check occurs at initial installation, or
when FULL INSTALLATION or AIRFLOW VERIFICATION
TEST are selected in the INSTALLATION & SERVICE menu.
5.12. Duct Assessment (zoned systems only)
The duct assessment screen will be displayed next for zoned systems.
Touch NEXT to start Duct Assessment. Duct Assessment will measure
the relative size of the ductwork, up to and through the dampers. These
measurements are used to control the correct amount of airflow in the
zoned system. Status messages will appear on the screen to indicate what
the system is doing. The process will take approximately two minutes per
zone. The duct assessment will override a call for heat or cool.
A duct assessment will automatically occur each day at a user selectable
time. The factory default time is 1:00 p.m. local time but, may be
changed by entering the Zoning Setup menu. If there is an active call for
heating or cooling, the system will wait until the call is satisfied before it
performs the duct assessment. The system will first open all zones and
drive the blower to 175 CFM/ton of cooling (or the minimum indoor
unit's airflow, whichever is greater). It will then take a static pressure
measurement. The system will then close all zones and open one zone at
a time, taking a static pressure measurement for each zone.
The system will then close all zones and take a pressure measurement,
getting a value for the duct leakage up to and through the dampers. With
these static pressure measurements, the system will calculate the relative
size of each zone as well as the percent leakage through the dampers at
the end of the process, the display will show the relative size of each zone
duct.
If the Evolution Connex Control detects an error (damper not moving or
damper wired backwards), it will perform the duct assessment again. If it
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