Duct Assessment (Zoned Systems Only) - Carrier Infinity SYSTXCCWIC01-B Installation Instructions Manual

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 Infinity System Control detects an error (damper not moving or damper wired
backwards), it will perform the duct assessment again. If it still detects a damper
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