ION SYST0101CW Installation Instructions Manual page 17

5.10. Airflow Verification Check
NOTE: This feature is only available with specific ICP communicating indoor units. See the
Ion System Control Product Data for compatible units and more information.
The airflow verification check screen will appear next, as the system performs this operation.
This process will take about 1-1/2 minutes to complete. When completed, a screen will appear
displaying the results of the check.
If the system has an indoor unit equipped with a previous-version CFM-controlled blower
system the screen will display the static pressure (in inches of water) across the equipment at the
expected highest delivered airflow. If the blower RPM is greater than 1200, a warning will
appear, but equipment operation and the dirty filter detection operation will not be affected.
Press NEXT when the airflow verification check is complete.
If the system has an indoor unit equipped with an updated-version CFM-controlled blower
system, the screen will display the static pressure (in inches) across the equipment at a
pre-determined target airflow CFM. If the achieved (actual) CFM is unacceptably below the
target CFM, a yellow notice will appear to invite the user to see the associated information
screen; equipment operation and the 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.
5.11. Duct Assessment (zoned systems only)
NOTE: This feature is only available with specific ICP communicating indoor units. See the
Ion System Control Product Data for compatible units and more information.
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.
17