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medium and high stages (2 stages of heat). HIGH will only run the high
stage of furnace heat.
NOTE: Two-stage furnace has LOW and HIGH selections only.
• Stages: System, Low, Low-Med, Med, Med-High, or High. Default =
System
6.3.3.4. Furnace Airflow Limits (modulating furnace
only)
The following settings allow the installer to restrict the furnace within
certain minimum and maximum airflows. These airflows are converted
to capacities. The Min and Max limits are determined by the equipment
size. These settings are not the same as the zoning airflow limits.
• Min. modulating limits: Minimum CFM to run a modulating furnace.
This will increase the minimum operating capacity of the furnace.
Default value is the furnace air flow for the lowest heat capacity.
• Max. modulating limits: Maximum CFM to run a modulating
furnace. This will increase the maximum operating capacity of the
furnace. Default value is the furnace air flow for the highest heat
capacity
6.3.3.5. Furnace Off Delay
This option denotes the amount of time the blower will continue to run
after heating has shut off. After the selection is made, touch SAVE.
• Furnace Off Delay: 90, 120, 150 or 180 seconds. Default = 120
seconds
6.3.3.6. Altitude
For gas de-rating, this setting will adjust the furnace's airflow to
compensate for altitude. Altitude adjustment is not available with older
furnaces. Please see furnace instructions for further details. After the
selection is made, touch SAVE.
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