ION SYST0101CW Installation Instructions Manual page 26

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6.3.3.3. Furnace Staging

This option controls the staging of the furnace and selects the minimum amount of time low

stage must operate before high stage is activated. SYSTEM setting will allow the Ion Zone

Control to determine furnace staging. LOW will only run the low stage of furnace heat. HIGH

will only run the high stage of furnace heat.

NOTE: Two-stage furnace has LOW and HIGH selections only.

• Stages: System, Low 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.

• Altitude: 0000 – 2000, US 2001 – 3000, CN 2100 – 4500, US 3001 – 4000, US 4001 – 5000,

US 5001 6000, US 6001 – 7000, US 7001 – 8000, US 8001 – 9000, and US > 9000. Default

= US 2001-3000

• Static Pressure selection: 0 to 10,000 ft. This value is used to correct the static pressure

readings the system performs.

6.3.3.7. Furnace Dehumidifier Drain

This option selects the time the continuous fan turns off at the end of cooling in order to drain

the indoor coil of water. The fan will only be turned off if a dehumidify demand existed at the

start of or during the cooling cycle.

• Dehumidify Drain Time: Adjustable from 5 to 60 minutes. Default = 15 minutes