Greenheck IG / IGX (464104 IOM) (Pre-2009) - Manual (Page 45)

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Start-Up - 4:1 Electronic Modulation
Step 9 Access the Inlet Air Sensor
Setting
From the program menu, use the up or down key to
navigate through the menu options until the display
reads “iAS.” Once the display reads “iAS,” press the
enter key. The display will change to the inlet air
sensor setting.
NOTE!
Steps 8 - 10 are provided for adjusting the inlet air set point. The inlet air sensor is preset to the
factory recommended 60ºF, only adjust if needed.
NOTE!
The inlet air sensor monitors the temperature of the inlet air. If the inlet air is above the sensor’s set
point, the inlet air sensor shuts off the furnace and continues to supply the warm outside air.
NOTE!
After modifying a setting, the enter key must be
pressed to save the change. If the enter key is
not pressed the display will return to the
program menu without saving the change.
NOTE!
The room override function requires a field supplied thermostat to be installed in the space and to be
wired between terminal 31 and 32 in the unit’s control center.
Step 10 Edit the Setting
Use the up or down keys to edit the inlet air setting.
When the correct setting is displayed, press the enter
key to save the setting and return to the program
menu.
NOTE!
Steps 11 - 12 are provided for adjusting the room override setting. Only adjust the setting if the room
override function is desired.
NOTE!
The room override function temporarily changes the discharge air temperature to the room override
setting if a room thermostat is not satisfied.
Step 11 Access the Room Override
Setting
From the program menu, use the up or down key to
navigate through the menu options until the display
reads “rot.” Once the display reads “rot,” press the
enter key. The display will change to the room
override setting.
Start-Up