Amana TSTATA4271GT Owner's Manual page 44

Main Menu Buttons -
Installation Settings
Free Cooling
Free Cooling is an energy saving way to boost the efficiency of your air
conditioning system by bringing in cool air from the outside. The installation
of a Free Cooling damper(s) and outdoor temperature sensor is required.
Free Cooling - DISABLED
Free Cooling - ENABLED
Turns on Free Cooling.
Usable Outdoor Temp
Free Cooling shuts off above this outdoor temperature. (40 - 80 degrees F)
Mechanical Cooling? - NO
Mechanical Cooling? - YES
If you don't have a compressor, set Mechanical Cooling to "NO" , Y1 will
then be used to control the Free Cooling Damper(s) and Y2 will be disabled.
If set to "YES" , mechanical (compressor) cooling will be controlled by the
Y2 terminal. (See page 52 for wiring diagram)
Mechanical air conditioning is turned on with a 2nd stage demand for cooling
and the Free Cooling, outdoor air damper is closed.
Supply Grilles
Return Grille
AirFlow
Settings
(65˚)
Free Cooling
AirFlow
HVAC Unit
Supply
Coil Furnace
Plenum
AirFlow
Barometric
Return Air Grill
Filter
Vent to Attic
Barometric
AirFlow
Damper
(To relieve building pressure)
37
(Continued)
Outdoor Air Grille
Outdoor
Damper
AirGrill
Damper1
Open
Return
Plenum
Damper2
Closed
Air
Return
Damper
Free Cooling