Table of Contents
Advertisement
Main Menu Buttons -
Installation Settings
Free Cooling
Free Cooling requires additional dampers and duct work to be installed. Additionally,
the thermostat is wired in a different manner for this feature to function properly.
Before enabling this feature, please make sure these steps are completed.
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 67 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
( 65˚)
Free Cooling
AirFlow
HVAC Unit
Supply
Coil
Furnace
Plenum
AirFlow
Return Air Grill
Barometric
Filter
Vent to Attic
Barometric
AirFlow
Damper
(To relieve building pressure)
56
Settings
(Continued)
Outdoor Air Grille
Outdoor
Damper
AirGrill
Damper1
Open
Return
Plenum
Damper2
Closed
Air
Return
Damper
Free Cooling
Advertisement
Table of Contents
