112
Operation of Airside Economizer
An airside economizer (often called Free Cooling) takes advantage of cooler outside air
to minimize the use of fluid and/or mechanical cooling. This translates into energy
savings and lower operating costs. Since outside air temperature is the largest
operating factor; the magnitude of savings is dependent on the climate zone where the
equipment is installed. (For more information, please see ASHRAE Std 90.1). The
airside economizer requires a damper that is controlled by a 0 to10 volt analog signal.
When the damper is
“Open” (at Max Damper %)
, mostly outside air is used.
Conversely, when the damper is
“Closed” (at Min Damper %)
, mostly inside air is
used.
WARNING:
There is no intent on the part of Data Aire, Inc. to define local codes and
statutes which may supersede common trade practices, nor do we assume
responsibility for their interpretation. Consult local building codes and the National
Electrical Code for special installation requirements.
Additional I/O required for airside economizer operation.
Inputs
Discharge air temperature sensor
Outside air temperature sensor (OAT)
Outside air humidity sensor (OAH) (If using an Enthalpy mode)
Outputs
Outside Air Damper that uses a 0-10v analog signal.
Important Notice
Adding an Air-Side Economizer to a unit that was not originally supplied from the
factory will require an activation code to enable this feature. Please contact the
Data Aire service department to obtain an activation code and guidance installing
the additional I/O required for use with the Air-Side Economizer.
Summary of Contents for dap4 touch
Page 1: ...1 dap4 User Manual Data Aire Inc 230 W BlueRidge Avenue Orange CA 92865 www dataaire com...
Page 33: ...32 MENU F INFORMATION differently from what is written in this manual...
Page 69: ...66 MENU K ALARMS LIMITS Service Level continued Control Only...
Page 82: ...78...
Page 133: ...129 Wiring Connections...
