Trane OABE OADE OAKE OANE (Water Source Heat Pump) Katalog

OAU-PRC003A-EN

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The Horizon™ Outdoor Air Unit (OAU) is designed to efficiently dehumidify outdoor air. As such, 
the selection of an OAU is somewhat more complex than a standard recirculation rooftop. To make 
it easier, there is an online selection tool provided. Before launching the program, the following 
information about the specific project will be required:

1.

Entering Air Temperature (DB/WB)

a. Summer

b. Winter

2. Entering Water Temperature (EWT) Cooling

3. Fluid Flow

4. Fluid Type (Water, Propylene, or Ethylene)

5. Volume Glycol (if Propylene or Ethylene is used)

6. EAT—Heating

7.

EWT—Heating

8. Condenser Material (copper inner tubes are recommended for fresh and cooling tower water 

applications while cupro-nickel is recommended for ground and sea water applications)

9. CFM

a. Total CFM

b. Outdoor Air CFM

10. External Static Pressure

11. Altitude

12. Electrical Voltage/Phase/Hertz

13. Heat Type

After initial entry, the tool will search all possible options, and display those which may be 
acceptable. If a certain tonnage is not available given the project specifics, there is an option to view 
the reason for that unit’s rejection. Of the units available, select the one that is most suited to the 
project, based on CFM, motor speed, or leaving air conditions. Leaving air conditions off the coil 
as well as unit leaving air temperature are displayed. For distributors, a price is displayed. The unit 
selected will be saved as its current configuration. If circumstances change after the unit is saved, 
the program will require a reconfiguration, at which time the price will be adjusted as well.