Specifications

035-17377-000 (0201) REV A
28 Unitary Products Group
ECONOMIZER
The economizer can be factory or field installed. If factory
installed, refer to the instructions included with the outdoor air
hood to complete the assembly. Field installed economizers
include complete instructions for installation.
RAIN HOOD
The following procedure should be used when assembling
the economizer rain hood onto a unit. The outdoor and return
air dampers, the damper actuator and gears, the outdoor and
return air divider baffles, and all chosen control sensors are
factory mounted as part of the economizer option.
All of the hood components, including the filters, the gasket-
ing, and the hardware for assembling, are packaged and
located between the condenser coil section and the main unit
cabinet.
To assemble the rain hood:
1. Remove the hood components, filters, gasketing, and
assembly hardware from the area between the coils and
main cabinet.
2. Follow the instructions included with the hood to com-
plete the installation.
SET POINT ADJUSTMENT
1. The enthalpy set point for the dampers may now be set
by selecting the desired setpoint. Adjust as follows:
• For a single enthalpy carefully turn the set point adjust-
ing screw to the “A”, “B”, “C” or “D” setting corresponding
to the lettered curve.
• For a dual enthalpy carefully turn the set point adjusting
screw fully clockwise past the “D” setting.
FIGURE 19 : ENTHALPY SET POINT CHART