Page 39
B7
DAMPER
MOTOR
MOTORIZED OUTDOOR AIR DAMPER
FIGURE 31
D-Supply and Return Diusers
-
ufacturer’s instructions included with transition for detailed
installation procedures.
E-Economizer
(Optional Field- or Factory-Installed)
The economizer uses outdoor air for free cooling when
When outdoor air is suitable, the Unit Controller will mod-
air (RT6). Refer to unit controller manual for menu paths
to adjust economizer setpoints.
Sensors
Units are equipped with the following factory-installed, EC
Title 24 approved sensors:
RT17 - Outside Air Temperature
RT16 - Return Air Temperature
RT6 - Discharge Air Temperature
unit sensors to determine whether outdoor air is suitable
for free cooling. Refer to table 12. TEMP OFFSET
is the default mode.
Note - Network OAS signal and California Title 24 Com-
pliance options use either TEMPERATURE OFFSET or
TEMPERATURE SETPT mode.
Minimum Position
The Unit Controller will move the dampers to minimum po-
sition during the following:
Ventilation mode (G demand only)
Outdoor air is NOT suitable for free cooling
The damper position will vary linearly with blower speed
based on the damper position settings for high and low
CFM. Damper calibration must be initiated in the mobile
service app to set high and low damper positions.
GED (Gravity Exhaust / Barometric Relief Dampers)
Field-Installed Option
applications or when a PEF (power exhaust fan) is NOT
is installed, the GED is located in the exhaust air hood.
Horizontal Air Discharge Economizers
The economizer is located in the unit the same as down-
duct. The duct attaches to a duct transition and duct inlet
on the end of the unit. An optional GED is located in the
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