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177820-YIM-A-0506
Unitary Products Group 11
ECONOMIZER/MOTORIZED DAMPER AND RAIN HOOD
The instruction for the optional economizer/motorized
damper and rain hood can be found in form 035-
07364-000. Use these instructions when field assem-
bling an economizer rain hood onto a unit. The outdoor
and return air dampers, the damper actuator, the
damper linkage, the outdoor and return air divider baf-
fles, and all the control sensors are factory mounted as
part of the “Factory installed” economizer/motorized
damper options.
POWER EXHAUST/BAROMETRIC RELIEF DAMPER AND
RAIN HOOD
The instructions for the power exhaust/barometric relief
damper and rain hood can be found in form 530.18-
N1.10V.
All of the components, including the dampers, hard-
ware, and mounting instructions are shipped in a single
package external from the unit and must be field
assembled and installed.
Power exhaust is only available as a field installed
accessory.
ECONOMIZER AND POWER EXHAUST DAMPER
SET POINT ADJUSTMENTS AND INFORMATION
Remove the economizer access panel from the unit.
Loosen but do not remove the two panel latches.
Locate the economizer control module, where the fol-
lowing adjustments will be made.
Check that the damper blades move smoothly without
binding; carefully turn the Minimum Position Adjusting
screw (found on the damper control module) fully
clockwise and then set the thermostat indoor fan switch
to the on position and then off, or energize and de-
energize terminals “R” to “G”.
TABLE 3: ELECTRIC HEATER CFM LIMITATIONS
UNITMODEL SIZE NOMINAL
TONS
VOLTAGE
MINIMUM SUPPLY AIR CFM
HEATER SIZE NOMINAL KW
5 7 10 15 20 30
3
208/230-3-60 1100 1100 1200 1200 1300 -
460-3-60 - 1100 1200 1200 1300 -
575-3-60 - - 1200 1200 1300 -
4
208/230-3-60 1300 1300 1300 1300 1300 -
460-3-60 - 1300 1300 1300 1300 -
575-3-60 - - 1300 1300 1400 -
5
208/230-3-60 1600 1600 1600 1600 1600 1600
460-3-60 1600 1600 1600 1600 1600 1600
575-3-60 - 1600 1600 1600 1600 1800
Extreme care must be exercised in turning all
setpoint, maximum, and minimum damper
positioning adjustment screws to prevent twist-
ing them off.