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Positive Closure Dampers (PCDs) (Optional)
The dampers remain open while the unit run state is active and close when the run state
is inactive.
Ensure that the actuator linkages are tight and the dampers are opening and closing. Refer
to “Positive Closure Dampers (PCDs)” on
page 14
for more details. Ensure the dampers
are functioning properly:
• When the unit run state is active, dampers are open
• When the unit run state is inactive, the dampers are closed
Operation Considerations
for Accessories
Resonant Speed Identification
Procedure
Positive Closure Dampers (PCDs)