Damper Assemblies - Daikin RoofPak RPS Series Installation And Maintenance Manual

Damper Assemblies

The optional damper assemblies described in this section
normally are ordered with factory-installed actuators and
linkages. The following sections describe operation and linkage
adjustment of the factory installed option.
Economizer Dampers
Outside air intake is provided on both sides of the unit, and the
return air path is at the center of the damper set. As the single
actuator modulates the outside air dampers open, the return
air dampers close. Exhaust air exits the unit through the gravity
relief dampers provided at the end of the economizer section.
The damper is set so that the crankarm moves through a
90- degree angle to bring the economizer dampers from full
open to full close (see Figure
linkage is from the filler section. Mechanical stops are placed in
the crankarm mounting bracket. Do not remove stops. Driving
the crankarm past the stops results in damage to the linkage
or damper. The unit ships with a shipping bolt securing the
linkage crankarm. Remove shipping bolt before use.
www.DaikinApplied.com
61). Access to the actuator and
Figure 61: Damper Adjustment
O u t s i d e
A i r
O u t s i d e
A i r
S h a f t . 5 0 0 D i a .
x 1 . 5 0 L o n g
O A
O p e n
NOTE: For good airflow control, adjust linkages so damper
blades do not open beyond 70 degrees. Opening a
damper blade beyond 70 degrees has little effect on
its airflow.
Do not "over close" low leak damper blades. The
edge seal should just lightly contact the adjoining
blade. The blades will lock up if they are closed so far
the seal goes over center.
45 IM 926-3 • ROOFPAK APPLIED SYSTEMS
Mechanical Installation
O p t i o n a l R e t u r n A i r F a n
E c o n o m i z e r
9 0 °
O A
S t r o k e
C l o s e d
. 2 5
3 . 0 0
. 7 5