2
Modulating Zone Dampers
(24vac Triac
open/close)
•
All Dampers do not drive at the same time•
18-sec. full open (motor stalls)
•
20-sec. full close (motor stalls)•
Damper Modulates ( 1-sec.=1-position)
•
16 Damper positions•
Damper position 0=Closed, 15=Open
15=1.5 deg. out of set point10=1.0 deg out of set point5=0.5 deg out of set point
•
Manual Duct Assessment or Sensor/Damper Check Will Alert you of a damper problem
4
Damper Installation•
Round damper blade/actuator drives 45 deg.
•
Rectangular damper blade/actuator drives 90 deg.
Open
45 deg/round 90 deg/rectangular
Closed Closed
OpenOpen=CCW
Closed=CW
7
Install Damper per Airflow Arrow
Install Damper so rod is in horizontal position to support weight of blade
zone???
Damper Installation
8
New Dampers and Actuators
•
New dampers with shorter lengths
•
More compact actuator
•
New actuators are blue
9
New Damper Part Numbers
•
DAMPRNDxxxxx-B
•
DAMPRECxxxxx-B
•
Both new dampers used 45 degree actuators
10
•
DAMPACT45DEG-RUsed on older round and new rectangular
dampers •
DAMPACT90DEG-RUsed on slip in and older rectangular
dampersNote the –R used to designate replacement actuators
New Replacement Actuator Part Numbers
12
Actuator on All New Dampers
New shafts have 2 flats that align them properly
Cannot be used on older dampers with round shafts
Note part number for new actuators
No need for set screw, wont slip
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