1

It’s Damper MagicHow do those Dampers Work?

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

3

Residential Direct Drive Damper Actuators

Old Style Actuator New Style Actuator

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

5

Residential Direct Drive Damper Actuator

Old Style Actuator

RED

Release Button

6

Residential Direct Drive Damper Actuator

New Style Actuator

Release Button

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

11

Actuator on all New Dampers 45 º Replacement Actuator for old round and all new dampers.

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

13

Replacement Actuator for All New Dampers and Old Round Dampers

Fits older round shaft or newer flatted shaft fit in hub

90º version available for slip in and older rectangular dampers

Note replacement actuators have a” –R” after the DAMPACT part number