Duct and Damper Control System |
 |
Description and Purpose
Duct and damper controls are used in HVAC
systems to direct air flow through air conditioning, heating ducts and
ventilation systems.
In larger facilities, common air return ducts
recycle air within rooms, routing air from rooms within the facility back
into the main HVAC system. |
Figure 1: Controlling Ducts |
In the event of a fire, air
return ducts can route smoke and other toxic fumes throughout the
building. Duct and damper control systems control ducts, so that when a
fire alarm system activates within a particular room or department,
dampers within air return ducts close, containing smoke and toxic fumes in
the area where they originated.
Likewise, in
Energy Management systems, dampers may be installed inside of ducts
that distribute conditioned air into a room or department. When a door or
window is open in the room or department, the energy management system can
close dampers within ducts to limit distribution of conditioned air into
the room.
The
fire alarm,
intrusion,
remote control or
panic system can integrate duct control so that in the event of a
crisis, the system can close ducts so that air flow is limited. The
maximum number of ducts that can be controlled by the system depends on
the
control panel you choose.
Connections and Considerations
The table below refers to the drawing in
Figure 1. If you are using
this document on line, click the model number in the table below to see
more information.
|
Item |
Model No. |
Description |
Mounting Options |
Notes |
|
D |
4101SN |
Relay: Addressable with zone input |
|
I/O Module |
|
V |
V-Plex |
V-Plex™ Data Bus |
|
Connects to addressable devices, zone input devices and
relay modules. |
|
Y |
Genesis:
4506 |
2-wire, 18 AWG, Fire rated, Non-shielded |
Use Genesis 1118 for Non-Fire Applications |
This part number is an example. See your building and
electrical codes for actual jacketing requirements. |
Solving Air Flow Issues
For fire safety reasons, automatic dampers are
often installed inside return air ducts. In the event of a fire, the
fire alarm system can close dampers that are held open, to reduce the
spread of smoke and toxic fumes within the facility. Likewise, in the
event of a panic alarm, the
panic system can close ducts to contain chemical gas, and biological
hazards.
|
