Edwards Signaling E-PDD - Manual

© 2013 UTC Fire & Security. All rights reserved. 1 / 6 P/N 3101210 • REV 02 • ISS 28JAN13
E-PDD Duct Smoke Detector Installation Sheet
Operation
The duct smoke detector's primary purpose is to provide early
warning of an impending fire and shut down the HVAC unit in
order to prevent smoke from circulating throughout the
building. The duct smoke detector is designed for use in duct
applications where temperatures can exceed standard detector
capabilities.
Air is introduced to the duct smoke detector's sensing chamber
through a sampling tube that extends into the HVAC duct and
is directed back into the ventilation system through an exhaust
tube. The difference in air pressure between the two tubes
pulls the sampled air through the sensing chamber. When a
sufficient amount of smoke is detected in the sensing chamber,
the duct smoke detector notifies the fire alarm control panel.
The device address is set using the two rotary switches located
on the front of the unit. One device address is required.
The detector is capable of performing comprehensive self-
diagnostics and storing the results.
In installations where the duct smoke detector’s controls and
indicators are hidden from view, a remote test station or an
LED indicator can be connected to the detector to provide
these functions.
Jumper setting operation
The following jumper settings determine the operation of the
detector.
Figure 1: Jumper setting
JP3
3 2 1
Table 1:Jumper settings
Setting Operation Description
1-2 Alarm Factory Default: Configures the detector
for alarm latching operation
2-3 Supervisory Configures the detector for supervisory
operation
LED operation
The detector provides two LEDs, visible from the front side of
the detector, that show its status.
LED Description
Power LED Off when the detector is in the alarm state
Flashes intermittently when the detector is in
the normal state
Alarm/active LED Indicates the detector is in the alarm/active
state as follows:
Flashes at a continuous rate if the first
detector is in alarm/active
Flashes intermittently if not the first detector
in alarm/active
Installation
WARNINGS
• The duct smoke detector is not intended as a substitute for
open area protection.
• This detector will not operate without electrical power. As
fires frequently cause power interruption, you should
discuss further safeguards with your local fire protection
specialist.
• The duct smoke detector will not operate as designed
outside of the listed electrical and environmental
specifications.
• The duct smoke detector will not sense smoke unless the
ventilation system is operating and the sensor’s cover is
properly installed.
• The duct smoke detector may not operate as designed
unless installed in accordance with these instructions and
all applicable national and local codes as determined by
the local authority having jurisdiction.
Note: Read these instructions thoroughly before installing. In
addition to this document, important information can be found
in Technical Bulletin P/N 3101212.