Edwards Signaling E-PDD - Manual (Page 3)

P/N 3101210 • REV 02 • ISS 28JAN13 3 / 6
5. Mount the duct smoke detector on the HVAC duct and
secure it using two sheet metal screws provided.
6. If using an air sampling tube that is longer than the width
of the duct, cut the tube so that approximately one inch of
the tube extends through the duct. Seal the opening
around the tube with an approved duct sealant as shown
in Figure 4.
Figure 4: Duct detector installation
HVAC duct
Airflow
Sampling
tube
Detector
#10 sheet metal screw (2X)
Figure 5: Sampling tube support
HVAC
duct
Sampling
tube
Exhaust tube
Plug
Detector
Sealant
Airflow
36 in ≥
7. Verify that all field wiring is free of opens, shorts, and
ground faults.
8. Make all wiring connections as shown in “Wiring.”
9. Set the module address as follows:
Use a screwdriver to adjust the two rotary switches on the
front of the module. Set the TENS rotary switch (0 through
12) for the 10s and 100s digit and the ONES rotary switch
for the 0 through 9 digit. For example: device address 21,
set TENS rotary switch to 2 and set the ONES rotary
switch to 1.
Refer to “Specifications” for available address numbers.
Figure 6: Duct detector address
0 1
2
3
4
5 6
12
11
10
9
8 7
0 9
1
2
3
4 5
6
7
8
Insert screwdriver here
10. Set jumper JP3 to appropriate position. Refer to
“Operation.”
11. Verify the air pressure differential value falls within the
specified operating range of the detector in accordance
with procedures specified in “Maintenance and testing.”
12. After completing installation of the duct smoke detector,
test the detector to ensure it is operating correctly in
accordance with procedures specified in “Maintenance
and testing.”
Maintenance and testing
Verify the air pressure differential:
In order to verify air pressure differential, air must be moving
through the HVAC system.
To verify the air pressure differential:
1. Connect a suitable air pressure differential meter to the
sampling tube and exhaust tube openings as shown in
Figure 7.
2. Verify that the air pressure differential measured falls
within the specified operating range of the detector.
3. If the air pressure differential measured does not fall within
the specified operating range of the detector, make sure
the sampling tube air holes are not obstructed and are
facing the HVAC system airflow.