System Sensor DH100LP - Manual (Page 2)

plastic sampling tube. Secure with the #8 self-tapping
screw into the bottom hole of the permanent tube.
NOTE: The sampling tube end cap is critical to the
proper operation of the duct smoke detector. The end
cap is needed to create the proper air flow to the sensor
of the duct smoke detector.
NOTE: For ducts greater than 1 1 ⁄
2
feet in width, refer to
sections [5.4.1] and [5.4.2].
[5.3] Secure The Detector Housing To The Duct
Slide the foam gaskets over the tube bushings as shown in
Figure 3. Use the two 1
1 ⁄
4
˝ long sheet metal screws to screw
the detector housing to the duct.
CAUTION: Do not overtighten the screws.
Figure 2. Sampling tubes connected to duct
smoke detector:
Figure 3. Installation of foam gaskets over sampling
tube bushings:
SCREW HOLES FOR
ATTACHING HOUSING
TO DUCT WORK.
[4] Contents Of The Duct Smoke Detector Kit
1. Complete housing base and cover assembly
2. Two #10 x 1
1 ⁄
4
” sheet metal machine screws for mounting
3. Two sampling tube filters
4. One test magnet
5. Drilling template
6. Two foam gaskets
7. Four #6-self tapping mounting screws for the metal
sampling tube and optional exhaust tube extension
8. One sampling tube end cap
9. Metal sampling tube end plug
10. One plastic sampling tube
11. One #8 self-tapping screw for the plastic sampling tube
NOTE: For ducts over 1 1 ⁄
2
feet, longer sampling tubes
must be ordered to complete the installation. They must
be the correct length for the width of the duct where
they will be installed. See Table 1 on page 3 to determine
the sampling tube required for different duct widths.
[5] Installation Sequence
[5.1] Verify Duct Air Flow Direction And Velocity
Model DH100LP detectors are designed to be used in air
handling systems having air velocities of 100 to 4000 feet
per minute. Be sure to check engineering specifications to
ensure that the air velocity in the duct falls within these pa-
rameters. If necessary, use a velocity meter (anemometer)
to check the air velocity in the duct.
[5.2] Drill The Mounting Holes
Remove the paper backing from the mounting template sup-
plied. Affix the template to the duct at the desired mount-
ing location. Make sure the template lies flat and smooth
on the duct. Center punch holes A and B. Drill the holes as
indicated on the template.
[5.2.1] Sampling Tube Installation for Ducts Less
Than 1
1 ⁄
2
Feet Wide (see Figure 2)
1. Remove the front cover.
2. Slide the plastic sampling tube into the housing bushing.
3. Align the holes in the bushing with the holes in the sam-
pling tube. Make sure there are six exposed holes on the
D200-15-00 2 I56-0083-009R
[3] Figure 1. Exploded View Of Duct Detector Components:
FOAM
GASKETS
PLASTIC
SAMPLING TUBE
SAMPLING TUBE
FILTERS
PLASTIC SAMPLING TUBE
SELF-TAPPING SCREW
DETECTOR
COVER
DETECTOR BOARD
CONDUIT HOLES
DETECTOR
HOUSING
TERMINAL STRIP
POWER BOARD
COVER MOUNTING
SCREWS
H0100-00
H0110-00
H0107-00