System Sensor DH100 - Manual (Page 2)

[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
plastic sampling tube. Secure with the #8 self-tapping
screw into the bottom hole of the permanent tube.
NOTE: For ducts greater than 1 1 ⁄
2
feet in width, refer to
sections [5.4.1] and [5.4.2].
Figure 2. Sampling tubes connected to duct smoke
detector:
[4] Contents Of The Duct Smoke Detector Kit
1. Complete housing base and cover assembly
2. Two #10 x 1
1 /
4
" sheet metal 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 inlet tube end plug
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 inlet 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 inlet tube required for different
duct widths.
[5] Installation Sequence
[5.1] Verify Duct Air Flow Direction And Velocity
Model DH100 detectors are designed to be used in air han-
dling systems having air velocities of 500 to 4000 feet per
minute. Be sure to check engineering specifications to
ensure that the air velocity in the duct falls within these
parameters. If necessary, use a velocity meter to check the
air velocity in the duct.
[5.2] Drill The Mounting Holes
Remove the paper backing from the mounting template
supplied. Affix the template to the duct at the desired
mounting 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.
D100-67-00 2 I56-1148-08R
[3] Figure 1: Exploded View Of Duct Detector Components
FOAM
GASKETS
PLASTIC
SAMPLING TUBE
CONDUIT HOLES
DETECTOR
HOUSING
TERMINAL STRIP
DETECTOR
COVER
SAMPLING TUBE
FILTERS
COVER MOUNTING
SCREWS
PLASTIC SAMPLING TUBE
#8 SELF-TAPPING SCREW
POWER BOARD
DETECTOR BOARD