Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector 13
Air F low
D irection
D uct
D e te cto r
H ou sin g
Air F low
D irection
Air F low
D irection
Air F low
D irection
d hfig4
D o ts Ind ica te P o sition of
S am p lin g T u be H oles
Inlet
T ube
E xhaust
T ube
D uct
D e te cto r
H ou sin g
D uct
D e te cto r
H ou sin g
D uct
D etector
H o usin g
Inlet
T ube
E xhaust
T ube
In le t
T u b e
E xhaust
T ube
Figure 4: Tube Mounting Configurations with Varying Air Flow
Direction and Orientation of Detector Housing -
Vertical as well as Horizontal Mounting is Acceptable
The sampling inlet tube is identified by a series of air inlet holes on the
tube (Figure 5). This tube must be purchased separately. Order the
correct length for the width of the duct where it will be installed as
described in Table 4: Sampling Inlet Tubes in this technical bulletin. The
exhaust tube is molded into the base of the duct housing.
1.
Install the inlet tube in the inlet sampling tube bushing located in the
center of the duct detector housing (Figure 3).
2.
Face the air inlet holes into the air flow.
Note: To assure proper installation, the tube mounting flange is
marked with arrows.
3.
Mount the inlet tube so that the arrows point into the air flow.
Air flow and the various combinations of duct detector and tube
mounting configurations are shown in Figure 4.
Install the Inlet
Tube
