Visonic TOWER 20 AM - INSTALLER GUIDE REV Installation Instructions Manual page 6

House
premises
House
premises
2
⌧
NO
Figure 2 – House and Yard Protection
2
Protecting the House and Yard
1
- OK
Example 1 illustrates optimal installation. The detector does
not "look" into the neighbor's premises or street where
people or vehicles may move and be detected.
2 - NOT OK
Example 2 illustrates poor installation. The detector "looks"
into the neighbor's premises and into the street and may
detect objects moving outside of the protected area.
However, measures can be taken so that the detector does
not "look" outside the protected area. For example,
installing the detector opposite a high wall instead of
Neighbor's
opposite a low fence ensures correct installation.
premises
3 4
1
The motion of a person walking outside of the desired
OK
protected area may be detected and cause an unwanted
alarm (false alarm).
Street
3
Neighbor's
premises
4
Street
D-302845