Honda HRM 520 Owner's Manual page 15

Conditions for laying the boundary wire
Height of objects which the
lawnmower might run on top of
Maximum
5 mm
interval
Areas which the lawnmower might fall into
Acute angle
Image
Crossed
30 cm to 50 cm
More than
15 cm
More than
10° (17%)
Less than
10° (17%)
Radius
30 m
Right angle or
obtuse angle
Condition
Lay boundary wire around objects which the
lawnmower might run on top of (e.g. rocks, tree
roots, etc.); these objects must be removed
from the work area.
The boundary wire entry and exit points for a
round area should be separated by less than 5
mm. (However, the boundary wire should not
cross itself.)
There must be 30 cm to 50 cm of space
between the boundary wire and large objects.
(This space can be reduced to as low as 30
cm if you set [Wire Overlap] to a low value. For
details, consult your dealer.)
Lay fence around areas which the lawnmower
might fall into, such as uneven ground, ponds,
pools, driveways, or other areas with differences
in height.
Do not lay boundary wire so that it intersects on
a slope of more than 10° (17%).
You can lay boundary wire parallel to a slope of
more than 10° (17%) in order to access an area
with a slope of less than 10° (17%).
Boundary wire should be laid so that there is no
excess wire.
The lawnmower can detect the signal from the
boundary wire within a 30 m radius.
If the lawnmower enters a space inside the
work area with no boundary wire within a 30 m
radius, the signal will not be detected and the
lawnmower will stop.
The boundary wire must not be laid with any
acute angles. (Angles should be more than 90°.)
Installation
13