Lincoln Electric 3.1 - Manual (Page 10)

A-3 INSTALLATION
LFA 3.1 & 4.1 FUME EXTRACTION ARMS
A-3
INSTALLING THE LFA 3.1 OR 4.1
ARM ON A WALL MOUNTING
BRACKET
Only qualified personnel should install, use or service
this equipment.
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Leave the tape and plastic packaging on the extrac-
tion arm sections until the arm is completely installed
(including mounting the hood). The arm is spring-bal-
anced to compensate for the weight of the hood and
will spring out quickly if it is not mounted securely,
with the hood in place.
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MOUNTING THE WALL-MOUNTING BRACKET
Figure 1 shows suggested mounting methods for
installation on various wall types.
Figure 2 shows drilling dimensions.
Standard mounting height is approximately 7 ft. from
the floor to the lower mounting holes.
WARNING
9" (230 mm)
8.3"
(210 mm)
7.0 ft.
Fig. 2
CAUTION
3/8"
3/8"
3/8"
3/8"
Fig. 1
Mounting on a thin wall (recom-
mended minimum wall thickness
5 in. (100 mm), using four 3/8 in.
(M10) threaded rods.
Mounting on a thick wall using
four 3/8 in. (M10) cotter bolts.
Mounting on a steel I-beam using four
3/8 in. (M10) threaded rods and two
box-profile stabilizers (1x1x0.1 in.,
30x30x3 mm)