Pad Mount Installation - Chamberlain LiftMaster Professional SW420 Installation And Maintenance Instructions Manual

Pad Mount Installation

1 Layout the concrete pad as detailed in Figure
7. Locate the electrical conduit.
2 Excavate required areas for pad and conduit.
3 Locate (4) 3/8" x 6" minimum length L-Bolts
(not supplied) as shown in Figure
4 Pour concrete, insuring that pad is level and
above the ground line.
5 Allow concrete to set at least (2) days before
installing power unit.
6 Bolt the (2) pad mount brackets to the bottom
of the SW420 with the hardware provided.
7 After the concrete has set, secure the
operator to the pad.
8 The L-Bolts should be secured with hex nuts
and lockwashers (not supplied).
Pivot
Gate
18"x30" Pad
Minimum
3/8" L-Bolts
SW420 PAD
PARALLEL MOUNT
7.
Fence Line
01-G610F9
Hardware
Typ. (6X)
Figure 7
Operator cabinet may be installed either
parallel or perpendicular to the fence with
access cover away from fence.
Pad depth should be below the frost line or
as required by local codes.
The L-Bolts should protrude one inch above
the pad.
IMPORTANT NOTE: The relative location of
the operator to the fence and the gate is
critical. Be sure that the measurements for
operator mounting are taken from the
centerline of the fence and of the gate hinge.
Refer to Figure 7.
It is very important that the operator be level
and square to the gate.
The L-Bolts will protrude through the holes in
the mounting brackets.
Pivot
Gate
SW420 PAD
PERPENDICULAR MOUNT
Pad Mount Bracket
13
Installation
Fence Line
Doc 01-G0610
Rev A