LiftMaster SW470 SW490 GL BOARD Manual - Page 9

INSTALLATION POST MOUNTING (SW470) 1. Locate and anchor two posts made of 3" (7.6 cm) outer diameter heavy walled pipe. Posts should be parallel and square to the gate. IMPORTANT NOTE: The distance between mounting posts and the relative location of the operator to the gate and fence is critical. 2. Locate electrical conduit, as required, prior to pouring concrete. 3. Set mounting post and electrical conduit in place (Figure 2). Knockouts for 3" pipe clamps (not supplied) are provided in the operator. Figure 1 18.5" Fence 30" 9.5" 23" Parallel Mount Fence 20" 3" O.D. pipe (2 req'd.) Concrete pad 16 x 32 minimum Operator 3" O.D. pipe (2 req'd.) Figure 2 23" Concrete pad 16 x 32 minimum Perpendicular Mount Operator 3" U-bolt (4 required) Power and control wiring should be run in separate conduit 9