On/Off Switch Power Wiring; Stop/Reset Button Control Wiring - Chamberlain LiftMaster Professional SW420 Owner's Manual

ON/OFF SWITCH POWER WIRING

NOTE: Before running power wiring refer to wiring specifications
on page 14 for correct wire gauges.
Secure all electrical power connections inside the disconnect
switch electrical box. Refer to electrical wiring diagram on page 30.
SINGLE PHASE
All single phase operators will have the following:
115V
• L1 (NEUTRAL), WHITE
• L2 (HOT), BLACK
• GROUND, GREEN
STOP/RESET BUTTON CONTROL WIRING (REQUIRED)
1. This control will function as a Stop/Reset command and is to
be wired within line of sight of the gate. The operator will not
function unless this circuit is completed.
2. Wire control station to terminals 3 and 5 in the control box on
the operator.
FIELD WIRING TERMINALS
STOP/RESET BUTTON WIRING
R1 R2 R3
W I R I N G
208/230V
• L1 (HOT), BLACK
• L2 (HOT), BLACK
• GROUND, GREEN
R4 3 5
STOP/RESET
ON/OFF Switch
Cover
Wire Nut Connections
(See Instructions)
Power Wiring Conduit
Control Conduit
STOP/RESET
Button
15