Power Wiring Introduction; Power Wiring (Standard Control Box) - Chamberlain Liftmaster Elite LA500-S Installation Manual

WIRING

POWER WIRING INTRODUCTION

The standard control box can be wired for either 120 Vac or 240 Vac.
Factory default is 120 Vac. The Large Metal Control Box (XLM) can be
wired for 120 Vac (default) or it can be wired for 240 Vac with the
optional toroid transformer kit (refer to Accessories).
The batteries are charged in the circuit by the toroid transformer,
plug-in transformer, or the solar panels. Main power supply and control
wiring MUST be run in separate conduits.
Follow the directions according to your application. For solar
applications proceed to Solar Panels section on page 24.
NOTE: If using an external receiver use shielded wire for the connections or mount
the receiver away from the operator to avoid interference with the operator.

POWER WIRING (STANDARD CONTROL BOX)

1
Turn off the AC power from the main power source circuit breaker.
2
Run the AC power wires to the control box.
3
Remove the toroid assembly from the control box by loosening the four screws
and lifting the assembly up and out.
4
Ensure the 120/240 plug is connected to either the 120 or 240 Vac connector on
the EMI board depending on your application. Factory default is 120 Vac.
5
Connect the ground wire to the ground screw on the back of the toroid assembly.
6
Connect the white wire from the toroid assembly to NEUTRAL using a wire nut.
7
Connect the black wire from the toroid assembly to HOT using a wire nut.
8
Replace the toroid assembly and tighten the four screws. Ensure the wires are not
pinched.
CONNECT BATTERIES
1
Plug the battery connector to the J15 plug labeled BATT(-)(+) DC(-)(+) on the
control board. The control board will power up. NOTE: You may see a small
spark when plugging the J15 plug into the board.
2
Turn ON AC power to the operator.
POWER WIRING INTRODUCTION + POWER WIRING (STANDARD CONTROL BOX)
AMERICAN WIRE
GAUGE (AWG)
NOTE: Use copper conductors ONLY.
Toroid
Assembly
22
MAXIMUM WIRE
LENGTH (120 VAC)
14 130 feet
12 205 feet
10 325 feet
8 520 feet
6 825 feet
4 1312 feet
STANDARD CONTROL BOX
MAXIMUM WIRE
LENGTH (240 VAC)
260 feet
410 feet
650 feet
1040 feet
1650 feet
2624 feet
(back view of toroid assembly)
240 Vac
Connector
120 Vac
Connector
Ground
Screw
(incoming power wires)
Battery Connector
J15 Plug