Power Wiring (Large Metal Control Box [Xlm]) - Chamberlain Liftmaster Elite LA500-S Installation Manual

WIRING

POWER WIRING (LARGE METAL CONTROL BOX [XLM])

NOTE: Wiring the Large Metal Control Box for 240 Vac will require the optional toroid
transformer kit (refer to Accessories).
1
Turn OFF AC power to the operator at the circuit breaker and unplug the
transformer.
2
Run the AC power wires to the control box.
3
Remove the junction box cover.
4
Connect the green wire to the earth ground rod wire using a wire nut.
5
Connect the white wire to NEUTRAL using a wire nut.
6
Connect the black wire to HOT using a wire nut.
7
Replace the junction box cover. Ensure the wires are not pinched.
CONNECT BATTERIES
1
Unplug the battery connector to the J15 plug labeled BATT(-)(+) DC(-)(+) on
the control board by squeezing the plug and pulling it from the control board.
2
Connect a jumper between the positive (+) terminal of one battery to the
negative (-) terminal of the other battery.
3
Connect the red wire from the J15 plug labeled BATT (+) to the positive (+)
terminal of the battery.
4
Connect the black wire from the J15 plug labeled BATT (-) to the negative (-)
terminal of the battery.
5
Plug the J15 plug into the control board. The control board will power up.
NOTE: You may see a small spark when plugging the J15 plug into the board.
6
Plug the transformer in.
7
Turn ON AC power.
POWER WIRING (LARGE METAL CONTROL BOX [XLM])
Junction
Box Cover
23
LARGE METAL CONTROL BOX (XLM)
Battery Connector
J15 Plug
Red Wire
Black Wire
Jumper