Voltage Selection; Power Wiring - LiftMaster LA350 Manual De Instalación

WIRING
5. Mount a watertight junction box (not provided) that is able to accommodate two watertight
connectors (not provided) within 3 feet (0.9 m) of the second operator.
6. Remove the cover from the watertight junction box and set aside.
7. Route the operator cable through a watertight connector into the junction box.
8. Route the extension cable through a watertight connector into the junction box.
9. Connect the wires from the operator and the extension cable inside the junction box. Connect the
blue wire from the operator to the extension cable wire connected to the + terminal on the board.
Connect the brown wire from the operator to the extension cable wire connected to the - terminal on
the board.
10. Tighten the watertight connector nuts.
11. Reinstall the cover on the watertight junction box.

Voltage Selection

The operator can be wired for either 110-127 Vac or 220-240 Vac through a jumper setting.
NOTE: The factory default setting is 220 Vac.
For 110-127 Vac installations:
1. Turn off the AC power from the main power source circuit breaker.
2. Place the jumper on J3 and the cover on J2 on the control board.
For 220-240 Vac installations:
1. Turn off the AC power from the main power source circuit breaker.
2. Place the jumper on J2 and the cover on J3 on the control board.
To reduce the risk of SEVERE INJURY or DEATH:
• DO NOT TOUCH the unused connections on J2 or J3 as they are energized.
• Replace cover before reconnecting or connecting power.

Power Wiring

The operator can be wired for either 110-127 Vac or 220-240 Vac.
1. Turn off the AC power from the main power source circuit breaker.
2. Select a hole in bottom of the control box to be used for the incoming AC power.
3. Insert a watertight connector into the bottom of the control box and tighten with nut.
4. Insert the AC power wires through the watertight connector.
5. Connect the "hot" wire to the L terminal on the board.
6. Connect the neutral wire to the N terminal on the board.
7. Tighten the watertight connector nut.
8. Restore power to the control box.
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