Connect A Battery Backup To The Control Box (Optional) - LiftMaster LA350 Manual De Instalación

WIRING

Connect a Battery Backup to the Control Box (Optional)

The batteries are charged in the circuit by the integrated transformer.
Recommended items for a battery backup application (not provided):
• Two 12V 4Ah batteries (McNair Model RB-FM-12V-4AH)
• Battery box (Attwood Model 9069-1)
• 3 x 18 AWG (1.00 mm) VM-1 105°C 600V, 1 wire must have a 10A/250V in-line fuse
1. Disconnect/turn OFF AC power to the operator.
2. Select a hole in the bottom of the control box to be used for the battery backup cable (not
provided).
3. Insert a watertight connector (not provided) into the bottom of the control box and tighten with
nut.
4. Insert the battery cable through the watertight connector mounted in the bottom of the control box.
5. Connect the battery cable to the BATTERY terminal on the control board.
6. Tighten the watertight connector nut.
7. Install battery box in desired location (no further than 10' away).
8. Place the batteries in the battery box.
9. Connect a jumper with an in-line fuse between the positive (+) terminal on one battery and the
negative (-) terminal on the other battery.
10. Connect the positive battery cable wire to the positive (+) terminal on the battery.
11. Connect the negative battery cable wire to the negative (-) terminal on the other battery.
12. Reconnect/turn ON AC power to the operator.
CONTROL BOARD
Jumper with
10A/250V
in-line fuse
(not supplied)
16