Chamberlain LA500 Installation Manual page 23

STEP 8 continued...
POWER WIRING
LARGE METAL CONTROL BOX
To use solar panels with the Large Metal Control Box (Model
XLSOLARCONTDC) skip the steps below and refer to the Solar Panels
section in the Appendix, pages 45-49.
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.
8. Unplug the J15 plug labeled BATT(-)(+) DC(-)(+) on the control
board by squeezing the plug and pulling it from the control board.
9. Connect a jumper between the positive (+) terminal of one battery to
the negative (-) terminal of the other battery.
10. Connect the red wire from the J15 plug labeled BATT (+) to the
positive (+) terminal of the battery.
11. Connect the black wire from the J15 plug labeled BATT (-) to the
negative (-) terminal of the battery.
12. 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.
13. Plug the transformer in.
14. Turn ON AC power.
INSTALLATION
21
LARGE METAL CONTROL BOX (LA500CONTXLMDC)
Junction Box
Cover
J15 Plug
Black
Jumper
Wire
Red Wire