Chamberlain HDSW24UL Installation Manual page 19

All control wiring used to connect external devices to Class 2 circuits of the operator must be (QPTZ) Power-Limited Circuit Cables, Type CL2, CL2P,
CL2R, or CL2X or other cable with equivalent or better electrical, mechanical, and flammability ratings.
1. Turn off the AC power from the main power source circuit breaker.
2. Run the AC power wires to the operator.
3. Make sure the operator AC switch is in the OFF position, see page 20.
4. Remove the junction box cover from the electrical box by loosening the screws and sliding the cover to the side.
5. 120 Vac: Factory default is 120 Vac. Skip to 5.
240 Vac: Unplug the power wiring connector from the 120 Vac socket (factory default location) and plug it into the 240 Vac socket.
NOTE: The accessory outlets are disabled and cannot be used with the 240 Vac option.
6. Connect the incoming green wire to the green ground wire using a wire nut.
7. Connect the white wire to NEUTRAL using a wire nut.
8. Connect the black wire to HOT using a wire nut.
9. Replace the junction box cover. Ensure the wires are not pinched.
INSTALLATION
240 Vac Socket EMI Board
Power Wiring Connector
(120 Vac Socket factory default)
EMI Board
White
Black
Green ground wire
19
Junction Box Cover
Incoming
Power
Green