LiftMaster HCTDCU HCTDCU Installation Manual - Page 15

WIRING To reduce the risk of SEVERE INJURY or DEATH: • ANY maintenance to the operator or in the area near the operator MUST NOT be performed until disconnecting the electrical power (AC or solar and battery) and locking-out the power via the operator power switch. Upon completion of maintenance the area MUST be cleared and secured, at that time the unit may be returned to service. • Disconnect power at the fuse box BEFORE proceeding. Operator MUST be properly grounded and connected in accordance with national and local electrical codes. NOTE: The operator should be on a separate fused line of adequate capacity. • ALL electrical connections MUST be made by a qualified individual. • DO NOT install ANY wiring or attempt to run the operator without consulting the wiring diagram. We recommend that you install an edge sensor BEFORE proceeding with the control station installation. • ALL power wiring should be on a dedicated circuit and well protected. The location of the power disconnect should be visible and clearly labeled. • ALL power and control wiring MUST be run in separate conduit. STEP 6 POWER WIRING NOTE: The operator can also be powered by solar panels, refer to the dealer extranet on LiftMaster.com for more information. Proper grounding gives an electrical charge, such as from an electrical static discharge or a near lightning strike, a path from which to dissipate its energy safely into the earth. The ground wire MUST be a single, whole piece of wire. NEVER splice two wires for the ground wire. If you should cut the ground wire too short, break it, or destroy its integrity, replace it with a single wire length. Use the proper type earth ground rod for your local area. In certain circumstances, metal water pipes may be allowed for grounding the operator. Check and follow all local codes for proper grounding procedures. 1. Turn off the AC power from the main power source circuit breaker. AMERICAN MAXIMUM WIRE WIRE GAUGE LENGTH (120 VAC) (AWG) 14 130 feet (39.6 m) 12 205 feet (62.5 m) 10 325 feet (99.1 m) 8 520 feet (158.5 m) 6 825 feet (251.5 m) 4 1312 feet (399.9 m) Use copper conductors ONLY. MAXIMUM WIRE LENGTH (240 VAC) 260 feet (79.3 m) 410 feet (125 m) 650 feet (198.1 m) 1040 feet (317 m) 1650 feet (502.9 m) 2624 feet (799.8 m) 2. Run the AC power wires to the operator. 3. Loosen the nut on the cover of the EMI board and slide the cover back. 4. Connect the green wire to the ground 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. Ensure the power wiring connector is connected to either the 120 or 240 Vac socket depending on the application. Factory default is 120 Vac. 8. Slide the EMI cover back and tighten nut. 9. Connect the batteries then turn on the AC power. Connect the J15 plug to the control board. NOTE: The AC Power switch on the operator will turn the incoming 120/240 Vac power ON or OFF. The operator's AC Power switch ONLY turns off AC power to the control board and DOES NOT turn off battery power. Input Power Connection GROUND HOT NEUTRAL Minimum 12 Gauge Ground Wire Use UL listed conduit to enclose power wires Green White White Black Red Piggy Back AC Power Switch EMI BOARD Power Wiring Connector Power Wiring Sockets (120 Vac factory default) 15