Chamberlain RJO20 RJO20 Owner s Manual - English - Page 14

Screw #6 (2) Lag Screw 5/16"-9x2" Screw 1/4-20 (2) #8 Hex Head Screw (2) Installation (continued) 7 Attach the Cable Tension Monitor 1. Mark and drill 3/16 inch pilot holes for screws. If the cable tension monitor cannot be mounted into wood, it can be mounted into 1/2 inch (1 cm) or greater drywall using the drywall anchors (2) and the #8 screws (2) provided in the hardware bag.
 2. Attach the cable tension monitor to the wall using the hardware provided. Check that the roller is on top of the cable. 
 3. Run wire to garage door opener. Securely affix wire to wall and ceiling. Secure any additional wire away from the moving parts of the door. 4. Connect wire to the green quick-connect terminals on the garage door opener. NOTE: Cable must have tension through entire door travel. Check there is no slack in cable on opposite side of garage door during normal operation. If slack occurs during door travel, contact a trained door systems technician . Wall Anchor (2) YOU WILL NEED Screw 14-10x2" (2) Drywall Anchor (screw-in) (2) Screws #8-32x1" (2) #8 Hex Head Screw (2) Staples Screw #6 (2) Lag Screw 5/16"-9x2" Staples Screw 1/4-20 (2) Wall Anchor (2) Shim or add wood block if needed. The cable tension monitor MUST be flush with the mounting surface. The cable tension monitor roller must be free from obstructions. Wall Drum Wall Anchor (2) Staples Wall Anchor (2) Cable Tension Monitor Header Cable Tension Monitor Roller To insert or release wire, push in tab with screwdriver tip Cable WHT/ GRN Garage door opener Staples 14