Key Differences between a SOMMER garage door opener and common competitors:
- No “Motor Head” at the back of the opener… our “Control Housing” contains the circuit board, transformer, and light bulb sockets… and that’s about it!
- We have a traveling 24v DC powered motor that moves back and forth along a FIXED CHAIN inside our C-Rail. A steel cog on the motor is basically the only moving part and pulls the motor along the chain… this cog won’t strip!
- The BIG Question: How does the motor get its power? ANSWER: Through the C-Rail (the negative -) and the Chain itself (the positive +) . It’s actually a very simple design that is super durable and super quiet… customers love it!
- IMPORTANT NOTE about making sure that 24v DC power actually gets to the motor: There are two chain tensioner assemblies (called “Slide-In Parts” in manual) that go in each end of the Rail. The REAR tensioner has a black rectangle and an electrical contact. That electrical contact matches up with an electrical contact on the Control Housing, which slides over the back of the rail and transmits power from the transformer to the rail and the chain.
-Chain must be installed with the SMOOTH side of the insulating cover facing OUTWARD from the rail… you need to see the smooth side when installed.
-Photo Eye Wiring: Solid White & Solid White wires together in terminal 6, Blue Dash & Blue Dash wires in Terminal 5.