International Door & Operator Industry

SEP-OCT 2017

Garage door industry magazine for garage door dealers, garage door manufacturers, garage door distributors, garage door installers, loading docks, garage door operators and openers, gates, and tools for the door industry.

Issue link:

Contents of this Issue


Page 40 of 118

straight arm connects to the door bracket and the curved arm connects to the trolley. With sectional doors, set the down limit so the straight arm is angled slightly back toward the motor head when the door is closed. With your left shoulder next to the door, the straight arm should point at one o'clock, and no more or less. Pointing it more will cause you to lose power at start and pointing it less could cause a failure in the operator's inherent safety reversing system. When in doubt always follow the manufacturers installation instructions. • Operators with dual lighting on the sides are superior to one light when driving into the garage at night…light should be provided where people exit the car and walk. • If you want to electrically operate a door over 7' high, you will need to use the rail for the next length up (8'). This must be observed even if the door only exceeds by 3". • Doors slightly higher than 7' need an operator rail for an 8' door. Price and plan the job accordingly. A 9' high door needs the rail for a 10' door. Consult the manufacturer if not sure. • Chain drives are the most durable. Belts are quieter, but more expensive. • Screw drives are less efficient than chain or belt drives. They are inefficient because of the extreme friction produced. This is why screw trolleys continuously fail or wear out. • Remotes and wireless keypads transmit on low power RF (radio frequency) and must be approved by the rules and regulations of the FCC (Federal Communications Commission under CFR 47article 15). • 47 C.F.R. 15.5 contains a general provision that devices may not cause interference and must accept interference from other sources. It also prohibits the operation of devices once the operator is notified by the FCC that the device is causing interference. Basically article 15 says remotes cannot produce any interference that may affect other wireless devices, but must accept interference from other RF transmitters. It is due to this standard we sometimes have interference in our radio devices. It is a federal rule! TECHNICAL (continued from page 36) • When you attach the red release handle to the trolley, ensure the handle or knob is only 72" from the floor so children can't reach it but adults can. • Most residential door operator manufacturers provide the more secure rolling code for their remotes with millions of potential codes. The rolling code changes with each operation and even if someone grabbed or copied the code, it would be useless to them. • Make sure all wires are well secured and not breached by a staple. Shorted wires are a common issue. If the homeowner claims the door has opened on its own, check the wires. Most often the problem will be a short by a staple. On dry days everything will be fine, then after a rain storm, the humidity goes up and the damp staple shorts the circuit. Insulated staples may help prevent this from occurring. You should also inspect the wires behind the pushbutton. If you find an old fashion key switch, you should convince the homeowner it compromises security, and offer the more secure keypad. Remotes on visors also compromise security. In warmer climates, people sometime leave the car window open a few inches where someone can reach in and steal the remote or walk up to a car parked in the driveway and press on the remote button with a stick and open the garage door. The best way to prevent this and enhance their security is to upgrade the customer to mini keychain remotes. The mini remote goes with the person's keys in their pocket or purse, and brought inside the home. Disclaimer With regard to technical articles provided by others, IDA, its publisher, and its agents, do not ratify, adopt, or endorse, or verify such opinions, and hereby state that opinions, expressed or implied, are solely those of the author. IDA recommends dealers follow applicable manufacturer's installation and maintenance instructions. "Operators with dual lighting on the sides are superior to one light when driving into the garage at night. Light should be provided where people exit the car and walk." 38 International Door & Operator Industry™

Articles in this issue

Archives of this issue

view archives of International Door & Operator Industry - SEP-OCT 2017