Supply PowerMaster Model APT Drawbar Operator(s)RATED 1/2 HP, 115 VOLTS, 1 PHASE, for use on Standard Lift Sectional Doors where high cycles and quiet operation are required. Primary reduction shall be by heavy duty V-Belt Drive. Secondary reduction shall be a chain and sprocket arrangement.
Motor shall be 115 VAC Resilient Mount PSC, continuous duty industrial type protected from overload by a current sensing or thermal type overload device. Electrical components shall be installed in a NEMA 1 enclosure integral to the operator. A transformer shall be provided to reduce control voltage to 24 VAC. Separate terminal strips shall be provided for connection of power supply line and all control devices. Operator shall be wired to accept control stations, safety devices and other access control equipment.
Control circuit shall provide instant reverse motor wiring. Positive chain driven, rotary type limit switches shall be provided to limit full open and close travel of door. Limit switch adjustment shall not be affected by removal of motor or by manual operation of door. An adjustable torque limiting clutch shall be provided to prevent overloading of the operator. A disconnect arm for manual operation of the door shall be provided in case of power failure. The final reduction and drive shall be heavy duty roller chain and sprockets. The drive shaft shall be supported by oilite bearings and be a minimum of ¾ inch diameter.