Periodic checks and adjustment of the opener are required to ensure safe operation. The model number label is located on the operator cover. As of date of manufacture, meets all ANSI/UL 325 Safety Standards and requirements for residential and commercial applications. ® TM H I G H L O W N OR M A L H I G H L O W N ORMA L UP FORCE DOWN FORCE Includes Lift-Master "Protector System" CONTENTS PAGE CONTENTS PAGE A review of safety alert symbols ..............................2 Safety reversing sensor i