User manual CHAMBERLAIN HC300

[. . . ] Handle tools and hardware carefully and do not wear rings, watches or loose clothing while installing or servicing a gate opener. Installation and wiring must be in compliance with Your local building and electrical codes. [. . . ] Actuator unit length 97cm Motor thermal overload switch 140 °C Rated weight of motor 6. Please keep in mind, that you will need parts not included in the packaging (tubes, cable, screws, rawlplug and so on) Installation preparation As an example, Illustration 4 illustrates installation with a stone or steel post construction. The installation dimensions for the gate actuator unit are dependant on the fastening points of gate to post. Llustration 5 shows the meaning of installation dimensions A and B. The measurements chosen also determine the opening and closing times and the maximum opening angle of the gate. As a rule: B greater than A A greater than B slower, smoother closing, gate opens faster. Greater opening angle, however, when closing, the gate makes a harder and faster contact with the post stop. For an opening angle of 90°, addition of the dimensions A and B always gives the total actuator stroke. When a gate opening angle greater than 90° is required, dimension B will need to be reduced accordingly. In order to obtain the optimum dimensions, it may be necessary to shorten or lengthen the hinge plates supplied. In the case of a new gate, dimensions A and B may be changed when the gate angle brackets are fastened to the post accordingly. Before the installation dimensions are finalised, ensure that the gate actuator unit does not touch the post when moving. [. . . ] Then extend the actuator to its maximum length. Re-tighten the actuator unit by turning the screw a halfturn in the anticlockwise direction (Illustrations 9 and 10). [. . . ]