Door closer 680 AL with back check 40-80 kg, EN2-4

Door closer 680:

• is suitable for interior doors with a width of 850-1100 mm and with a weight of 40-80 kg
• is suitable for left and right handed doors
• can be mounted on a door or frame, hinge or opposite side
• is adjustable by valves
• has an adjustble fire-resistant brake
• complies with European Union standard EN 1154
• is CE certified and can be used on a fire-resistant and on a smoke-resistant doors
• closing force conforms with class EN2-4
• guaranty for 2 years

Door closer adjustments:

• the valve must not be turned more than two turns counterclockwise from the factory position, as the screw may come loose and oil may leak out
• when turning the valves clockwise the door will close more slowly, when turning the valves counterclockwise the door will close faster
• the initial closing speed (valve 1) must be adjusted first and then the final closing speed (valve 2)
• if necessary, the windscreen brake (valve 3, pack check) can be adjusted. Turning the valve clockwise the brake applies earlier, turning the valve counterclockwise the brake applies later