· If we are using door closers with bolt type MS, SAM, FRN and even hidden overhead door closers and they are going to mount the door in the open position, the dial (bolt) located on the door closer must be rotated to 90 degrees according to the direction of assembly. If this condition is not met, instead of closing, the opposite happens.
· Strictly respect the design capabilities established for door closers (the weight and maximum width of the leaf). Exceeding the width generates overtorque (leverage effect), destroying the hydraulic seals.
· Ensure absolute vertical alignment between the floor brake shaft and the upper pivot. Deviations cause hardware failures and breakages and door closer failures. (Use a laser level to have greater precision)
· Independently calibrate the sweep speed (90°–15°) and closing speed (15°–0°).
· Calibration of the speeds should be carried out after the door has been assembled. The control valves should not be touched before assembly.
· In the case of applications in places with a lot of wind, they must choose a door closer with opening braking (backcheck) to prevent wind pressures from moving the door towards the wall abruptly, which can cause the glass or other elements that are part of the system to break.
· In accesses with strong currents or building air pressures, use door closers with variable adjustable force to compensate for resistance.
· Adjust the valves according to the change in temperature taking into account the region, since the viscosity of the oil changes according to the temperature.
· The maximum number of turns implemented in the adjustment of the valves related to the sweeping and closing speed is 2 turns maximum, all this in order to prevent the seal that prevents the oil from escaping the system from breaking (O-RING)
· The appearance of oil stains under the cap demands immediate replacement of the body.
· The accumulation of water inside the door closer can cause corrosion of the parts made of cast iron (Main body).
· Select the door closer according to the degree of human traffic: Grade 1 (High, +2M cycles), Grade 2 (Medium, 1M cycles) or Grade 3 (Low, 500k cycles). ANSI/BHMA A156.4 Standard
Technical coordinator of Olimpia Hardware with extensive experience in access solutions in the aluminum and glass industry. Participates in the team of development and implementation of systems aimed at improving safety in different types of facilities. Their focus is on helping to identify the most suitable accessories for each type of door and level of protection, combining reliability, technology and efficiency.