Assa Door Lock - Manual (Page 2)

I n t r o d u c t i o n
UNION Hydraulic Door Closers are manufactured to exacting standards and are recognised
for their quality, efficiency and reliable performance.
Effective door installation requires that the door and frame be of sufficient strength or
reinforced to ensure secure anchorage of the door closer unit.
A door fitted with a door closer must be hung on good quality aligned hinges so that the
door swings freely without bias in both directions. The closed door must be clear in the door
frame and when a lock is fitted the latch bolt must engage freely with the strike.
When specifying manually operated door closers the following should be considered: door
size, in particular width of door; door weight; type of installation; environmental conditions;
location of door; operation frequency of door; the people using the door.
Door size and the pressure exerted on the surface area of the door due to wind gusts or air
conditioning and the spring strength required to hold or close the door against this pressure
must be considered along with the ability of the user to exert the force necessary to push or
pull the door open. The location of door furniture will influence the leverage available to the
person opening the door.
Floor or wall mounted door stops should be fitted to prevent possible damage to the door
unit or surrounds where a door may be subject to violent opening; to stop a door from being
forced past the position where the arms are fully extended; or to stop a door at a specific
position to clear feature walls, glass panels, furniture, etc.
DOOR CLOSERS 19/7/02 2:26 pm Page 2