What is L and S on a door closer?

What is L and S on a door closer?

S and L are closing speed adjustment valves for a commercial door closer; where “S” indicates the sweep speed valve adjustment and “L” indicates the latch speed valve adjustment.

How do I lower the tension on my door closer?

Turn the “L” screw clockwise to increase the speed with which the door closes during the last one-third of its swing. Alternatively, turn it counterclockwise to reduce this speed. Increase the pressure it takes to open the door by turning the “BC” screw clockwise. Turn it counterclockwise to reduce this pressure.

How do you adjust a door closer to slamming?

If the door slams shut or closes too slowly, adjust the pneumatic cylinder:

1. To slow the closing, turn the screw on the end of the pneumatic cylinder clockwise.
2. To speed up the closing, turn the screw counterclockwise.

How do you slow down a door slamming?

Try a few felt pads. Just stick a few small felt pads along the edge of the doorframe: Position a pad at the top and bottom of the frame, along with two more pads at the top and bottom of the strike plate. The pads provide just enough soft cushioning to slow down the door as it closes, preventing a slam.

What is the purpose of adjusting the back check on a door closer?

A backcheck feature set and adjusted by an independent valve. When introduced the backcheck stalls the opening of the door around 70 degrees. When doors are violently opened by pedestrians or wind, the backcheck feature reduces the likelihood of damage should contact be made with an adjacent wall or obstacle.

What does 149 a stand for on door closers?

The number 149 A we find on Door Closers is just a sticker or stamping we find on many of there closers. However, we find it on Yale and Norton Door Closers the most. The sticker or stamping usually says Listed Door Closer 149A. This is the UL number, which is a testing laboratory.

Where is the closer on a Norton Door?

The closer is mounted on the opposite to hinge side frame face, above the door. The arm is attached to the top rail of the door at a right angle to the door. Slide Track Closers: A type of door closer installation. The closer is mounted on either the hinge side or opposite hinge side.

What do you need to know about Norton Door Controls?

Special Templates All Nortondoor closers and door controls are supplied with instructions that show the correct mounting position for the closer and arm in relation to the door, frame and hinges or offset pivots for a variety of door openings. Templates are available upon request for special conditions, such as center pivoted doors.

Where is the closer located on a door?

Top Jamb: A type of door closer installation. The closer is mounted on the opposite to hinge side frame face, above the door. The arm is attached to the top rail of the door at a right angle to the door. Slide Track Closers: A type of door closer installation. The closer is mounted on either the hinge side or opposite hinge side.