Door Closer Speed Adjustment

Описание: How to install model 351 of the NHN door closer:
1. Assembly: install the main arm according to the direction of door hinges to door closer. According to this, pay attention that adjusting screws of 1 and 2 are always up toward the door hinges.
2. Door closer installing: put the installation template in a proper place with considering weight and dimensions of door, mechanical lock on the door and the installing place of this type of door closer which is two-mode. After putting the installation template in a proper place, adjust the alignment lines at the top of the door and the hinge axis. The location of installation template is the horizontal line corresponding to the top of the door and the vertical line corresponding to the hinge axis. In model 351, the door closer can be installed in two modes by considering the weight and width of door according to the installation template. Therefore, check the information provided in the table in order to correct installation in modes 1 and 2.
Perforate the displayed areas for mounting the screws of door closer and the forearm. Then install the forearm in its place and in a direction specified in the movie. Now, install the main body of the #DoorCloser at the specified place with its special screws and finally, screw the forearm to the right length and attach to the main arm and check the speed of one cycle of complete closing course.
3. Device adjustment:


Lock Types:
The locks are divided into two general categories:
At the right side of the figure, the electric locks include:
Electric clasp gate lock
Electric rim lock
At the left side of the figure, the mechanical locks also include:
Mechanical rim lock
Electric striker lock
Mortice mechanical lock


To utilize from Model 351 of NHN door closer, please make sure that the lock of the door be only from mechanical #lock types such as mechanical rim lock or Mortice mechanical lock. Do not use this door closer for the doors nhnme.com with electric locks.
Before adjusting the door closer, place the forearm at a 90 degree angle to the frame. Adjusting the speed in the first and second stages is carried out with screws 1 and 2, which is decreased by clockwise rotating and increased with counterclockwise rotating.
3. How to close the door: in two-stage NHN door closers, the closing process includes two stages of speed and reduced speed. Note that in mode 1, the maximum angle of opening is 110 degrees and the amount is 100 degrees for mode 2. The first stage is from complete opening up to the last 15 degrees and the second stage is the last 15 degrees.

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