Laurence as closer bodies only or as standard packages for center hung and offset door installations.
Concealed overhead door closer installation.
Install arm using 20 x 1 flat head machine screw and washer.
Extended spindles are available 1 2 longer than standard.
Ohc s are divided into three groups.
Install closer into header by inserting tabs into anchor bracket and securing with 2 51 4 20 x 8 pan head screws.
Jackson overhead concealed door closers ohc are available from c r.
Install 13 x.
Cut out must be on the inside of the door.
When the door closer must be concealed above the ceiling or drywall a longer or extended spindle is required.
Usa single acting center hung side and end loading.
The standard packages include the closer mechanism mounting brackets arms and pivots.
Concealed door closers installation instructions properly fitted and adjusted perko perkomatic and powermatic concealed door closers will enhance the safety and comfort of a building for all of its occupants and provide maintenance free service for many years following installation.
Make 2 x cut out in top of door as shown.
Closer adjustment valves must always be accessible.