door holders buzzing

RELATED FAQS

Question
Answer
Some transformers in the power supplies provide a little humming noise and that is normal. If the humming in Von Duprin PS873 power supply is loud follow these steps. Remove the load from the outp...
If a magnetic lock is buzzing or noisy it could be the result of an AC component riding on the DC supply voltage. Using a meter, check for AC riding the DC level. If possible test the mag lock wit...
Rattling could be caused by improper mounting of the mounting plate or armature. Make sure all components are properly secured.
 AC-voltage or "noise" on a power line can cause hum. Ensure supply is filtered and regulated 12 or 24 volts.Not a transformer.Also ensure hardware is properly secure eliminating the poss...
ST Number Product 1 Product 2 Description ST-2776 4040XP Rw/62A Overhead stop 81, 90, 100, 410, 450 series The standard P...
The SEH is an "electronic holder" (ONLY) that is used to hold open a Fire Rated opening. It requires a door closer to be mounted on the opposite side. It is normally used on an existing opening wit...
ST-1630 is required when mounting a 4041 or 4040XP door closer regular (pull/hinge) side with a concealed GJ100 or GJ410 series over head stop.
The 4330 / 4430 is an obsolete ME closer replaced by the 4310ME or 4410ME Series.
Hold Open Closers & Magnets (Fire/Life safety products) provide a wide range of solutions.  Single or multi-point hold open closers Utilize an electromechanical closer. Hold the door o...
hardware; Suface Holder, Concealed Holder, Over Head Stop