what is preload

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The Benchmark III control has a 24VDC, 2.5 amp power supply, and built in relay for controlling electric strikes or other accessories less than 2.5 amps current load. For a fail secure strike, r...
The 4040XP is the replacement for the 4040/4041 closer. It is basically the same closer as the 4040/4041 closer in shape and function. It has been internally modified to increased the pinion size a...
The following items are needed for Spec Writers to write a door and hardware specification  Building code being used Occupancy type or types Occupancy load for any rooms or areas of ass...
Followings could cause the PS914-2RS power supply to cycle on and off: Wrong gauge wire or run distance from power supply to the EL device. Click HERE for wiring requirements Over load  to the ...
 See the attached Technical Note for instructions on saving a "Device Template" FROM a device or loading TO a device, Device Template Tech NoteOn the SUS/HHD go to the LOCK Properties tab, and sele...
Low friction, high load needle bearings found in all LCN closers
If PS914 is not providing any DC output, remove the load from DC output, turn the AC off then reapply the AC after a few seconds.
The L-Series doors are designed for virtually all construction requirements in commercial building applications. They have also been tested and approved for uniform wind load per ASTM E330.  ...
The Hand Held device (HHD) should not be loaded with more than 100 door files at a time.  The Schlage Utility Software has difficulty managing larger numbers of door files.
For best Schlage Utility Software (SUS) and Hand Held Device (HHD) performance do not put more than 100 door files at a time ....
If the closer arm is touching the door, it is because the arm or the closer body is not templated correctly. Confirm dimensions are taken from the proper location and make corrections if needed. 
The maximum door width that pivots have been tested is a 4' wide door.  Any door greater than 4' would shorten the life of the pivots. There is no maximum door height, for offset pivots the ru...
Butt hinges can be used on  doors up to 4' wide and 200 pounds.  There is no maximum door height, just need to add a hinge for every 30" or part there of over 7'.
The following items may cause the  PS900 series power supply to have no DC output voltage. 1. If  the DC voltage selection jumper is missing, the power supply will not provide any D...
For any CO-200-40 Privacy or CO-220-75 Safe School lock that was manufactured before May 2014: When updating the lock's firmware to CO.A.12 or later, SUS will first ask the question “Is this a CO-...
Ensure the end user is using the latest version of the Schlage Utility Software application.
When the GWES error occurs, RESET the Hand Held Device using the RESET button under the battery cover.  After RESET of the Hand Held Device (HHD), the error will be gone.
Attached table provides how long the battery back up will last with a PS914 power supply. Load (Amp DC) Battery backup time Comments 0.3 Amp 20 hours Continuous load ...
Current production GF3000 have a fixed , solid coil. Previous models excluding the BRD had spring load floating coils. This allowed the coil to drop and meet the armature, Engineering is reviewing ...
For Potted Modules shipped before August of 2012, you can test by applying power to the potted circuit breaker to and if good the following voltages will be seen: 23-24V DC on the gree...
The 4600 Series operator has both a 12VDC and 24VDC output rated at 1A (combined load) to power strikes, maglocks, and other devices, but an EL device "always" has to have a separate PS914-2RS Seri...
Blast and pressure resistant doors protect people and property from explosions and shrapnel. More damage is generally caused by shrapnel than the blast itself, and a properly specified and engineer...
Steelcraft Blast Resistant Assemblies meet the following Blast Test Standards:                    ...
The use of Panic Hardware and/or Fire Exit Hardware is required by the International Building Code (IBC) and NFPA 101 – The Life Safety Code, depending on which code and which edition of the code i...
Following could cause the fuse to blow in Von Duprin PS873 power supply. PS873 power supply provides 2AMP at 24VDC or 4AMP at 12VDC. If this limit is exceeded the fuse will blow in the power sup...
Purpose: When there is concern for the weight of overhead wall construction, or, when multiple surface applied hardware components are being used. This continuous channel has the ability to spre...
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...