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“ latch doesnt latch closed ”

Resolution: Use a normally closed fire alarm as the input to the power supply option board (PS873-2 or PS914-2RS), this will hold the latch retracted. During a fire alarm, the contact will open, dropping...:

What is thermal bow?

Resolution: Thermal Bow is a temporary condition which occurs in metal doors mainly due to the temperature differential from one side of the door to the other. This may occur in exterior doors when direct sun ...:

What is a lock function?

Resolution: Apartment Corridor Lock function is defined as a lock where the latch bolt operated by lever from either side, except when outside lever is made inoperative by a stop or mechanical means other than...:

How do you adjust a door closer?

Resolution: How to: What are the steps to adjust a door closer? Facts: All LCN and FALCON door closers will have 3 regulating valves and a spring adjustment. All closers with a "Del...:

What power supply is needed for EL devices?

Resolution: You can use a Von Duprin PS914 power supply with any of the following option boards depending on the application. 900-2RS board will power 1 or 2 devices that do not require timing from pow...:

Why will my EL 1490 fire my latches but not hold?

Resolution: One of the following items may cause the EL1490 device to retract then release: Incorrect power supply - Verify you have the PS873-2/4TD or PS914-2RS/4RL power supply. Problems with wire gauge...:

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“ latch doesnt latch closed ”

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