Q: Latch only releases for a second i replaced the potted circuit breaker and the solenoid and plunger
A: Please contact Von Duprin Technical support directly.
Please let us know if there is anything else we can help with.
Q: I am head of maintenance at a hotel in the Atlanta area. We have what I believe to be a Von Duprin brand push-bar door, 33A/35A series, with electric latch retraction option. Normally, on our doors which are functioning properly, low voltage activates the solenoid/plunger and retracts the latch for approximately 5 seconds. On my problem door, the latch is only retracting for 1 second at most, not allowing enough time for someone to pull and enter the door. While troubleshooting, I tested a cardreader and potted circuit breaker from a working door and neither affected the latch retraction time. I also tried adjusting the dogging rod longer and shorter, but also got no effect. Can you please offer any advice on what may be causing this particular problem?
A: Have you checked and confirmed the power supply is providing the solenoid an adequate amount of current when it is actuated? Please do so and report back.
Q: Yes, I'm getting 25 volts.
A: Although the manufacturer has stated that the solenoid is rarely the cause of issues, they have provided the following ohm value for the 99 series exit device as follows:
Green/Yellow: 1.2 - 2.2 O Green/Orange: 112 - 130 O Q: Should there be a reading across yellow/Orange?
A: What are you wanting to measure?
Q: The answer to one of the previous question states that Green/Orange: 112 - 130 O. But the guy in the video said that its between 110 - 130 O. So which is it, 110 or 112 ohms? Because the reading Im getting is 111.2 ohms. So, in my case, knowing the correct number will determine if I need to spend the $400 for this solenoid or not. Thanks
A: The Ohm value, just like voltage, would be a range. If you are measuring 111.2 ytou are within the range. Having said this, you should order shelf stock while I still have these in stock as these are discontinued when inventory runs out.
Q: What is the proper term for the component of the solenoid that moves when power is applied across the coil? Images here:
View Image
View Image
A: This item is referred to as the "plunger".
Q: Is there a troubleshooting guide for Von Duprin Electric Latch Retraction devices?
A: Sure is and this troubleshooting guide can be seen here:
Click Here
Q: How do I check the voltage at the solenoid?
A: The steps to check the voltage at the solenoid are straight forward and here they are:
1) Disconnect pulse width module (PWM) from solenoid. Current version of PWM is yellow; older version is black.
2) While providing input signal to power supply, measure voltage from PWM (LED on PWM should flash once).
3) Approximate readings for yellow module should be (for accuracy, do not touch meter probes):
^^ Green/Yellow: 22.6VDC (older black modules should measure 0VDC after .3 seconds)
^^ Green/Orange: 24VDC (older black modules should measure same)
4) If voltage reading is improper, use a different PWM (part number 050534) and/or continue metering connection points (e.g., power transfer) to determine if there is a faulty connection.
Q: How do I check why the solennoid is not retracing?
A: Be sure you are using the correct power supply and output terminals.
Please note the EL solenoid power requirements: 24VDC +/- 10%; 16 amp inrush (.3 seconds), .25 amp holding.
Confirm you have the correct power supply. The required Power Supply x Option Board: PS914 (green mother board) x 900-2RS or 900-4RL (or may use discontinued PS873).
Please note: the input from Access Control to be Normally Open dry contact.
Please also note power supplies manufactured by third parties have not been tested and may not allow for proper performance of the EL solenoid.
If all of the above are verified, please refer to the troubleshooting guide as seen here:
Download File
Q: How do I adjust the solenoid plunger on my Von Duprin electric latch retraction exit device?
A: Adjusting the solenoid plunger on your Von Duprin electric latch retraction exit device is not uncommon and in fact often improves performance.
Loosen black 3/32” socket head cap screw on plunger. Back out brass threaded bushing (with 3/8” wrench) until plunger holds when power is applied. Then test with device cover plate installed since it can impact operation. Please review the Von Duprin Electrical Options Booklet, document #24228413 as seen here:
Download File
Q: What wire gauge is required for the Von Duprin 050535 solenoid?
A: The VON DUPRIN 050535 EL Solenoid/Plunger
requires the use of:
14AWG at 100 feet maximum and 12AWG if over 200 feet maximum