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bad back check
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Question
Answer
If I convert from the Von Duprin 88 K (88 rim with 880K trim) to the 373 L trim is a new back plate required?
Resolution:
No, the back plate for 880K-knob trim is the same as for 373L-lever trim. Since 373L is a narrow style trim it require to use the 889 cover plate with this trim.:
Why is a bituminous back-coating used?
Resolution:
Some architectural specifications require steel frames to be back-coated with a bituminous coating for corrosion protection or sound control. It is commonly specified to be used in condit...:
What is the valve on the back of a 4041/4040XP closer used for?
Resolution:
The valve on the back of a 4041/4040XP closer is a "Back Check Selector Valve" that needs to be turned in on "Parallel Arm" mount applications ONLY. If a 4041/4040XP closer mounted "Top Jamb", or "...:
How to test the RX switch in a Chexit device.
Resolution:
Chexit devices shipped prior to 8-24-2015 with solenoid driven: If Chexit device goes into alarm with fast flashing red LED after the rearm time, the RX switch may be out of adjustment or defect...:
Which closer should I use for a "High Wind" condition?
Resolution:
A 4110 with AVB (advance variable back check) would be recommended. Using a SCUSH (Spring Cush) arm will also help minimize shock to all door hardware.:
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 cl...:
Why would the controller on my 4600 (4630/4640) have no lights on display when powered with 120 VAC?
Resolution:
Verify that the 120VAC is present at the controller (measure 120VAC on the 2 wire gray cable from I/O board to controller -- red/black wires in gray cable). If present, but no lights on the contr...:
How do I manually program the AD300 RS-485 Address?
Resolution:
Manually Setting the RS-485 Address This method is only available before the first network communication between an Access Control Panel (ACP) and the lock. Do a Level 1 and Level 2 Factory De...: