74
ED50
08-2018
DL4614-140
dormakaba ED50 OHC Installation Instructions
Chapter 30
30.7 Set power fail closing speed
1
Power fail closing
speed potentiometer
2
Control board
3
Power switch
Fig. 30.7.1 Power fail closing speed potentiometer, ED50 operator on RH side of header
30.7.1 Power fail closing speed
potentiometer.
• Single turn
• Factory setting: fully CCW
• CCW increases closing speed.
• CW decreases closing speed.
• 3/32" [2-3 mm] flat blade screwdriver
required for adjustment.
30.7.2 Setting door closing speed upon
power failure.
1. Turn ED50 power switch OFF.
2. Manually open door to 90° angle and let
it close.
3. If door closes in less than 3 seconds, turn
potentiometer 1/4 turn CW and retry
test.
TIPS AND RECOMMENDATIONS
Total door closing time from full
open to fully closed should not be
less than 5 seconds.
Reference Chapter 36; ANSI/BHMA
standards.
NOTICE
It is imperative that this door closing
time be set.
If door closes in less than three
seconds, error message
E 73
(System error 3, braking circuit) will
be displayed.
Reference Appendix B,
Troubleshooting.
1
1
2