68
ED900
02-2020
08125330
dormakaba ED900 Installation Instructions – Double egress door
Chapter 19
19.1 Set ED900 operator spring tension
19.1.2 Operator spring tension function.
1. Spring tension sets closing force on door.
2. Required spring tension is based on door width.
19.1.3 Spring tension adjustment.
Spring tension adjustment required for both ED900
operators.
1. Spring tension adjustment is factory set fully CCW,
no spring tension.
2. Spring must be pretensioned per Para. 19.1.1.
• Use 5 mm T-handle hex key (Fig. 19.1.2).
Clockwise - increases spring tension.
Counterclockwise - decreases spring tension.
CAUTION
A minimum of ten spring tension revolutions
are required to operate system.
CAUTION
Any change to spring tension setting requires a
new learning cycle (Chapter 23)!
Fig. 19.1.1 Spring tension adjustment
Door width
Inches
32
36
42
48
mm
813
914
1067
1219
Spring setting
revolutions
ED900
10
14
16
18
19.1.1 Spring tension setting revolutions.
TIPS AND RECOMMENDATIONS
System checks spring tension during learning
cycle (Chapter 23).
Learning cycle will be canceled if spring is
insufficiently tensioned; door will stop and
display will show a rotating "0" and an "F".
19.1.4 Check door closing force.
1. Para. 19.1.1 lists approximate spring tension settings.
2. Use pressure gauge to check door closing force at 2°
and adjust tension setting if necessary.
Fig. 19.1.3 Door pressure gauge
TIPS AND RECOMMENDATIONS
Reference Chapter 30, ANSI/BHMA standards
for door closing forces.
1
Spring tension
adjustment
Fig. 19.1.2 5 mm T-handle hex key
19 Operator spring tension
+
-
