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11. Operator Spring Tension Adjustment
For ED50, ED100, and ED250 Surface Applied Operators
11.1 Set ED50/ED100/ED250 Operator Spring Tension
11.1.1 Spring Tension Setting Revolutions
Determine the required spring tension setting based on your door width and operator model.
| Door Width | Spring Setting Revolutions | ||
|---|---|---|---|
| Inches | mm | ED50 / ED100 | ED250 |
| 28" | 711 | 10 | 10 |
| 32" | 813 | 10 | 10 |
| 36" | 914 | 14 | 14 |
| 42" | 1067 | 16 | 16 |
| 48" | 1219 | 18 | 18 |
| 55" | 1400 | N/A | 24 |
| 63" | 1600 | N/A | 24 |
11.1.2 Operator Spring Tension Function
- Spring tension sets the closing force on the door.
- The required spring tension is directly based on the door width (see Table 1).
11.1.3 Spring Tension Adjustment
The spring tension adjustment is factory set fully Counterclockwise (CCW), meaning there is initially no spring tension.
Instructions:
- The spring must be pre-tensioned per the values in Paragraph 11.1.1.
- Use a 5 mm T-handle hex key.
- Clockwise: Increases spring tension.
- Counterclockwise: Decreases spring tension.
⚠️ CAUTION
A minimum of ten (10) spring tension revolutions are required to operate the system.
11.1.4 Check Door Closing Force
- Refer to Paragraph 11.1.1 for approximate spring tension settings.
- Use a pressure gauge to check the door closing force at 2°.
- Adjust the tension setting if necessary.
💡 Tips and Recommendations
- Reference Chapter 12, ANSI/BHMA standards for specific door closing forces.
- The system checks the spring tension during the learning cycle (Reference ED100/ED250 Setup Manual).
- The learning cycle will be canceled if the spring is insufficiently tensioned. The door will stop, and the display will show a rotating "0" and an "F".