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Dorma ED100/ED250: Push Arm Install & Spring Tension Guide

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Chapter 11: Push Arm Installation

Notice Reference Chapter 7 – Installation templates for specific positioning measurements.

11.1 Push Arm Assemblies

The system supports standard and deep push arm configurations.

  • Fig. 11.1.1: Push arm assemblies (Standard and Deep)
  • Fig. 11.2.1: Push arm assembly, 8.75" [225mm] (DC4677-01X)
  • Fig. 11.2.2: Deep push arm assembly, 19 11/16" [500mm] (DC4677-02X)

Components Key:

  • 1: Splined drive arm
  • 2: Socket
  • 4: Adjustment arm 11 1/4" [285mm]
  • 5: Adjustment arm tube 12 1/4" [311mm]
  • 6: Shoe
  • 7: M6 x 10 mm flanged button head screw
  • 8: Ball head
  • 9: Adjustment arm, 17 3/4" [450mm]
  • 10: Adjustment arm tube, 17 3/4" [450mm]
  • 11: Shoe screw cover
  • 12: M8 x ___ SHCS
  • 13: Cap

11.2 Push Arm Installation Steps

11.2.1 Attach Drive Arm to Operator

Caution: Door must be fully closed! Caution: ED operator axle closed position. In order to mount the drive arm in the correct position, the axle must be at the closed position.
Warning Use caution when working in proximity of door and push arm!
  1. Set ED50/ED100/ED250 operator spring tension based on width of door (See Chapter 12).
  2. Insert axle extension into drive arm.
  3. Move arm to ED50/ED100/ED250, inserting arm into axle extension sleeve at a 90° angle to operator.
  4. Thread SHCS into ED50/ED100/ED250 spindle and tighten.
Caution Use torque wrench with hex key socket to tighten SHCS to 26 ft-lb [35.3 Nm].

11.2.2 Drill Holes in Door for Adjustment Arm Shoe

Installation templates (Chapter 7) document location of shoe on door.

  1. Drill two holes in door for adjustment arm shoe. Fastener type depends on door material.
Tips and Recommendations Reference Chapter 2 for arm fasteners.

11.2.3 Secure Adjustment Arm Assembly to Door

  1. Fasten adjustment arm assembly to door (Fig. 11.2.6).

11.2.5 Connect Adjustment Arm to Drive Arm

  1. Loosen the two adjustment M6 x 10 mm flanged button head screws.
  2. Using a square, position adjustment arm assembly at a 90° angle to the door.
  3. Rotate drive arm and adjust length of adjustment arm until drive arm ball head (8) is aligned with adjustment arm socket (2).
  4. Insert adjustment arm ball head (8) into drive arm socket (2). The spring in the socket will retain the ball head.
  5. Secure adjustment arm position by tightening the two M6 x 10 mm flanged button head screws.
Caution Maintain adjustment arm assembly at a 90° angle to door. Recheck after tightening.

11.2.4 Install Shoe Fastener Covers

  • Install two shoe fastener covers (11).

Chapter 12: ED50/ED100/ED250 Operator Spring Tension

12.1.1 Spring Tension Setting Revolutions

Use the table below to determine the required spring tension revolutions based on door width.

Spring Tension Settings by Door Width
Door Width (Inches) 28" 32" 36" 42" 48"
Door Width (mm) 711 813 914 1067 1219
ED50 10 10 14 16 18
ED100 10 10 14 16 18
ED250 10 10 14 16 18

12.1.3 Spring Tension Adjustment

Spring tension adjustment is factory set fully CCW (no spring tension). It must be pre-tensioned before operation.

  • 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.

12.1.4 Check Door Closing Force

  1. Use a pressure gauge to check door closing force at 2°.
  2. Adjust tension setting if necessary.
Tips and Recommendations System checks spring tension during learning cycle. Learning cycle will be canceled if spring is insufficiently tensioned. Door will stop and display will show a rotating "0" and an "F".

Chapter 13: ANSI/BHMA Standards

13.1 A156.10 Power Operated Pedestrian Doors

Reference key parameters for ED100/ED250 compliance with ANSI/BHMA A156.10.

Parameter Function Factory Setting Range Requirement / Notes
So Opening speed (automatic) 25°/s ED100: 8-50°/s
ED250: 8-60°/s
Opening time to 80° not less than 1.5s.
Sc Closing speed (automatic) 25°/s ED100: 8-50°/s
ED250: 8-60°/s
Closing time to latch check reference 28.1.2.
Fo Static force (opening) 13.5 lb f [60 N] 4.5 - 33.7 lb f Not to exceed 30 lb f measured 1" from lock edge.
Fc Static force (closing) 13.5 lb f [60 N] 4.5 - 33.7 lb f Not to exceed 30 lb f measured 1" from lock edge.
bc Back check 10° 5° - 40° Shall occur at no less than 10° of full open.
dd Hold open time 5 s 0 - 30s Min 1.5s after loss of detection.

13.2 A156.19 Low Energy Power Operated Doors

Parameters for low energy operation.

Parameter Function Factory Setting Requirement
So Opening speed 17°/s (Max 27°/s L.E.) Open from closed to back check/80° in 3s or longer.
Sc Closing speed 17°/s (Max 27°/s L.E.) Close from 90° to 10° in 3s or longer.
dd Hold open time 5 s Not less than 5s (3s for push-pull).
Fo/Fc Static force 13.5 lb f [60 N] Stopped door force not to exceed 15 lb f [67 N].

13.2.2 Minimum Opening/Closing Times (Table I)

Door Width "D" Weight 100lb [45kg] Weight 125lb [57kg] Weight 150lb [68kg] Weight 175lb [79kg] Weight 200lb [91kg]
30" [762mm] 3.0s 3.0s 3.0s 3.0s 3.5s
36" [914mm] 3.0s 3.5s 3.5s 3.0s 3.0s

Chapter 14: Install Door Signage

Install applicable door signage as outlined in Chapter 6, ED50/ED100/ED250 door signage.

Chapter 15: Cover, End Caps and Spindle Caps

Cover and end caps will be installed after ED50/ED100/ED250 operator setup is completed.

Reference ED50/ED100/ED250 Setup and Troubleshooting Manual DL4617-002.
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