Von Duprin 7847 Series Concealed Vertical Rod Exit Device Installation Instructions

Screw Chart

This chart details the screws used for various installation scenarios.

Diagram Descriptions for Screw Chart:

• Type A: Shows screws #10-24 x 1" and #10-24 x 1-1/2" for surface mount/sex bolts on 1-3/4" and 2-1/4" doors. Also shows #10-24 x 3/4" and #10-24 x 1" screws for 785 trims on 1-3/4" and 2-1/4" doors.
• Type B: Shows screws #10-24 x 3/4" and #10-24 x 1-1/8" for surface mount/sex bolts on 1-3/4" and 2-1/4" doors.
• Type C: Shows a #10-16 X 3/8" thread cutting screw for the end cap.
• Type D: Shows a #10-32 X 1/4" screw for the bracket to latch.
• Type E: Shows a #10-24 X 1/2" screw for the bracket to door.
• Type F: Shows a rod adjusting screw and a retaining clip.
• Type G: Shows a #8-32 X 5/16" screw for a retaining clip.
• Type H: Shows a #10-24 X 1/2" screw for the 338 strike.
• Type I: Shows a #10-24 X 1-1/2" screw for the ratchet release.
• Type J: Shows a #8-18 x 3/8" thread cutting screw for the center case cover.

Door Preparation Chart

This section details the necessary preparation for the door before device installation.

• Center case - 4 holes: Diagram shows a door edge with four holes marked for the center case. It specifies measurements for surface mount (using #25 drill and #10-24 tap) and sex bolts (using 1/4" drill for the device side and 13/32" drill for the trim side). Notes indicate these preparations are required on Hurricane (HH) devices.
• End cap bracket - 2 holes: Diagram shows a door edge with two holes marked for the end cap bracket, with similar drilling and mounting instructions as the center case. It notes that these preparations are required on Hurricane (HH) devices and that holes should be prepared after the lock side of the device is mounted and the hinge side is an equal distance to the bottom of the door.
• Ratchet Release Hole: Diagram shows a door edge with a 1/2" diameter hole drilled on the inside face of the door for the ratchet release. Specific stop height dimensions (11/16", 13/16", 15/16") are provided with corresponding measurements (1/2", 5/8", 3/4"). Reinforcing may be required.
• Door Cut-outs: Diagram illustrates door cut-outs for outside cylinder and trim applications. It shows how to mark and cut for metal doors (device side) and wood doors (through). It also notes to trace cut-outs from a plastic template for 7847, 7847-F, and HH7847 devices (device side only).
• Latch Cases (Drill top and bottom of door): Two diagrams show drilling for latch cases at the top and bottom of the door. The 'HH / Fire Device' diagram shows dimensions for a 1-3/4" door, including 1-5/8" and 1-9/32" measurements for the latch case and a 7/16" hole for #10-24 tap. The 'Panic device' diagram shows similar dimensions for a 2-1/4" door.

Hurricane Rated Device Requirements

When installing a Wind and Impact-rated hurricane device (HH), sex bolts must be used. Sex bolts are noted throughout the instructions where applicable. If through-bolting trims are used, these trims are equivalent in function and are used in place of sex bolts.

Device Installation Steps

1. Draw Horizontal Device Center Line: Diagram shows a door with a horizontal center line marked, indicating the correct placement for the exit device. A vertical measurement from the finished floor (39-5/8") is shown. (RHR shown, LHR opposite).
2. Determine Correct Backset, then Mark 4 Holes for Device Center Case Using Template: Mark centerline using measuring tape. Place template on centerline mark. Two diagrams illustrate marking four holes for the device center case using a template. One shows markings for the 7847 (non-fire rated) with a 2-3/16" backset, and the other for the 7847-F (fire rated) or HH7847 (hurricane rated) with a 2-3/4" backset.
3. Prepare Door per Preparation Chart on Page 3: Follow the instructions and diagrams on page 3 for door preparation. See trim instructions for pull side door preparation; the X-X line in trim instructions is the same as the device center line.
4. Adjust Tailpiece if Needed: Make sure the tailpiece is installed at the correct length for a 1-3/4" thick or 2-1/4" thick door. If necessary, remove the pine tree clip, rotate the tailpiece, and reinstall the pine tree clip. Diagram shows a tailpiece, pine tree clip, and door thickness (1-3/4" or 2-1/4"), illustrating how to adjust the tailpiece length.
5. If Using a Cylinder, Remove Cam and Rotate 180°: The cam must be in the position shown with the key removed. If necessary, remove cam screws, place the cam in the correct position, and reinstall cam screws. Diagrams show the standard orientation with the key removed, and how to rotate the cam if necessary. It also notes a different orientation for NL and E-trims.
6. If Necessary, Install Cylinder: Diagrams show two different cylinder lengths (1-1/8" to 1-1/4" and 1-3/8" to 1-1/2") corresponding to door thicknesses.
7. If Using a Cylinder with a Tailpiece, Prepare Device and Cylinder: Install the tailpiece guide. The trim output tailpiece is then installed. Diagram shows the installation of a tailpiece guide and the trim output tailpiece onto the device.
8. Assemble Rods and Latches and Adjust Length for Proper Door Height: Follow red and blue instruction cards on rods to set initial rod length. Diagram illustrates assembling rods and latches, showing 'Top length' and 'Bottom length' adjustments by threading the latch in or out of the rod. Fine-tune the overall length by threading the latch in or out of the rod.
9. Install Rods and Latches as Shown: Diagrams show the top and bottom rods with latches being installed, connecting to the device mechanism. It notes that Fire/HH devices use brackets on both sides of the latches. The device alignment with pre-prepared mounting holes is indicated.
10. Secure Device to Door as Shown, then Hang Door on Frame: Use screws from the "Screw Chart" (page 2) for attachment. A 2" minimum clearance note is included, with a reference to "Cut Device" on the back cover if the device is too long. Diagram shows the device being secured to the door with screws and the door being hung on the frame. It also shows the device being equal height to the bottom of the door on each end.
11. Install Top Strike and Ratchet Release: Diagrams illustrate the installation of the 338 Top Strike and the Ratchet Release mechanism. It references "Frame Preparation" (page 7) for cut-outs and holes. It also shows the use of a shim (if needed) and a spacer (for frames without a door stop).
12. Install Bottom Strike or Prepare Threshold: Diagrams show the 385-A bottom strike installation and threshold preparation. It includes details for a 1/4" undercut for the 7847, threshold applications with dimensions (e.g., 1-1/8" latch case, 3/8" stop, 9/16" R max., 3/32" stop), and flat threshold applications. It also covers hurricane applications using a 304L bottom strike.
13. Adjust Rods and Install Center Case Cover: Refer to "Adjust Rods" on page 7 for the adjustment procedure. Remove protective film from the pushbar before installing the center case cover. Diagram shows the center case cover being installed over the adjusted rods.

Adjust Rods

Follow these steps to adjust the rods for proper operation.

1. Open door and release top latch bolt as shown (Figure 1).
2. Loosen bottom locking screw (Figure 2).
3. Disconnect bottom vertical rod by removing the bottom adjusting screw.
4. Loosen top locking screw.
5. Rotate top adjusting screw clockwise until the top latch bolt is fully extended (Figure 1).
6. Check top latch bolt for deadlocking (latch bolt should not push in).
7. Turn top locking screw in. Do not over-tighten.
8. Depress pushbar and release.
9. Make sure top latch bolt stays retracted as shown (flush with latch case) (Figure 3).
10. Install bottom adjusting screw through bottom rod (Figure 2).
11. With the top latch bolt still retracted, adjust the bottom rod so the latch bolt clears the floor and bottom strike (Figure 4).
12. Turn bottom locking screw in. Do not over-tighten.
13. Check device operation by opening and closing the door several times from the outside.

Redo adjustment procedure if:

• Top latchbolt is not held retracted.
• Bottom latchbolt does not clear floor and bottom strike.

Diagram Descriptions for Adjust Rods:

• Figure 1: Shows the top latch bolt fully extended.
• Figure 2: Illustrates the location of the top and bottom locking screws and the bottom adjusting screw.
• Figure 3: Shows the top latch bolt retracted and flush with the latch case.
• Figure 4: Depicts the bottom latch bolt clearing the floor and strike.

Frame Preparation

Detailed instructions for preparing the door frame.

Top Strike

Diagram shows detailed measurements and hole placements for preparing the door frame for the top strike. Includes dimensions for single and double door applications, and references to the edge of the stop. Dimensions include 1" min., 1/8", 13/16", 1-5/8", 13/32", and 1-7/8". For double door applications, it shows latch bolt positions for RHR and LHR doors with measurements like 1-5/16", 21/32", 15/16", and 1-7/8".

Ratchet Release

Diagram shows detailed measurements and hole placements for preparing the door frame for the ratchet release. It includes drilling and tapping holes (#25 drill, #10-24 tap, 2 places) at 9/16" and 1-1/8" centers. It notes that reinforcing is required and the plunger must go through the hole in the door. Adjustment should be made so the plunger releases the latch bolt when the door is closed.

Optional Equipment - CD (Cylinder Dogging)

Instructions for Cylinder Dogging.

1. Remove mortise cylinder cam and reinstall in reverse (Figure 6).
2. Insert key and rotate cam to install the cylinder to the cover plate (Figure 7).
3. Remove key to slide cover plate in position in the mechanism case.

Dogging procedure: Turn cylinder key clockwise approx. 1/8 turn for standard dogging.

Diagram Descriptions for Cylinder Dogging:

• Figure 6: Illustrates the CD function conversion, showing the mortise cylinder, cam, and dogging plate.
• Figure 7: Shows the installation of the cylinder, including the offset toward the pushbar, cylinder locating washer, cylinder collar, and cylinder lock nut within the mechanism case.

Cut Device

Instructions for cutting the device if necessary.

1. Measure amount to cut off device: Ensure the device is aligned with mounting holes. A 2" minimum clearance (with endcap removed) is noted. If a 5/8" diameter wire access hole has been predrilled in the door, cut the device 5/16" from the center of that hole.
2. Tape and mark area being cut: Remove the anti-rattle clip and tape the area to be cut, ensuring the cover plate remains flush to the pushbar.
3. Cut device square: Cut the device square and remove all burrs. Note: The device must be cut square for proper end cap fit.
4. Slide anti-rattle clip into device: Slide the anti-rattle clip into the device, ensuring at least 2" of clearance.