3M™ Zone Enclosure 8451 InstallationInstructions

April 201478-0015-0552-4-A

Note: Examine box contents and ensure that all necessary components are present and that they are in a usable and defect-free condition.

1.0 General1.1 3M™ Zone Enclosure 8451 is an indoor unit

designed for primary deployment above drop ceilings or below raised floors. The enclosure has a pivoting 19" wide by 4RU tall frame to facilitate equipment mounting and connector access. The frame and enclosure are designed to accommodate various combinations of 3M™ Splitter Modules, 3M™ MPO to SC/APC Fan-out Modules, 3M™ 1RU Rack-mount Splitter Shelves, 3M™ MPO to SC/APC Fan-out Shelves or other passive telecommunications equipment capable of being mounted onto a standard EIA 19" 2 poster rack. Max equipment height cannot exceed 4RU and max depth must be less than 9 inches. The enclosure has six knock outs capable of housing 2.5" conduit and has 12 drill points for additional cable entry-/exit locations. The enclosure is approximately 21" x 21" x 10" and weighs 25 lbs empty. The design and metal construction of the enclosure complies with the intent of Art. 300.22 Sub-clause (B) and (C) of the NEC and may be employed in Air Handling Spaces.

2.0 Kit Contents• Enclosure assembly• 13-position module mounting panel

(Factory Installed)• 2 Heyco metallic liquid tight cordgrips for cable

diameters between .550-.650"• 2 cable clamps• 2 keys• 4 ceiling mount brackets and related hardware• 4 raised floor mounting brackets and

related hardware.

3.0 Enclosure Features

1/4 Turn Keyed Lock (2 supplied)

13 Position Module Mounting Panel

Module Mounting Panel Locking Spring Plunger

Floor Mounting Bracket

Ceiling Mount Bracket

Cable Strain Relief Bracket

Knockout for 2.5” Conduit

Drill Point for Additional Cables

Slack Storage Guide

External Ground Location

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3.1 3M™ Zone Enclosure 8451 Access 3.1.1. Insert supplied key and unlock door by

rotating key 1/4 turn counterclockwise to unlock the enclosure.

3.1.2. Grasp side of the door to open enclosure.

Note: DO NOT use the key to lift door. Doing so may bend or break key into lock and render the enclosure unusable.

3.1.3 Slowly close door when access is no longer required.

3.1.4. Lock the door using the supplied key by turning 1/4 turn clockwise.

3.2 Module Mounting Panel Access 3.2.1. To pivot the mounting bracket, pull the spring

plungers on both sides of bracket.

3.2.2. Pivot the bracket to desired location and release the spring plungers to lock in place.

Note: There are six possible bracket positions indicated by the holes in the side panel.

Note: Door will not close with Module Mounting Panel pivoted forward toward the slack storage area. These locations are for connector access only.

Note: Ability to pivot back will depend on type and size of equipment mounted into the enclosure.

3.2.3. The Module Mounting Panel is secured to the pivot brackets using four 12-24 UNC X 0.5" screws and 12-24 Cage Nuts.

Note: Additional hardware will be required to mount different types of equipment.

3.3 Enclosure Grounding 3.3.1. Enclosure grounding location at rear of box

is designed to accommodate #10-32 UNC x 0.25" long screws. They are spaced .625" apart to fi t a standard 2 lug ground connector.

4.0 Enclosure Installation

To maintain compliance with Art. 300.22, all external cable must be plenum rated with metal external fittings attached to the closure, and the enclosure must be fully shut to protect internal components. You must determine, based on your use and the components you incorporate, whether the final system complies with Art. 300.22

4.1 Under a Raised Floor

4.1.1. Select desired installation location.

4.1.2. Remove tile covering location and tiles adjacent to desired location.

Note: A minimum of one tile location away from walls or other obstructions is recommended for proper door operation.

Note: If necessary, the enclosure may be installed with minimal tile removal, removal of adjacent tiles ensures ease of access and inspection.

4.1.3. Install the four floor mount brackets as shown in section 3.0 using the supplied 10-32 screws and lockwashers. Torque screws to 40-45 in-lbs.

Floor Mount Brackets

4.1.4. Lower enclosure into desired tile location.

Note: Opening the enclosure door and using the inside ledge as a handle may make installation easier.

mWARNING Do not use door as an installation handle.

Note: Floor mount brackets should rest on the floor system posts and not the joists.

4.1.5. Re-install floor tile over enclosure and ensure that the tile lays flat and that the enclosure body is not supporting the tile in any way.

Note: Variations in raised floor system may result in the enclosure body supporting the floor tile. The enclosure is NOT designed to support the weight of individuals or equipment positioned on the floor for any amount of time.

Note: If the covering tile does not lay flat or is in contact with the enclosure, the floor mounting brackets may be removed and the closure allowed to rest directly on the subfloor.

4.1.6. Route and install cables (see section 5 for details) and replace remaining tiles.

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4.2. Suspended Above a Drop Ceiling

Note: The 3M™ Zone Enclosure 8451 is designed to be completely hidden behind a ceiling tile for optimal security and safety.

Note: Mounting hardware and supports are not supplied. Use support struts or NEC compliant support wires. Support wires must be capable of supporting enclosure weight, plus populated items. (Total not to exceed 50lbs.)

4.2.1 Install the four ceiling mount brackets as shown in section 3.0 using the supplied 10-32 screws and lockwashers. Torque screws to 40-45 in-lbs.

Note: Use of Loctite or other thread locking compound is acceptable. Lock washers MUST still be used.

mWARNING Warning: Failure to use lock washers and to properly torque bracket

mounting screws may create a safety hazard.

4.2.2. Determine mounting location for the 3M™ Zone Enclosure 8451 and remove ceiling tiles to aid in installation.

Note: A minimum of two tiles should be removed; however, the installation process can be simplified with the removal of the tiles adjacent to the desired location.

4.2.3. Attach the support wires or threaded rod to the supporting element of ceiling.

mWARNING Insure all support elements are attached in accordance with applicable

NEC standards and local ordinances.

4.2.4. Pass the enclosure through the ceiling opening and rest on suspended ceiling cross members.

4.2.5. Pass supporting wires or threaded rod through mounting bracket holes to support enclosure.

Note: When using support wires pass the wire through the mounting bracket holes, loop back and make several wraps around the wire.

mWARNING Insure all support elements are attached in accordance with applicable

NEC standards and local ordinances.

4.2. 6. Adjust support elements such that the weight of the enclosure is evenly supported by all four units.

Note: Ensure that the enclosure is level and completely above the suspended ceiling. 4.2.7. Ensure that the enclosure door can be

accessed and operated safely. Adjust enclosure position as needed.

4.2.8. Re-install ceiling panels. 4.2.9. Note enclosure location per company

standard.

5.0 Cable Installation5.1 Using Conduit

mWARNING Ensure conduit being used is appropriate for use above ceilings or below

raised flooring and is in accordance with all building and fire codes.

Note: In order to maintain a high level of ingress protection the knock outs are half shear in construction and may be difficult to remove.

5.1.1. Using a hammer or punch remove desired knockout location.

Note: Knockout locations are designed to accommodate 2.5" conduit and related fittings. Drill point locations can be used to create openings in the enclosure for conduits up to 1" in diameter.Note: DO NOT drill holes larger than 1" in diameter at drill point locations. Doing so will void UL Certification as it may create a safety hazard.Note: For ease of access only use cable entry locations in front of module locations. 5.1.2. Install conduit collars and conduit per

manufacturer’s instructions.

mWARNING Insure conduit being used is appropriate for use above ceilings or below

raised flooring is in accordance with all building and fire codes.

5.1.3. Pull cable through conduit and into enclosure per company practice.

5.2 Using Liquid Tight Fitting

5.2.1. Drill a 1" hole at the desired cable location. 5.2.2. Install liquid tight fitting with knurled nut

toward the outside of the enclosure. 5.2.3. Secure to enclosure wall using the supplied

nut. 5.2.4. Pass plenum rated cable through fitting and

tighten nuts.

5.2.5. Strain relieve cable using the supplied hose clamp.

Note: Additional fittings and hose clamps must be purchased separately.

6.0 Grounding6.1 Using Conduit

mWARNING Insure all support elements are attached in accordance with applicable

NEC standards and local ordinances.

External Ground Location

6.2. Attach grounding hardware to cable armor according to manufacturer’s instructions.

6.3. Attach #14 AWG ground wire or equivalent ground braid to cable grounding hardware and route to internal ground stud of enclosure. Tighten supplied locknut to 40 in-lbs.

Internal Ground Location, 1 each sideLocation, 1 each side

Note: There are two internal locations for grounding cables. Consolidate multiple cable grounds as needed.

7.0 Cable Management7.1 The area in front of the module mounting panel is

intended for slack storage.

Cable Strain Relief Bracket(4 ea)

Fiber Guide and Radius ControlModule Mounting Panel

7.2 To avoid patch cord congestion and aid in installation the amount of slack stored inside the zone enclosure should be minimized.

7.2.1. Use of 3M factory-terminated cabling is recommended.

7.2.2. When using field-terminated or bulk cabling slack should be stored outside the enclosure or inside the closet cabinet.

7.3 Route cabling per company practice.

Note: Do not violate cable minimum bend radius specified by cable manufacturer.

3M is a trademark of 3M Company. All other trademarks herein are the property of their respective owners.

Important NoticeAll statements, technical information, and recommendations related to 3M’s products are based on information believed to be reliable, but the accuracy or completeness is not guaranteed. Before using this product, you must evaluate it and determine if it is suitable for your intended application. You assume all risks and liability associated with such use. Any statements related to the product which are not contained in 3M’s current publications, or any contrary statements contained on your purchase order shall have no force or effect unless expressly agreed upon, in writing, by an authorized officer of 3M.

Warranty; Limited Remedy; Limited Liability. This product will be free from defects in material and manufacture for a period of one (1) year from the time of purchase. 3M MAKES NO OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

If this product is defective within the warranty period stated above, your exclusive remedy shall be, at 3M’s option, to replace or repair the 3M product or refund the purchase price of the 3M product. Except where prohibited by law, 3M will not be liable for any indirect, special, incidental or consequential loss or damage arising from this 3M product, regardless of the legal theory asserted.

Communication Markets Division6801 River Place Blvd.Austin, TX 78726-90001-800-426-8688www.3M.com/Telecom

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