Emerson Knurr DCM User manual

Integrated Cabinet Solutions
For Business-Critical Continuity™
Knurr®DCM™Rack
User Manual

IMPORTANT SAFETY GUIDELINES
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be closely followed during installation and
maintenance of this unit. Read all safety instructions before attempting to assemble and install the
Knurr DCM. Adhere to all warnings on the unit and in this manual. Follow all instructions.
Read all warnings, cautions and instructions in this before attempting to move, lift, remove packaging
from or preparing unit for installation.
This product is designed for commercial / industrial use only. This product is not intended for use
with life support or other U.S. FDA designated “critical” devices. Maximum load must not exceed that
shown on the Knurr DCM rating label.
Operate this product in a clean, indoor environment that is free of moisture, flammable liquids, gases
and corrosive substances.
Ensure that the Knurr DCM has proper ventilation. Never block or insert objects into the ventilation
holes or other openings. Maintain a minimum clearance of 12 inches (305mm) in front, rear and top of
the Knurr DCM for proper air flow and cooling.

i
TABLE OF CONTENTS
1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.1 Feedback on Equipment, Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.0 MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2.1 Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2.1 Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2.2 Side Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.3 Mounting Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 Required Setup Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.3 Unloading the Knurr DCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.4 Equipment Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.5 Basic Hardware Installation—Nutbars and Spring Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.5.1 Inserting a Nutbar or Spring Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.6 Frame and Enclosure Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.6.1 Internal Mounting Rails. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.6.2 Front- and Rear-Mount Rails—Position and Attach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.7 Door—Remove and Reverse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.7.1 Remove the Door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.7.2 Reverse the Door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.7.3 Reverse the Door Handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.8 Side Panels—Remove and Replace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.8.1 Remove a Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.8.2 Replace a Side Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.0 OPTIONS—INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Anti-Tilt Kit (Part # 540254G1L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 1U Tool-Less Fixed Shelf Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 1U Tool-Less Telescopic Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 2U Locking Drawer Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5 Power Distribution Unit Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.5.1 Install Tool-Less PDU Mounting Brackets—700 and 800mm Cabinets Only . . . . . . . . . . . . 16
4.5.2 Full-Height PDU Mounting Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6 Install RPC™ BDM™ Mounting Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.7 Tool-Less Blanking Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.8 Cluster Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.8.1 Connect Two Racks Using the Tool-Less Cluster Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.8.2 Connect Two Racks Using the Factory-Installed Cluster Tab. . . . . . . . . . . . . . . . . . . . . . . . . 20
4.9 Cable Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.10 Cable Access—Top Cover, Back and Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

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4.11 Top Cover Cable Management Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.11.1 Internal Cable Management Troughs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.11.2 1U Cable Routing Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.12 Attach Cable Management Option—Cable Fingers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.12.1 Install a Liebert MB Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.1 Periodic Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
7.0 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
FIGURES
Figure 1 Side panel lock components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 2 Knurr DCM as shipped. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 3 Removing rack from shipping pallet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 4 T-slot configuration and nutbar. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 5 Insert nutbar or spring nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 6 Vertical rail repositioning—600mm cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 7 Vertical rail repositioning—700 and 800mm cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 8 Door hinge removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 9 Anti-Tilt Legs installed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 10 1U tool-less fixed shelf installation point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 11 1U tool-less telescopic shelf installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 12 Locking drawer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 13 Small PDU mounting bracket on rack frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 14 Full-height PDU mounting brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 15 RPC BDM mounting brackets and fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 16 Installing tool-less blanking panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 17 Cluster connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 18 Top cover for Knurr DCM cabinets 42U and 45U high . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 19 Dress panels along edge of cluster of Knurr DCMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 20 Internal cable trough installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 21 1U Cable Routing Panel installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 22 Cluster cable routing components—assembled and installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 23 Liebert MB mounting brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 24 Liebert MB mounting bracket inserted into Knurr DCM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 25 Knurr DCM model numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
TABLES
Table 1 Rack dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2 Door dimensions, single door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 3 Door dimensions, split door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 4 Optional side/partition panel sizes and part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5 Knurr DCM quick-ship part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 6 Accessories part numbers and descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Introduction
1
1.0 INTRODUCTION
The highly versatile Knurr DCM provide an organized, secure, controlled environment in a single
system for sensitive electronic equipment.
The Knurr DCM is available in three heights—24U, 42U and 45U (47", 78.5" and 83.9"; 1196mm,
1996mm and 2131mm). Those cabinet heights are available in these widths and depths:
Assembly instructions in this manual cover the various configurations of the Knurr DCM, either a
single rack for simple equipment organization or a suite of Knurr DCM racks.
1.1 Feedback on Equipment, Instructions
Emerson Network Power is highly interested in providing high quality equipment and clear, concise
instructions on installing and using the Knurr DCM and its optional equipment. If you have any
comments about the rack, its options or instructions, visit
www.emersonnetworkpower/DCMfeedback
Table 1 Rack dimensions
Rack
Size
Dimensions, in (mm)
Height Width Depth
Frame Only W/ Leveling Feet W/ Casters W/O Sides W/ Sides W/O Doors W/ Doors
24U 46.0 (1168) 46.6 (1186) 47.1 (1199) 23.3 (591) 23.6 (600) 38.8 (986) 39.4 (1000)
42U 77.5 (1968) 78.1 (1986) 78.6 (1999) 27.2 (691) 27.6 (700) 42.8 (1086) 43.3 (1100)
45U 82.8 (2103) 83.4 (2121) 83.9 (2134) 31.1 (791) 31.5 (800) 46.7 (1186) 47.2 (1200)
Height, width, and depth dimensions are independent

Major Components
2
2.0 MAJOR COMPONENTS
A Knurr DCM may have any or all of the components addressed in this section, depending on its
configuration.
2.1 Frame
The base of all Knurr DCM products is the frame. The Knurr DCM features a fully assembled,
extruded aluminum frame with a patented T-slot that permits many of the cabinet’s tool-less
mounting features.
The racks can accommodate shelf- or rack-mounted equipment on 19-inch (483mm) adjustable rails.
See Knurr DCM model numbers on page 28 and illustrations for measurements of different
models.
Cutouts in the top covers permit customer cable entry. The top of the Knurr DCM also is drilled for
mounting a Liebert XDV top-mount cooling unit.
2.2 Enclosure
Exterior components of the Knurr DCM are painted black (RAL 7021)
2.2.1 Doors
All doors are framed from sheet metal and have hexagonal perforations leaving 83 percent of the door
open to airflow for efficient cooling. A two-point latch and push button lock come standard.
Doors are available in single- or dual-door designs for easier access. All doors are removable and
single doors are designed for reversible (left/right) hinging (see 3.7.1 - Remove the Door and 3.7.2 -
Reverse the Door). Each type of door swings 135 degrees. Each door is perforated; each is available
in RAL 7021, matching the rack
Doors are available in these styles and sizes:
• 1200mm x 600mm, single, Part # 538444G1L
• 1200mm x 600mm, split, Part # 539273G1L
• 1200mm x 700mm, single, Part # 538444G2L
• 1200mm x 700mm, split, Part # 539273G2L
• 1200mm x 800mm, single, Part # 538444G3L
• 1200mm x 800mm, split, Part # 539273G3L
• 2000mm x 600mm, single, Part # 538444G4L
• 2000mm x 600mm, split, Part # 539273G4L
• 2000mm x 700mm, single, Part # 538444G5L
• 2000mm x 700mm, split, Part # 539273G5L
• 2000mm x 800mm, single, Part # 538444G6L
• 2000mm x 800mm, split, Part # 539273G6L
• 2100mm x 600mm, single, Part # 538444G7L
• 2100mm x 600mm, split, Part # 539273G7L
• 2100mm x 700mm, single, Part # 538444G8L
• 2100mm x 700mm, split, Part # 539273G8L
• 2100mm x 800mm, single, Part # 538444G9L
• 2100mm x 800mm, split, Part # 539273G9L
2.2.2 Side Panels
Side panels for each size cabinet are fashioned from sheet metal. Quarter-turn fasteners outside the
unit permit removal of all panels for maintenance while preserving internal security during normal
operation.
An optional side panel lock with keys (Part # 011399067L) is available to secure the side panel. The
lock insert is installed near the bottom center of the side panel.

Major Components
3
To install the Side Panel Lock:
1. Insert a key into the lock to use as a handle.
2. Remove the locking nut from the cylinder.
3. Insert the lock, cam first, into the panel. The cam should be pointed to the right.
4. Slip the nut over the cam and tighten it onto the plastic lock cylinder.
5. Test the lock to ensure that it operates properly.
Figure 1 Side panel lock components
2.3 Mounting Hardware
Hardware to install all options is shipped with the Knurr DCM. Bags of nuts, screws, washers and
other mounting hardware are attached to the frame. Some mounting hardware ships inside the box
containing the optional equipment.
• 50 each: 10-32 cagenuts, screws and rosette washers
• 20 M5 spring nuts
• 20 M5 screws
• 4mm hex Allen wrench
Side Panel Lock
cylinder
Nut to secure Side
Panel Lock to panel
Keys
Side Panel Lock
cam

Installation
4
3.0 INSTALLATION
3.1 Inspection
Upon receiving a Knurr DCM, examine the packaging for any signs of mishandling or damage. If any
damage is noted, notify your local Liebert representative and your carrier immediately.
Figure 2 Knurr DCM as shipped
3.2 Required Setup Equipment
Each Knurr DCM ships with all the tools necessary to remove the unit from the pallet. The tool kit,
(Part # 542665G1) contains the following tools:
•1M5AllenWrench
•1M6AllenWrench
• 1 Torx L Key ,T30
The following tools are required to set up a Knurr DCM:
• pallet jack or forklift
• utility knife or scissors
• 9/16" ratchet or wrench
• 6mm hex wrench
Tilt Indicator shows
whether the unit was been
tilted beyond the allowable
limit or mishandled during
shipping
Braces secure Knurr DCM
to shipping pallet; one at
each corner
Shrink wrap secures corrugated
corner protectors to the Knurr
DCM and shields the unit from
contact damage
Corrugated Corner
Protectors at each
corner
Part Number and
Serial Number

Installation
5
3.3 Unloading the Knurr DCM
Before unloading a Knurr DCM, note the weight of the model (see 6.0 - Specifications. Use at least
two people when moving the unit.
1. Using a pallet jack or forklift, move the Knurr DCM on its pallet to the installation location.
2. Cut the shrink wrap and remove all packaging.
3. Remove the lag bolts securing each shipping bracket to the shipping pallet; there is one bracket at
each corner of the Knurr DCM; each bracket has two lag bolts (see Figure 3).
4. Raise the leveling feet so that the rack will rest on the feet:
a. Use the supplied hex wrench to lower each caster until the Knurr DCM is not resting on the
shipping brackets.
b. Remove the hex bolts securing the shipping brackets to the Knurr DCM.
Leave the shipping brackets attached if they will be used to secure the cabinet to the floor.
5. Use a pallet jack or forklift to raise the Knurr DCM off the shipping pallet.
6. Slide the shipping pallet out from under the rack.
The Knurr DCM may be positioned for installation either with the forklift, by two or more people
carrying it or by rolling the cabinet on its casters.
If the casters are to be used to move the cabinet, the leveling feet must be raised by reversing Step 4
above. Position the cabinet and either lower the leveling feet or bolt the cabinet to the floor with the
shipping brackets.
Figure 3 Removing rack from shipping pallet
3.4 Equipment Layout
To keep the unit’s center of gravity as low as possible, install equipment from the bottom up, starting
with the heavier units. Leave any unused space at the top of the enclosure.
!
CAUTION
After equipment is installed, the Knurr DCM may have a high center of gravity. Avoid tipping
the unit when it is being moved.
Raise leveling feet
by turning the hex
nut on each foot
(one at each corner).
... to free the shipping
braces from the pallet.
Remove lag bolts at each
corner of the rack ...

Installation
6
3.5 Basic Hardware Installation—Nutbars and Spring Nuts
The Knurr DCM is designed with T-slots on exposed faces of the aluminum frame members. These
T-slots permit placing nutbars and spring nuts anywhere along a frame member to mount equipment
at any distance desired (see Figure 4). Nutbars and spring nuts accept M5 and M6 screws used to
attach most equipment and options to the rack’s aluminum frame members.
Figure 4 T-slot configuration and nutbar
3.5.1 Inserting a Nutbar or Spring Nut
To insert a nutbar or spring nut into a T-slot on the Knurr DCM frame, compress the spring on the
back of the nutbar and slip it into the T-slot (see Figure 5). If the nutbar or spring nut does not
flatten out into the slot, press down on the edge of the block that is too high.
Properly installed nutbars and spring nuts have the thread hole section on the outer side of the T-slot
(see Figure 5). The leaf spring holds the nutbar or spring nut in place while a screw is threaded and
tightened. Nutbars and spring nuts can be pressed down with a small tool and moved for better
alignment.
Nutbar, Front (above)
and Back (below)
Leaf Springs Stabilize
Nutbar in T-Slot
"W700" and "W800"
Stamped on face of
M5 nutbar
Cross-Section of Horizontal
Knurr DCM Frame Member
T-Slots
Spring Nut
Leaf Spring Stabilizes
Spring Nut in T-Slot
T-Slots
Cross-Section of Vertical
Knurr DCM Frame Member