Middle Atlantic Products MRK-4426 User Manual
Displayed below is the user manual for MRK-4426 by Middle Atlantic Products which is a product in the Rack Cabinets category. This manual has pages.
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96-039 / rev m / 3-9-18
MRK Series
19” gangable enclosure narrow design for large multi-bay jobs
features:
• Fully welded construction provides the following weight
capacities: UL Listed load capacity: 2,500 lbs., seismic
certified capacity - 1,050 lbs.
• 22” OD width with multiple depths available
• 1/2”, 3/4”, 1” & 1-1/2” electrical knockouts on split
rear plates top & bottom, easily removable for cable
pass-through, top plates additionally include UHF/VHF
knockouts
• Two wide pairs of 10-32 threaded rackrail with
numbered rackspace increments
• Optional solid, fully vented, plexi and vented plexi front
doors available
• Open top with configurable top panel options
• Durable black textured powder coat finish
• Seismic certified (when used with MRK-Z4 option) with
an Ip value of 1.5
• UL Listed in the US and Canada
EIA compliant 19” gangable equipment rack shall be Middle Atlantic Products model # MRK-__ (refer to
chart). Overall dimensions shall be __”H x 22”W x __”D (refer to chart). Useable height shall be __ rack-
spaces, useable depth shall be __” (refer to chart). Fully welded construction shall provide a UL Listed load
capacity of 2,500 lbs. Rack shall be constructed of steel and all structural elements shall be finished in a
durable black powder coat. Rack shall include a locking, latching rear door. Rack shall come equipped with
two pairs of steel rackrail with tapped 10-32 mounting holes in universal EIA spacing, black e-coat finish
and numbered rackspaces (select models also available with cage nut style rackrail, refer to chart). Rack
shall have removable split rear knockout panels with 1/2”, 3/4”, 1” and 1-1/2” electrical knockouts and top
BNC knockouts for UHF/VHF antennae. Grounding and bonding stud shall be 1/4-20 threaded, installed in
base of enclosure. MRK Series enclosures shall satisfy the 2007 & 2010 CBC; 2006, 2009 & 2012 IBC;
ASCE 7-05 (2005 Edition) & ASCE 7-10 (2010 Edition) and the 2006 & 2009 editions of NFPA 5000 for
use in areas of high seismicity, Seismic Use Group III, Zone 4 or Seismic Design Category (SDC) “D” with
lateral force requirements for protecting 1,050 lbs. of essential equipment in locations with the highest
level of seismicity and top floor or rooftop installations with an Importance factor (Ip) of 1.5 when used with
MRK-Z4 seismic floor anchor bracket. Rack shall be OSHPD approved for fixed equipment anchorage in
California healthcare facilities. Rack shall be UL Listed in the US and Canada. MRK shall be GREENGUARD
Gold certified. MRK enclosure shall shall meet the RoHS EU Directive 2011/65/EU. MRK shall be
manufactured by an ISO 9001 and ISO 14001 registered company. MRK enclosure shall be warrantied to
be free from defects in material or workmanship under normal use and conditions for the lifetime of the
rack.
Customizable specification clips available at middleatlantic.com
specifications:
options:
• Front doors shall be reinforced steel, model # FD-x (solid),
VFD-x (vented, 25% open area), LVFD-x (vented, 64% open area),
PFD-x (plexi), PVFD-44 (vented plexi) (x = # of rackspaces)
• Vented steel rear doors shall be model # MW-VRD-44 (vented top
and bottom), MW-LVRD-x (vented, 64% open area, excludes 24
and 37 space rack) (x = # of rackspaces), MW-CLVRD-44 (split
rear door, vented, 79% open area)
• Removable keylocked side panels shall be model # SPN-x-
(267/312/36/423) (x = # of rackspaces), 267 = 26-1/2” cabinet
depth, 312 = 31-1/2” cabinet depth, 36 = 36” cabinet depth,
423 = 42” cabinet depth
• Top panels shall be steel, multiple styles available including
model # MW-ST (solid), MW-10FT (10” fan), MW-4FT (four 4-1/2”
fans), MW-6FT (three 6” fans), MW-VT (vented), MW-LA (accepts 6”
and 12” wide cable ladders) and MV-PVT (26/31/36/42) (Vented
pagoda adds 1.41” to top of rack)
• Caster base shall add 1” to overall height, featuring four casters with
a 1,300 lb. weight capacity, UL Listed in the US and Canada. Model
# CBS-MRK-x (x = cabinet depth)
• Fine floor friendly caster base shall have a 700 lb. weight capacity.
Model # CBS-MRK-xR (x = cabinet depth)
• Rail bracket adapters shall allow for mounting of panels vertically
between rackrail brackets. Available for 44 space enclosures. Model
# RBA-MV44-2, 2 rackspaces.
• Seismic Zone-4 and Seismic Use Group III compliancy floor anchor
kit shall be model # MRK-Z4
• Slide-out AXS enclosure option available (See AXS Spec sheet #
96-055S)
MRK-4426
EIA/TIA COMPLIANT
SEISMIC CERTIFIED
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MRK Series
configured a/v enclosure
configured A/V enclosure ships complete with
the most commonly used accessories
includes:
• Integrated fan top with proportional speed fan controller
• Configurable rear door with bottom vent, solid locking front door
• 3-1/4” wide, 44 space vertical lacer strip
• Six horizontal lacer bars
• Twelve 8” Velcro® cable management straps
• Thin power strip, 20 Amp, 20 outlet with cord
• Leveling feet
• 100 qty. 10-32 mounting hardware
• Available with or without sides
• Ganging hardware available for add-a-bay models without sides
EIA compliant 19” gangable equipment rack shall be Middle Atlantic Products model # MRK- __-AV (refer to chart). Overall dimensions
of rack shall be 83-1/8” H x __” W x __” D (refer to chart). Useable height shall be 44 rackspaces, useable depth shall be __” (refer
to chart). Fully welded construction shall provide static capacity of 10,000 lbs. and a UL Listed load capacity of 2,500 lbs. Rack shall
be constructed of the following materials: top and bottom shall be 14-gauge steel, horizontal braces shall be 16-gauge steel, solid front
door shall be 18-gauge steel and all structural elements shall be finished in a durable black powder coat. Rack shall include a locking,
latching rear door. Rack shall come equipped with two pairs of 11-gauge steel rackrail with tapped 10-32 mounting holes in universal EIA
spacing, black e-coat finish and numbered rackspaces. Rack shall include 100 qty. 10-32 mounting screws. Rack shall be equipped with
one vertical lacer strip, Middle Atlantic Products model # LACE-44-OP. The LACE-44-OP is 3-1/4” wide and the useable height is 44
rackspaces. Rack shall also include four ‘L’ shaped straight and two 4” offset horizontal lacer bars and twelve, 8” Velcro® straps for cable
management. Models intended for ganging (MRK-__-AV-AB) (refer to chart) shall include ganging hardware for multi-bay installations.
Rack shall feature integrated fan top, Middle Atlantic Products model # MW-10FT-FC for active thermal management. MW-10FT-FC shall
feature proportional speed fan control and maximum airflow shall be 550 CFM. Rack shall have removable split rear knockout panels
with 1/2”, 3/4”, 1” and 1-1/2” electrical knockouts and top BNC knockouts for UHF/VHF antennae. Grounding and bonding stud shall be
1/4-20 threaded, installed in base of enclosure. MRK Series enclosures shall satisfy the 2007 & 2010 CBC; 2006, 2009 & 2012 IBC;
ASCE 7-05 (2005 Edition) & ASCE 7-10 (2010 Edition) and the 2006 & 2009 editions of NFPA 5000 for use in areas of high seismicity,
Seismic Use Group III, Zone 4 or Seismic Design Category (SDC) “D” with lateral force requirements for protecting 1,050 lbs. of essential
equipment in locations with the highest level of seismicity and top floor or rooftop installations with an Importance factor (Ip) of 1.5 when
used with MRK-Z4 seismic floor anchor bracket. Rack shall be OSHPD approved for fixed equipment anchorage in California healthcare
facilities. Rack shall include a high-density thin power distribution and shall be Middle Atlantic Products model # PDT-2020C-NS with 20
outlets and 20 amps. Thin power distribution shall be 72-3/4” long x 1” deep x 1.9” wide. JBox shall be 2” deep x 2” wide. Thin power
distribution shall feature 20 NEMA 5-20R outlets. Corded power strip includes 20-amp protection and mounting hardware. Corded model
shall be terminated with 10 foot power cord and NEMA 5-20P plug. PDT Series shall feature a black anodized finish. MRK and PDT Series
shall be UL Listed in the US and Canada. MRK-__-AV shall be GREENGUARD Gold Certified. MRK-__-AV shall be RoHS EU Directive
2011/65/EU compliant. MRK-__-AV shall be manufactured by an ISO 9001 and ISO 14001 registered company. PDT-2020C-NS and
MW-10FT-FC shall be warrantied to be free from defects in material or workmanship under normal use and conditions for a period of 3
years. MRK enclosure shall be warrantied to be free from defects in material or workmanship under normal use and conditions for the
lifetime of the rack.
Customizable specification clips available at middleatlantic.com
specifications:
MRK-4426-AV-AB
EIA/TIA COMPLIANT SEISMIC CERTIFIED
26-1/2” or
31-1/2”
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MRK Series
configured NVR/DVR enclosures
complete NVR / DVR enclosure addresses the
cable and thermal management needs of both
network and digital video recording devices
includes:
• Two pairs cage nut style rackrail (NVR enclosure)
• Two pairs 10-32 threaded rackrail (DVR enclosure)
• One pair of cage nut style Z-rail adapters (NVR enclosure)
• Fully vented top
• Fully perforated vented front door and vented split rear door
• 3-1/4” wide, 44 space vertical lacer strip
• Six horizontal lacer bars
• Twelve 8” Velcro® cable management straps
• Thin power strip, 20 Amp, 20 outlet with cord
• One each 1 space and 2 space brush grommet
• Leveling feet
• 100 qty. 6mm threaded cage nuts and rack screws (NVR enclosure)
• 50 qty. 10-32 threaded cage nuts and rack screws (NVR enclosure)
• 100 qty. 10-32 mounting hardware (DVR enclosure)
• Available with or without sides
• Ganging hardware available for add-a-bay models without sides
EIA compliant 19” gangable equipment rack shall be Middle Atlantic Products model # MRK- __-DVR (NVR) (refer to chart). Overall
dimensions of rack shall be 83-1/8” H x __” W x __” D (refer to chart). Useable height shall be 44 rackspaces, useable depth shall be
__” (refer to chart). Fully welded construction shall provide a static capacity of 10,000 lbs. and a UL Listed load capacity of 2,500 lbs.
Rack shall be constructed of the following materials: top and bottom shall be 14-gauge steel, horizontal braces shall be 16-gauge steel,
perforated vented front door shall be 18-gauge steel and all structural elements shall be finished in a durable black powder coat. Rack
shall include a locking, latching rear door. Rack shall come equipped with two pairs of 11-gauge steel rackrail with tapped mounting
holes in universal EIA spacing, black e-coat finish and numbered rackspaces. Rack shall include 100 qty. 10-32 mounting screws (DVR
enclosure) or 100 qty. 6mm cage nuts and rack screws with 50 qty. 10-32 threaded cage nuts and rack screws (NVR enclosure). Rack
shall be equipped with one vertical lacer strip, Middle Atlantic Products model # LACE-44-OP. The LACE-44-OP is 3-1/4” wide and the
useable height is 44 rackspaces. Rack shall also include four ‘L’ shaped straight and two 4” offset horizontal lacer bars and twelve, 8”
Velcro® straps for cable management. Models intended for ganging (MRK-__-_ -AB) (refer to chart) shall include ganging hardware for
multi-bay installations. Rack shall have removable split rear knockout panels with 1/2”, 3/4”, 1” and 1-1/2” electrical knockouts and top
BNC knockouts for UHF/VHF antennae. Grounding and bonding stud shall be 1/4-20 threaded, installed in base of enclosure. MRK Series
enclosures shall satisfy the 2007 & 2010 CBC; 2006, 2009 & 2012 IBC; ASCE 7-05 (2005 Edition) & ASCE 7-10 (2010 Edition) and
the 2006 & 2009 editions of NFPA 5000 for use in areas of high seismicity, Seismic Use Group III, Zone 4 or Seismic Design Category
(SDC) “D” with lateral force requirements for protecting 1,050 lbs. of essential equipment in locations with the highest level of seismicity
and top floor or rooftop installations with an Importance factor (Ip) of 1.5 when used with MRK-Z4 seismic floor anchor bracket. Rack
shall be OSHPD approved for fixed equipment anchorage in California healthcare facilities. Rack shall include a high-density thin power
distribution and shall be Middle Atlantic Products model # PDT-2020C-NS with 20 outlets and 20 amps. Thin power distribution shall
be 72-3/4” long x 1” deep x 1.9” wide. J-Box shall be 2” deep x 2” wide. Thin power distribution shall feature 20 NEMA 5-20R outlets.
Corded power strip includes 20 amp protection and mounting hardware. Corded model shall be terminated with 10 foot power cord
and NEMA 5-20P plug. PDT Series shall feature a black anodized finish. MRK and PDT Series shall be UL Listed in the US and Canada.
MRK-__-DVR (NVR) shall be GREENGUARD Gold Certified. MRK-__-DVR (NVR) shall be RoHS EU Directive 2011/65/EU compliant.
MRK-__-DVR (NVR) shall be manufactured by an ISO 9001 and ISO 14001 registered company. PDT-2020C-NS shall be warrantied
to be free from defects in material or workmanship under normal use and conditions for a period of 3 years. MRK enclosure shall be
warrantied to be free from defects in material or workmanship under normal use and conditions for the lifetime of the rack.
Customizable specification clips available at middleatlantic.com
specifications:
MRK-4436-NVR-AB
EIA/TIA COMPLIANT SEISMIC CERTIFIED
31-1/2” or
36”
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rear view top & bottom top view of MRK side top view
rear view side view
side view
floor mounting locations
front view
Top Options
(removable plate opening accomodates 2 space panel)
1” [25] & 1.5” [38] EKO
1/2” [13] & 3/4” [19] EKO
5/8” [16] DIA KO
1/2” [13] DIA “D” KO
(UHF/VHF Antenna EKO)
1.72 [44]1.5 [38]
3.44 [87]
1.5 [38]
.78 [20]
5.94 [151]
22.00 [559]
1” [25] & 1.5”
[38] EKO
.90 [23]1.56 [40]
19.50
[495]
22.88 [581]
19.25
[489]
A
3.00 [76]
18.88
[479]
1/4 - 20 X 1”
grounding stud
(1 place only)
2.07 [53] 2.07 [53]
Ø0.44 [Ø11] -
8x 0.79 [20] MRK-XX26=21.50 [546]
MRK-XX31=26.50 [673]
MRK-XX36=31.10 [790]
MRK-XX42=37.10 [942]
MRK-XX26=24.29 [617]
MRK-XX31=29.29 [744]
MRK-XX36=33.89 [861]
MRK-XX42=39.89 [1013]
17.13
[435]
fron
tr
ear
19.88
[505]
C
22.00 [559]
B
C
rackrail to front door
clearance (with rackrail
in forward-most position)
2.23 [57] solid/vented
2.04 [52] plexi door
D
max. rear
rail setback
front rail setback
1.50 [38]
1.50 [38]
8.41 [214]
2.13
[54]
removable EKO plates
MW-10FT accepts 10” fan
MW-10FT-550CFM includes 10” fan
MW-10FT-FC includes 10”
fan and fan controller
MW-6FT accepts 6” fans
MW-6FT-660CFM
includes 6” fans
MW-4FT accepts 4-1/2” fans
MW-4FT-380CFM includes 4-1/2” fans
MW-4QFT-FC includes 4-1/2”
quiet fans and fan controller
MW-LA accepts 6”,
9” and 12” width
cable ladder
MW-ST solidMW-VT slot
vent
MW-LVT 64%
open area
Part #
A
Overall
B
Useable Height
C
Overall Depth
D
Useable Depth
MRK-4426 83.125” [2112] 77.125” [1959] 26.40” [671] 24.00” [610]
MRK-4426-AV-AB* 83.125” [2112] 77.125” [1959] 26.40” [671] 24.00” [610]
MRK-4026 76.125” [19341 70.125” [1781] 26.40” [671] 24.00” [610]
MRK-3726 70.875” [1800] 64.875” [1648] 26.40” [671] 24.00” [610]
MRK-2426 48.125” [1223] 42.125” [1070] 26.40” [671] 24.00” [610]
MRK-4431** 83.125” [2112] 77.125” [1959] 31.40” [798] 29.00” [737]
MRK-4431-AV-AB* 83.125” [2112] 77.125” [1959] 31.40” [798] 29.00” [737]
MRK-4431-DVR-AB* 83.125” [2112] 77.125” [1959] 31.40” [798] 29.00” [737]
MRK-4031 76.125” [1934] 70.125” [1781] 31.40” [798] 29.00” [737]
MRK-3731 70.875” [1800] 64.875” [1648] 31.40” [798] 29.00” [737]
MRK-2431 48.125” [1223] 42.125” [1070] 31.40” [798] 29.00” [737]
MRK-4436** 83.125” [2112] 77.125” [1959] 36.00” [914] 33.60” [853]
MRK-4436-NVR-AB* 83.125” [2112] 77.125 [1959] 36.00” [914] 33.60” [853]
MRK-4036** 76.125” [1934] 70.125” [1781] 36.00” [914] 33.60” [853]
MRK-3736 70.875” [1800] 64.875 [1648] 36.00”[914] 33.60”[853]
MRK-2436 48.125” [1223] 42.125” [1070] 36.00”[914] 33.60”[853]
MRK-4442** 83.125” [2112] 77.125” [1959] 42.00” [1067] 39.60” [1006]
MRK-4042** 76.125” [1934] 70.125” [1781] 42.00” [1067] 39.60” [1006]
all dimensions in inches unless otherwise noted [all dimensions in brackets are in millimeters]
MRK Series
basic dimensions
* DenotesthatAV,DVRandNVRmodelsarealsoavailableconguredwithoptionalsidepanels(remove
AB
sufxforpartno.e.g.MRK-4426-AV).Sidepanelsadd1-5/16”[33mm]tooverallwidthofrack.
** Availableconguredwith2pairscagenutstylerackrail,sufxmodelnumberwith‘PRO’.