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Refrigeration

Modular Refrigeration Unit (MRU)

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MRU-TAN_062113_26_SWOOSH
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Modular Refrigeration Unit (MRU) provides thermal control to insulated containers in ambient temperatures as high as 130°F and as low as -40°F. Both the MRU-TQ1-404 and MRU-TQ3-404 can be rigidly attached to either the Tricon or Quadcon insulated containers. The MRU is designed to replace the Thermo King VM405 and the Carrier Integra 30S with improved performance, reliability, and ease of maintenance. Using a high-efficiency, environmentally safe refrigerant, the MRU meets or exceeds all requirements for military container heating and cooling.

Tested to U.S. Military Standard 810 – Official Modular Refrigeration Unit used by the U.S. Military

  • Designed for high ambient temperatures and desert conditions
  • Designed for maintenance or repair with common tools from standard military tool kits
  • Mean Time Between Failure (MTBF) rate of 5,202 hours
  • 20-year storage life without performance degradation
  • Designed for maintenance or repair with common tools from standard military tool kits
  • Straightforward, intuitive control panel
  • Integrated LCD that simplifies temperature and defrost settings
  • 18 LED status indicators and nine jumpers located on the PCB allow user override of sensors and relays
  • Wire harnesses are straightforward plug and play
  • Brazing, soldering or wire splicing never required

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Physical
Height21.4 inches54.3 cm
Width36.8 inches93.3 cm
Depth38 inches96.5 cm
Weight350 lbs158.8 kg
Electrical Power
MRU-TQ1-404120 VAC, single-phase, 60Hz
MRU-TQ3-404208 VAC, 3-phase, 50/60 Hz Y Connection w/Neutral
Cooling Capacity
MRU-TQ1-4042,800 BTU/hr (820 W) at 0°F/100°F 6,600 Btu/hr (1,933 W) at 35°F/100°F
MRU-TQ3-404 4,100 Btu/hr (1,200 W) at 0°F/100°F 9,750 Btu/hr (2,857 W) at 35°F/100°F
Refrigerant R-404A6 lbs 8 oz
Set Up Time – The MRU can be installed in less than 30 minutes by two personnel and is operable by a soldier outfitted in all levels of Mission Oriented Protective Posture (MOPP) equipment. The MRU requires less than 90 minutes Mean Time To Repair (MTTR) including evacuation and recharging using standard, commercial support and test equipment.
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Military Brochure

Commercial Brochure – English

Commercial Brochure – Spanish

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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone:  321-631-3550
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Container

Quadcon Refrigerated Container System (QRCS)

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Mainstream’s Quadcon Refrigerated Container System (QRCS) is approved by the United Sates Marine Corps (USMC). QRCS is a six-foot ten-inch by eight-foot by four-foot nine-inch (6’10” X 8’ X 4’9”) insulated container with Mainstream’s Modular Refrigeration Unit (MRU) that is powered by an external power source and capable of storing and transporting temperature sensitive cargo. Our MRU maintains the insulated container at freezer or refrigerator temperature ranges in ambient temperatures ranging from -25 to +125°F. Mainstream’s QRCS is certified by NSF International to satisfy sanitary requirements of NSF ANSI 7 Standard for Commercial Refrigerators and Freezers. It is ISO 1496-2 tested and CSC approved. The QRCS operates with 208 VAC, 50/60 Hz, three-phase power input or 120 VAC, 60 Hz, single-phase power.

Tested to U.S. Military Standard 810

Official Modular Refrigeration Unit approved USMC

  • Electrically Powered RU with Full-Width Double Door
  • Verified to Meet MIL PRF 32335 Requirements
  • ISO Tested and CSC Approved
  • NSF/ANSI Standard 7 Certified
  • High Efficiency with Energy Saver Option
  • MTBF 5,022 hrs.
  • 20 Year Storage

QRCS/MRU Value-Added Features

Designed for Military Environment
The MRU was designed for the harsh military environment. The unit has been tested to MIL STD 810G (e.g., salt-fog, humidity, sand-dust, solar, ice & freezing rain, blowing rain and watertightness, EMI [RE102 and CE102], high and low temperature operation & storage, ground mobility, rail impact and transit drop).

Improved Air Flow and Air Circulation
Air is drawn into the evaporator so condensation is not sprayed onto the food inside the container. The conditioned air circulates from the evaporator compartment to provide more uniform air flow distribution and prevent air blockage.

Total Unit Modularity
Every component can be replaced with common tools. Tube brazing or wire splicing is never required.

System Redundancy
Component redundancy allows the MRU to operate even if a condenser fan, evaporator fan, fan capacitor or heater fails. Extra terminals are available on the relays if a contact pits and fails.

Energy Saver Option
In freezer mode, an energy saver selection switch automatically operates the MRU longer during cooler periods of the day, such as the evening, to reduce power consumption.

Circuit Breakers
The MRU uses re-settable circuit breakers. There are no fusible links or fuses.

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Physical
Size82″H X 96″L X 57″W
Doorsfull-width double door
Power ConnectorMS90556-C-32412P
Maximum Gross Weight11,900 lbs.
Tare Weight 2,673 lbs.
Payload Capacity8,745 lbs.
Internal Volume155 cu. ft.
Operating Temperature Range-25 to 125°F
Storage Temperature Range-50 to 160°F
Minimum Circuit Ampacity 15amps at 208VAC 50/6 0 Hz
Requires Y connection w /neutral
Refrigerant Charge6.5 lbs. R-404A
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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone:  321-631-3550
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Container

TriCon Refrigerated Container System (TRCS)

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Mainstream’s Tricon Refrigerated Container System (TRCS) is the official TRCS used by the U.S. Armed Forces and is the only TRCS verified to meet MIL-PRF-32335. TRCS is an eight-foot by eight-foot by six-foot six-inch (8′ X 8′ X 6′ 6″) insulated container with Mainstream’s Modular Refrigeration Unit (MRU) that is powered by an external power source and capable of storing and transporting temperature sensitive cargo. Our MRU maintains the insulated container at freezer or refrigerator temperature ranges in ambient temperatures ranging from -25 to +125°F. Mainstream’s TRCS is certified by NSF International to satisfy sanitary requirements of NSF/ANSI 7 Standard for Commercial Refrigerators and Freezers. It is ISO 1496-2 tested and CSC approved. The Type III TRCS variant is equipped with interior shelving units with a 600 lbs.-per-shelf capacity and both interior and exterior lighting. The TRCS operates with 208 VAC, 50/60 Hz, three-phase power input.

Tested to U.S. Military Standard 810
Official Modular Refrigeration Unit used by the U.S. Military

  • Type I – Electrically Powered RU with Full-Width Double Door
  • Type III – Electrically Powered RU with Single-Man Door
  • Verified to Meet MIL-PRF-32335 Requirements
  • ISO Tested and CSC Approved
  • NSF/ANSI Standard 7 Certified
  • High Efficiency with Energy Saver Option
  • MTBF 5,022 hrs.
  • 20 Year Storage
  • Portable Exterior Lighting System (PELS)
    Standard on Type III, Optional on Type I

TRCS/MRU Value-Added Features

Designed for Military Environment
The MRU was designed for the harsh military environment. The unit has been tested to MIL-STD-810G (e.g., salt-fog, humidity, sand-dust, solar, ice & freezing rain, blowing rain and watertightness, EMI [RE102 and CE102], high and low temperature operation & storage, ground mobility, rail impact and transit drop).

Improved Air Flow and Air Circulation
Air is drawn into the evaporator so condensation is not sprayed onto the food inside the container. The conditioned air circulates radially from the evaporator compartment to provide more uniform air flow distribution and prevent air blockage.

Total Unit Modularity
Every component can be replaced with common tools. Tube brazing or wire splicing is never required.

NSF Food Grade Shelving Units
The TRCS can be outfitted with NSF certified removable stainless steel shelving units consisting of five 22″ wide shelves spanning the length on each side of the container (standard on Type III, optional on Type I).

PELS Lighting System
Available with an approved Portable Exterior Light System (PELS) with magnetic mounting bracket for attachment anywhere on the exterior of the TRCS (standard on Type III, optional on Type I).

Interior Lights
Available with an approved Interior (White and Black-out) LED lighting system (standard on Type III).

System Redundancy
Component redundancy allows the MRU to operate even if a condensor fan, evaporator fan, fan capacitor or heater fails. Extra terminals are available on the relays if a contact pits and fails.

Energy Saver Option
In freezer mode, an energy saver selection switch automatically operates the MRU longer during cooler periods of the day, such as the evening, to reduce power consumption.

Circuit Breakers
The MRU uses re-settable circuit breakers; there are no fusible links or fuses.

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PhysicalType IType III
Size96″ x 77.5″ x 96″96″ x 77.5″ x 96″
Doorsfull-width double doorsingle-man door
PELS LightOptionalIncluded/Standard
Removable Stainless Steel ShelvesOptional(5) 22″ wide shelves included/Standard
Power ConnectorMS90556-C-32412PMS90558-C-32412P
Maximum Gross Weight 26,460 lb 26,460 lb
Tare Weight3,880 lb4,630 lb
Payload Capacity22,580 lb21,830 lb
Operating Temperature Range-25 to 125°F-25 to 125°F
Storage Temperature Range-50 to 160°F-50 to 160°F
Minimum Circuit Ampacity15 amps at 208 VAC 50/60 Hz Requires Y connection w/neutral15 amps at 208 VAC 50/60 Hz Requires Y connection w/neutral
Refrigerant Charge6.5 lbs R-404A6.5 lbs R-404A
NSN (National Stock Number)
Type I8145-01-598-4828
Type III8145-01-598-4829
Type III PELS6230-01-630-7370
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TriCon Brochure

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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone:  321-631-3550
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HVAC

Ruggedized Environmental Control Unit (RECU)

RECU MEC Web Graphic
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Mainstream’s 5-tonR RECU is the latest in ultra-efficient, military-ready, ducted, unitary, heat pump systems. It provides heating, ventilation, and air conditioning to USAF BEAR Base shelters. The RECU is compatible with NBC filter/blower equipment and is certified to operate with Collective Protection (ColPro) equipment in a chemical, biological, radiological, and nuclear (CBRN) environment. The RECU also includes compressor soft-start technology and microprocessor-based embedded diagnostics/prognostics. These units were designed to replace the FDECU, LECU, and the IECU while improving performance, reducing weight, simplifying maintenance, and increasing reliability. Optional wye ducts are available, allowing one RECU to cool two shelters.

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Ordering Information
Part # RECU60K134
On GSA Contract Yes
USAF Part # E2CU60K3208
NSN-USAF Pending
Specifications
L x W x H 61″ x 42″ x 38-1/4″
Weight 647 lbs
Service Life 25 years
Recommended Inspection Interval 36 months
Duct Diameter 16″
Duct Length 8′
Noise 79 dBA
Input Power 208/230 VAC, 3 phase, 50/60 Hz
RECU Breaker Rating 50 A
Cable 25′ SOOW
Connector Class L MS90556C32412P
Evaporator Air Flow 2000 scfm @ 1 in.H2O
Soft Start Yes
Refrigerant
Type R-134a/HFO Compatible
Charge 12 lbs
Capacity
Cooling (@ 125/90/75°F) 68,000 Btu/hr
Heating (Electric) 35,600 Btu/hr
Heating (Heat Pump) Yes
Operator Controls
Digital Remote Thermostat Yes
Digital Diagnostics and Prognostics Yes
Digital Display Yes
Microgrid Compatible Yes
Operating Temperature Range
Cooling 50°F to 125°F
Heating -25°F to 75°F
Approved For
463L Pallet Transport Up to 6 Units
Tricon Transport Up to 4 Units
BEAR Compatible Yes
Collective Protection (ColPro) Certified Yes
NBC Filter/Blower Equipmnet Compatible Yes
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Brochure

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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone: 321-631-3550
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HVAC

Improved Environmental Control Unit (IECU)

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Mainstream’s modular Improved Environmental Control Units (IECUs) provide heating and cooling to troop shelters, containers, vehicles, and communications enclosures in ambient temperatures as high as 140°F and as low as -50°F. The IECU is available in three different nominal cooling capacities (9,000, 18,000 and 36,000 Btu/hr) with multiple power input options. Designed to replace legacy R-22 based ECUs, the IECU features improved energy efficiency, lighter weight, and easier maintenance. The IECU uses environmentally safe R-410A refrigerant and meets or exceeds all requirements for military heating and cooling.

    • Designed for Military Environment
    • Simple and intuitive control panel
    • No Training required for basic operation
    • Software upgradable PCB controller with battle-short capability
    • Removable remote provides for control at a convenient location
    • Designed for maintenance or repair with common hand tools from standard military tool kit.
    • Diagnostics Port allows complete troubleshooting with only a multimeter
    • Embedded diagnostics and 16 board-mounted LED indicators simplify maintenance
    • Plug and play modular components
    • Brazing/soldering not required during any maintenance procedure
    • All refrigerant components have threaded O-ring fittings that can be replaced with simple hand tools
    • Soft start device helps protect tactical power grids by limiting in rush current at start up.
    • EMI conducted and radiated emissions tested to MIL-461F
    • Designed for 20 year storage life
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IECU Specifications
Model
9K 115 VAC 1-Phase
18K 230 VAC 1-Phase
18K 208 VAC 3-Phase
36K 208 VAC 3-Phase
Cooling (BTU/hr) @125F ambient
9,383
18,506
19,201
40,100
Heating (Watts)
2,200
4,500
4,200
9,000
Power (KW) @125F
2.2
3.5
3.5
6.4
Weight (Lbs)
134
226
208
295
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IECU Brochure

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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone:  321-631-3550
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Converter

25kW SiC-based OPTI Drive

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Mainstream designed, built and tested a 25 kW continuous (35 kW peak), 105 °C liquid cooled, wide-bandgap (WBG) three-phase motor drive. This motor drive is based on a custom SiC module. The motor drive is 99% efficient, weighs only 11.5 lbs, and has dimensions of 11″ x 7″ x 3.5″. Installation into the end application vehicle is also simplified because all electrical and fluid connections are located on the same enclosure face.

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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone:  321-631-3550
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Converter

10kW IGBT-based Opti Drive

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Mainstream’s variable frequency drive is a liquid cooled motor drive with an integrated active PFC rectifier for meeting the strict requirements of MIL-STD 461. It can be powered by a 208/230 Vac, 50/60 Hz source (such as the AC grid, a generator, or a tactical microgrid) or modified to operate from a DC source. The motor drive can be used with fluid inlet temperatures from -40° to 70°C and drive AC induction motors or AC permanent magnet synchronous motors using advanced sensorless field-oriented control.

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Specification
Min
Nominal
Max
Units
Dimensions (L x W x H) 17.5 x 13.5 x 4.25 Inches
Weight 31 lbs
AC Input Voltage 183 208 240 Vline-line rms
AC Input Frequency 45 50/60 66 Hz
Line Voltage Unbalance -5% 0 5%
Input Current 25 Arms per line
Inrush Current < 25 Apeak per line
Input Power Factor (DPF) 0.99 Displacement power factor
Input Power Factor (HPF) 0.99 Harmonic power factor
AC Output Voltage 0 230 Vline-line rms
AC Output Frequency 0 1000 Hz
AC Output Current 0 25 Arms per line
Output Voltage dV/dt 2.5 kV/µs
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Variable Frequency Drive

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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone:  321-631-3550
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Converter

Satellite Space Converter

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Space Converter Brochure

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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone:  321-631-3550
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Radar

Tactical Mobile Radar Thermal Management System

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Sentinel A4 Heat Exchanger
 
In Partnership with
 
Mainstream Engineering’s Sentinel A4 Heat Exchanger (HEX) supports Lockheed Martin in meeting the stringent U.S. Army requirements for operation of this next-generation radar in extremely harsh environmental conditions. The HEX assembly was designed and developed, and is currently manufactured by our company. This thermal management system (TMS) provides cooling to the radar array and is currently the only active TMS on a rotating radar platform in the world. Features of Mainstream’s Sentinel A4 HEX include:

Mainstream’s OPTI Variable-Speed Pump
Mainstream’s OPTI Variable-Frequency Drive
Mainstream’s OPTI Microchannel Radiator
Mainstream’s OPTI Active Accumulator

User Benefits

Fully Operational on rotating platform (30 rpm)
Designed for base and growth modes
Operates in ambient temperatures between -40°C and +48°C
Operates in all military conditions – designed IAW MIL-STD-810 environmental requirements
Designed to the electromagnetic interference requirements of MIL-STD-461, including: CS101, CE102, CS114, CS115, CS116, CS118, RE102, and RS103

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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone:  321-631-3550

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