Modular Refrigeration/Freezer Unit

Modular Refrigeration/Freezer Unit
Modular Refrigeration/Freezer Unit
for Insulated Shipping Containers
Mainstream’s 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-TQ1-04 and the MRU-TQ3-404 can be rigidly
attached to either 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 heating
and cooling.
``Tested to U.S. Military Standard 810
``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
``Designed for
high ambient
temperatures and
desert conditions
intuitive control
``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
Designed for
High Ambient
Temperatures and
Desert Conditions.
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-810F (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, vibration [ground mobility],
rail impact and shock [transit drop]).
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. Brazing,
soldering or wire splicing is never required.
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.
Watertight Electronics
The control box and wire harness connections are watertight to
improve reliability and simplify cleaning. The entire unit can be
hosed off to remove dirt and other contaminants.
LED Diagnostics
The MRU circuit board has 18 LED status indicators to simplify
Electrical Power
Cooling Capacity
Interactive Diagnostics Training
and Support
Mainstream provides interactive, computer-based and internet
-based training and support in addition to traditional printed
Circuit Breakers
The MRU uses re-settable circuit breakers; there are no fusible links
or fuses.
Jumper Ports
PCB jumpers simplify diagnostics and allow a field override of the control
board should the electronics fail.
Black-out Control
The black-out (lights out) feature can be used in tactical situations.
Combined Suction Line Accumulator/Liquid
Receiver with Sight Glass
The suction line accumulator is located inside the liquid receiver to improve
cooling capacity and performance. The liquid receiver contains a refrigerant
sight glass to simplify system charging.
Simplified Control System
The electrical control system can be quickly and easily tested with a multimeter.
Electrical components can be replaced with common maintenance tools.
The electrical circuit schematic is displayed on the side of the MRU to aid in
troubleshooting and repair. The entire control box can be easily removed and
replaced, if necessary.
Ease of Installation
No manual lifting is required. The MRU is designed to be installed and
removed with a forklift.
TQ1: 120 VAC, 1-phase
TQ3: 208 VAC, 3-phase
21.4 inches
36.8 inches
38 inches
350 lbs
MRU- TQ1 - 404
404: R-404A
54.3 cm
93.3 cm
96.5 cm
158.8 kg
120 VAC, single-phase, 60 Hz
208 VAC, 3-phase, 50/60 Hz — Y Connection w/Neutral
2,800 Btu/hr (820 W) at 0°F/100°F
4,100 Btu/hr (1,200 W) at 0°F/100°F
6,600 Btu/hr (1,933 W) at 35°F/100°F
9,750 Btu/hr (2,857 W) at 35°F/100°F
6 lbs 6 oz
Setup Time: The MRU can be installed in less than 60 minutes by two people and is operable by a soldier outfitted in all levels of Mission Oriented
Protective Posture (MOPP) equipment. The MRU requires less than 60 minutes Mean Time To Repair (MTTR) including evacuation and recharging using standard commercial support and test equipment.
Made in the USA
200 Yellow Place • Rockledge, FL 32955
321.631.3550 • fax 321.631.3552
[email protected]
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