MDF-U700VXC: 25.7 cu.ft. Twin Guard Series Ultralow Temperature Freezer with -86° Dual Compressor Cooling System

The Industry’s Safest, Most Energy Efficient Ultra-Low Storage Solution for High Value Biologicals.

The 25.7 cu.ft. VIP® insulated MDF-U700VXC includes integrated LCD performance monitor and digital controller for comprehensive system management, data logging, remote communications, alarms, predictive performance and validation. Maintenance free, filterless design.

The Panasonic Twin Guard Series satisfies an industry demand for safe, long-term storage for the most high-valued materials. Two independent refrigeration systems, combined with optional liquid nitrogen or liquid CO2 back-up systems, offer a circle of protection unmatched in the marketplace. Developed for use with conventional inventory racks and boxes, the Twin Guard Series is ideal for storage of sensitive stem cells, embryos, cell lines, and other rare specimens.

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Twin Guard Series -86° Dual Compressor Cooling System

The Twin Guard Series Ultra-Low Freezer avoids conventional cascade refrigeration technology by using two completely independent one-compressor, autocascade cooling systems, each capable of maintaining ultra-low temperatures.

• Each refrigeration circuit includes a closed-loop cold-wall evaporator configured in parallel to the other.

• Independent evaporators and cooling fans assure back-up status at all times, eliminating system failure due to sub-component failure in conventional cascade systems configured of mutually dependent high- and low-stage systems.

• Either circuit will maintain -65°C. In the unlikely event of a compressor failure in one system, the remaining system will automatically maintain a minimum of -65°C for an indefinite period.

• A unique EcoMode deploys both systems in overlapping cycles to maintain -86°C and to reduce energy consumption by as much as 15%.

• Evaporator coils embedded in the patented, high-tech, Panasonic VIP® PLUS vacuum-insulated thin-wall cabinet are strategically oriented to deliver the best temperature uniformity at all shelf levels, top-to-bottom and front-to-back.

• New Panasonic designed Cool Safe refrigeration compressors feature innovative refrigerant feedback processes to reduce compressor temperature, thereby extending compressor life and minimizing heat output.

• In the event of a facility power failure with optional CO2 or LN2 backup system installed, the freezer will maintain -65°C storage temperature for up to 8 hours.

Safe & Secure Sample Management

Panasonic's newly designed dual compressor cooling system ensures safe storage of valuable biological samples.  Two individually-controlled compressors provide a reliable -86° C ultra-low temperature environment. In the unusual case of an unexpected failure in one of cooling circuits, the other compressor secures the sample safety, preventing any damage.

Energy Saving ECOMode

The Panasonic Twin Guard Series Freezer can be set for Normal or EcoMode operation, depending on ambient temperature and load. ECOMode is recommended for 90-95% of applications. Although both refrigeration systems are completely independent, EcoMode establishes an overlapping cycle to significantly reduce energy consumption while optimizing interior uniformity from top-to-bottom and front-to-back for protection of high value materials.

Cabinet Construction

Patented VIP® PLUS vacuum insulation panel cabinet construction for high insulating value and increased interior volume in the same footprint. The VIP® PLUS minimizes energy transfer to and from the ultra-low temperature interior. The composite construction, complete with reflective barrier film and structural closed cell foam, is used on all walls and the outer door. This advanced insulation technology offers structural stability to eliminate distortion, and inhibits moisture accumulation that can lead to icing. Aggregate insulation efficiency minimizes compressor cycle run-time to lower energy costs.

• The high-tech, composite thin-wall cellular construction combines the vacuum panel insulation with polyurethane foam for structural stability and high insulation values to minimize energy use.
• Easy-In/Easy-Out door latch for smooth, one-handed operation, positive seal against gasket. Key lock provision standard.
• Universal keyed door lock offers added security.
• The outer door closes uniformly against a multi-point gasket to form a tight seal and prevent moisture migration leading to frost or ice build-up.
• The interior inventory system is based on a center shelf and two latching insulated inner doors designed for one-handed operation. Inner doors minimize exposure during routine
  door openings.
• The two primary compartments can be sub-divided by adjustable shelves to accommodate standard stainless steel inventory racks for 2” or 3” boxes.
• Rounded Interior corners enhance temperature uniformity and simply cleaning and decontamination when required.

Intelligent LCD Control, Alarm and Monitoring

The Twin Guard Series MDF-U700VXC is managed by an integrated microprocessor controller with LCD information center to simplify all freezer functions. Uniform ultralow temperature is achieved through a combination of performance systems supervised by the controller complete with alarm, programming and diagnostic protocols.

• The control panel is center mounted in the outer door for easy, eye-level access.

• Control and information center includes an intuitive popup menu, high resolution LCD for inputs, outputs and performance at-a-glance.

• Multi-point data logging offers a graphical display for temperature verification at-a-glance.

• Precise logic systems control and adjust to temperature setpoints and alarm parameters.

• Setpoint, alarm and programmable inputs are established through pop-up menus and function keys.
• Standard parameters are factory-set for quick start-up, and all parameters can be changed as required.
• Logged parameters can be exported to remote databases, off-site alarm or data capture systems through optional communications board module for compliance monitoring.
• A remote alarm terminal mounted at the side of the cabinet can be connected to an external alarm system. An optional PC interface permits remote transmission.
• Tactile feedback, touch pad data shift and entry keys simplify operation. All setpoint and alarm functions are entered through an intuitive keypad with visual prompts.
• Both refrigeration systems, including compressors and fan motors are background monitored for performance.
• Out-of-compliance notifications and warnings are automatically displayed with audible warnings when necessary.

Other Features

• Circular-chart temperature recorder (optional) mounts easily in pre-engineered mounting space.
• Insulated and gasketed inner doors seal inside to offer additional protection, improve uniformity. Inner door latches are standard.
• New, air-cooled Super Condenser energy transfer technology maintains optimum condenser air flow and eliminates the need for an air filter or periodic cleaning and
  maintenance required by other manufacturers.
• High impact, recessed casters and leveling feet simplify installation
• Seismic restraints secure cabinet to building superstructure to meet local codes.
• New generation Panasonic designed Cool Safe compressors are specifically designed for one compressor, auto cascade applications.
• Twin Guard Series independent, autocascade refrigeration -86° dual compressor cooling circuit offers two systems in one, each providing back-up for the other, or working together in EcoMode operation for additional energy savings
• Multiple access ports permit insertion of independent probes, instrumentation or liquid nitrogen or liquid CO2 back-up injectors.
• HCFC-refrigerants are highly efficient, environmentally safe, non-ozone depleting.
• Internal voltage and power management systems assure component protection over wide voltage ranges.
• A vacuum relief valve is mounted in the left wall.
• Remote alarm contacts and optional communication port available.

Control and Alarm System

• Both refrigeration systems, including compressors and fan motors are background monitored for performance.
• Out-of-compliance notifications and warnings are automatically displayed with audible warnings when necessary.
• Circular-chart temperature recorder (optional) mounts easily in pre-engineered mounting space.
• New, air-cooled Super Condenser energy transfer technology maintains optimum condenser air flow and eliminates the need for an air filter or periodic cleaning and
  maintenance required by other manufacturers.

Green Design and Performance

Because modern laboratories are energy-intensive, Panasonic has developed a corporate-wide energy savings and environmental impact approach to new product development. The Twin Guard Series ultra-low freezer offers significant benefits through a balance of refrigeration power, cabinet construction and intelligent control over all functions.

• The Twin Guard Series is designed to support LEED certification associated with the U.S. Green Building Council recommendations.
• Components are compliant with RoHS directives on the use of hazardous materials in electrical and electronic equipment.
• The Panasonic VIP® Plus vacuum insulated panel cabinet design offers high-density storage in a minimal footprint, optimizing available laboratory space and storage volume efficiencies, as well as reducing energy consumption.
• Nose reduction and operating cost efficiencies are integrated into the refrigeration system.
• Heat output is limited to minimize the impact on facility HVAC demands.
• A microprocessor controller oversees the refrigeration system to regulate cooling cycle on/off times, reducing energy consumption in normal and EcoMode  operating. EcoMode is selectable through the LCD controller by the end user and is recommended in most applications.

MDF-U700VXC-PA
Cooling Performance
Temperature Setpoint Range	-50°C to -86°C
Dual Compressor Cooling System	-86°C (ambient temperature -30°C)
Single System Cooling Performance (Indefinite)	> -65°C (ambient temperature -30°C)
Cabinet Design and Construction
Cabinet Insulation	Patented VIP ® PLUS composite wall, energy savings
Exterior Dimensions (w x f-b x h)	39.8" x 34.3" x 79.1" (1010 x 870 x 2010 mm)
Interior Dimensions (w x f-b x h)	34.3" x 23.6" x 55.1" (870 x 600 x 1400 mm)
Volume	25.7 cu.ft. (728 L)
Shelves	3, adjustable, stainless steel (4 compartments)
Access Port	Diameter= 0.5" (17 mm); 3 locations
Vacuum Release Port	Standard manual
Refrigeration System
Refrigerant Technique	-86° Dual Independent Compressor Cooling Systems with Automatic Switchover
Compressors	2 Compressors, Hermetically 1100W Cool Safe compressor, air-cooled
Refrigerant	Environmentally Safe HFC
Air Exchange	Dual condenser fans with particulate trap; no filters are required
Cycle Options	Standard or energy-saving EcoMode operation
Controls, Alarm, Monitoring
Controller	Microprocessor-based, door-mounted control with graphical LCD information center
Data Management	Internal Data log with log file memory
Communications	Data can be transmitted via RS485 interface
Alarms	High/Low temperature, Door ajar, Power failure, Remote Alarm Contact, Part Replacement Notification, Fan Motor Lock, Indivdual Cooling Circuit Check
Remote Alarm Contacts	Standard; Normally Open and Normally Closed; Dry Contacts
Electrical	208V-230V, AC, 60Hz, 1 phase, NEMA 6-15, 15 amp separate breaker recommended
Optional Accessories
Digital Temperature Recorder	Auxiliary Data Logger, HamsterDT2
Liquid CO2 Back-Up System	Auxiliary tank back in event of power failure, CVK-UB2(I)-PW
Liquid N2 Back-Up System	Auxiliary tank back in event of power failure, CVK-UBN2-PW
Chart Recorder	Circular Chart Temperature Recorder, 7 Day, MTR-C954
Chart Paper	6" Diameter, 7 Day Chart , C7100386REV
Inner Door Configurations	See icon and key to catalog number
Replacement Pen, Red	Felt tip pens, 6 per pack, R252
Replacement Pen, Blue	Felt tip pens, 6 per pack, R253
4-20 MA Output	Independent Analogue Output MTR-420MAC
Touch-Screen Temperature Recorder	Full Color Touch-Screen Digital Display FT-560SN