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CHART MVE Fusion Technical Manual Download Page 8

20994124 REV A 

 8 

 

 

Figure 2: Cross Section of the MVE Fusion Freezer  

 

 

Summary of Contents for MVE Fusion

Page 1: ...20994124 REV A 1 MVE FUSION Technical Manual ...

Page 2: ...lt in damage to the unit injury to personnel and or poor equipment performance It is intended for use by trained personnel only All service and maintenance should be performed by an authorized MVE Distributor or Service Technician NOTE All MVE Fusion models are Class I per IEC 61140 as the AC electrical supply requires a protective earth ground These devices are externally powered and intended for...

Page 3: ...skin eyes and clothing Warning Asphyxiating Atmosphere Indicates the potential for an oxygen depleted atmosphere due to nitrogen vapor Take care to operate device in a well ventilated area Warning Electricity Indicates a potential electrical hazard Take care to avoid contact with electricity Warning Explosive Indicates a potential explosive hazard The expansion ratio of liquid nitrogen to gas is 1...

Page 4: ...uefied Boiling Point at 1 atmosphere 195 8 C 320 3 F 77 4 K Thermal Conductivity Gas 25 83 mW m K Heat of Vaporization Liquid 198 38 kJ kg Liquid density at 1 atmosphere 1 782 lbs L 807 4 g L 808 6 kg m3 Liquid Nitrogen Safety Transferring LN2 and operating the MVE Fusion should be done in accordance with the manufacturer supplier instructions It is important that all safety precautions recommende...

Page 5: ...ostbite warm area with warm water not exceeding 105 F 40 C and SEEK IMMEDIATE MEDICAL ATTENTION Never place LN2 in a sealed container without a pressure relief device The expansion ratio of liquid nitrogen to gaseous nitrogen is 1 to 700 1 cubic foot of liquid nitrogen becomes 700 cubic feet of gaseous nitrogen when evaporated The two most important safety aspects to consider when handling LN2 are...

Page 6: ...Data Sheet MSDS present The MSDS may be obtained from the manufacturer distributor The MSDS will specify the symptoms of overexposure and first aid to be used Here is a typical summary If symptoms of asphyxia such as headache drowsiness dizziness excitation excess salivation vomiting or unconsciousness are observed remove to fresh air If breathing has stopped give artificial respiration CALL A PHS...

Page 7: ...and Function 3 1 System Overview The MVE Fusion system consists of several key components identified in Figures 1 and 2 dewar Pressure Vessel Liquefier Shroud Graphical User Interface GUI and Retractable Stairs Figure 1 MVE FUSION FREEZER ...

Page 8: ...20994124 REV A 8 Figure 2 Cross Section of the MVE Fusion Freezer ...

Page 9: ...LED display provides system security through password protected admission The main screen allows quick access to and displays key parameters such as the internal freezer temperature the cryogen liquid level cryocooler motor temperatures the cryogen pressure and system alarms Battery Backup A 12V 9 0Ah sealed lead acid battery allows for monitoring of the freezer parameters and alarms for a minimum...

Page 10: ...gas pressure etc is exceeded or if the freezer lid has been removed for more than 5 minutes Serial Communication Two full duplex RS 232 communication ports are provided to monitor the VFD and control system and modify parameters These are for use by trained service technicians or other qualified personnel only USB port A standard USB interface allows easy access to download the event historical lo...

Page 11: ...20994124 REV A 11 Figure 4 Internal Components of Liquefier Figure 5 Liquefier back panel Physical connections Cowling off ...

Page 12: ... unit consists of a pressure wave generator PWG and a coaxial Stirling pulse tube coldhead see Figure 6 As liquid nitrogen boils off it rises to the top of the pressurized inner LN2 storage tank There heat is removed from the gaseous nitrogen by the cryocooler and converted back into a liquid This highly efficient design eliminates the need for a constant supply of LN2 and allows for autonomous op...

Page 13: ...which precools the gas before it reaches the cold heat exchanger see Error Reference source not found 3 As the gas moves toward the cold heat exchanger gas in the acoustic network thermal buffer tube warm heat exchanger and reservoir also moves in the same direction Even as the driven gas stops advancing when the pistons reach their upper limits the helium gas continues moving in the inertance tub...

Page 14: ...rt s vast experience and industry leading technology by incorporating these already proven freezers into a freezer that runs solely on electricity The only difference is that an internal cryogen storage pressure vessel is added along with a cryocooler to maintain the cryogen in a liquid state The MVE dewar consists of the following major components and features Stainless Steel Construction All sto...

Page 15: ...rogen storage tank designed to ASME standards with safety pressure relief device and muffler Liquid Level Sensing Differential pressure sensors continuously monitor the liquid nitrogen level Fill and Vent Ports Easily accessible valves are provided for initial filling and venting of liquid nitrogen see Figure 9 Figure 8 Retractable Stairs Removable Lid and lazy Susan within the Storage Space ...

Page 16: ...20994124 REV A 16 Figure 9 Left to Right Vent Overfill Valve Relief Valve and Fill Valve ...

Page 17: ...ryogen tank and can be turned easily using the handles provided The inner cryogen tank is filled nearly to the top so that the entire outside of the tank serves as heat exchange surface to cool the air inside the storage space The initial fill of the cryogen tank is performed when the unit is first delivered to the customer site by Chart or an authorized distributor Figure 10 Cross Section View of...

Page 18: ...tairs make it easy to access the storage space They can be folded up against the freezer when not in use as shown in Figure 8 A restraint is included to keep the stairs from being accidentally unfolded Transfer line In the event the MVE Fusion needs refilling or topping off for instance after a prolonged power outage a proper hose to transfer LN2 from a supply tank to the pressure vessel is requir...

Page 19: ...quefier enclosure shown in Figure 12 The RTD probe is supplied by Chart Industries and is pre installed silicone into place and calibrated The temperature probe tube communicates directly with the air inside the storage space to read the air temperature There is an additional temperature probe tube plugged at the factory that can be used by the customer to install a secondary probe based on the cu...

Page 20: ...e on the back panel of the liquefier b Additional temperature probe access tube for the secondary temperature probe 3 7 Product Specifications Table 2 MVE Fusion Product Specifications Safety for Electrical Equipment and Lab Use ETL marked for use in the United States and Canada according to UL 61010 1 2012 Edition 3 0 CSA CAN 22 2 61010 1 2012 Edition 3 0 ASME Section VIII Cryogen pressure vessel...

Page 21: ...ance Sample temperatures under 150 C in top box unless a More than two warm 13 2 large racks are added to the freezer at one time or b Power is lost for more than 5 days with no lid openings or c Lid left open for 15 minutes Pressure Vessel Cryogen Liquid Nitrogen Volume 50 Liters Pressure Relief Valve 50 PSI Storage Specifications Number of Racks 20 Standard 13 2 racks 13 shelves for 2 boxes plus...

Page 22: ...cklist Signed by shipping inspector 4 1 Filling the MVE Fusion Following the careful uncrating and unpacking of the freezer install using these basic instructions CAUTION This information is included primarily for reference Chart recommends any cryogen filling refilling be done by Chart personnel or a Chart authorized distributor CAUTION Always wear protective gloves and face shield when work in w...

Page 23: ...ventory systems and Error Reference source not found for a standard Fusion rack layout NOTE VERY IMPORTANT TO ADD RACKS AND BOXES BEFORE FILLING Figure 13 a View inside storage container b Inventory systems Figure 14 Rack Layout for MVE FUSION ...

Page 24: ...tor be placed on this end of the transfer hose for this filling process 5 Open the liquid supply valve on the 230 liter LN2 supply tank and fill the bottom of the storage space with approximately 20 30 liters of LN2 or until the liquid level reaches the at the bottom of the lazy Susan 6 Close the liquid supply valve on the 230 liter LN2 supply tank 7 Remove the phase separator is used and connect ...

Page 25: ... during the filling process 11 Open the fill valve on the Fusion refer to Error Reference source not found The vent valve will remain open until the freezer is filled with LN2 Figure 17 Vent and Fill Valve 12 Once LN2 begins to flow steadily out of the vent close the vent valve then close the fill valve Immediately thereafter close the liquid valve on the 230 liter LN2 supply tank NOTE The inner p...

Page 26: ...ure relief valve will begin releasing gaseous nitrogen as the storage space and racks within cool down This is a result of the liquid boiling off and pressure building above 50 PSIG inside of the pressure vessel As the internal chamber and storage racks cool down to a stable temperature the relief events will subside and the pressure vessel will need to be topped off with LN2 At steady state the o...

Page 27: ...20994124 REV A 27 operation Be prepared to have a 230 LN2 cylinder 22 35 PSI to refill pressure vessel if this occurs ...

Page 28: ...oth functioning of the system The MVE Fusion uses an Android tablet with a custom built software application to monitor the freezers operation CAUTION The user should never operate the Fusion freezer without the Android running the custom built software application and should never exit the application during operation 5 1 1 Starting the Fusion Freezer Safely This section of the manual will detail...

Page 29: ...ches 3 Once powered on the MVE Fusion controller will start up with two screens displaying the Android logos shown in Figure 20 before the main menu of the Fusion application is loaded Figure 20 Android logo screen that appear when the Fusion system is powered up ...

Page 30: ...and corners of the screen the user is in For instance to reach the Levels screen from the Main screen touch the Level heading on the upper right hand corner or swipe a finger from the right to left as if dragging the screen sideways Then the Main screen will be replaced by the Level screen 5 2 2 Main Screen The main screen displays several key parameters including Freezer temperature cryogen level...

Page 31: ...l of the cryogen storage tank displayed as a percentage of full level The level normally does not change unless there is a prolonged power outrage and some cryogen is sacrificed to maintain the storage space temperature If the cryogen level is below the 50 user should refill the cryogen tank and should call for tech service and inform the situation 4 Alarm Mute Button This button can be used to mu...

Page 32: ...select day option indicate below the time line the bar graph shows the average Freezer temperature recorded for the respective hour 5 2 3 Level Screen The level screen displays the amount of cryogen as a percentage available at the given moment The same screen provides several other key parameters such as Freezer temperature Cold tip temperature Gas pressure of the cryogen tank Left and Right moto...

Page 33: ...rt recommends the RTD calibration be done by Chart personnel or a Chart authorized distributor The RTD probe must be removed from the freezer in order to be calibrated Figure 23 Calibration screen 1 Touch the Start calibration button 2 Enter the password in the Password field 3 Select the Start calibration button 4 The default boiling temperature for liquid nitrogen will appear in the LN2 Temp fie...

Page 34: ... Log Screen allows the user to save a log file to a thumb drive or other external USB drives by connecting the storage device to the USB port shown in Figure 1 entering the password and pressing the SAVE FILE button The user can select the time frame of interest under the data to save tab The log file type is a csv comma separated values text file with the filename in the format FusionLog_yyyy mm ...

Page 35: ...20994124 REV A 35 Figure 24 a Format of the Data logs screen b Format of the Data file ...

Page 36: ...r the new password in the Verify New Password field 5 Click the Update button 6 Wait for a message indicating the password was successfully changed If the GUI is unable to change the password an error message will be displayed There is an option to Reset the password in case if user forgot it 1 Touch the Reset Password option see Figure 25 2 Then there will be a pop up window asking Are you sure t...

Page 37: ...oist air to be drawn in resulting in fog obscuring the view into the storage space Return racks to the freezer as quickly as possible This maintains the cold chain of custody ensuring the samples never get warm enough to cause damage Reinstall the lid as soon as possible The Gaskets on the lid and the neck opening are designed to maintain a nearly airtight seal as long as the lid is left in place ...

Page 38: ...d be performed on the MVE Fusion to ensure optimum operation and performance as well maximum service life As with any technical piece of laboratory equipment preventative maintenance is key to equipment success Table 3 Preventative Maintenance Schedule Weekly 6 Months 24 Months 60 Months Level verification X Thaw Lid Lid Inspection X Folding Step Inspection X Gasket Replacement X Top off the Inner...

Page 39: ... minimize the top box temperature change while the lid is open 3 Allow lid to sit at room temperature for approximately 30 minutes Caution the lid open alarm will sound press alarm mute to temporarily silence the alarm 4 Once thawed thoroughly dry lid cork and liner 5 Inspect lid for damage and replace parts if necessary 4 Folding Step Inspection 1 Verify that hinges and free of cracks and all con...

Page 40: ...Trim to size as needed 6 Refill Pressure Vessel 1 Please refer to Section 5 1 Filling the MVE Fusion on how to fill the inner vessel of the MVE Fusion 7 Fan Cleaning Chart Authorized person should only carried out this activity 1 Make sure the power supply and the battery backup are disconnected 2 Remove crowling see Figure 1 and the shroud from the Liquefier by removing the four bolts that fasten...

Page 41: ... valve 1 If equipped with a relief valve deflector loosen the deflector clamp and slide off the deflector 2 Loosen the relief valve and remove it from the plumbing assembly Be sure to support the attachment tube with wrench to prevent damage from twisting 3 Install new relief valve PN 1810032 applying new Teflon tape if needed Ensure relief valve is rated to 50 PSI 3 4 bar CAUTION Installing a rel...

Page 42: ...FILL LIQUID NITROGEN AGAIN 10 Battery Backup Internal Battery Replacement General The GUI will start to lose functionality when the Battery Backup is NOT capable of generating the required VDC To test any suspect BB disconnect the AC power and allow freezer to run for 30 minutes the power failure PF alarm should trigger While it is still in PF alarm allow the freezer to perform a fill still using ...

Page 43: ...pply and the battery backup are disconnected 2 Remove Cowling see Figure 1 from the Liquefier by removing the four screws that fasten the shroud to the top of the freezer 3 Remove top cover off the Liquefier unscrewing the screws that hold the top cover of the liquefier in place see Figure 26 4 Remove the foam insert that sits over the fan and battery backup 5 Remove the four Phillips screws holdi...

Page 44: ...ackup 11 Firmware Updates MVE Fusion firmware should only be updated by authorized Chart personal or MVE Distributors Improper firmware updates can render the controller inoperable Please contact Chart Technical Service for further details ...

Page 45: ...Relief Valve 50 PSI 3 4 bar 11499812 MUFFLER 1 4 MPT WITAN M02 20570663 Temperature Probe 21183724 Lid Assembly 14010103 Power Cord 21183330 On Off Switch 21183303 Battery Backup Assembly 5 7 End of Life Disposal The Fusion freezer should be returned to Chart at the end of its useful life for proper disposal Please contact a Chart to discuss arrangements ...

Page 46: ... Please contact Chart or an authorized representative to connect to these ports passwords are required to access the data or make changes to parameters 6 2 Description of Alarms The following table describes all alarms that available in the Fusion The codes in parentheses in the right hand column are the identifiers for each variable in the serial data one may obtain from the RS232 ports on the ba...

Page 47: ...otential alarm displays and brief descriptions Alarm Description Action NO AC POWER AC power loss Operating on backup battery Find alternative power source DATA LOGGING OFF Data logging is off Contact service technician LID OPEN Lid is open Replace or reposition lid TIP TEMP FAULT Tip temp open Contact service technician SYSTEM SHUTDOWN Cryocooler Shutdown Contact service technician REJECT TEMP FA...

Page 48: ...SHORT RTD wiring shorted Contact service technician VIBRATION FAULT Vibration fault Contact service technician LID OPEN Lid is open Replace or reposition lid BATTERY LOW Backup battery voltage is low Consult technical manual or contact service technician CRYOGEN OUT OF RANGE Cryogen level out of range Consult technical manual to replenish cryogen supply GAS PRES OUT OF RANGE Gas pressure high Cons...

Page 49: ...under the alarm tab for user to observe them later Figure 29 Buzzer will stop after 30 seconds The popup message can be cleared by pressing the close button appeared on the right hand corner of the message To clear all the messages in the Alarms tab hit once on the icon given in the bottom right corner of the window 6 4 Troubleshooting CAUTION This information is included primarily for reference C...

Page 50: ...20994124 REV A 50 NOTES ...

Page 51: ...rices materials equipment quality descriptions specifications and or processes to its products at any time without prior notice and with no further obligation or consequence All rights not expressly stated herein are reserved by us as applicable Copyright 2017 Chart Industries 20994124 Rev A ...

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