NEW BRUNSWICK SCIENTIFIC LN2, Manual To Operations

Page 1: ...reezers MANUAL NO M1288 0056 Revision J October 29 2007 NEW BRUNSWICK SCIENTIFIC CO INC BOX 4005 44 TALMADGE ROAD EDISON NJ 08818 4005 Telephone 1 732 287 1200 1 800 631 5417 Fax 732 287 4222 Telex 4753012 NBSCO Internet http www nbsc com E mail bioinfo nbsc com ...

Page 2: ...ii New Brunswick Scientific Co Inc User s Guide ...

Page 3: ...g No 250 Cao Xi Road Shanghai 200235 P R China Tel 86 21 6484 5955 or 5966 Fax 86 21 6484 5933 E mail nbschc online sh cn THE NETHERLANDS New Brunswick Scientific BV Kerkenbos 1101 6546 BC Nijmegen P O Box 6826 6503 GH Nijmegen Nederland Tel 31 0 24 3717 600 Fax 31 0 24 3717 640 E mail sales nbsbv nl FRANCE New Brunswick Scientific SARL 12 14 Rond Point des Champs Elysées 75008 Paris France Tel 33...

Page 4: ...t remove any covers There are no operable controls other than those referred to in this manual There are voltages in excess of 41 5 volts AC behind the covers 3 This equipment maintains low temperatures in the freezers to which it is connected These temperatures are such that direct contact with the contents or the inside of the freezer can burn unprotected skin 4 Observe good housekeeping practic...

Page 5: ...ent damage and personal injury can occur Please read the entire User s Guide before attempting to use this unit Do not use this equipment in a hazardous atmosphere or with hazardous materials for which the equipment was not designed New Brunswick Scientific Co Inc NBS is not responsible for any damage to this equipment that may result from the use of an accessory not manufactured by NBS ...

Page 6: ...t and improvement Manual Conventions NOTE Notes contain essential information that deserves special attention CAUTION Caution messages appear before procedures which if caution is not observed could result in damage to the equipment WARNING Warning messages alert you to specific procedures or practices which if not followed correctly could result in serious personal injury Bold Text in boldface ty...

Page 7: ...ents and assembly and our obligation under this warranty is limited to repairing or replacing the instrument or part thereof which shall with in 1 year after date of shipment prove to be defective after our examination This warranty does not extend to any NBS products which have been subjected to misuse neglect accident or improper installation or application nor shall it extend to products which ...

Page 8: ... by application of the following standards EN50081 1 1992 Emission Standard EN50082 1 1992 Immunity Standard BS EN 55014 1 2001 BS EN 55014 2 1997 BS EN 61000 3 2 2001 BS EN 61000 3 3 1995 FCC Part 15 Class B Approved by _____________________ on this 3rd day of December 2001 D J Minister Executive Designer New Brunswick Scientific Co Inc 44 Talmadge Road Edison NJ 08818 USA New Brunswick Scientifi...

Page 9: ...stalling the LN2 Valve Injector Assembly 7 2 2 4 Installing the LN2 Supply 8 2 2 5 Testing for Gas Leaks 9 2 2 6 Installing the Magnetic Door Sensor 9 2 2 7 Installing the Control Unit 11 3 OPERATION 13 3 1 GETTING STARTED 13 3 1 1 Testing Gas Flow Door Switch Operation 13 3 1 2 Testing Injector Valve LED Operation 14 3 1 3 Testing Backup System Operation 14 3 1 4 Battery Backup 15 3 1 5 Optional ...

Page 10: ...x New Brunswick Scientific Co Inc User s Guide 7 INSPECTION FORM 22 7 1 LN2 BACKUP PRESSURE SYSTEM CHECKLIST 22 8 INDEX 23 ...

Page 11: ...measure the internal temperature A freestanding control unit and cables are provided Transfer lines and connectors are supplied to connect between the injector and the LN2 low pressure storage Dewar Dewars however are not provided NOTE A low pressure liquid nitrogen storage Dewar with a pressure regulated liquid withdrawal port is required Liquid nitrogen must be used to ensure proper operation Th...

Page 12: ...n is essential to keep a person who enters the area from possible suffocation 1 3 Product Specifications 1 3 1 Dimensions Control Unit Control Unit Width 203 mm 8 0 in Depth 342 mm 13 5 in Height 86 5 mm 3 4 in Other important dimensions Power Cord Cable Hose Lengths Power cord 3 0 m 9 8 ft Temperature sensor cable 2 75 m 9 ft Control unit to injector cable 0 9 m 3 ft Magnetic door sensor cable 1 ...

Page 13: ...uld maintain The user should then install the system switch the freezer off and record the time it takes for the LN2 Dewar to empty while the system maintains the desired temperature This precaution will enable the user to select the Dewar size best suited to providing the degree of protection required As a guide the following chart can be used to calculate consumption Table 1 LN2 Consumption Rate...

Page 14: ...1 3 6 Electrical Supply Requirements Single phase 100 240V 50 60Hz 1 0 Amp 1 3 7 Fuses The control unit input power socket is fitted with two fuses Live and Neutral They are both 2 amp 250 volt 20mm ceramic T fuses see Section 5 for replacement part numbers 1 3 8 Operating Environment The LN2 backup system is designed for and tested to the CE UL specifications listed below Indoor use Altitude up t...

Page 15: ...ve occurred in shipping Report any damage and or deficiencies within 14 days to your nearest New Brunswick Scientific Company using Customer Satisfaction Form 6300 or to the agent who supplied the equipment Also report damage to the carriers within their specified time limit See Section 4 7 for details on NBS return authorization policy 2 2 Installing Individual Parts WARNING The LN2 back up unit ...

Page 16: ...probe cover 8 Using two more cable ties secure the probe cable to the two fixing points plastic clips attached to the cabinet of the freezer 9 For the Model U101 freezer complete Steps 9 12 the temperature sensor cable should pass under the fixed shelf and be located on the right side of the internal cabinet The probe should be attached directly next to the existing freezer temperature probe 10 Re...

Page 17: ... injector assembly 2 Tighten the fitting by turning it clockwise For Chest Freezers 1 Remove the compressor housing panel if not already removed 2 Remove the 2 inch blanking plug from the rear panel of the freezer 3 Insert the smaller fitting of the insulated transfer hose through the port pull enough hose through to attach to the solenoid valve injector assembly 3 Attach the free end of the insul...

Page 18: ...ed inside the upper right hand side of the compressor compartment 1 Make sure the manifold to injector hose assembly passes through the port in the rear panel of the freezer and the solenoid valve cable to the control unit passes through the grommet on the upper rear panel 2 Install the solenoid valve injector assembly to the port inside the compressor compartment as described in steps 1 through 6...

Page 19: ...to lack of LN2 supply 2 2 6 Installing the Magnetic Door Sensor The magnetic door sensor is composed of two separate items and is installed a on Upright models except model U101 on the top left hand surface of the door b on the U101 Upright model on the top right hand surface of the door c on Chest models on the rear right hand surface of the lid NOTE For Innova Freezers use the two small metal ad...

Page 20: ... removed The magnet should face toward the freezer case 2 Remove the screws on the freezer case and opposite the magnet fasten the part of the switch that has the electrical cable attached using the screws provided CAUTION Failure to adjust the magnetic door switch correctly will result in the system failing to operate correctly 3 Close the lid or door to check that the two parts of the switch do ...

Page 21: ...eezer or b on the compressor compartment of the Chest freezer Plug the cables from the LN2 injector valve temperature probe and magnetic safety switch into the appropriate sockets on the rear of the control unit as identified in Figure 2 below Figure 2 CO2 LN2 CONTROL UNIT Front Panel LEDs VALVE OPEN Green TEMP WARNING Red REMOTE CONTROL Amber BATTERY LOW Red ...

Page 22: ...lectrical engineer NOTE Some kits are supplied with more than one removable power cord Utilize the cord that matches your power receptacle Check the voltage rating plate on the underside of the control unit to confirm that the system is compatible with your laboratory power supply The control unit is capable of operating within a wide voltage range 100 240VAC 50 60Hz Attach the appropriate power c...

Page 23: ...e sure the freezer door lid is closed and that the LN2 supply is turned on The freezer should be OFF 2 With the control unit switched on and the LN2 supply turned on the Valve Open light should illuminate indicating gas injection 3 Carefully open the door lid 5 cm about 2 inches the gas supplied through the injector should switch off The gas injection should never occur while the door lid is open ...

Page 24: ...tting to 10o C colder than the freezer s actual temperature The Temperature Warning and Valve Open lights should come on The Valve Open light will illuminate to indicate that gas is being injected to cool the freezer 2 Unplug the backup unit s power cord from the power supply The Power On light should go out but there should be no change in the Temperature and Valve On indicator lights on the fron...

Page 25: ... supply fails the internal battery will power the backup unit for up to 48 hours depending upon ambient conditions With power off Should the battery voltage drop below 11 4 volts the battery low indicator will illuminate and the audible alarm will sound 3 1 5 Optional Remote Control If remote control is desired an RS 485 interface must be installed within the control unit If the RS 485 interface i...

Page 26: ...e connected to the remote alarm socket Maximum rating is 24 volts 1 amp Figure 3 Alarm Monitoring Socket Plug E L N E L N 3A 250V 3A 250V 1 2 3 1 2 3 Normal Operation Alarm Condition Pin 1 E Closed Circuit Pin 2 L Closed Circuit OPEN Pin 3 N OPEN Closed Circuit The provided plug can be connected to either a central monitoring system or a remote alarm ...

Page 27: ...re 1 Turn off the gas supply 2 If the LN2 backup system is installed on a Chest freezer also disconnect the freezer from its power source and remove the compressor housing cover from the freezer so it is possible to inspect the transfer line over its full length up to and including the solenoid 3 Carefully inspect the transfer line over its entire length for any cracks or damage 4 Replace the tran...

Page 28: ...alified service engineer should perform the following procedure using ONLY a replacement battery of the correct type and part number 1 Remove the four screws holding the cover on the unit 2 Lift the cover from the unit 3 Unplug and remove the old battery and replace it with a new battery 4 Reconnect the battery red to positive black to negative 5 Reinstall the cover 4 6 Routine Performance Check R...

Page 29: ...Freezers User s Guide For return authorization call your NBS service department When you do return any material or equipment be sure to quote both the model part number and its serial number which you will find labeled on the bottom of the control unit ...

Page 30: ...380 0451 Black Plastic Plug Premium only pack of 2 P0625 0140 Black Plastic Plug Innova only pack of 2 K0740 0330 Insulation Tube P0625 0300 Tie wrap fasteners pack of 5 K0700 0140 Insulated Transfer Line 2M P0625 0250 LN2 Solenoid Valve Injector Assembly Premium only P0625 0260 LN2 Solenoid Valve Injector Assembly Innova only P0625 0261 LN2 Solenoid Valve Injector Tube Premium only P0625 0530 LN2...

Page 31: ...21 M1288 0056 LN2 Backup Units for Innova Premium Freezers User s Guide 6 6 S SC CH HE EM MA AT TI IC CS S 6 1 LN2 Circuit Diagram Schematic ...

Page 32: ...m Checklist INSPECTED BY DATE RESULT 1 Inspect LN2 Dewar to solenoid transfer line for cuts in the cover insulation chaffing crushing or other damage 2 Inspect transfer line connection to the Dewar There should be no damage or corrosion 3 Inspect LN2 solenoid and transfer line connection There should be no damage or corrosion ...

Page 33: ...Rear Panel 11 Copyright Notice vi D Dimensions 2 Disclaimer Notice vi E Electrical Connections 18 Electrical Supply 4 F Fuses 4 G Gas Consumption 3 Gas Supply Check 17 H Health Safety Act 1974 iv I Injector Test 13 Inspection 5 Inspection Form 22 International Offices List of iii L LN2 Consumption 3 LN2 Supply 1 4 LN2 Valve Injector Installing the 7 Low Battery Alarm 18 M Magnetic Door Sensor Inst...

Page 34: ...Control Option 15 Return Authorization 5 Return Authorization Number 18 Return Authorization Policy 18 RS 485 15 S Safety 1 Schematic 21 Service 17 Shipping Damage 5 Specifications 2 System Checklist 22 T Table of Contents ix Temperature Range 1 Temperature Warning Light 13 14 Transfer Lines 17 V Valve Open Light 14 Valve Test Button 13 Voltage 4 W WARNING Symbol for vi Warranty vii Weight 2 ...