Model 8600 Series - Thermo Fisher
Transcript of Model 8600 Series - Thermo Fisher
Model 8600 SeriesForma -86C Ultra Low Temperature FreezerOperating and Maintenance Manual7018612 Rev. 3
Thermo Scientific
MANUAL NUMBER 7018612
3 25693/FR-2080 7/29/09 Chg’d drier from 209016 to 209017 (refrig schematics), -201 drawing ccs
3 FR-2055 7/29/09 Added “common to” to refrigeration schematics ccs
2 25411/FR-2040 4/30/09 Changed drier from 209020 to 209016 (refrigeration schematics) ccs
1 24567/FR-2000,24605/ 5/23/08 Clarified chamber probe and thermocouple callouts, Important info above, ccs
FR-2000, 24417/SI-9962 updated exploded parts drawing (-201-1) to current production, removed 8628,
24191 software updated - added ‘Test BUS Operation’ and Micro Board Failure Error
0 23977/FR-1962 7/13/07 Release 4 - Foamed-in-place (heat exchanger) ccs
REV ECR/ECN DATE DESCRIPTION BY
Preface
Model 8600 Series i
Models Capacity (cu. ft. ) Voltage
8612 12.7 230
8615 12.7 120
8618 17 120
8619 17 230
8620 20 230
8621 20 120
Covered in this manual:
Part Number Description Qty
34040 Key Ring 1
213F Key 2
380520 Neoprene Cap 2
510016 1/4-20 x 5-1/2” Bolt 2
402058 Vacu-Key 1
195763 Retaining Clip 1
370563 Remote Alarm Connector 1
Packing List
Important installer and user information:A redundant temperature sensing device has been included in this ULTfreezer. This device is a type “T” thermocouple. For convenient access,the thermocouple (Figure 1-3) terminates in an interconnect jack (Figure1-5) behind the base front cover. (May be located differently in chests.See Section 1.) It is strongly recommended that this thermocouple beattached to a redundant 24 hour 7 day monitoring system with alarmcapabilities. Connecting the sensor to a monitoring and alarm systemseparate from the freezer provides the utmost in product safety, shouldthe integral system fail. s
Thermo Scientificii Model 8600 Series
Preface
Important Read this instruction manual. Failure to read, understand andfollow the instructions in this manual may result in damage to the unit,injury to operating personnel, and poor equipment performance. s
Caution All internal adjustments and maintenance must be performed byqualified service personnel. s
Material in this manual is for information purposes only. The contents andthe product it describes are subject to change without notice. ThermoScientific makes no representations or warranties with respect to thismanual. In no event shall Thermo be held liable for any damages, direct orincidental, arising out of or related to the use of this manual.
©2007 Thermo Scientific. All rights reserved.
Thermo Scientific Model 8600 Series iii
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with thissymbol.
Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.
Hot surface(s) present which may cause burns to unprotected skin, or to materials which may bedamaged by elevated temperatures.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipmentfalling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the marketafter 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & ElectronicEquipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Thermo Scientifichas contracted with one or more recycling/disposal companies in each EU Member State EuropeanCountry, and this product should be disposed of or recycled through them. Further information onThermo’s compliance with this directive, the recyclers in your country and information on Thermoproducts will be available at www.thermo.com.
4 Always use the proper protective equipment (clothing, gloves, goggles, etc.)
4 Always dissipate extreme cold or heat and wear protective clothing.
4 Always follow good hygiene practices.
4 Each individual is responsible for his or her own safety.
Thermo Scientificiv Model 8600 Series
Preface
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satisfaction.
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International customers, please contact your local Thermo Scientific distributor.
Sales Support
Service Support
Model 8600 Series vThermo Scientific
Table of Contents
Installation and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1Freezer Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1Control Panel Keys and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3Keypad Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4Freezer Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Choose Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5Install Wall Bumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5RS-232 Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6Remote Alarm Contacts and Analog Output . . . . . . . . . . . . . . . . .1-7Attach Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7Connect Unit to Electrical Power . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Freezer Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8Set Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9Set High Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9Set Low Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10Access Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1Calibrate the Control Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1High Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1Low Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1System Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2Bus Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2Display Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3Clear High Stage Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3Set an Access Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3RS485 Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4Back-Up System Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Section 1
Section 2
Section 3
vi Model 8600 Series Thermo Scientific
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1Wrong Power Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1High Stage System Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2Voltage Compensation Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2Multiple Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2Micro Board Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2Probe Failure Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2Lost Communication Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1Clean Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1Clean Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2Defrost Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3Clean Lid Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3Replace Battery(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4Prepare Unit for Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
Factory Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1BUS (Back Up System) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Injection Assembly Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1Temperature Probe Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2Connect Probe/ Solenoid Harness . . . . . . . . . . . . . . . . . . . . . . . . . .6-3BUS Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4
Set Optional BUS SetPoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4Test the BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5Disconnect BUS From Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . .6-5Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5Datalogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1Refrigeration Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1Warranty Handling Liquid NitrogenHandling Liquid CO2
Table of Contents
Section 4
Section 5
Section 6
Section 9
Section 11Appendix
Section 7Section 8
Section 10
Model 8600 Series 1-1Thermo Scientific
Section 1 Installation and Start-Up
Figure 1-1• Control Panel - keypad, displays and indicators• BUS (Optional Back Up System) panel• Optional temperature recorder - 7 day, one pen or datalogger• Keylock - keyed lid lock
Figure 1-2• Remote alarm contacts and selectable analog output connection -
0-1V, 4-20mA (default), 0-5V• Power inlet for power cord connection• Optional BUS connections for probe and solenoid• RS-232 or RS-485 interface• Power Switch (mains disconnect)
Figure 1-1. Front View
Figure 1-2. Rear View
Freezer Components
1-2 Model 8600 Series Thermo Scientific
Section 1Installation and Start-Up
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C F
%RH
Alarm
Sensor
To remove
filter
Thermocouple
interconnect jack
O
Battery
Switch
Condenser
Figure 1-3. Probe Cover
Figure 1-3• Houses the control, optional recorder, datalogger, BUS, or 1535 alarm
probes.
Figures 1-4 and 1-5• Freezer Filter Location• Battery Switch• Thermocouple
Receptacle• Battery Mounting
Bracket• Freezer Bqattery• Optional BUS Battery
Figure 1-4. Receptacle, Filter Battery Switch and Condenser Locations
Figure 1-5. Left Side, Sidecar Removed
Model 8600 Series 1-3Thermo Scientific
Section 1Installation and Start-Up
Mode Select Switch - Used to select Run, Settings, Calibrate and SystemConfiguration Modes.
Mode Select Indicators -Run: Run MenuSettings: Set Points MenuCalibrate: Calibrate MenuConfiguration: Configuration Menu
Temperature Display - Displays temperature in degrees Celsius.Alarm Indicator - Light pulses on/off during an alarm condition. Silence - Silences the audible alarm. Low Battery - indicates a low battery condition of the freezer battery.Hot Condenser - indicates a hot condenser condition.Message Center - displays system status and alarms. Scroll for Parameters Arrows - moves through the choices of the selectedmode.Up and Down Arrows - Increases or decreases values, toggles betweenchoices. Enter - Stores the value into computer memory.
Control Panel Keysand Indicators
Figure 1-6. Control Panel
The Model 8600 Series freezer has four basic modes which allow freezersetup: Run, Settings, Calibrate and Configuration.
Run is the default mode for the freezer during normal operation. Settings is used to enter system set points for freezer operation. Calibrate is used to calibrate various system parameters.Configuration allows for custom setup of various options.
The chart below shows the selections under each of the modes.
Scroll for Parameters Arrows: Steps the operator through the parametersof Settings, Calibrate and Configuration Modes. The right arrow goes tothe next parameter, the left arrow returns to the previous parameter.
Up Arrow: Increases or toggles the parameter value that has been selectedin the Settings, Calibrate, and Configuration Modes.
Enter: Must press Enter key to save to memory all changed values.Down Arrow: Decreases or toggles the parameter values that have been
selected in the Settings, Calibrate, and Configuration Modes.Silence Key: Press to silence the audible alarm. See Section 4 for alarm
ringback times. Message Center: Displays the system status (Mode) at all times. Displays
SYSTEM OK during normal operation, or alarm messages if the systemdetects an alarm condition. See Section 4 - Alarms.
Caution If tipped more than 45°, allow the unit to sit upright for 24 hoursbefore start up. s
1-4 Model 8600 Series Thermo Scientific
Section 1Installation and Start-Up
Keypad Operation
Run Settings Calibrate Configuration
Default ModeSYSTEM OK
Control Set Point Control Probe High Alarm Test
LINE VOLTAGE High Alarm Set Point Optional Sample Probe Low Alarm Test
COMPENSATED VOLTAGE Low Alarm Set Point System Battery Test
HSHX TEMPERATURE Optional Back Up System Set Point BUS Battery Test
Display Temperature
Clear High Stage Alarm
Set Access Code
RS485 Address
BUS type CO2 or LN2
To remove the freezer from the pallet, use the 7/16" wrench to remove allthe bolts securing the shipping bracket to the pallet.
Remove the shipping bracket. Remove the ramp boards from the palletand place the slotted end over the ramp brackets on the pallet. Thesupport blocks on the ramps will be facing down. Before moving thefreezer, make sure the casters are unlocked and moving freely. Align thecaster with the ramp boards. Use adequate personnel to roll the freezer offthe pallet.
The freezer can be easily pushed to the desired approved location,described in Section 1. If necessary, the doors and lower front panel maybe opened to move the unit through tight openings. When the freezer is inposition, set the front caster brakes.
Caution The freezer must not be moved with the product load inside. s
Locate the freezer on a firm, level surface in an area with an ambienttemperature between 18°C and 32°C. Provide ample room to reach themains disconnect switch (power switch) located on the rear of the freezer.
Caution For proper ventilation and airflow, a minimum clearance of 5” atthe rear and front and a clearance of 8” on the side of the freezer isrequired. Allow adequate space for lid opening. If ambient increases above36°C, clearance at the rear of the cabinet must be increased to 8”. s
The parts bag, located inside the cabinet, contains the following parts.
Install the bolts into the pre-tapped holes on the back of the compressorsection. Install a neoprene cap on each bolt. Refer to Figure 1-2 for thelocations of the pre-tapped holes.
Model 8600 Series 1-5Thermo Scientific
Section 1Installation and Start-Up
Freezer Installation
Choose Location
Install Wall BumpersQuantity Stock # Description Purpose
2 510016 1/4-20 x 5-1/2” Bolt Wall bumper
2 380520 Neoprene cap Cap protector
The Model 8600 Series freezer has a data communications interface. Thefactory default setting is RS-232.
The wiring identification for the interfaceis shown in Figure 1-7. One nine pin, sub"D" style connector is located on the backof the freezer. See Figure 1-2 for thelocation of the connector on the freezer.
The freezer transmits temperature information every 60 minutes. Astandard DB9 serial extension cable can be used to connect the freezer to aserial device. Some serial devices may require a null modem adapter.
Data format:Baud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1200Data bits . . . . . .8 (7 bit ASCII with leading zero)Start bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Stop bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Parity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .none
The data transfer sequence is transmitted in the following format. X refersto numerical temperature data.
(NUL) (-) XXX (SP) C (SP) (OVERTEMP) (SP) (LF) (CR) (EOT) (SP)(UNDER TEMP)
The words "OVER TEMP" or "UNDER TEMP" are transmitted whenan alarm condition exists along with the temperature. If no alarmcondition exists, spaces will be sent. A total of 20 characters will be sent.
SP - SpaceLF - Line feedCR - Carriage returnEOT - End of text (4)NUL - Null character (00)
Note The RS232 is not compatible with Model 1535 Monitor/AlarmSystem. s
1-6 Model 8600 Series Thermo Scientific
Section 1Installation and Start-Up
RS-232 Communications
Figure 1-7. Pins
The Model 8600 Series freezer has remote alarm contacts and analogoutput. See Figure 1-2 for the location of the remote alarm contacts. Theremote alarm connector is located in the parts bag provided with themanual. It must be installed if connecting the freezer to an alarm system.After installing the wiring from the alarm system to the connector, installthe connector to the freezermicroboard and secure with thetwo screws provided. The remotealarm provides a NO (normallyopen) output, a NC (normallyclosed) output and COM(common). The contacts will tripon a power outage, hightemperature alarm or lowtemperature alarm. Figure 1-8shows the remote contacts in alarmstate.
The analog output function allows the freezer to output signalsrepresenting the temperature of the freezer cabinet. The factory defaultsetting is 4-20 mA. Refer to the chart below for output specifications.
Insert the power cord into thepower inlet module. Place theretaining bracket (P/N 195763)over the connector. Tightenretaining screws to secure.
Model 8600 Series 1-7Thermo Scientific
Section 1Installation and Start-Up
Remote Alarm Contacts andAnalog Output
Figure 1-8. Alarm State
4-20mA 0-1V 0-5V
Temperature -100 to +50°C -100 to +50°C -100 to +50°C
Attach Power Cord
IMPORTANT USER INFORMATIONIMPORTANT USER INFORMATION
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Figure 1-10. Power Cord Connection
Connect Unit to ElectricalPower
Caution See the serial tag on the side of the unit for electrical specificationsor refer to the electrical schematics in this manual. s
The freezer should be operated on a dedicated grounded service. Check thevoltage rating on the serial tag of the unit and compare it with the outletvoltage. Then, with the power switch turned off, plug the line cord intothe wall outlet.
First, turn on the freezer power switch. Then open the lower front door bygrasping the bottom left corner. Locate the battery switch (Figure 1-4) andturn it to Standby mode ( ). During initial freezer start-up, the systembattery may require charging and the Low Battery message may appear inthe message center.
Caution Verify that the battery switch is turned to Standby mode ( ). Therechargeable batteries require 36 hours to charge at initial start-up. A “LowBattery” alarm may occur until the batteries are fully charged. Should apower failure occur during the initial start-up period, the electronics willhave limited operation. s
With the freezer properly installed and connected to power, system setpoints can be entered. The following set points can be entered in Settingsmode: Control temperature, high temperature alarm set point, lowtemperature alarm set point, and (optional) BUS set point. Default settingsare shown in the table below. See chart below for more detail.
1-8 Model 8600 Series Thermo Scientific
Section 1Installation and Start-Up
Freezer Start-Up
Control Set Point -80°C
High Temperature Alarm -70°C
Low Temperature Alarm -90°C
Optional BUS Set Point -60°C
All Model 8600 Series freezers have an operating temperature range of-50°C to -86°C, depending on ambient temperature. The freezer is shippedfrom the factory with a temperature set point of -80°C. To change theoperating temperature set point:
1. Press the Mode key until the Settings indicator lights.
2. Press right arrow until “SET PT = -XX” displays in message center.
3. Press the up/down arrow key until the desired temperature set point isdisplayed.
4. Press Enter to save the set point.
5. Press the Mode key until the Run indicator lights for Run mode orpress the right/left arrow keys to go to next/previous parameter.
If no control keys are pressed, the freezer will automatically return to Runmode after 5 minutes.
Note If the set point is changed and the low temperature and hightemperature alarms are set 10° from the set point, the alarm set points willbe adjusted automatically to maintain a distance of at least 10° from setpoint. s
The high temperature alarm will activate an audible/visual warning whenthe freezer chamber temperature has reached or exceeded the hightemperature alarm set point. To set the high temperature alarm set point:
1. Press the Mode key until the Set indicator lights.
2. Press right arrow until “HI ALM = -XX” displays in message center.
3. Press the up or down arrow key until the desired high temperaturealarm set point is displayed.
4. Press Enter to save the setting.
5. Press the Mode key until the Run indicator lights or press the right orleft arrow to go to the next or previous parameter.
If no control keys are pressed, the freezer automatically returns to RUNmode after 5 minutes.
Note The high alarm set point must be set at least 5°C from the controlset point. s
Note At initial start-up, the high temperature alarm is disabled until thecabinet reaches set point or 12 hours elapse. s
Model 8600 Series 1-9Thermo Scientific
Section 1Installation and Start-Up
Set OperatingTemperature
Set High TemperatureAlarm
The low temperature alarm will activate an audible/visual warning whenthe freezer chamber temperature has reached or decreased below the lowtemperature alarm set point. To set the low temperature alarm set point:
1. Press the Mode key until the Settings indicator lights.
2. Press the right arrow until “LO ALM = -XX” is displayed in themessage center.
3. Press the up or down arrow key until the desired low temperaturealarm set point is displayed.
4. Press Enter to save the setting.
5. Press the Mode key until the Run indicator lights or press the right orleft arrow to go to the next or previous parameter.
If no control keys are pressed, the freezer will automatically return to RUNmode after 5 minutes.
Note The low alarm set point must be set at least 5°C from the control setpoint. s
An access code can be set to prevent unauthorized change of settings inCalibrate, Configuration and Settings mode. (An access code of 000 isrequired to make changes.) If the access code is not at the default 000, youcan not leave RUN mode without entering a code. See Section 3 forinstructions on modifying the access code.
The Run mode is the default mode for the freezer. The run mode willdisplay the cabinet temperature on the temperature display and ‘SYSTEMOK’ on the message center under normal operating conditions. Inaddition, the Run mode allows display of the following information:
LINE VOLTAGECOMPENSATED VOLTAGEHSHX TEMPERATURE (heat exchanger temperature)
This information is scrolled individually by pressing the right arrow key. Ineach case, the message center returns to SYSTEM OK in 10 seconds if nokeys are pressed.
1-10 Model 8600 Series Thermo Scientific
Section 1Installation and Start-Up
Set Low TemperatureAlarm
Access Code
Run Mode
Model 8600 Series 1-11Thermo Scientific
Section 1Installation and Start-Up
Press MODEto light SETTINGS
indicator
Mode
Mode
SET PT = -XX
Numbers increasePress MODE to moveto CALIBRATEmode
Numbers decrease
Press Enter
to save settingScroll for Parameters
Scroll for Parameters
Mode HI ALM = -XXScroll for Parameters
Press to returnto previous parameter
Press to returnto previous parameter
Press to returnto previous parameter
Low AlarmSet Point
High AlarmSet Point
ControlSet Point
To Set:
Settings Mode
Numbers increase
Numbers decrease
Press Enter
to save setting
Numbers increase
Numbers decrease
Press Enter
to save setting
Mode
Press to returnto previous parameter
OptionalBack Up System
Set Point
Numbers increase
Numbers decrease
Press Enter
to save setting
������ ��
LO ALM = -XX
BACKUP = -XX
Model 8600 Series 2-1Thermo Scientific
Section 2 Calibration
Once the freezer has stabilized, the control probe may need to becalibrated. Calibration frequency is dependent on use, ambient conditionsand accuracy required. A good laboratory practice would require at least anannual calibration check. On new installations, all parameters should bechecked after the stabilization period.
Caution Before making any calibration or adjustments to the unit, it isimperative that all reference instruments be properly calibrated. s
Plug a type T thermocouple reader into the receptacle located inside thelower door (Figure 1-5). Compare the control temperature set point to thetemperature of the measuring device. See Chart 2-1 at the end of thissection for more detail.
1. Press the Mode key until the Calibrate indicator lights.
2. Press the right arrow until “CONT T = -XX.X” appears in the messagecenter.
3. Press up/down arrow to match the display to calibrated instrument.
4. Press Enter to store calibration.
5. Press the Mode key to return to Run or the right/left arrow to go tonext/previous parameter.
See Chart 2-1 for calibration process functions.
Temperature Stabilization Periods
Startup - Allow 12 hours for the temperature in the cabinet to stabilizebefore proceeding.
Already Operating - Allow at least 2 hours after the display reaches setpoint for temperature to stabilize before proceeding.
Note During calibration, the temperature display will not be available. s
If no keys are pressed for approximately 5 minutes while in Calibrationmode, the system will reset to Run mode.
Calibrate the ControlProbe
2-2 Model 8600 Series Thermo Scientific
Section 2Calibration
Press MODEto light CALIBRATE
indicator
Mode CONT T = -XX.X
Numbers increasePress MODE to moveto CONFIGURATIONmode
Numbers decrease
Press Enter
to save settingScroll for Parameters
Mode SAMPT = -XX.XScroll for Parameters
Press to returnto previous parameter
Press to returnto previous parameter
OptionalSample Probe
ControlProbe
To Calibrate:
Calibrate Mode
Numbers increase
Numbers decrease
Press Enter
to save setting
Chart 2-1
SYSTEM OK
Model 8600 Series 3-1Thermo Scientific
Section 3 Configuration
The Configuration Mode is used for testing and custom setup of thefreezer. The configuration functions listed and described below may notbe necessary in all applications, but are available if needed. See Chart 3-1for more detail.
The high alarm test is used to verify the high alarm will activate, shouldthe freezer temperature equal or exceed the high alarm set point.
1. Press the Mode key until Configuration indicator lights.
2. Press the right arrow until HI ALRM TEST is displayed in the messagecenter.
3. Press Enter to initiate the test.
The temperature on the display will begin to increase until the high alarmset point has been reached. The audible alarm sounds and the alarmindicator flashes. Press the Silence key to silence the alarm.
The low alarm test is used to verify the low alarm will activate, should thefreezer temperature equal or become less than the low alarm set point.
1. Press the Mode key until Configuration indicator lights.
2. Press the right arrow until LO ALRM TEST is displayed in themessage center.
3. Press Enter to initiate the test.
The temperature on the display will begin to decrease until the low alarmset point has been reached. The audible alarm sounds and the alarmindicator flashes. Press the Silence key to silence the alarm.
High Alarm Test
Low Alarm Test
3-2 Model 8600 Series Thermo Scientific
Section 3Configuration
System Battery Test To test the charge of the freezer battery:
1. Press the Mode key until Configuration indicator lights.
2. Press the right arrow until SYS BAT TEST is displayed in the messagecenter.
3. Press Enter to initiate the test.
TESTING BATT will display during the testing period. Upon completionof the test, the message center will display BATT GOOD or BATT FAILOn test failure, the audible alarm sounds, the alarm indicator and the LowBattery indicator light. Press the Silence key and the alarm indicator willgo out. The Low Battery light will stay on until a future battery test isperformed and passed.
To test the charge of the BUS battery:
1. Press the Mode key until Configuration indicator lights.
2. Press the right arrow until BUS BAT TEST is displayed in the messagecenter.
3. Press Enter to initiate the test.
TESTING BATT will display during the testing period. Upon completionof the test, the message center will display BBAT GOOD or BBAT FAILOn test failure, the audible alarm sounds, the alarm indicator and the LowBattery indicator light. Press the Silence key. The audible alarm and alarmindicator will go out. The Low Battery light will stay on. If this test fails, itis recommended to replace the BUS battery.
Bus Battery Test
Model 8600 Series 3-3Thermo Scientific
Section 3Configuration
This function, available on freezers with the optional sample probe, allowsthe user to select which probe temperature is displayed in the temperaturedisplay window. The options are CONTROL or SAMPLE.
1. Press the Mode key until Configuration indicator lights.
2. Press the right arrow until DISP CONTROL or DISP SAMPLE isdisplayed in the message center.
3. Press up/down arrow to toggle between the two display selections.
4. Press Enter to save.
If Control probe is selected, the temperature display is on continuously. IfSample probe is selected, the temperature display is preceded with an ‘S’.
Should a high stage alarm occurr, it may become necessary to clear thealarm condition after the condition has been corrected.
1. Press the Mode key until Configuration indicator lights.
2. Press the right arrow until CLR HS ALARM is displayed in themessage center.
3. Press Enter to clear the alarm.
To set the Access Code:
1. Press the Mode key until Configuration indicator lights.
2. Press the right arrow until “SET ACC CODE” is displayed in themessage center.
3. Press Enter.
4. The message center will display ACC CODE = 000. Press theup/down arrow until the desired access code is displayed (000 - 999).Press the left/right arrow to select digit 1, 2, 3.
Note Use the left and right arrow keys to move from the first through thethird digits within the access code. s
5. Press Enter to save the setting
6. Press the Mode key until Run indicator lights. A three-digit AccessCode can be entered to avoid unauthorized personnel changing setpoints, calibration, or configuration. A setting of 000 bypasses theaccess code. The factory setting is 000.
Display Temperature
Clear High StageAlarm
Set an Access Code
If the freezer is configured for RS-485 communications, it will need tohave a unique identification address. This address is set through theConfiguration mode.
1. Press the Mode key until Configuration indicator lights.
2. Press the right arrow until RS485ADDR is displayed in the messagecenter.
3. Press Enter. The message center will display 485 ADDR XX.
4. Press up/down arrow to select the appropriate address for the freezer(1 - 24).
4. Press Enter to save.
This function, available on freezers with the optional BUS (back-upsystem), allows the user to select the type of gas injected into thefreezer chamber. The options are CO2 and LN2.
1. Press the Mode key until Configuration indicator lights.
2. Press the right arrow until BUS TYPE CO2 or BUS TYPE LN2 isdisplayed in the message center.
3. Press up/down arrow to toggle between the two display selections.
4. Press Enter to save.
3-4 Model 8600 Series Thermo Scientific
Section 3Configuration
RS485 Address
Back-Up System Type
Model 8600 Series 3-5Thermo Scientific
Section 3Configuration
Press MODE
to light
CONFIGURATION
indicator
Mode
Mode SYS BAT TEST
LO ALRM TEST
Press MODE to move
to RUN modePress Enter
to initiate
test
Scroll for Parameters
Scroll for Parameters
Mode
HI ALRM TEST
Scroll for Parameters
Press to return
to previous parameter
Press to return
to previous parameter
Press to return
to previous parameter
Low Alarm
Test
High Alarm
Test
System Battery
Test
To Configure:
Mode
Scroll for Parameters
Chart 3-1
Press Enter
to initiate
test
Press Enter
to initiate
test
Press Enter
to initiate
test
Press to return
to previous parameter
Optional
BUS Battery
Test
BUS BAT TESTPress Enter
to initiate
test
Configuration Mode
SYSTEM OK
3-6 Model 8600 Series Thermo Scientific
Section 3Configuration
Press Mode to exit.
Press right or left arrow
to move to next digit.
Numbers increase
Numbers decrease
Mode CLR HS ALARM
Press Enter to
clear the alarm
conditionScroll for Parameters
Press to return
to previous parameter
refer to previous page
Configuration Mode, Chart 3-1, Page 2 of 2
Clear High
Stage Alarm
To Configure:
DISP CONTROL
CONTROL probe
Press Enter to
save the settingMode
Scroll for Parameters
Press to return
to previous parameter
Display
Temperature SAMPLE probe
Mode
Scroll for Parameters
ModePress Enter to
save the settingScroll for Parameters
Mode BUS TYPE CO2 Press Enter to
save the settingScroll for Parameters
Press to return
to previous parameter
Optional
Back Up
System Type
Mode RS485 ADDR
Scroll through the
various options.
Press Enter to
save the setting
Scroll for Parameters
Press to return
to previous parameter
RS-485
Address
Type CO2
Type LN2
Access
Code
SET ACC CODE XXX
Model 8600 Series 4-1Thermo Scientific
Section 4 Alarms
The Model 8600 Series freezer alarm system is shown in the table below.When an alarm is active, the message appears in the LED message center.Press the Silence key to mute the audible alarm for the ringback period.The visual alarm continue until the freezer returns to a normal condition.The alarms are momentary alarms only. When an alarm condition occurs,then returns to normal, the freezer automatically clears the alarm conditionand the message center.
If a 230V freezer is connected to a 120V power source or a 120V freezer isconnected to a 230V power source, the electronics detects an incorrectpower source connected to the freezer. Under this condition, the fans andcompressors will not turn on and an audible and visual alarm occur with"WRONG POWER" in the message center.
The “WRONG POWER” alarm may also occur if the battery switch isturned to Standby mode ( ) prior to applying power to the freezer. Theaudible and visual alarms remain until the freezer is connected to thecorrect power source.
Description Message Delay Ringback Relay
No alarm condition exists SYSTEM OK ---- ---- ----
Power Failure POWER FAIL 1 min. 15 min. Yes
High Temperature Alarm TEMP IS HIGH 1 min. 15 min. Yes
Low Temperature Alarm TEMP IS LOW 1 min. 15 min. Yes
Door Ajar DOOR IS OPEN 1 min. 15 min. No
Low Battery* LOW BATTERY 1 min. 12 hours No
Control Probe Failure PROBE 1 FAIL 1 min. 15 min. No
Heat Exchanger Probe Failure PROBE 2 FAIL 1 min. 15 min. No
Condenser Probe PROBE 3 FAIL 1 min. 15 min. No
Sample Probe Failure (optional) PROBE 4 FAIL 1 min. 15 min. No
High Stage System Failure HS SYST FAIL 1 min. 15 min. No
Condenser Hot Condition HOT CONDENSR 1 min. none No
Wrong Power WRONG POWER 0 min. none No
Voltage Compensation VCOMPEN FAIL 0 min. 15 min. No
Micro Board Failure MICRO FAIL 0 min. 15 min. No
All alarm delays and ringback times are ±30 seconds.*The automatic battery test runs 12 hours after initial start-up, then every 12 hours thereafter. A user-initiated batterytest can be performed from the Configuration menu. See Section 3.
Wrong Power Alarm
4-2 Model 8600 Series Thermo Scientific
Section 4Alarms
High Stage SystemFailure Alarm
This condition is created when the high stage compressor and fans run for30 minutes and are not capable of cooling the interstage heat exchanger tothe proper temperature. Under this condition, the high stage compressorand fans will turn off after 30 minutes and an audible and visual alarm willoccur along with the "HS SYST FAIL" message in the LED messagecenter.
If the freezer is compensating for high or low line voltage, the system willmeasure the compensated AC voltage. If the voltage is incorrect, the unitwill stop attempting to compensate, and the compressors will run on directline voltage. Under this condition, the message center will display“VCOMPEN FAIL”.
When multiple alarm conditions occur, active messages are displayed in themessage center one at a time, updating at 5 second intervals. PressingSilence during multiple alarms causes all active alarms to be silenced and toring back in 15 minutes.
An internal communications failure has occurred with the micro board.During this alarm, the compressor(s) attempt to run continuously.However, with this type of failure, freezer operation becomesundependable.
The microprocessor in Model 8600 Series freezers continually scans allprobes including the control probe, heat exchanger probe, condenser probeand optional sample probe to ensure that they are operating properly.Should an error be detected, the "PROBE # FAIL" alarm occurs. If anerror is detected with the control probe (PROBE 1 FAIL), the high andlow stage compressors runs continuously. As a result, the cabinettemperature decreases until it reaches the lowest temperature that therefrigeration system can maintain. If an error is detected with the heatexchanger probe (PROBE 2 FAIL), the freezer cycles properly at itstemperature set point using a 5 minute step start between the high and lowstage compressors. If an error is detected with the condenser probe(PROBE 3 FAIL) or optional sample probe (PROBE 4 FAIL), there is noimpact on the performance of the freezer. However, the hot condenseralarm may also occur when the condenser probe fails. Contact theTechnical Services Department (1-888-213-1790) or your local distributor.
Communication between the micro board and display has been lost. Underthis condition, the visual alarm flashes with dashes (----) in the temperaturedisplay. “Lost Comm’ flashes in the message center. Call Technical Services.
VoltageCompensation Alarm
Multiple Alarms
Micro Board FailureAlarm
Probe Failure Alarms
Lost CommunicationAlarm
Model 8600 Series 5-1Thermo Scientific
Section 5 Maintenance
Warning Avoid the excessive use of water around the control area due tothe risk of electrical shock. Damage to the controls may also result. s
Wipe down the freezer exterior using soap and water and a general uselaboratory disinfectant. Rinse thoroughly with clean water and dry with asoft cloth.
1. Open the door on the front of the unit, using the handle.
2. Locate the grille on the door. See Figure 1-4. Grasp the middle of thegrille material and gently pull out to remove.
3. Wash the filter material using water and a mild detergent.
4. Dry by pressing between two towels.
5. Install the filter back into the grille and attach the grille.
* Perform this procedure a minimum of four times per year. The clean filter alarmoccurs every three months as a reminder to clean the air filter. Depending uponenvironmental conditions, the filter may need to be cleaned or replaced morefrequently. If the filter becomes torn or excessively dirty, a replacement can bepurchased from Thermo. Order part number 760212.
1. Open the door on the front of the unit, using the handle.
2. Locate the condenser (Figure 1-4). Using a vacuum cleaner, exercisingcare to not damage the condenser fins, clean the condenser (minimumyearly*).
* Depending upon environmental conditions, the condenser may need to becleaned more frequently.
Clean Air Filter
Clean Condenser
5-2 Model 8600 Series Thermo Scientific
Section 5Maintenance
Clean Water-cooledCondenser
The water-cooled condenser can be cleaned-in-place by using the CIPprocedure. Cleaning solutions can be used, depending on type of depositsor build-up to be removed.
Caution Do not use liquids that are corrosive to stainless steel or thebrazing material (copper or nickel). s
1. Disconnect the unit from the water supply.
2. Drain the unit.
3 . Rinse with fresh water and drain the unit again.
4. Fill with fresh water.
5. Add cleaning agent (solution and concentration dependent on depositsor build-up).
6. Circulate cleaning solution (if feasible).
7. Drain the cleaning solution.
8. Add and circulate a passivating liquid for corrosion inhibition of platesurfaces.
9. Drain this liquid.
10. Rinse with fresh water and drain.
11. Reconnect the water supply and fill the unit.
12 . Return to service.
CIP (Clean-In-Place) Procedure
1. Remove all product and place it in another freezer.
2. Turn the unit off and disconnect it from the power source.
3. Turn off the battery switch(O). See Figure 5-1.
4. Open the lid and removesub-lids. Place towels on thechamber floor.
5. Allow the frost to melt andbecome loose.
6. Remove the frost with a softcloth.
7. After defrosting is complete, clean the interior with a non-chloridedetergent. Rinse thoroughly with clean water and dry with a soft cloth.
8. Plug unit in and turn power switch on.
9. Turn the battery power switch to Standby mode ( ).
10. Allow the freezer to operate empty overnight before reloading theproduct.
Using a soft cloth, remove any frost build-up from the gasket, sub-lids andlids (minimum monthly*). The clean gasket alarm occurs every threemonths as a reminder to remove frost build-up from the gasket and doors.Press the Silence key to mute the audible alarm.
*The lid gasket may need to be cleaned more frequently if dirt or excessive frostbuild-up prevents door from closing properly.
Model 8600 Series 5-3Thermo Scientific
Section 5Maintenance
Defrost Chamber
Figure 5-1. Locations
Clean Lid Gasket
Caution For a consistent and dependable charge, replace the battery every2 years. Replacement batteries must be rechargeable and are available fromThermo. Refer to the parts list for stock number and description of thereplacement batteries (part number 400159). Dispose of the used batteriesin a safe manner and in accordance with good environmental practices. s
1. Open the front door by grasping the handle and pulling.
2. Locate the battery power switch (Figure 5-1). Turn the battery powerswitch to the Off position (O).
3. Remove the four screws holding the recorder bezel to gain access to thebattery.
4. Remove the three nuts securing the battery bracket. See Figure 5-1.
5. Remove the bracket and old battery. Discard the battery. Install thebracket and the new battery. Secure.
6. Reconnect the battery (red to positive and black to negative).
7. Replace the recorder bezel.
8. Turn the battery power switch to Standby mode ( ).
9. Close lower panel door.
Defrost the unit as described previously. This prepares the unit for storage.Turn off the battery power switch (O). Turn off the freezer power switch.
Warning If the unit has been in service, turn it off and disconnect thepower cord connector before proceeding with any maintenance. s
5-4 Model 8600 Series Thermo Scientific
Section 5Maintenance
Replace Battery(s)
Prepare Unit forStorage
Model 8600 Series 5-5Thermo Scientific
Section 5Maintenance
Preventive MaintenanceModel 8600 Series Freezers
Your equipment has been thoroughly tested and calibrated before shipment. Regular preventive maintenance isimportant to keep your unit functioning properly. The operator should perform routine cleaning andmaintenance on a regular basis. For maximum performance and efficiency, it is recommended that the unit bechecked and calibrated periodically by a qualified service technician.
The following is a condensed list of preventive maintenance requirements. See the specified section of theoperating manual for further details.
We have qualified service technicians, using NIST traceable instruments, available in many areas. For moreinformation on Preventive Maintenance or Extended Warranties, please contact us at the number below.
Cleaning and calibration adjustment intervals are dependent upon use, environmental conditions and accuracyrequired.
Tips:• Fill an upright by starting at the bottom near the probe and add racks to one shelf at a time. Allow freezer to
recover to set point between shelves.• Fill a chest by starting at the left side near the probe. Filling with room temperature racks will result in a long
pull-down time.• Fill unit with frozen product to help overall performance; frozen water jugs, for example.• Always make certain the vacuum relief port is free of frost and ice, to allow for timely re-entry into the freezer
after a door opening.
Refer to ManualSection Action Monthly Yearly Every 2 Years
-- Verify ambient temperature, <90°F 4
-- * Adjust door handle for firm latching, as needed 4
Figure 1-4 for probe location5
Check and clean probe cover, gaskets hinges and lid(s) of ice andsnow
4
More frequent cleaningmay be required, depend-ing on use and environ-mental conditions
5. Check air filter. Clean or replace as needed 4
3 Check alarm back-up battery. 4 ** Replace
-- Check condenser fan motor for unusual motor noise or vibration 4
2 * Verify and document calibration, at the minimum, annually 4
5 * Clean condenser compartment and wipe off condenser 4
* Qualified service technicians only
** Dispose of properly, according to all state and federal regulations
Section 6 Factory Installed Options
Information about each of the factory installed options follow.
Before installation of BUS components, make sure the power to the freezeris disconnected, the battery switch is turned off (O) and the freezer haswarmed to ambient temperature.
The built-in BUS (back up system) will keep the freezer chambertemperature below the critical level in the event of a power or equipmentfailure. If power to the freezer fails, or temperature increases to the back upalarm set point, the BUS injects liquefied gas into the chamber to keep thechamber temperature within the specified range.
The BUS operates on an internal 12-volt, rechargeable battery which iskept charged during normal operation by the integral battery charger.
1. Locate the mounting hole forinstalling the injection teeassembly. See Figure 6-1.
Note Cover the open end ofinjection assembly with tape tokeep insulation from entering thenipple. s
2. Slide 3/8” flatwasher overopen end of nipple.
3. Insert the covered end of the injection assembly through exterior hole.
4. Remove the tape covering the end of the nipple and install the 1/8”NPT brass tee on the open end of the nipple. Place Permagum sealantbetween the brass tee and the chamber ceiling.
5. On the interior, seal around the injection assembly with Permagum.
Model 8600 Series 6-1Thermo Scientific
BUS (Back Up System)P/N 195943, 195945
Injection AssemblyInstallation
Figure 6-1. Mounting Hole Location
6. Install the transfer hose connecting one end to the injection assembly,the other end to the solenoid valve. Install the solenoid valve to thesupply source. The solenoid mounting bracket is not required and maybe discarded.
Caution When selecting a CO2 supply cylinder, it must be equipped with asiphon tube. s
1. Plug the solenoid/probe connector into the BUS connection. Loop theprobe wire back into the base/side car. Secure the connector with ascrew on the ends of connector. The connector is keyed.
2. Route the temperature probe through the probe port. The probe portis located in the upper right corner (viewed from the side) of 12.7, 17and 20 cu. ft. models.
3. Carefully remove the existing Permagum sealant from around theprobe port opening.
6-2 Model 8600 Series Thermo Scientific
Section 6Factory Options
Figure 6-2. Injection Assembly
Temperature ProbeInstallation
probewires
Figure 6-3. Probe and Solenoid Wiring
Injection AssemblyInstallation (continued)
Model 8600 Series 6-3Thermo Scientific
Section 6Factory Options
4. Open the freezer lid and locate the probe cover on the upper front leftwall. Remove the two Phillips head screws securing the probe cover(see Figure 6-4).
5. Route the BUS probe through the probe port (Figure 6-5),approximately 12”. Secure the back-up probe to the temperature probeusing a small tie wrap (Figure 6-4).
1. Seal around the interior and exterior opening of the probe port withPermagum sealant.
2. Reinstall the probe cover (Figure 6-5).
3. Carefully coil the extra probe lead in the compressor compartment,and secure it to the compartment wall with a tie wrap and tie wrapanchor provided. Additional tie wraps and anchors may be used tosecure the probe lead to the exterior back wall of the freezer.
4. Loosen the terminal screws on the solenoid. Slide the spade lugconnectors under the screws and tighten to secure.
5. Connect power to the freezer. Turn the freezer On, with battery switchOff (O).
a. The Solenoid Engaged light on the BUS control panel willilluminate (no injection occurs). This light stays on until the unitis below BUS setpoint.
b. The Low Battery indicator may also illuminate.
6. Turn the battery switch to Standby mode ( ) to charge both batteries.
Temperature ProbeInstallation (continued)
Connect Probe/ SolenoidHarness
Figure 6-5. Probe Access CoverFigure 6-4. Probe and Probe Cover
Warning When activated, this unit injects liquid nitrogen or carbondioxide. Liquid nitrogen can cause serious freezing (frostbite) if it comesin contact with unprotected skin or eyes. Nitrogen suppresses oxygenlevels and may cause suffocation if area is not well ventilated. Refer toAppendix A for the proper handling of liquid LN2. s
Caution Make sure the pressure relief valve on any LN2 tank is adjusted to30 PSI maximum blow-off. s
Warning Carbon dioxide gas suppresses oxygen levels and may causesuffocation if area is not well ventilated. Refer to “Handling Liquid CO2 inAppendix B of this manual. s
Power - indicates the unit has AC power. Low Battery - battery charge is low. The battery needs replaced or
recharged.Solenoid Engaged - BUS has opened the solenoid so it can inject gas (CO2
or LN2).Press-To-Test - Activates the solenoid and injects LN2 or CO2 into the
freezer chamber as long as the button is depressed. The solenoid engagedindicator should light. If the Low Battery indicator lights during the test,replace the BUS battery.
Note Solenoid will not engage if lid is open. s
The optional back up system is designed to inject CO2 or LN2 into thefreezer compartment if the temperature rises above back up system setpoint. To set the BUS set point:
1. Press the Mode key until the Settings indicator lights.
2. Press the right arrow until “BACKUP = -XX” is displayed in themessage center.
3. Press up or down arrow key until desired BUS set point is displayed.
4. Press Enter to save the setting.
5. Press the Mode key until the Run indicator lights or press the right orleft arrow to go to the next or previous parameter.
If no control keys are pressed, the freezer automatically returns to RUNmode after 5 minutes.
6-4 Model 8600 Series Thermo Scientific
Section 6Factory Options
BUS Control Panel
Set Optional BUSSetPoint
Figure 6-6. BUS Control Panel
After the freezer has stabilized and both batteries are fully charged, theBUS can be tested to verify proper operation.
1. Disconnect the AC power to the freezer by turning power switch off.
2. As the freezer warms up, verify the BUS injects at the desiredtemperature. Displayed temperature may vary by a few degrees frominject temperature due to the differences in probe locations.
Caution Changing the operating temperature set point can affect the BUSset point. The BUS set point will self adjust to maintain a temperature ofat least 10°C above the operating temperature set point. s
Caution The BUS set point can not be set any colder than the hightemperature alarm set point (see Section 1). If the back-up system isinstalled with CO2, then -65°C is the coldest BUS set point that can beused (if the cabinet set point is -75°C or colder). s
To disconnect the freezer back-up from the gas supply:
1. Close the supply valve.
2. Press the test button on the Back-Up System control box to remove thegas from the line.
3. Slowly disconnect the fitting assembly from the supply (in the eventthat any gas remains in the line).
Information for using the chart recorder follows.
1. Open the plastic door of the recorder and press button #3 until the penbegins to move outward.
2. Unscrew the knob at the center of the chart and remove the paper.
3. Install the new chart paper, position the paper to the correct time lineand replace the knob.
4. Remove the cap from the felt pen and press button #3.
Model 8600 Series 6-5Thermo Scientific
Section 6Factory Options
Disconnect BUS FromGas Supply
Chart Recorder
Install Chart Paper
Test the BUS
The chart recorder contains eight temperature ranges and is factory-programmed for the freezer.
1. Press and hold button #3 for one second, then let the pen move off thechart paper.
2. Press and hold for five seconds either button #1 or button #2.
3. Release the button and the green LED will begin to flash. Count thenumber of flashes to determine the present program setting.
4. To change the program setting, press theleft or right arrows to increase or decreasethe count.
5. When the desired program number isflashing, press button #3 to bring the penarm back onto the chart. Recording willbegin in the new program.
Note Changing ranges may require an offset calibration. s
Note The recorder must be in service for 24 hours before performing thefollowing calibration procedure. s
1. Place an accurate thermometer in the chamber next to the recorderprobe.
2. Temperature probes for the recorder are located in the left front cornerof the freezer chamber (Figure 1-3).
3. After about three minutes, compare the thermometer reading with thechart recorder reading.
4. If an adjustment is necessary, press the #1 button to move the pen tothe left or the #2 to move the pen to the right. The button must beheld about five seconds before the pen begins to move. Release thebutton when the pen position matches the thermometer.
Note The felt-tip pen on the recorder requires periodic replacement.Usually the ink will appear to fade before replacement becomes necessary.Additional pen tips may be purchased from Thermo. s
6-6 Model 8600 Series Thermo Scientific
Section 6Factory Options
Change Recorder Range
Program From To
1 -40 30°C2 0 60°C3 -100 38°C4 -5 50°C5 0 100°C6 -100 200°C7 -115 50°C8 -10 70°C
Calibrate Recorder
Dataloggers and ELPRO evaluation software provide monitoring anddocumentation of temperature and alarm conditions. The dataloggers havea memory capacity of 64,000 measured values or data points. Temperatureis measured, stored and displayed. Alarm conditions are recorded.Evaluation software permits data to be downloaded to a PC. A variety ofstatistical information is provided through calculations, analysis, graphsand printed reports. Refer to the ELPRO documentation for operatinginstructions for the datalogger.
The water-cooled condenser (P/N 195967) is a factory installed optionand requires a qualified technician at freezer installation. The installationshould include proper adjustment of the regulating valve, which controlsthe discharge pressure. Specifications are displayed in Table 6-1.
Model 8600 Series 6-7Thermo Scientific
Section 6Factory Options
Datalogger
Water-cooledCondenser
Water Source Tower City
Water Pressure Not to exceed 150 psig
Water Temperature Range Not to exceed 29.4C (85F)
Inlet Connection 0.5” compression
Outlet Connection 0.5” compression
Flow Rate Required 3.0 gallons (11.4 liters) per minute 1.0 gallon (3.8 liters) per minute
Drain Required No (return line is required) Yes
Table 6-1. Specifications for Water-cooled Condenser Option
Section 7 Specifications
Model 8600 Series 7-1Thermo Scientific
Model 8615 8612
Temperature Range -50°C(-58°F) to -86°C(-123°F) in an 18C to 32C * (64.4F to 89.6F) ambient
Exterior Dimensions72.0”W x 40.5” H x 28.8” F-B(182.9cm x 102.9cm x 73.2cm)Add 7.9” (20.1cm) to F-B for wall spacer/handle.
Interior Dimensions42.5”W x 28.0”H x 18.5” F-B(108.0cm x 71.1cm x 47.6cm)
Capacity 12.7 cu. ft. (360 liters)
Refrigeration Cascade system, (2) hermetically-sealed compressors
Insulation Non CFC, foamed-in-place urethane: 5.0" (12.7cm) cabinet; 2.0" (5.0cm) lid;1.0" (12.5cm) sub-lids
Electrical120VAC, 1 PH, 60 Hz, 16.0 FLAOperating Range: 108VAC-130VAC
230VAC, 1 PH, 50/60 Hz, 12.0 FLAOperating Range: 208VAC-240VAC
Breaker Requirements 20 Amp, 120VAC, Dedicated Circuit,20 Amp Time Delay Breaker
15 Amp, 230VAC, Dedicated Circuit,15 Amp Time Delay Breaker
Shipping Weight 716 lbs. ( 324.8 kg)
Model 8618 8619
Temperature Range -50°C(-58°F) to -86°C(-123°F) in an 18C to 32C * (64.4F to 89.6F) ambient
Exterior Dimensions87.6.0”W x 40.5” H x 28.8” F-B(222.5cm x 102.9cm x 73.2cm)Add 7.9” (20.1cm) to F-B for wall spacer/handle.
Interior Dimensions58.8”W x 28.0”H x 18.5” F-B(149.4cm x 71.1cm x 47.0cm)
Capacity 17.0 cu. ft. (481.4 liters)
Refrigeration Cascade system, (2) hermetically-sealed compressors
Insulation Non CFC, foamed-in-place urethane: 5.0" (12.7cm) cabinet; 2.0" (5.0cm) lid;1.0" (12.5cm) sub-lids
Electrical120VAC, 1 PH, 60 Hz, 16.0 FLAOperating Range: 108VAC-130VAC
230VAC, 1 PH, 50/60 Hz, 12.0 FLAOperating Range: 208VAC-240VAC
Breaker Requirements 20 Amp, 120VAC, Dedicated Circuit,20 Amp Time Delay Breaker
15 Amp, 230VAC, Dedicated Circuit,15 Amp Time Delay Breaker
Shipping Weight 821 lbs. ( 372.4 kg)
CertificationsDeclaration of Conformity is available from the factory
Safety SpecificationsIndoor Use OnlyAltitude - up to 2,000 metersTemperature - 5°C to 43°CHumidity - Maximum RH 80% for temperatures up to 31°C, decreasing lin-early to 50% RH at 40°CMains Supply Fluctuations - Mains supply voltage fluctuations not to exceed±10% of the nominal voltageInstallation Category II 1
Pollution Degree 2 2
Class of Equipment I
1 Installation category (overvoltage category) defines the level of transient overvoltagewhich the instrument is designed to withstand safely. It depends on the nature of theelectricity supply and its overvoltage protection means. For example, in CAT II which isthe category used for instruments in installations supplied from a supply comparable topublic mains such as hospital and research laboratories and most industrial laboratories,the expected transient overvoltage is 2500V for a 230V supply and 1500V for a 120Vsupply.
2 Pollution degree describes the amount of conductive pollution present in theoperating environment. Pollution degree 2 assumes that normally only non-conductivepollution such as dust occurs with the exception of occasional conductivity caused bycondensation.
7-2 Model 8600 Series Thermo Scientific
Section 7Specifications
Model 8621 8620
Temperature Range -50°C(-58°F) to -86°C(-123°F) in an 18C to 32C * (64.4F to 89.6F) ambient
Exterior Dimensions96.0”W x 40.5” H x 28.8” F-B(243.8cm x 102.9cm x 73.2cm)Add 7.9” (20.1cm) to F-B for wall spacer/handle.
Interior Dimensions66.5”W x 28.0”H x 18.5” F-B(168.9cm x 71.1cm x 47.6cm)
Capacity 20.0 cu. ft. (566.3 liters)
Refrigeration Cascade system, (2) hermetically-sealed compressors
Insulation Non CFC, foamed-in-place urethane: 5.0" (12.7cm) cabinet; 2.0" (5.0cm) lid;1.0" (12.5cm) sub-lids
Electrical120VAC, 1 PH, 60 Hz, 16.0 FLAOperating Range: 108VAC-130VAC
230VAC, 1 PH, 50/60 Hz, 12.0 FLAOperating Range: 208VAC-240VAC
Breaker Requirements 20 Amp, 120VAC, Dedicated Circuit,20 Amp Time Delay Breaker
15 Amp, 230VAC, Dedicated Circuit,15 Amp Time Delay Breaker
Shipping Weight 833 lbs. ( 377.8 kg)
Model 8600 Series 8-1Thermo Scientific
Section 8Spare Parts
8-2 Model 8600 Series Thermo Scientific
Section 8Spare Parts
8615-200-1-B Rev. 1Page 1 of 2
CHEST FREEZER LID ASSEMBLY
Model 8600 Series 8-3Thermo Scientific
Section 8Spare Parts
8615-200-1-B Rev. 1Page 2 of 2
CHEST FREEZER LID ASSEMBLY
8-4 Model 8600 Series Thermo Scientific
Section 8Spare Parts
Model 8600 Series 8-5Thermo Scientific
Section 8Spare Parts
Exploded PartsDrawing
12.7, 17 & 20 cu ftChest Sidecar
8615-200-3-B Rev. 5Page 1 of 2
8-6 Model 8600 Series Thermo Scientific
Section 8Spare Parts
Model 8600 Series 8-7Thermo Scientific
Section 8Spare Parts
Exploded PartsDrawing
12.7, 17 & 20 cu ftChest Sidecar
8615-200-3-B Rev. 5Page 2 of 2
Exploded ViewDrawing
230V Relay EnclosureAssembly
8602-204-1-D Rev. 5Page 1 of 2
Part Number
Quantity
8-8 Model 8600 Series Thermo Scientific
Section 8Spare Parts
Model 8600 Series 8-9Thermo Scientific
Section 8Spare Parts
Exploded ViewDrawing
230V Relay EnclosureAssembly
8602-204-1-D Rev. 5Page 2 of 2
Exploded ViewDrawing
120V Relay EnclosureAssembly
8602-204-2-D Rev. 5Page 1 of 2
8-10 Model 8600 Series Thermo Scientific
Section 8Spare Parts
Exploded ViewDrawing
120V Relay EnclosureAssembly
8602-204-2-D Rev. 5Page 2 of 2
Model 8600 Series 8-11Thermo Scientific
Section 8Spare Parts
Model 8600 Series 9-1Thermo Scientific
Section 9Refrigeration Schematics
9-2 Model 8600 Series Thermo Scientific
Section 9Refrigeration Schematics
Model 8600 Series 9-3Thermo Scientific
Section 9Refrigeration Schematics
Model 8600 Series 10-1Thermo Scientific
Section 10Electrical Schematics
10-2 Model 8600 Series Thermo Scientific
Section 10Electrical Schematics
Model 8600 Series 10-3Thermo Scientific
Section 10Electrical Schematics
10-4 Model 8600 Series Thermo Scientific
Section 10Electrical Schematics
Model 8600 Series 10-5Thermo Scientific
Section 10Electrical Schematics
10-6 Model 8600 Series Thermo Scientific
Section 10Electrical Schematics
Model 8600 Series 11-1Thermo Scientific
Section 11Warranty Information
THER
MO F
ISHE
R SC
IENT
IFIC
900 &
8600
SER
IES
ULT
FREE
ZER
WAR
RANT
YT
he
Warr
an
ty P
erio
d s
tart
s t
wo
we
eks f
rom
th
e d
ate
yo
ur
eq
uip
me
nt
is s
hip
pe
d f
rom
ou
r fa
cili
ty.
Th
is a
llow
s f
or
sh
ipp
ing
tim
e s
o t
he
wa
rra
nty
will
go
in
to e
ffe
ct
at
ap
pro
xim
ate
ly t
he
sa
me
tim
e y
ou
r e
qu
ipm
en
t is
de
live
red
. T
he
wa
rra
nty
pro
tectio
n
exte
nds t
o a
ny s
ubsequent
ow
ner
during t
he w
arr
anty
period.
Du
rin
g t
he
first
two
ye
ars
of
the
wa
rra
nty
pe
rio
d,
co
mp
on
en
t part
s p
rove
n t
o b
e n
on
-co
nfo
rmin
g in
ma
teria
ls o
r w
ork
ma
nsh
ip
will
be r
epaired o
r re
pla
ced a
t T
herm
o's
expense,
labor
inclu
ded.
The 9
00 S
eries U
LT
Fre
ezers
inclu
de a
n a
dditio
nal tw
o
ye
ar
wa
rra
nty
on
th
e c
om
pre
sso
rs,
part
s o
nly
, F.O
.B.
facto
ry.
Th
e 8
60
0 S
erie
s U
LT
Fre
eze
rs in
clu
de
an
ad
ditio
na
l th
ree
ye
ar
wa
rra
nty
on
th
e c
om
pre
sso
rs,
part
s o
nly
, F.O
.B.
facto
ry.
Insta
llatio
n a
nd
ca
libra
tio
n is n
ot
co
ve
red
by t
his
wa
rra
nty
ag
ree
-
me
nt.
Th
e T
ech
nic
al S
erv
ice
s D
epa
rtm
en
t m
ust
be
co
nta
cte
d f
or
wa
rra
nty
de
term
ina
tio
n a
nd
dire
ctio
n p
rio
r to
an
y w
ork
be
ing
pe
rfo
rme
d.
Exp
en
da
ble
ite
ms,
i.e
., g
lass,
filte
rs,
pilo
t lig
hts
, lig
ht
bu
lbs a
nd
do
or
ga
ske
ts a
re e
xclu
de
d f
rom
th
is w
ar-
ran
ty.
In a
dditio
n t
o t
he s
tandard
warr
anty
, th
e f
oam
ed-in-p
lace c
abin
et
desig
n c
arr
ies a
unit p
roduction lifetim
e w
arr
anty
(fo
am
ed-
in-p
lace
ca
bin
et,
eva
po
rato
r a
nd
fo
am
ed
-in
-pla
ce
do
or;
part
s o
nly
). P
lea
se
co
nta
ct
yo
ur
sa
les r
ep
rese
nta
tive
or
Th
erm
o f
or
additio
nal in
form
ation.
Re
pla
ce
me
nt
or
repa
ir o
f co
mp
on
en
t part
s o
r e
qu
ipm
en
t u
nd
er
this
wa
rra
nty
sh
all
no
t e
xte
nd
th
e w
arr
an
ty t
o e
ith
er
the
equip
ment
or
to t
he c
om
ponent
part
beyond t
he o
rigin
al tw
o y
ear
warr
anty
period.
The T
echnic
al S
erv
ices D
epart
ment
must
giv
e p
rior
appro
val fo
r th
e r
etu
rn o
f any c
om
ponents
or
equip
ment.
TH
IS W
AR
RA
NT
Y I
S E
XC
LU
SIV
E A
ND
IN
LIE
U O
F A
LL O
TH
ER
WA
RR
AN
TIE
S,
WH
ET
HE
R W
RIT
TE
N,
OR
AL
, O
R
IMP
LIE
D.
NO
WA
RR
AN
TIE
S O
F M
ER
CH
AN
TA
BIL
ITY
OR
FIT
NE
SS
FO
R A
PA
RT
ICU
LA
R P
UR
PO
SE
SH
AL
L A
PP
LY.
Therm
o s
hall
not
be lia
ble
for
any indirect
or
consequential dam
ages inclu
din
g,
without
limitation,
dam
ages r
ela
ting t
o lost
pro
fits
or
loss o
f pro
ducts
.
Your
local T
herm
o S
ale
s O
ffic
e is r
eady t
o h
elp
with c
om
pre
hensiv
e s
ite p
repara
tion info
rmation b
efo
re y
our
equip
ment
arr
ives.
Printe
d instr
uction m
anuals
care
fully
deta
il equip
ment
insta
llation,
opera
tion,
and p
reventive m
ain
tenance.
If e
quip
ment
serv
ice is r
equired,
ple
ase c
all
your
Technic
al S
erv
ices D
epart
ment
at
1-8
00-4
38-4
851 (
US
A a
nd C
anada)
or
1-7
40-3
73-4
763.
We're r
eady t
o a
nsw
er
your
questions o
n e
quip
ment
warr
anty
, opera
tion,
main
tenance,
serv
ice,
and
spe-
cia
l a
pp
lica
tio
ns.
Ou
tsid
e t
he
US
A c
on
tact
yo
ur
loca
l d
istr
ibu
tor
for
wa
rra
nty
in
form
atio
n.
ISO
9001
REGI
STER
EDR
ev.
4
4/0
9
11-2 Model 8600 Series Thermo Scientific
Section 11Warranty Information
THER
MO FI
SHER
SCIEN
TIFIC
900 &
8600
SERIE
S ULT
FREE
ZER
INTER
NATIO
NAL D
EALE
R WA
RRAN
TYT
he
Warr
an
ty P
erio
d s
tart
s t
wo
mo
nth
s f
rom
th
e d
ate
yo
ur
eq
uip
me
nt
is s
hip
pe
d f
rom
ou
r fa
cili
ty.
Th
is a
llow
s f
or
sh
ipp
ing
tim
e
so
th
e w
arr
an
ty w
ill g
o in
to e
ffe
ct
at
ap
pro
xim
ate
ly t
he
sa
me
tim
e y
ou
r e
qu
ipm
en
t is
de
live
red
. T
he
wa
rra
nty
pro
tectio
n
exte
nds t
o a
ny s
ubsequent
ow
ner
during t
he w
arr
anty
period.
Deale
rs w
ho s
tock o
ur
equip
ment
are
allo
wed a
n a
dditio
nal fo
ur
month
s f
or
deliv
ery
and insta
llation,
pro
vid
ing t
he w
arr
anty
card
is c
om
ple
ted a
nd r
etu
rned t
o t
he T
echnic
al S
erv
ices
De
pa
rtm
en
t.
Du
rin
g t
he
first
two
ye
ars
of
the
wa
rra
nty
pe
rio
d,
co
mp
on
en
t part
s p
rove
n t
o b
e n
on
-co
nfo
rmin
g in
ma
teria
ls o
r w
ork
ma
nsh
ip
will
be r
epaired o
r re
pla
ced a
t T
herm
o's
expense,
labor
exclu
ded.
The 9
00 S
eries U
LT
Fre
ezers
inclu
de a
n a
dditio
nal tw
o
ye
ar
wa
rra
nty
on
th
e c
om
pre
sso
rs,
part
s o
nly
, F.O
.B.
facto
ry.
Th
e 8
60
0 S
erie
s U
LT
Fre
eze
rs in
clu
de
an
ad
ditio
na
l th
ree
ye
ar
wa
rra
nty
on
th
e c
om
pre
sso
rs,
part
s o
nly
, F.O
.B.
facto
ry.
Insta
llatio
n a
nd
ca
libra
tio
n is n
ot
co
ve
red
by t
his
wa
rra
nty
ag
ree
me
nt.
The T
echnic
al S
erv
ices D
epart
ment
must
be c
onta
cte
d f
or
warr
anty
dete
rmin
ation a
nd d
irection p
rior
to a
ny w
ork
bein
g p
er-
form
ed
. E
xp
en
da
ble
ite
ms,
i.e
., g
lass,
filte
rs,
pilo
t lig
hts
, lig
ht
bu
lbs a
nd
do
or
ga
ske
ts a
re e
xclu
de
d f
rom
th
is w
arr
an
ty.
In a
dditio
n t
o t
he s
tandard
warr
anty
, th
e f
oam
ed-in-p
lace c
abin
et
desig
n c
arr
ies a
unit p
roduction lifetim
e w
arr
anty
(fo
am
ed-in
-
pla
ce
ca
bin
et,
eva
po
rato
r a
nd
fo
am
ed
-in
-pla
ce
do
or;
part
s o
nly
). P
lea
se
co
nta
ct
yo
ur
sa
les r
ep
rese
nta
tive
or
Th
erm
o f
or
ad
di-
tional in
form
ation.
Re
pla
ce
me
nt
or
repair o
f co
mp
on
en
t part
s o
r e
qu
ipm
en
t u
nd
er
this
wa
rra
nty
sh
all
no
t e
xte
nd
th
e w
arr
an
ty t
o e
ith
er
the
eq
uip
-
me
nt
or
to t
he
co
mp
on
en
t part
be
yo
nd
th
e o
rig
ina
l tw
o y
ea
r w
arr
an
ty p
erio
d.
Th
e T
ech
nic
al S
erv
ice
s D
epa
rtm
en
t m
ust
giv
e
prior
appro
val fo
r th
e r
etu
rn o
f any c
om
ponents
or
equip
ment.
TH
IS W
AR
RA
NT
Y I
S E
XC
LU
SIV
E A
ND
IN
LIE
U O
F A
LL O
TH
ER
WA
RR
AN
TIE
S,
WH
ET
HE
R W
RIT
TE
N,
OR
AL
, O
R
IMP
LIE
D.
NO
WA
RR
AN
TIE
S O
F M
ER
CH
AN
TA
BIL
ITY
OR
FIT
NE
SS
FO
R A
PA
RT
ICU
LA
R P
UR
PO
SE
SH
AL
L A
PP
LY.
Therm
o s
hall
not
be lia
ble
for
any indirect
or
consequential dam
ages inclu
din
g,
without
limitation,
dam
ages r
ela
ting t
o lost
pro
fits
or
loss o
f pro
ducts
.
Your
local T
herm
o S
ale
s O
ffic
e is r
eady t
o h
elp
with c
om
pre
hensiv
e s
ite p
repara
tion info
rmation b
efo
re y
our
equip
ment
arr
ives.
Printe
d instr
uction m
anuals
care
fully
deta
il equip
ment
insta
llation,
opera
tion,
and p
reventive m
ain
tenance.
If e
qu
ipm
en
t se
rvic
e is r
eq
uire
d,
ple
ase
co
nta
ct
yo
ur
loca
l d
istr
ibu
tor
or
Th
erm
o (
1-8
00-4
38-4
851 in U
SA
and C
anada,
or
1-7
40-3
73-4
763).
We're r
eady t
o a
nsw
er
your
questions o
n e
quip
ment
warr
anty
, opera
tion,
main
tenance,
serv
ice,
and s
pecia
l
ap
plic
atio
ns.
Ou
tsid
e t
he
US
A,
co
nta
ct
yo
ur
loca
l d
istr
ibu
tor
for
wa
rra
nty
in
form
atio
n.
ISO
9001
REGI
STER
EDR
ev.
4
4/0
9
Model 8600 Series 12-1Thermo Scientific
Appendix A Handling Liquid Nitrogen
Warning Contact of liquid nitrogen or cold gas with the skin or eyes maycause serious freezing (frostbite) injury. s
Handle liquid nitrogen carefully. The extremely low temperature can freeze human flesh very rapidly. Whenspilled on a surface the liquid tends to cover it completely and intimately,cooling a large area. The gas issuing from the liquid is also extremely cold.Delicate tissue, such as that of the eyes, can be damaged by an exposure tothe cold gas which would be too brief to affect the skin of the hands orface.
Never allow any unprotected part of your body to touch objects cooledby liquid nitrogen. Such objects may stick fast to the skin and tear the flesh when you attemptto free yourself. Use tongs to withdraw objects immersed in the liquid,and handle the object carefully.
Wear protective clothing. Protect your eyes with a face shield or safety goggles (safety glasses withoutside shields do not give adequate protection). Always wear gloves whenhandling anything that is, or may have been, in immediate contact withliquid nitrogen. Insulated gloves are recommended, but heavy leathergloves may also be used. The gloves should fit loosely, so that they can bethrown off quickly if liquid should splash into them. When handlingliquid in open containers, it is advisable to wear high-top shoes. Trousers(which should be cuffless if possible) should be worn outside the shoes.
12-2 Model 8600 Series Thermo Scientific
Section 12Appendix A
The safe handling and use of liquid nitrogen in cryogenic refrigerators anddewar flasks is largely a matter of knowing the potential hazards and usingcommon-sense procedures based on that knowledge. There are twoimportant properties of liquid nitrogen that present potential hazards:
1. It is extremely cold. At atmospheric pressure, liquid nitrogen boils at -320°F (-196°C).
2. Very small amounts of liquid vaporize into large amounts of gas. Oneliter of liquid nitrogen becomes 24.6cu. ft. (700l) of gas.
The safety precautions in this appendix must be followed to avoid potentialinjury or damage which could result from these two characteristics. Donot attempt to handle liquid nitrogen until you read and fully understandthe potential hazards, their consequences, and the related safetyprecautions. Keep this booklet handy for ready reference and review.
Note Because argon is an inert gas whose physical properties are verysimilar to those of nitrogen, the precautions and safe practices for thehandling and use of liquid argon are the same as for liquid nitrogen. s
Use only containers designed for low temperature liquids. Cryogenic containers are specifically designed and made of materials thatcan withstand the rapid changes and extreme temperature differencesencountered in working with liquid nitrogen. Even these special containersshould be filled SLOWLY to minimize the internal stresses that occurwhen any material is cooled. Excessive internal stresses can damage thecontainer.
Do not cover or plug the entrance opening of any liquid nitrogen refrig-erator or dewar. Do not use any stopper or other device that wouldinterfere with venting of gas. These cryogenic liquid containers are generally designed to operate withlittle or no internal pressure. Inadequate venting can result in excessive gaspressure which could damage or burst the container. Use only the loose-fitting necktube core supplied or one of the approved accessories forclosing the necktube. Check the unit periodically to be sure that venting isnot restricted by accumulated ice or frost.
Introduction
Model 8600 Series 12-3Thermo Scientific
Section 12Appendix A
Use proper transfer equipment. Use a phase separator or special filling funnel to prevent splashing andspilling when transferring liquid nitrogen into or from a dewar orrefrigerator. The top of the funnel should be partly covered to reducesplashing. Use only small, easily-handled dewars for pouring liquid. Forthe larger, heavier containers, use a cryogenic liquid withdrawal device totransfer liquid from one container to another. Be sure to followinstructions supplied with the withdrawal device. When liquid cylindersor other large storage containers are used for filling, follow the instructionssupplied with those units and their accessories.
Do not overfill containers. Filling above the bottom of the necktube (or specified maximum level) canresult in overflow and spillage of liquid when the necktube core or cover isplaced in the opening.
Never use hollow rods or tubes as dipsticks. When a warm tube is inserted into liquid nitrogen, liquid will spout fromthe top of the tube due to gasification and rapid expansion of liquid insidethe tube.
Warning Nitrogen gas can cause suffocation without warning! s
Store and use liquid nitrogen only in a well-ventilated place. As the liquid evaporates, the resulting gas tends to displace the normal airfrom the area. In closed areas, excessive amounts of nitrogen gas reducethe concentration of oxygen and can result in asphyxiation. Becausenitrogen gas is colorless, odorless and tasteless, it cannot be detected by thehuman senses and will be breathed as if it were air. Breathing anatmosphere that contains less than 18% oxygen can cause dizziness andquickly result in unconsciousness and death.
Note The cloudy vapor that appears when liquid nitrogen is exposed to theair is condensed moisture, not the gas itself. The issuing gas is invisible. s
Never dispose of liquid nitrogen in confined areas or places whereothers may enter. Disposal of liquid nitrogen should be done outdoors in a safe place. Pourthe liquid slowly on gravel or bare earth where it can evaporate withoutcausing damage. Do not pour the liquid on pavement.
Introduction(continued)
12-4 Model 8600 Series Thermo Scientific
Section 12Appendix A
Appendix B Handling Liquid CO2
Warning High concentrations of CO2 gas can cause asphyxiation! OSHAStandards specify that employee exposure to carbon dioxide in any eight-hour shift of a 40-hour work week shall not exceed the eight-hour timeweighted average of 5000 PPM (0.5% CO2). The short term exposurelimit for 15 minutes or less is 30,000 PPM (3% CO2). Carbon dioxidemonitors are recommended for confined areas where concentrations ofcarbon dioxide gas can accumulate. s
Store and use liquid CO2 only in a well-ventilated place. As the liquid evaporates, the resulting gas tends to displace the normal airfrom the area. In closed areas, excessive amounts of CO2 gas reduce theconcentration of oxygen and can result in asphyxiation. Because CO2 gasis colorless, odorless and tasteless, it cannot be detected by the humansenses and will be breathed as if it were air. Breathing an atmosphere thatcontains less than 18% oxygen can cause dizziness and quickly result inunconsciousness and death.
Note The cloudy vapor that appears when liquid CO2 is exposed to the airis condensed moisture; not the gas itself. The issuing gas is invisible. s
Never dispose of liquid CO2 in confined areas or places where othersmay enter. Disposal of liquid CO2 should be done outdoors in a safe place. Pour theliquid slowly on gravel or bare earth where it can evaporate withoutcausing damage. Do not pour the liquid on pavement.
Model 8600 Series 12-5Thermo Scientific
Section 12Appendix A
If a person seems to become dizzy or loses consciousness while workingwith liquid nitrogen or carbon dioxide, move them to a well-ventilatedarea immediately. If breathing has stopped, apply artificial respiration. Ifbreathing is difficult, give oxygen. Call a physician. Keep warm and atrest.
If exposed to liquid or cold gas, restore tissue to normal body temperature(98.6°F) as rapidly as possible, followed by protection of the injured tissuefrom further damage and infection. Remove or loosen clothing that mayconstrict blood circulation to the frozen area. Call a physician. Rapidwarming of the affected part is best achieved by using water at 108°F.Under no circumstance should the water be over 112°F, nor should thefrozen part be rubbed either before or after rewarming. The patient shouldneither smoke nor drink alcohol.
First Aid
Model 8600 Series 13-1Thermo Scientific
13-2 Model 8600 Series Thermo Scientific
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