Thermo Scientific 8600 Series Operating instructions

Model 8600 Series
-86C Ultra Low Temperature Freezer
Operating and Maintenance Manual
7038602 Rev. 5

Thermo ScientificThermo Scientific
Preface
Model 8600 Series i
Model Capacity in Cubic Feet Voltage
8602 13 230
8603 13 120
8604 17 120
8605 17 230
8606 23 230
8607 28 230
8656 23 120
Double Door Units
8690 23 120
8691 13 230
8692 13 120
8693 17 120
8694 17 230
8695 23 230
MANUAL NUMBER 7038602
5 25693/FR-2080 7/29/09 Chg’d drier from 209016 to 209017 (refrig schematics), -205 drawing ccs
425283/IN-10127 5/27/09Updated8602-200-1-Bexplodedpartsdrawing-28cuftdoorchange ccs
3 25411/FR-2040 4/30/09 Changed drier from 209020 to 209016 (refrigeration schematics) ccs
2 25018/FR-2016 10/29/08 Removed reference to VRP tool ccs
1 24567/FR-2000,24605/ 5/22/08 Clarified chamber probe and thermocouple callouts, Important info above, ccs
FR-2000, 24417/SI-9962 updated exploded parts drawings (-203) to current production (color chg),
24191 software updated, ‘Test BUS Operation’ and Micro Board Failure Error, 8627 red cell deleted ccs
0 23831/FR-1943 6/15/07 Release 4 heat exchanger ccs
REV ECR/ECN DATE DESCRIPTION By
Important installer and user information:
A redundant temperature sensing device has been included in this ULT
freezer. This device is a type “T” thermocouple. For convenient access,
the thermocouple (Figure 1-3) terminates in an interconnect jack (Figure
1-5) behind the base front cover. (May be located differently in chests.
See Section 1.) It is strongly recommended that this thermocouple be
attached to a redundant 24 hour 7 day monitoring system with alarm
capabilities. Connecting the sensor to a monitoring and alarm system
separate from the freezer provides the utmost in product safety, should
the integral system fail. s

Thermo Scientificii Model 8600 Series Thermo Scientific
Preface
Important Read this instruction manual. Failure to read, understand and follow 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 by qualified service personnel. s
Material in this manual is for information purposes only. The contents and the product it describes are subject to
change without notice. Thermo Scientific makes no representations or warranties with respect to this manual. In
no event shall Thermo be held liable for any damages, direct or incidental, arising out of or related to the use of
this manual.
©2007 Thermo Scientific. All rights reserved.

Thermo Scientific Model 8600 Series iiiThermo Scientific
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
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 be
damaged by elevated temperatures.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipment
falling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the market
after 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & Electronic
Equipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Thermo Scientific
has contracted with one or more recycling/disposal companies in each EU Member State European
Country, and this product should be disposed of or recycled through them. Further information on
Thermo’s compliance with this directive, the recyclers in your country and information on Thermo
products will be available at www.thermo.com.
4Always use the proper protective equipment (clothing, gloves, goggles, etc.)
4Always dissipate extreme cold or heat and wear protective clothing.
4Always follow good hygiene practices.
4Each individual is responsible for his or her own safety.

Thermo Scientificiv Model 8600 Series Thermo Scientific
Preface
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Model 8600 Series vThermo Scientific
Table of Contents
Installation and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Control Panel Keys, Displays & Indicators . . . . . . . . . . . . . . . . . . . .1-3
Keypad Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Install the Freezer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Choose the Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Install the Wall Bumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Install the Shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
RS-232 Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Remote Alarm Contacts and Analog Output . . . . . . . . . . . . . . . . .1-7
Attach the Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Connect the Unit to Electrical Power . . . . . . . . . . . . . . . . . . . . . . .1-8
Freezer Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Set the Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Set the High Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Set the Low Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Access Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrate the Control Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrate the Optional Sample Probe . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
High Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Low Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
System Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
BUS Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Display Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Clear High Stage Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Set an Access Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
RS485 Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Back-Up System Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Section 1
Section 2
Section 3

vi Model 8600 Series Thermo Scientific
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Wrong Power Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
High Stage System Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Voltage Compensation Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Multiple Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Micro Board Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Communication Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Probe Failure Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean Cabinet Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean the Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Clean the Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Defrost the Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Clean the Door Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Vacuum Relief Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
Replace the Battery(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
Prepare the Unit for Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Factory Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
BUS-Back-Up System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Install Injection Assembly, Vent Stack and Solenoid . . . . . . . . . . . .6-1
Install the Temperature Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Connect the Probe/Solenoid Harness . . . . . . . . . . . . . . . . . . . . . . .6-4
BUS Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Set the Optional BUS Set Point . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Test the BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Clean the Vent Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Disconnect the Fitting Assembly & Transfer Hose . . . . . . . . . . . . .6-7
Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Install the Chart Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Change Recorder Temperature Range . . . . . . . . . . . . . . . . . . . . . . .6-8
Calibrate the Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Datalogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-9
Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-9
Five Inner Door Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Exploded Parts Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Refrigeration Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
Appendix
Table of Contents
Section 4
Section 5
Section 6
Section 8
Section 7
Section 9
Section 10

Model 8600 Series 1-1Thermo Scientific
•ControlPanel-keypad,displaysandindicators.
•BUS(OptionalBackUpSystem)panel.
• Optional temperature recorder - 7 day, one pen or datalogger.
• Documentation compartment - storage of user’s manual and other docu-
mentation.
•Remotealarmcontactsandselectableanalogoutputconnection-0-1V,
4-20mA (default), 0-5V.
• Power inlet for power cord connection.
•OptionalBUSconnectionsforprobeandsolenoid.
•RS-232(default)orRS-485interface.
•PowerSwitch(mainsdisconnect).
Section 1 Installation and Start-Up
Optional Back Up
System Controls
Temperature
Recorder (Optional)
Control Panel
Documentation
Compartment
Figure 1-1. Front View
Optional Back-up
System Connections
RS-232 or RS-485
Interface
Power Switch
(mains disconnect)
Power Inlet
Wall Bumper
(pre-tapped holes)
Remote Alarm Contacts
and Analog Output
Figure 1-2. Rear View

1-2 Model 8600 Series Thermo Scientific
Section 1
Installation and Start-Up
Figure 1-5
• Battery mounting bracket(s)
• Battery power switch (freezer and BUS)
• Freezer battery
•OptionalBUSbattery
• Freezer filter location
Sealant
(Caution: This is a critical seal.
Seal must be maintained.)
Optional - Recorder Probe/Datalogger Probe
Control RTD/Redundant Type T
Thermocouple Probe
Optional Miscellaneous Accessories Probe
Figure 1-3. Chamber Probe
Vacuum Relief
Port
Chamber Probe
Cover
Figure 1-4. Vacuum Relief and Probe Cover Location
Battery power
switch To
remove filter
Thermocouple
interconnect jack
Battery mounting
bracket
Freezer battery
and optional BUS battery
Figure 1-5. Battery(s) Location and Switch
Figures 1-3 & 1-4
• Vacuum relief
port - pressure
equalization port
• Probe cover -
houses control,
optional recorder,
datalogger or
1535 alarm
probes

Model 8600 Series 1-3Thermo Scientific
Section 1
Installation and Start-Up
Mode Select Switch - Used to select Run, Settings, Calibrate and
System Configuration Modes.
Mode Select Indicators -
Run: Run Menu
Settings: Set Points Menu
Calibrate: Calibrate Menu
Configuration: Configuration Menu
Temperature Display - Displays temperature in degrees Celsius.
Alarm Indicator - Light pulses on/off during a cabinet 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 the operator through the choices
of the selected mode.
Up and Down Arrows - Increases or decreases values, toggles between
choices.
Enter - Stores the value into computer memory.
Control Panel Keys,
Displays & Indicators
SYSTEM OK
Mode
Temp Display Visual Alarm
Indicator
Silence
Low Battery
Indicator
Hot Condenser
Indicator
Message
Center
Scroll for Parameters
Arrows Up and Down
Arrows
Enter
Figure 1-6. Control Panel

Model 8600 Series freezer has four basic modes which allow freezer setup:
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 parameters
of SETTINGS, CALIBRATE and CONFIGURATION Modes. The
right arrow goes to the next parameter, the left arrow returns to the pre-
vious parameter.
Up Arrow: Increases or toggles the parameter value that has been selected
in 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.
1-4 Model 8600 Series Thermo Scientific
Section 1
Installation and Start-Up
Keypad Operation
Run Settings Calibrate Configuration
Default Mode
System 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

Install the Freezer
Message Center: Displays the system status (Mode) at all times. Displays
SYSTEM OK during normal operation, or alarm messages if the system
detects an alarm condition. See Section 4 - Alarms.
Caution If tipped more than 45°, allow the unit to set upright for 24 hours
before start up. s
To remove the freezer from the pallet, use the 7/16" wrench to remove all
the bolts securing the shipping bracket to the pallet.
Remove the shipping bracket. Remove the ramp boards from the pallet
and place the slotted end over the ramp brackets on the pallet. The
support blocks on the ramps will be facing down. Before moving the
freezer, make sure the casters are unlocked and moving freely. Align the
caster with the ramp boards. Use adequate personnel to roll the freezer off
the pallet.
The freezer can be easily pushed to the desired approved location,
described in the following section. If necessary, the doors and lower front
panel may be opened to move the unit through tight openings. When the
freezer is in position, 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 ambient
temperature between 18°C and 32°C. Provide ample room to reach the
mains disconnect switch (power switch) located on the rear of the freezer.
Caution For proper ventilation and airflow, a minimum clearance of 5” at
the rear and top and a clearance of 8” on the side of the freezer is required.
Allow adequate space in the front of the freezer for door opening. s
Model 8600 Series 1-5Thermo Scientific
Section 1
Installation and Start-Up
Displays
Choose the Location

Install the Shelves
The parts bag, located inside the cabinet, contains the following parts.
Install the bolts into the pre-tapped holes on the back of the compressor
section. Install a neoprene cap on each bolt. Refer to Figure 1-2 for the
locations of the pre-tapped holes.
Install the shelf clips into the shelf pilasters (front and back) at the desired
shelf level. Install the shelves in the cabinet onto the clips.
Note On units having the optional 5 inner door option, refer to the
instructions accompanying the inner door kit. s
The Model 8600 Series freezer has a data communications interface. The
factory default setting is RS-232.
The wiring identification for the interface is
shown in Figure 1-7. One nine pin, sub "D"
style connector is located on the back of the
freezer. See Figure 1-2 for the location of the
connector on the freezer.
The freezer transmits temperature information every 60 minutes. A
standard DB9 serial extension cable can be used to connect the freezer to
serial device. Some serial devices may require a null modem adapter.
Data format:
Baud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1200
Data bits . . . . . .8 (7 bit ASCII with leading zero)
Start bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Stop bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Parity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .none
1-6 Model 8600 Series Thermo Scientific
Section 1
Installation and Start-Up
Qty Stock # Description Purpose
2510016 1/4-20 x 5-1/2” Bolt Wall Bumper
2380520 Neoprene Cap Cap Protector
Install the Wall Bumpers
RS-232 Communications
Figure 1-7. Wiring

Remote Alarm Contacts
and Analog Output
The data transfer sequence is transmitted in the following format. X refers
to 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 when
an alarm condition exists along with the temperature. If no alarm
condition exists, spaces will be sent. A total of 20 characters will be sent.
SP - Space LF - Line feed
CR - Carriage return EOT - End of text (4)
NUL - Null character (00)
Note The RS-232 is not compatible with Model 1535 Monitor/Alarm
System. s
Model 8600 Series freezer has remote alarm contacts and analog output.
See Figure 1-2 for the location of the remote alarm contacts. The remote
alarm connector is shipped in the parts bag provided with the manual. It
must be installed if connecting the freezer to an alarm system. After
installing the wiring from the alarm system to the connector, install the
connector to the freezer microboard and secure with the two screws
provided. The remote alarm provides a NO (normally open) output, a NC
(normally closed) output and COM (common). The contacts will trip on a
power outage, high temperature alarm or low
temperature alarm. Figure 1-8 shows the remote
contacts in alarm state.
The analog output function allows the freezer to
output signals representing the temperature of the
freezer cabinet. The factory default setting is 4-20
mA. Refer to Figure 1-9 for output specifications.
Model 8600 Series 1-7Thermo Scientific
Section 1
Installation and Start-Up
Figure 1-8. Remote
Contacts in Alarm
Figure 1-9. Output Specifications
IMPORTANT USER INFORMATION
IMPORTANT USER INFORMATION
4-20 mA 0-1V 0-5V
Temperature -100 to +50°C -100 to +50°C -100 to +50°C
RS-232 Communications
(continued)

Connect the Unit to
Electrical Power
Insert the power cord into the power
inlet module. Place the retaining
bracket (P/N 195763) over the
connector. Tighten retaining screws
to secure.
Caution See the serial tag on the side of the unit for electrical specifications
or refer to the electrical schematics in this manual. s
The freezer should be operated on a dedicated grounded service. Check the
voltage rating on the serial tag of the unit and compare it with the outlet
voltage. Then, with the power switch turned off, plug the line cord into
the wall outlet.
First, turn on the freezer power switch. Then open the lower front door by
grasping the bottom left corner. Locate the battery switch (Figure 1-5) and
turn it to Standby mode ( ). During initial freezer start-up, the system
battery may require charging and the Low Battery indicator may
illuminate.
Caution Ensure the battery switch is turned to Standby mode ( ). The
rechargeable batteries require 36 hours to charge at initial start-up. A “Low
Battery” alarm may occur until the batteries are fully charged. Should a
power failure occur during the initial start-up period, the electronics will
have limited operation. s
With the freezer properly installed and
connected to power, system set points can
be entered. The following set points can
be entered in Settings mode: Control
temperature, high temperature alarm set
point, low temperature alarm set point,
and (optional) BUS set point. Default
settings are shown in Table 1.
Caution If the set point is changed and the low temperature and high
temperature alarms are set 10° from the set point, the alarm set points will
adjust automatically to maintain a distance of at least 10° from set point. s
1-8 Model 8600 Series Thermo Scientific
Section 1
Installation and Start-Up
Figure 1-10. Secure Power Cord
Attach the Power Cord
Freezer Start-Up
Control Set Point -80°C
High Temperature Alarm -70°C
Low temperature alarm -90°C
Optional BUS Set Point -60°C
Table 1-1. Default Settings

All Model 8600 Series freezers have an operating temperature range of
-50°C to -86°C, depending on ambient temperature. The freezer is shipped
from the factory with a temperature set point of -80°C. To change the
operating temperature set point:
1. Press the Mode key until the Settings indicator lights.
2. Press the right arrow until “SET PT = -XX” is displayed in the message
center.
3. Press the up/down arrow key until the desired temperature set point is
displayed.
4. Press Enter to save the set point.
5. Press the Mode key until the Run indicator lights for Run mode or
press the right/left arrow keys to go to next/previous parameter.
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
The high temperature alarm will activate an audible/visual warning when
the freezer chamber temperature has reached or exceeded the high
temperature alarm set point. To set the high temperature alarm set point:
1. Press the Mode key until the Set indicator lights.
2. Press the right arrow until “HI ALM = -XX” is displayed in the
message center.
3. Press the up or down arrow key until the desired high temperature
alarm 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 or
left arrow to go to the next or previous parameter.
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
Note The high alarm set point must be set at least 5°C from the control
set point. s
Note At initial start-up, the high temperature alarm is disabled until the
cabinet reaches set point or 12 hours elapse. s
Model 8600 Series 1-9Thermo Scientific
Section 1
Installation and Start-Up
Set the Operating
Temperature
Set the High Temperature
Alarm

Run Mode
Access Code
The low temperature alarm will activate an audible/visual warning when
the freezer chamber temperature has reached or decreased below the low
temperature 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 the
message center.
3. Press the up or down arrow key until the desired low temperature
alarm 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 or
left arrow to go to the next or previous parameter.
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
Note The low alarm set point must be set at least 5°C from the control set
point. s
An access code of 000 is required to access the Settings, Calibrate or
Configuration modes. If the access code is not at the default 000, a code
must be entered to leave RUN mode. See Section 3 to modify the access
code.
Run mode is the default mode for the freezer. Run mode will display the
cabinet temperature on the temperature display and ‘SYSTEM OK’ on the
message center under normal operating conditions. In addition, Run mode
allows display of the following information:
LINE VOLTAGE
COMPENSATED VOLTAGE
HSHX TEMPERATURE (heat exchanger temperature)
This information is scrolled individually by pressing the right arrow key. In
each case, the message center returns to SYSTEM OK in 10 seconds if no
keys are pressed.
1-10 Model 8600 Series Thermo Scientific
Section 1
Installation and Start-Up
Set the Low Temperature
Alarm

Model 8600 Series 1-11Thermo Scientific
Section 1
Installation and Start-Up
Press MODE
to light SETTINGS
indicator
Mode
Mode
SET PT = -XX
Numbers increase
Press MODE to move
to CALIBRATE
mode
Numbers decrease
Press Enter
to save setting
Scroll for Parameters
Scroll for Parameters
Mode HI ALM = -XX
Scroll for Parameters
Press to return
to previous parameter
Press to return
to previous parameter
Press to return
to previous parameter
Low Alarm
Set Point
High Alarm
Set Point
Control
Set Point
To Se t:
Settings Mode
Numbers increase
Numbers decrease
Press Enter
to save setting
Numbers increase
Numbers decrease
Press Enter
to save setting
Mode
Press to return
to previous parameter
Optional
Back 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 Calibrate
After the freezer has stabilized, the control or sample probe may require
calibration. Calibration frequency is dependent on use, ambient conditions
and accuracy required. A good laboratory practice would require at least an
annual calibration check. On new installations, all parameters should be
checked after the stabilization period.
Caution Before making any calibration or adjustments to the unit, it is
imperative that all reference instruments be properly calibrated. s
Plug a type T thermocouple reader into the receptacle located inside the
lower door (see Figure 1-5). Compare the control temperature set point to
the temperature of the measuring device. See Chart 2-1 at the end of this
section 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 message
center.
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 to
next/previous parameter.
Calibrate the Control
Probe