Thermo Scientific 996 Operating instructions

Model 900 Series
-86C Ultra Low Temperature Freezer
Operating and Maintenance Manual 7030902 Rev. 5

Thermo ScientificThermo Scientific
Preface
Model 900 Series i
Model Capacity
(cubic feet) Voltage
902 13 230
903 13 120
904 17 120
905 17 230
906 23 230
907 28 230
956 23 120
Double Door Units
990 23 120
991 13 230
992 13 120
993 17 120
994 17 230
995 23 230
996 13 230
997 17 230
998 23 230
Part
Number Description Quantity
34040 Key Ring 1 (2 for double
door units)
122005 Key 2 (4 for double
door units)
380520 Neoprene Cap 2
510016 1/4-20 x 5-1/2” Bolt 2
195763 Retaining Clip 1
370563 Remote Alarm
Connector 1
Packing ListModels Covered
MANUAL NUMBER 7030902
5 25283/IN-10127 5/28/09 Updated 8602-200-1-B exploded parts drawing - 28 cu ft door change ccs
4 25411/FR-2049 4/30/09 Changed drier from 209020 to 209016 (refrigeration schematics) ccs
3 25018/FR-2016 10/29/08 Removed reference to VRP tool ccs
2 FR-2004 8/27/08 Added 996, 997, and 998 models ccs
-- -- 7/8/08 Removed typographical errors in Specifications (lids, sub-lids instead of door insulation) ccs
1 24567/FR-2000,24605/ 4/24/08 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 - added ‘Test BUS Operation’ and Micro Board Failure Error
0 23831/FR-1943 6/18/07 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 thermocou-
ple (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 900 Series Thermo Scientific
PrefacePreface
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.
Contains Parts and Assemblies
Susceptible to Damage by
Electrostatic Discharge (ESD)
CAUTION

Thermo Scientific Model 900 Series iiiThermo Scientific
Preface
Thermo ScientificThermo Scientific
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
Extreme temperature hazards, hot or cold. Use special handling equipment or wear special, protective
clothing.
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 900 Series Thermo Scientific
Preface
Do You Need Information or Assistance on
Thermo Scientific Products?
If you do, please contact us 8:00 a.m. to 6:00 p.m. (Eastern Time) at:
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Marietta, OH 45750
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applications. If you are experiencing technical problems, working together, we will help you
locate the problem and, chances are, correct it yourself...over the telephone without a service
call.
When more extensive service is necessary, we will assist you with direct factory trained
technicians or a qualified service organization for on-the-spot repair. If your service need is
covered by the warranty, we will arrange for the unit to be repaired at our expense and to your
satisfaction.
Regardless of your needs, our professional telephone technicians are available to assist you
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International customers, please contact your local Thermo Scientific distributor.
Sales Support
Service Support
[e-mail]

Model 900 Series vThermo Scientific
Table of Contents
Installation and Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 1
Freezer Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 1
Control Panel Keys, Displays, Indicators . . . . . . . . . . . . . . . . . . . .1 - 4
Operation of the Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 5
Install Freezer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 5
Choose Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 5
Install Wall Bumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 6
Install Shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 6
Remote Alarm Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 6
Attach Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 7
Connect Unit to Electrical Power . . . . . . . . . . . . . . . . . . . . . . . . .1 - 7
Freezer Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 8
Set Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 8
Set High Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 9
Set Low Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 9
Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 10
Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 1
Calibrate Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 1
Calibrate Control Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 1
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 1
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 1
Wrong Power Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 1
High Stage System Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 2
Probe Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 2
Voltage Compensation Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 2
Micro Board Failure (E07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 2
Loss of Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 2
Section 1
Section 2
Section 3

vi Model 900 Series Thermo Scientific
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
Clean Cabinet Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
Clean Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
Clean Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
Clean Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 2
Defrost Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 2
Clean Door Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 3
Vacuum Relief Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 3
Replace Battery(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 5
Prepare Unit for Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 5
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 6
Factory Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 1
BUS (Back Up System) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 1
Install Vent Stack, Solenoid and Injection Assembly . . . . . . . . . . .5 - 1
Install Temperature Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 3
Connect Probe/Solenoid Harness . . . . . . . . . . . . . . . . . . . . . . . . .5 - 4
BUS Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 5
Configure Optional BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 6
Set Optional BUS Set Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 6
Test BUS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 7
Clean Vent Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 7
Disconnect Fitting Assembly, Transfer Hose . . . . . . . . . . . . . . . . .5 - 7
Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 7
Install Chart Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 8
Recorder Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 8
Datalogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 9
Water-Cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 9
Five Inner Door Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 - 1
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 - 1
Refrigeration Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 1
Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 - 1
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 - 1
Handling Liquid Nitrogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A - 1
Handling Liquid CO2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B - 1
First Aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C - 1
Table of Contents
Section 4
Section 5
Section 6
Section 8
Section 7
Section 9
Section 10
Appendix

Model 900 Series 1-1Thermo Scientific
Section 1 Installation and Start-up
• Control panel - keypad, displays and indicators
• BUS (Optional Back Up System) control panel
• Optional temperature recorder or datalogger
Optional Back Up
System Controls
Temperature
Recorder
(Optional)
Control Panel
Figure 1-1. Freezer Front View Components

1-2 Model 900 Series Thermo Scientific
Section 1
Installation and Start-Up
Thermo Scientific
Section 1
Installation and Start-Up
Optional Back-up
System Connections
Power Switch
(mains
disconnect)
Power Inlet
Remote Alarm
Contacts
Wall Bumper
(pre-tapped holes)
Figure 1-2. Freezer Rear View Components
Shelf
Bracket
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(s)
• Remote alarm contacts
• Power inlet for power cord connection
• Optional BUS connections for probe and solenoid
• Power switch (mains disconnect)

Model 900 Series 1-3Thermo Scientific
Section 1
Installation and Start-Up
• Vacuum relief port - pressure equalization port
• Probe cover - houses control, optional recorder, datalogger, or 1535
alarm probes
• Battery mounting bracket(s)
• Battery power switch (freezer and BUS)
• Freezer battery
• Optional BUS battery
• Freezer filter location
Figure 1-4. Vacuum Relief and Probe Cover Location
O
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