Thermo Scientific Revco ExF User manual

Thermo Scientific
Revco®ExF -86C ULT Upright Freezer
Operating Manual 7048920 Rev. 5
Visit us online to register your warranty
www.thermoscientific.com/labwarranty

Thermo Scientific
Preface
Revco ExF i
Part
Number Description Quantity
122005 Key 2 (4 DD)
380520 Neoprene Cap 2
510016 ¼-20 x 5½” Bolt 2
195763 Retaining Clip 1
370563 Remote Alarm
Connector 1
Packing List
Models Covered
MANUAL NUMBER 7048920
5 31726 2/24/15 Added RS-232 information ccs
4 31457/FR-2712 10/9/14 Added factory installed water cooled condenser option information ccs
3 30873/FR-2674 7/22/14 RoHS overlay part number - expl dwgs, pgs 7-4, 7-5, 7-8, 7-9 ccs
2 31013/FR-2673 6/18/14 RoHS compliant washer on oil separator (expl base dwg, refrig schematics) ccs
1 30948 4/25/14 Updated 902 elec schematic to show correct compressors ccs
0 30814/FR-2603 3/24/14 Release 10 - hinges and mullion (pg 7-6, 7-7) ccs
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
* DD = Double Doors
Catalog
Number Model Capacity (cu ft)
Voltage/
Hz
ExF24086V 8920 13 230/50
ExF24086D 8921 13 230/60
ExF24086A 8922 13 120/60
ExF32086A 8923 17 120/60
ExF32086D 8924 17 230/60
ExF32086V 8925 17 230/50
ExF40086V 8926 23 230/50
ExF40086D 8927 23 230/60
ExF40086A 8928 23 120/60
ExF60086D 8929 28 230/60
ExF60086V 8930 28 230/50
ExF21686D 968 DD 13 230/60
ExF28886V 969 DD 17 230/60
ExF36086V 970 DD 23 230/60
Catalog
Number Model Capacity (cu ft)
Voltage/
Hz
ExF24086SSV 6420 13 230/50
ExF24086SSD 6421 13 230/60
ExF24086SSA 6422 13 120/60
ExF32086SSA 6423 17 120/60
ExF32086SSD 6424 17 230/60
ExF32086SSV 6425 17 230/50
ExF40086SSV 6426 23 230/50
ExF40086SSD 6427 23 230/60
ExF40086SSA 6428 23 120/60
ExF60086SSD 6429 28 230/60
ExF60086SSV 6430 28 230/50
ExF21686SSD 5968DD 13 230/60
ExF28886SSD 5969DD 17 230/60
ExF36086SSD 5970DD 23 230/60

Thermo Scientificii Revco ExF
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 Fisher 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.
The -86C Freezers (see page i for specific list of models) described in this manual are high performance units
which can be used for research and in situations that directly support medical applications. When these products
are used to support a medical application, it is an accessory to a medical device and is therefore considered as a
medical device in its own right by the regulatory body (e.g. FDA).
This product is intended for use:
• As cold storage in research use.
• As a medical device for diagnostic use (storage of samples not intended to be re-introduced to human body).
Registration: This medical application is considered a Class I medical device by the FDA. This product is
classified as product code – JRM, regulation number 862.2050 and is considered a Class 1 device, 510(K)
exempt.
©2014 Thermo Fisher Scientific. All rights reserved.
Contains Parts and Assemblies
Susceptible to Damage by
Electrostatic Discharge (ESD)
CAUTION

Thermo Scientific Revco ExF iii
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.
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 Fisher
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 Scientific products will be available at www.thermofisher.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 Revco ExF
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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Our staff can provide information on pricing and give you quotations. We can
take your order and provide delivery information on major equipment items or make
arrangements to have your local sales representative contact you. Our products are listed on the
Internet and we can be contacted through our Internet home page.
Our staff can supply technical information about proper setup, operation or
troubleshooting of your equipment. We can fill your needs for spare or replacement parts or
provide you with on-site service. We can also provide you with a quotation on our Extended
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Whatever Thermo Scientific products you need or use, we will be happy to discuss your
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
Monday through Friday from 8:00 a.m. to 6:00 p.m. Eastern Time. Please contact us by
telephone or fax. If you wish to write, our mailing address is:
International customers, please contact your local Thermo Scientific distributor.
Sales Support
Service Support
www.unitylabservices.com

Revco ExF vThermo Scientific
Table of Contents
Installation and Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .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
RS-232 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Remote Alarm Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Attach Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Connect Unit to Electrical Power . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Freezer Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Set Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Set High Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Set Low Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrate Control Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Temperature Stabilization Periods . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
High Stage System Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Probe Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Error Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Clean Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Clean Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Clean Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Defrost Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Prepare the Unit for Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Long Term Storage with Water-cooled Condenser . . . . . . . . . . . . .4-3
Clean Door Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Vacuum Relief Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Check Battery(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Replace Battery(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Section 1
Section 2
Section 3
Section 4

vi Revco ExF Thermo Scientific
Factory Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Back Up System (BUS) - P/N 1950533, 1950535 . . . . . . . . . . . . . .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 (Back-Up System) . . . . . . . . . . . . . . . . . .5-6
Set Optional BUS Set Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Test BUS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Clean Vent Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Disconnect Fitting Asm. and Transfer Hose . . . . . . . . . . . . . . . . . . .5-7
Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Installing the Chart Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
Change Recorder Temperature Range . . . . . . . . . . . . . . . . . . . . . . .5-8
Recorder Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
Water Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-11
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Double Door Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
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 5
Section 6
Section 8
Section 7
Section 9
Section 10
Appendix

Revco ExF 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 Revco ExF 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)

Revco ExF 1-3Thermo Scientific
Section 1
Installation and Start-Up
• Vacuum relief port - pressure equalization port
• Probe cover - houses control, optional recorder, datalogger, or
miscellaneous accessory probes
• Battery mounting bracket(s)
• Battery power switch (freezer and BUS)
• Freezer battery
• Optional BUS battery
• Freezer filter location
Vacuum
Relief Port
Chamber
Probe Cover
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

• Mode Select Switch - Used to select Run, Set Temperature, Set High
Alarm, Set Low Alarm, Calibrate, Backup.
• Temperature Display - Displays temperature in degrees Celsius.
• Scroll for Parameters Arrows - moves the operator through the choices
of the selected mode.
• Alarm Indicator - Light pulses on/off during an alarm condition of the
cabinet.
• Silence - Silences the audible alarm. See Section 4 for alarm ringback
times.
• Alarm Panel - indicates the current alarm condition.
• Up and Down Arrows - Increases or decreases values, toggles between
choices.
• Enter - Stores the value into memory
1-4 Revco ExF Thermo Scientific
Section 1
Installation and Start-Up
Figure 1-6. Control Panel
Control Panel Keys,
Displays, Indicators
Mode Key
Temperature Display Alarm Indicator
Silence Key
Alarm Panel
Up and Down
Arrows Enter Key

Revco ExF freezer has five basic modes which allow freezer setup and
operation. Press the Mode key to scroll through the mode selections.
Up Arrow: Increases or toggles the parameter value.
Enter: Must press Enter key to save to memory all
changed values.
Down Arrow: Decreases or toggles the parameter value.
Silence Key: Press to silence the audible alarm. See
Section 4 for alarm ringback times.
Note If tipped more than 45°, allow the unit to sit upright for 24 hours
before start up. s
To remove the freezer from the pallet, use a 1/2" 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 below. 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.
Note The freezer must not be moved with the product load inside. s
Note 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
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.
Revco ExF 1-5Thermo Scientific
Section 1
Installation and Start-Up
Install Freezer
Choose Location
Operation of the
Keypad

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 Maximum shelf load is 100 lbs (45.4 kg) per shelf. s
Note On units having the optional 5 inner door option, refer to the
instructions accompanying the inner door kit. s
The Model 8800 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 a
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
The data transfer sequence is transmitted in the following format. X refers
to numerical temperature data.
(NUL) (-) XXX (SP) C (SP) (Error Message) (SP) (LF) (CR) (EOT) (SP)
1-6 Revco ExF Thermo Scientific
Section 1
Installation and Start-Up
Install Shelves
Quantity Stock # Description Purpose
2 510016 1/4-20 x 5-1/2” Bolt Wall Bumper
2 380520 Neoprene Cap Cap Protector
Table 1-1. Parts bag
Install Wall Bumpers
RS-232 Communication
Figure 1-7. RS-232 Interface

In the event of a CNTRLFAIL, Er07, or the control probe is out of range
error, the numerical temperature data (XXX) in the transmission would be
replaced by T_ERR.
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)
If an alarm condition does exist, “Error Message” in the protocol will be
replaced by the following:
UNDERTEMP (temperature above the low alarm setpoint)
OVERTEMP (temperature below the high alarm setpoint)
PWRFAIL (AC power failure)
CNTRLFAIL (Control probe failure)
Er07 (micro failure)
HSHX FAIL (Heat exchanger failure)
HOT COND (Hot condenser)
See Figure 1-2 for the location of the remote alarm contacts. The remote
alarm connector is located 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 and high temperature or low temperature alarms. They will
also trip on high stage, control probe or microboard failures.
Figure 1-8 shows the remote contacts
in alarm state.
Revco ExF 1-7Thermo Scientific
Section 1
Installation and Start-Up
RS-232 Communication
(continued)
Remote Alarm Contacts
Figure 1-8. Remote Alarm Contacts
IMPORTANT USER INFORMATION
CAUTION! Stored product should be protected
by a redundant 24 hour/day monitoring system
with alarm capability. An interconnect jack and
thermocouple are installed for centralized
monitoring, should on-board system fail.

Insert the power cord into the power
inlet module. Place the retaining
bracket (P/N 195763) over the
connector. Tighten retaining screws
to secure.
See the serial tag on the side of the unit for electrical specifications or refer
to the electrical schematics in this manual. s
Caution If the factory installed option water cooled condenser is present,
do not turn the freezer on without water connected and flowing. Damage
to the refrigeration system could occur within 5 minutes if water is not
connected and flowing on unit start-up. Refer to Section 5. 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.
Note 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 the table following.
1-8 Revco ExF Thermo Scientific
Section 1
Installation and Start-Up
Attach Power Cord
Connect Unit to Electrical
Power
Figure 1-9. Power Cord Connection
Freezer Start-Up

Note 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
be adjusted automatically to maintain a distance of at least 10° from set
point. s
Caution If the factory installed option water cooled condenser is present,
do not turn the freezer on without water connected and flowing. Damage
to the refrigeration system could occur within 5 minutes if water is not
connected and flowing on unit start-up. Refer to Section 5. s
Revco ExF 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 Set Temperature indicator lights.
2. Press the up/down arrow key until the desired temperature set point is
displayed.
3. Press Enter to save the set point.
4. Press the Mode key until the Run indicator lights for Run mode
If no keys are pressed, the freezer will automatically return to RUN mode
after 5 minutes.
Note If the set point is changed and the low temp and high temp alarms
are set 10° from the set point, the alarm set points will be adjusted
automatically to maintain a distance of at least 10° from set point. s
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.
Revco ExF 1-9Thermo Scientific
Section 1
Installation and Start-Up
Set High Temperature
Alarm
Freezer Start-Up
(continued) Default Settings Temperature
Control Set Point -80°C
High Temperature Alarm -70°C
Low temperature alarm -90°C
Optional BUS Set Point -60°C
Table 1-2. Default Settings
Set Operating
Temperature

To set the high temperature alarm set point:
1. Press the Mode key until the Set High Alarm indicator lights.
2. Press the up or down arrow key until the desired high temperature alarm
set point is displayed.
3. Press Enter to save the setting.
4. Press the Mode key until the Run indicator lights for Run mode
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
Note High alarm set point must be set at least 5°C from 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
The low temperature alarm will activate an audible/visual warning when the
freezer chamber temperature has reached or decrease below the low
temperature alarm set point.
To set the low temperature alarm set point:
1. Press the Mode key until the Set Low Alarm indicator lights.
2. Press the up or down arrow key until the desired low temperature alarm
set point is displayed.
3. Press Enter to save the setting.
4. Press the Mode key until the Run indicator lights for Run mode
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
Note Low alarm set point must be set at least 5°C from control set point. s
Run mode is the default mode for the freezer. This mode displays the
cabinet temperature on the temperature display under normal operating
conditions. In addition, the Run mode allows display of the high stage heat
exchange temperature.
This information scrolls by pressing the up or down arrow keys. The display
returns to the operating temperature in 10 seconds if no keys are pressed.
1-10 Revco ExF Thermo Scientific
Section 1
Installation and Start-Up
Set High Temperature
Alarm (continued)
=
Set Low Temperature
Alarm
Run Mode

Revco ExF 2-1Thermo Scientific
Section 2 Calibrate
Once the freezer has stabilized, the control probe may need to be
calibrated. 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.
1. Press the Mode key until the Calibrate indicator lights.
2. Press up/down arrow to match the display to calibrated instrument.
3. Press Enter to store calibration.
4. Press the Mode key to return to Run mode.
Startup - Allow 12 hours for the temperature in the cabinet to stabilize
before proceeding.
Already Operating - Allow at least 2 hours after the display reaches set
point for temperature to stabilize before proceeding.
During calibration, the temperature display will not be available. s
If no keys are pressed for approximately five minutes while in calibration
mode, the system will reset to Run mode.
Calibrate Control
Probe
Temperature Stabilization
Periods

Revco ExF 3-1Thermo Scientific
Section 3 Alarms
The Revco ExF alarms are displayed on the freezer control panel. When
an alarm is active, the indicator next to the alarm description will light and
an audible alarm will sound. Press the Silence key to disable the audible
alarm for the ringback period. The visual alarm will continue until the
freezer returns to a normal condition. The alarms are momentary alarms
only. When an alarm condition occurs and then returns to normal, the
freezer automatically clears the alarm condition.
All alarm delays and ringback times are ±30 seconds.
* The automatic battery test runs immediately on power-up, then every 8 hours thereafter.
Description Delay Ringback Relay
Power Failure 1 min. 15 min. Yes
High Temperature Alarm 1 min. 15 min. Yes
Low Temperature Alarm 1 min. 15 min. Yes
Probe Failure see 3.2 1 min. 15 min. No
Door Open 1 min. 15 min. No
Wrong Power 0 min. none Yes
Low Battery* 1 min. 8 hours No
Low BUS Battery (optional) 1 min. 15 min. No
Hot Condenser 1 min. none No
High Stage Failure 0 min. 15 min. Yes
Micro Board Failure 0 min. 15 min. Yes
Table 3-1. Alarm Indicators