Full Text Searchable PDF User Manual
Installation and Operation Manual
Thermo Scientific Revco
®
Ultima II
Cryogenic Storage Freezers
©
2007 Thermo Fisher Scientific. All rights reserved.
“Suva
®
” is a registered trademark of DuPont.
“Mylar
®
” is a registered trademark of DuPont.
“Armaflex
®
” is a registered trademark of Armacell International GmBH.
All other trademarks are the property of Thermo Fisher Scientific Inc. and its subsidiaries.
2007 Thermo Fisher Scientific. All rights reserved.
“Suva
®
” is a registered trademark of DuPont.
All other trademarks are the property of Thermo Fisher Scientific Inc. and
its subsidiaries.
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
i
Table of Contents
1 About Cryogenic Models
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Safety Precautions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 General Recommendations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3.1 Initial Loading
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
4 Pre-Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
4.1 Unpacking
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
5 Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
5.1 Location
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
5.2 Wiring
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
5.3 Leveling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
6 Operation (Revco Ultima II Freezers)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
6.1 Control Panel Features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
6.2 Start Up
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.2.1
Turning the Power On
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.2.2
Setting the Cabinet Temperature
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.2.3
Setting the Alarms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.2.4
Alarm Reset & Status Lights
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.2.5
Alarm Test
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.3 Backup System (Optional)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6.3.1
LN
2
Precautions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6.3.2
Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6.3.3
Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6.3.4
System Status Lights
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
7 Maintenance and Troubleshooting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.1 Condenser Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.1.1
Cleaning the Condenser
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.1.2
Cleaning the Condenser Filter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.2 Gasket Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.3 Defrost Procedures
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.4 Alarm Battery Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.5 Frame Heater Switch
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.6 Troubleshooting Procedures
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
ii
8 Chart Recorders
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.1 Set Up and Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.2 Power Supply
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.3 Changing Chart Paper
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.4 Calibration Adjustment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
1
1 About Cryogenic Models
The freezers described in this manual are
cryogenic
models.
These models are designed for optimum performance at -140ºC
or -150ºC, and it is strongly recommended that you use these
models at these operating temperatures.
Be sure to read the maintenance instructions in Section 7.
2 Safety Precautions
In this manual and on labels attached to this product, the words
WARNING and CAUTION mean the following:
•
WARNING: a potentially hazardous situation which, if not
avoided, could result in serious injury or death.
•
CAUTION: a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury or damage to
the equipment.
Before installing, using or maintaining this product, please be sure
to read this manual and product warning labels carefully. Failure to
follow these instructions may cause this product to malfunction,
which could result in injury or damage.
Below are important safety precautions that apply to this product:
•
Use this product only in the way described in the product
literature and in this manual. Before using it, verify that this
product is suitable for its intended use.
•
Do not modify system components, especially the controller.
Use OEM exact replacement equipment or parts. Before use,
confirm that the product has not been altered in any way.
•
Your unit must be properly grounded in conformity with
national and local electrical codes. Never connect the unit to
overloaded power sources.
•
Disconnect the unit from all power sources before cleaning,
troubleshooting, or performing other maintenance on the
product or its controls.
3 General Recommendations
The refrigeration system is designed to maintain cryogenic
temperatures with safety
only
when the freezer is used for
storage. These models may be used in an ambient environment
up to +25ºC (77ºF).
WARNING!
This unit is not a “rapid-freeze” device.
Freezing large quantities of liquid, or high-water
content items, will temporarily increase the chamber
temperature and will cause the compressors to
operate for a prolonged time period.
Avoid opening the door for extended time periods since chamber
temperature air will escape rapidly. Room air, which is higher in
humidity, replacing chamber air may cause frost to develop in the
chamber more rapidly.
3.1 Initial Loading
After reading and completing the Safety Considerations,
Pre-Installation, Installation, and Operation sections of this
manual, turn the Key Switch to the POWER ON position and
adjust the temperature setpoint if necessary.
The setpoint should be no warmer than -50ºC.
Allow the freezer
to operate at the desired temperature for a minimum of 12
hours before loading.
CAUTION!
IFailure to follow these procedures or
overloading the unit may cause undue stress on the
compressors or jeopardize user product safety.
4 Pre-Installation
4.1 Unpacking
At delivery, examine the exterior for physical damage while the
carrier’s representative is present. If exterior damage is
present, carefully unpack and inspect the unit and all
accessories for damage.
If there is no exterior damage, unpack and inspect the
equipment within five days of delivery. If you find any damage,
keep the packing materials and immediately report the damage
to the carrier.
Do not return goods without written
authorization
. When submitting a claim for shipping damage,
request that the carrier inspect the shipping container and
equipment.
CAUTION!
Do not discard the sublids from
chest-style units.
The sublids are necessary to
maintain correct temperature, moisture control, and
economy of operation.
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
2
5 Installation
Do not exceed the electrical and temperature ratings printed on
the dataplate located on the lower left side of the unit.
CAUTION!
Improper operation of the equipment
could result in dangerous conditions. To preclude
hazard and minimize risk, follow all instructions and
operate within the design limits noted on the dataplate.
5.1 Location
Install the unit in a level, well-ventilated area free from vibration,
with a minimum of six inches of space on the sides and 12 inches
behind the rear. Refer to Section 5.3 for further instructions on
leveling cabinets. Allow enough clearance so that the lid can
swing open at least 90 degrees.
Do not position the equipment in direct sunlight or near heating
diffusers, radiators, or other sources of heat. The ambient
temperature range at the location must be 59 to 77ºF
(15 to 25ºC).
CAUTION!
To allow for proper air flow, a minimum
of 12 inches of clearance space is required behind the
freezer.
CAUTION!
FLAMMABLE REFRIGERANT!
Cryogenic models with voltage M, R, V and W use
small quantities of the refrigerant R600a, which can
form a combustible mixture when combined with
oxygen. In order to conform with safety regulations, it
is important to locate your freezer in a large enough
space to minimize danger of combustion even in
worst-case conditions (no ventilation, no air exchange,
a steady refrigerant leak). Under these conditions the
minimum free volume requirements would be at least
86 m
3
or 3006 ft
3
.
5.2 Wiring
CAUTION!
Connect the equipment to the correct
power source. Incorrect voltage can result in severe
damage to the equipment.
CAUTION!
For personal safety and trouble-free
operation, this unit must be properly grounded before
it is used. Failure to ground the equipment may cause
personal injury or damage to the equipment. Always
conform to the National Electrical Code and local
codes. Do not connect the unit to overloaded power
lines.
Your freezer is equipped with the plug style shown in Figure 1,
unless it is a 50Hz or 3-phase model. The standard NEMA plug
meets UL requirements.
Figure 1. Plug Style for 60Hz Single-phase Models
Always connect the freezer to a dedicated (separate) circuit. Each
freezer is equipped with a service cord and plug designed to
connect it to a power outlet which delivers the correct voltage.
Supply voltage must be within +10%, -5% of the freezer rated
voltage.
3-phase or 50Hz models require hard wiring to a disconnect
panel.
Note:
RevcoUltima freezers are equipped with a standard
built-in Voltage Safeguard circuit to detect and adjust
low line voltage.
CAUTION!
Never cut the grounding prong from the
service cord plug. If the prong is removed, the
warranty is invalidated.
5.3 Leveling
The unit must be level both front to back and side to side.
To level chest models, leave the casters in place and shim the low
wheel(s) with strips of sheet metal cut at least 1/2 in. wider than
the caster.
30A-250V
NEMA 6-30P
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
3
6 Operation
6.1 Control Panel Features
Figure 2. Revco Ultima II Series Control Panel with
Optional Backup System
Before the initial start up, take some time to become familiar
with the controls on your freezer. Figure 2 illustrates the Revco
Ultima II Cryogenic Freezer control panel.
Note:
Figure 2 shows all possible functions. These functions
vary depending on the options. You may not have all of
the functions on your equipment. The CO
2
or LN
2
Backup System lights (20, 21, 22) represent status
indicators for a built-in CO
2
or LN
2
backup system,
which is optional
.
1. Three position keyed Power On Switch.
2. Power On Indicator. This indicator lights when power is
connected to the freezer.
3. Temperature Failure Indicator. This indicator lights when the
freezer temperature deviates either above or below the alarm
temperature settings.
4. Power Failure Indicator. This indicator lights when there is a
power failure to the freezer (refer to Section 7 on page 7).
5. Life-Guard Alert Indicator. This indicator lights when the
first stage compressor has gone into a cautionary state of
operation to help prevent failure.
6. Check Fuse Light. This indicator lights when the surge
protector on the main electronic panel is blown by a power
surge (refer to Section 7 on page 7).
7. Alarm Test Pad. Press this pad to start an alarm test (refer to
Section 5.2.5 on page 6).
8. Alarm Reset Pad. Press this pad to reset
slowly
blinking
indicators. Slowly blinking indicators denote that the
condition
has
occurred but is now within the given operating
parameters. This pad is also depressed to temporarily silence
the audible alarm (refer to Section 5.2.4 on page 5).
9. Cold Alarm Setpoint. Press this pad to set the cold alarm
(refer to Section 6.2.3 on page 4).
10. Warm Alarm Setpoint. Press this pad to set the warm alarm
(refer to Section 6.2.3 on page 4).
11. Control Setpoint. Press this pad to set the cabinet temperature
(refer to Section 6.2.2 on page 4).
12. Cabinet Temperature Indicator. This indicator lights when the
temperature display window is showing the cabinet
temperature (refer to Section 6.2.1 on page 4).
13. Digital Temperature Display Window. This window displays
chamber temperature, alarm values, etc. depending on the
operating status of the freezer and the procedure being
performed.
14. Decrement Pad (
). Use this pad to decrease temperature
values.
15. Increment Pad (
). Use this pad to increase temperature
values.
16. Extreme Ambient Alert. This indicator lights when the
ambient temperature has exceeded the upper limit of the
recommended operating range. If the Extreme Ambient Alert
is activated, the ambient environment needs to be improved
for proper function of the freezer.
17. Clean Filter Indicator. This indicator lights when the air
cooled condenser filter is dirty (refer to Section 7 on page 7).
18. Alarm Battery Low Indicator. This indicator lights when the
charge on the alarm battery is low. Press this button to
display the percent of full battery charge in the digital display
window.
19. Voltage Boost Indicator. This indicator lights when incoming
voltage is low and the Voltage Safeguard has been activated
(refer to Section 7 on page 7). Press this pad to display the
current line voltage in the digital display window.
23. Alarm On/Set Point Security Indicator. This indicator lights
when the alarm is activated.Also indicates that Setpoint
Security is activated.
The following indicators are available only when the freezer is
equipped with the optional backup system (refer to Section 6.3.4
on page 6).
20. Backup System Supply On Indicator.
21. Backup System Empty Indicator
22. Backup System Battery Low Indicator.
off
life-guard alert
extreme ambient alert
clean filter
power failure
temperature failure
alarm testalarm reset
cabinet
temperature
control
set point
alarm
battery low
voltage
warm alarm
set point
cold alarm
set point
power on
alarm on
set point security
Ultima
1
15
7
9
10
11
SUPPLY
ON
SUPPLY
EMPTY
BACKUP SYSTEM
BATTERY
LOW
8
23
6
12
13
21
20
22
14
18
19
17
16
2
5
4
3
check
fuse
boost
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
4
6.2 Start Up
Refer to Section 6.1 and Figure 2 on page 3 as you complete the
following procedures.
6.2.1 Turning the Power On
To start up your cryogenic freezer, complete the following steps:
1. Plug the freezer into the power outlet (refer to Section 4.2 on
page 2).
2. Turn the key switch to the POWER ON position. The Power
On LED and the Cabinet Temperature LED illuminate.
Note:
The alarm function is not active at this time. Refer to
Section 5.2.3 for information about setting the alarms. In
addition, the Setpoint Security will be deactivated in this
key position.
3. The unit will start about 30 seconds later.
6.2.2 Setting the Cabinet Temperature
To set the cabinet temperature, complete the following steps:
1. Press and hold the Control Setpoint pad.
2. The Control setpoint LED lights and the Cabinet
Temperature LED goes out.
3. Press and hold
to increase the temperature or
to
decrease the temperature. The digital display scrolls through
temperature settings.
4. Release both pads when the digital temperature display
window shows the correct setpoint value.
Note:
If no keys are pressed within ten seconds, the
temperature display reverts to the cabinet temperature.
6.2.3 Setting the Alarms
To set the cold alarm, complete the following steps:
1. Confirm that the key switch is at the Power On position
(Setpoint Security disabled)
2. Press and hold the Cold Alarm Setpoint pad. The LED next
to this pad lights. The temperature display shows the Cold
Alarm value.
3. Press and hold
or
to adjust the Cold Alarm Setpoint.
4. Release both pads when the digital temperature display
window shows the correct setpoint value.
To set the warm alarm, complete the following steps:
1. Confirm that the key switch is at the Power On position
(Setpoint Security disabled).
2. Press and hold the Warm Alarm Setpoint pad. The LED next
to this pad lights. The temperature display shows the Warm
Alarm value.
3. Press and hold
or
to adjust the Warm Alarm Setpoint.
4. Release both pads when the digital temperature display
window shows the correct setpoint value.
When the cabinet temperature drops below the Warm Alarm
setting, turn the key switch to ALARM ON. The freezer is ready
to operate.
Note:
If a power failure lasting over 30 seconds occurs, the
POWER ON light goes out and the POWER FAILURE
light and digital temperature display flash
simultaneously.
WARNING!
You must turn the three-position key
switch to the ALARM ON/SETPOINT SECURITY
position to activate the alarm and place it in security
operation.
6.2.4 Alarm Reset & Status Lights
The alarm reset feature ensures user acknowledgment of the
occurrence of certain alarm conditions. This provides greater
monitoring power by alerting the user if an alarm condition has
occurred during periods when the freezer must be left
unattended. The alarm conditions incorporating this feature are:
•
Temperature Failure-Warm Alarm
•
Temperature Failure-Cold Alarm
•
Voltage Low
•
Power Failure
•
Life-Guard Alert
•
Extreme Ambient Alert
During any of these alarm conditions, the corresponding
indicator will flash quickly, approximately 90 times per minute.
If the alarm condition then disappears, the flash rate will
decrease to approximately 15 times per minute. The indicator
will then remain flashing at this rate, unless the condition
reoccurs, until the Alarm Reset button is pressed. Once this has
occurred, the indicator will no longer be lit.
In the case of TEMPERATURE FAILURE-WARM ALARM and
TEMPERATURE FAILURE-COLD ALARM, if these
conditions have occurred but are now within the given limits, the
two indicators will alternately flash (180° out of phase). In
addition, for these two temperatures failures, the highest
temperature and lowest temperature, respectively, during the
error condition will be saved. Prior to the temperature failure
being reset, the temperature extreme may be viewed by pressing
the Cabinet Temperature pad in conjunction with either the
Warm Alarm Setpoint pad or the Cold Alarm Setpoint pad.
Note:
Once the Alarm Reset button is depressed, the extreme
temperature value is reset to the current cabinet
temperature.
6.2.5 Alarm Test
To test the cold and warm alarms, complete the following steps:
1. Press and hold the Alarm Test pad. The digital temperature
display indicates rising temperature. When the temperature
reaches the warm alarm value, the alarm sounds.
Note:
The temperature of the refrigerated space does not
change during this procedure. Only the sensor is heated.
2. Release the Alarm Test pad, the sensor and display return to
cabinet temperature in a few minutes.
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
5
You can press the Audio Silence pad to silence the alarm but the
alarm will ring back in five to seven minutes. You can silence the
alarm in this manner as many times as necessary until the sensor
cools below the warm alarm temperature. The alarm quits
automatically when the sensor cools below the warm alarm
value.
Note:
There is a limit on the alarm test feature. The alarm test
will not commence if the warm alarm setpoint is more
than 15 degrees warmer than the operating temperature
setpoint.
6.3 Backup System (Optional)
When you purchase a built-in LN
2
optional backup system for
the freezer, the backup system control panel is located behind a
hinged panel adjacent to the grill (refer to Figure 3).
Note:
Always purchase the cylinders which are equipped with
siphon tubes for withdrawing liquid from the bottom of
the cylinder. LN
2
bottles are functional at any reasonable
temperature.
Use this panel to set the backup initiation temperature, usually
10 to 15
°
C warmer than the operating setpoint.
Figure 3. Control Panel for Optional
Built-In Backup System
6.3.1 LN
2
Precautions
The following are precautions for using liquid LN
2
backup
systems.
WARNING!
If an LN
2
cylinder falls and a valve is
knocked off, the cylinder becomes a deadly and
completely unguided missile. Transport the cylinders
in a handtruck or cart with secure chain ties for the
cylinder. After cylinders are connected to the
equipment, securely attach them with chains to a
solid, stationary object such as a building column.
WARNING!
LN
2
liquid is non-poisonous but it is
very cold and will burn unprotected skin. Always wear
protective eyewear and clothing when changing
cylinders or working on the piping systems attached to
an active source of liquid refrigerant.
WARNING!
The gases produced by evaporation of
LN
2
are non-poisonous but displace the oxygen in a
confined space and can cause asphyxiation.
Do not
store the cylinders in subsurface or enclosed areas
.
CAUTION!
When closing the cylinder valve, make
sure that the injection solenoid is energized to allow all
the liquid to bleed off instead of being trapped in the
supply tubing. Failure to do this results in activation of
the pressure relief device, which could damage the
freezer and requires replacing if it is activated.
CAUTION!
For chest models ordered with factory
installed built-in backup systems, the flow of liquid LN
2
will be discontinued if the door or lid is opened during
operation of the backup system. For units operated
with free-standing, field installed type backup system,
the flow of liquid LN
2
will be discontinued upon door or
lid opening
only
if the switch provided with the
free-standing package is installed on the freezer.
TEMPERATURE °C
PUSH
TO SET
SETPOINT
ADJUST
POWER
OFF
ON
Power
Switch
Temperature Control
Setpoint Screw
Temperature Control
Set Button
Digital Temperature
Display
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
6
6.3.2 Installation
Field installed systems are supplied with complete installation
and operating instructions. If your system is factory installed, the
freezer is shipped with a coiled length of tubing to connect the
freezer to the bottles:
•
5/8 in. OD copper tubing covered with Armaflex
™
insulating
tubing for connection to the LN
2
supply.
Straighten the coiled tubing and connect one end to the labeled
connection on the freezer and the other end to the supply bottle or
building supply fitting.
6.3.3 Operation
To activate the optional backup system, complete the following
steps:
1. Push the Power Switch to the ON position. The digital
temperature display window shows the current cabinet
temperature.
2. Press and hold the Push to Set button to display the setpoint
temperature in the digital temperature display window.
3. Use a small screwdriver to rotate the Setpoint Adjust screw
until the correct backup operating temperature shows in the
display window. The recommended setpoint is 10 to 15
°
C
above normal cabinet temperature.
Note:
The temperature shown in the display window is
accurate to
±
1
°
C.
The backup system can run for a minimum of eight hours on
battery power.
WARNING!
You must push the Power Switch to the
ON position in order to activate the backup system.
6.3.4 System Status Lights
In addition to the backup control system, the built-in backup
system includes main control panel system status lights. These
lights are only available when the backup system is installed.
•
The Supply On Indicator lights when the backup system is
operating on battery power.
•
The Backup System Battery Low Indicator lights when the
backup system battery charge is low. The built-in battery
charger recharges the battery to full charge when power is
restored to the system.
Note:
Since rechargeable batteries degrade over time, the
battery should be replaced after approximately three
years.
•
The Backup System Empty Indicator lights when the standby
LN
2
bottle is empty.
Figure 4. Location of LN
2
Connection Site,
Chest Models Only
Table 1.
Backup System Flow Rates – Cryogenic Freezers
Lbs/hr @ 75
×
F
Ambient Temperature
(Flow Rate)
Center Air
Temperature
-150
×
C
-140
×
C
-130
×
C
-120
×
C
Liquid LN
2
Chest Freezers
7 ft
3
Empty
11.3
10.0
9.0
8.0
1/2 Full
9.7
8.6
7.6
6.8
Full
7.8
6.8
6.0
5.2
10 ft
3
Empty
15.2
13.5
11.9
10.3
1/2 Full
12.0
10.4
9.4
8.3
Full
8.9
7.8
7.0
6.1
24.75"
2.375"
LN
2
Inlet Conn.
Copper Tubing
Factory Supplied
0.625" O.D.
MACHINE COMPARTMENT
REAR VIEW
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
7
7 Maintenance and Troubleshooting
WARNING!
Unauthorized repair of your freezer will
invalidate your warranty. Contact Technical Service at
1-800-438-4851 for additional information.
CAUTION!
Maintenance should only be performed
by trained personnel.
7.1
Condenser Maintenance
7.1.1 Cleaning the Condenser
Clean the condenser at least every six months; more often if the
laboratory area is extremely dust prone.
To clean the condenser, complete the following steps:
1. Pull the grill open.
2. Remove the filter. Check the fans. If a fan is not operating,
contact an Authorized Service Company immediately.
3. Vacuum the condenser.
4. Replace the filter and close the grill.
7.1.2 Cleaning the Condenser Filter
Clean the condenser filter every two or three months.
1. Pull the grill open.
2. Remove the filter.
3. Shake the filter to remove loose dust, rinse the filter in clean
water, shake the excess water from the filter, and replace the
filter.
4. Close the grill.
7.2
Gasket Maintenance
Periodically check the gaskets around the door or lid for
punctures or tears. Leaks are indicated by a streak of frost which
forms at the point of gasket failure. Make sure that the cabinet is
level (refer to Section 5.3 on page 2 for leveling information).
Keep the lid gasket clean and frost free by wiping gently with a
soft cloth.
7.3
Defrosting the Freezer
Defrost the freezer once or year or whenever the ice buildup
exceeds 3/8”.
To defrost, complete the following steps:
1. Remove all products and place in another cabinet.
2. Turn off the freezer.
3. Open the outer door and all inner doors.
4. Let the freezer stand with the door open for at least 24 hours.
This allows both the interior and foamed refrigerant system
to warm to room temperature.
5. Dispose of the ice and wipe out any water standing in the
bottom of the cabinet.
6. If there is freezer odor, wash the interior with a solution of
baking soda and warm water. Clean the exterior with any
common household cleaning wax.
7. Close the doors, restart the freezer and reload, following the
instructions in Section 3.1 on page 1.
7.4
Alarm Battery Maintenance
Have a technician check the condition of the alarm battery at
least once a year.
To replace the alarm battery, complete the following steps:
1. Remove the front grill. The alarm battery is located directly
behind the grill. The terminals are the “push on” type.
2. Grasp the terminal with pliers and work it gently back and
forth while pulling it off. The fittings are tight.
3. Remove the battery and put the new battery in place.
Note:
You may have to cut a strip of silicone rubber in order to
remove the battery.
4. Connect the battery terminals and replace the front grill.
7.5
Frame Heater Switch
Cryogenic chest freezers (-140º and -150º C) have a frame heater
switch which can be used to prevent or remove condensation
near the freezer compartment lid. The switch is located in back of
the unit near the top center, to the right of the junction box.
Turning the switch to the up position heats up the frame around
the lid.
Heating the frame has no effect on interior cabinet temperature.
You can turn on the switch whenever there is condensation near
the lid.
7.6
Troubleshooting Procedures
Table 2.
Troubleshooting Procedures
Problem
Solution
Check Fuse
indicator is on.
Surge protector is blown. Call an Electronics
Technician to check the equipment.
Clean Filter
indicator is on.
Condenser filter is dirty. Refer to Section 7.1.2.
Alarm Battery Low
indicator is on.
Alarm battery is low on charge. Have a
technician check the alarm battery. Refer to
Section 7.4.
Voltage Boost
indicator is on.
Low incoming line voltage to the freezer. Call an
electronics technician to check the power supply.
No display, no fans
running.
No power to the unit. Call a qualified electrical
service technician to check the service breaker
to the outlet.
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
8
8 Chart Recorders
Panel-mounted six-inch seven-day recorders are available as
options for all freezer models.
8.1 Set Up and Operation
To prepare the recorder to function properly, complete the
following steps:
1. Open the recorder door to access the recorder.
2. Connect the nine volt DC battery located at the recorder’s
upper right corner. This battery provides backup power.
3. Install clean chart paper (refer to Section 8.3 below).
4. Remove the plastic cap from the pen stylus and close the
recorder door.
Recorder operation begins when the system is powered on.The
recorder may not respond until the system reaches temperatures
within the recorder’s range.
Figure 5. Chart Recorder
Figure 6. Chart Buttons
8.2 Power Supply
The recorder normally uses AC power when the system is
operating. If AC power fails, the LED indicator flashes to alert
you to a power failure. The recorder continues sensing cabinet
temperature and the chart continues turning for approximately
24 hours with back-up power provided by the nine-volt battery.
The LED indicator glows continuously when main power is
functioning and the battery is charged.
When the battery is low, the LED flashes to indicate that the
battery needs to be changed.
8.3 Changing Chart Paper
To change the chart paper, complete the following steps:
1. Locate the pressure sensitive buttons at the front, upper left
of the recorder panel.
2. Press and hold the Change Chart button (#3) for one second.
The pen will move off the scale.
3. Unscrew the center nut, remove the old chart paper, and
install new chart paper. Carefully align the day and time with
the reference mark (a small groove on the left side of the
recorder panel).
4. Replace the center nut and hand tighten. Press the Change
Chart button again to resume temperature recording.
8.4 Calibration Adjustment
This recorder has been accurately calibrated at the factory and
retains calibration even during power interruptions. If required,
however, adjustments can be made as follows:
1. Run the unit continuously at the control setpoint temperature.
Continue steady operation for at least two hours to provide
adequate time for recorder response.
2. Measure cabinet center temperature with a calibrated
temperature monitor.
3. Compare the recorder temperature to the measured cabinet
temperature. If necessary, adjust recorder by pressing the left
(#1) and right (#2) chart buttons.
Note:
The stylus does not begin to move until the button is held
for five seconds.
If you find that the recorder frequently needs to be calibrated
after paper changes, the program may have changed. To confirm
that the program is correct:
1. Press button #3 and allow the pin to move off the scale.
2. Press #1 for 10 seconds and release.
3. Confirm that the green LED flashes 3 times followed by a
pause. If the number of blinks is greater than or less than 3,
adjust the number using the left (#1) and right (#2) chart
buttons.
4. When the green LED blinks 3 times to confirm the resetting,
press the #3 button. The pin arm should then return to
indicate the current temperature. Repeat Steps 1-3 if
necessary.
9 Volt Battery
I
mprinting
Stylus
Hub-Nut and
Retaining Wire
Chart
Chart Buttons
Reference
Mark
1
2
3
CHANGE CHART
9
Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
WEEE Compliance
WEEE Compliance
. This product is required to comply with the European
Union’s Waste Electrical & Electronic Equipment (WEEE) Directive 2002/96EC.
It is marked with the following symbol. Thermo Fisher Scientific has contracted
with one or more recycling/disposal companies in each EU Member State, and this
product should be disposed of or recycled through them. Further information on
Thermo Fisher Scientific compliance with these Directives, the recyclers in your
country, and information on Thermo Scientific products which may assist the
detection of substances subject to the RoHS Directive are available at
www.thermo.com/
WEEE Konformittät
. Dieses Produkt muss die EU Waste Electrical & Electronic
Equipment (WEEE) Richtlinie 2002/96EC erfüllen. Das Produkt ist durch
folgendes Symbol gekennzeichnet. Thermo Fisher Scientific hat Vereinbarungen
getroffen mit Verwertungs/Entsorgungsanlagen in allen EU-Mitgliederstaaten und
dieses Produkt muss durch diese Firmen widerverwetet oder entsorgt werden.
Mehr Informationen über die Einhaltung dieser Anweisungen durch Thermo
Fisher Scientific, die Verwerter und Hinweise die Ihnen nützlich sein können, die
Thermo Scientific Produkte zu identifizieren, die unter diese RoHS.
Anweisungfallen, finden Sie unter
www.thermo.com/
Conformità WEEE.
Questo prodotto deve rispondere alla direttiva dell’ Unione
Europea 2002/96EC in merito ai Rifiuti degli Apparecchi Elettrici ed Elettronici
(WEEE). È marcato col seguente simbolo.Thermo Fisher Scientific ha stipulato
contratti con una o diverse società di riciclaggio/smaltimento in ognuno degli Stati
Membri Europei. Questo prodotto verrà smaltito o riciclato tramite queste
medesime. Ulteriori informazioni sulla conformità di Thermo Fisher Scientific con
queste Direttive, l’elenco delle ditte di riciclaggio nel Vostro paese e informazioni
sui prodotti Thermo Scientific che possono essere utili alla rilevazione di sostanze
soggette alla Direttiva RoHS sono disponibili sul sito
www.thermo.com
/
Conformité WEEE.
Ce produit doit être conforme à la directive européenne
(2002/96EC) des Déchets d’Equipements Electriques et Electroniques (DEEE). Il
est marqué par le symbole suivant. Thermo Fisher Scientific s’est associé avec une
ou plusieurs compagnies de recyclage dans chaque état membre de l’union
européenne et ce produit devraitêtre collecté ou recyclé par celles-ci. Davantage
d’informations sur laconformité de Thermo Fisher Scientific à ces directives, les
recycleurs dans votre pays et les informations sur les produits Thermo Scientific
qui peuvent aider le détection des substances sujettes à la directive RoHS sont
disponibles sur
www.thermo.com/
Deutschland
Italia
France
Great Britain
Important
For your future reference and when contacting the factory, please have the
following information readily available:
Model Number:
Serial Number:
Date Purchased:
The above information can be found on the dataplate attached to the
equipment. If available, please provide the date purchased, the source of
purchase (manufacturer or specific agent/rep organization), and purchase
order number.
IF YOU NEED ASSISTANCE:
SALES DIVISION
Phone:
828/658-2711
800/252-7100
FAX:
828/645-3368
LABORATORY PARTS and SERVICE
Phone:
800/438-4851
FAX:
828/658-2576
TECHNICAL SUPPORT
Phone:
800/438-4851
Thermo Fisher Scientific Inc.
275 Aiken Road
Asheville, NC 28804
United States
www.thermofisher.com
39125H51 Rev. D