REVCO Ultima II-9 User manual

REVCO
39125H01 Rev F
© 2002 Revco
All rights reserved
Printed
In U.S.A
Chest and
Upright Freezers
Installation and Operation Manual
Table of Contents
About Legaci® ............................. 1
Safety Considerations
...................... 1
General Recommendations
.................. 1
Pre-Installation
............................ 1
Installation
............................... 2
Operation (Ultima™ and
Elite™ Freezers) ....... 4
Operation (Value™ Freezers)
................. 9
Operation (Countertop Freezers)
............. 1O
Maintenance and Troubleshooting ............ 11
Chart Recorders .......................... 12
Optional Equipment
....................... 13
Accessories
.............................. 13
Warranty
................................ 17

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Table of Contents
Installation and Operation
Chest and Upright Freezers
1 About Legaci® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Cryogenic Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
4 General Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
4.1 Initial Loading ............................................................................ 1
5 Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
5.1 Unpacking ............................................................................... 2
6 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
6.1 Location ................................................................................ 2
6.2 Wiring
.................................................................................. 2
6.3 Leveling ................................................................................ 3
6.4 Door Operation (Upright Models) ............................................................. 3
6.4.1 Opening the Door .................................................................. 3
6.4.2 Closing the Door ............................................. ., ..................... 3
6.5 Pressure Equalization Port .................................................................. 3
7 Operation (Ultima 11-9 and Elite-5 Freezers) ............................................. 4
7.1 Control Panel Features ..................................................................... 4
7.2 Start Up ................................................................................. 5
7.2.1 1urning the Power On ............................................................... 5
7.2.2 Setting the Cabinet Temperature ....................................................... 5
7.2.3 Setting the Alarms .................................................................. 5
7.2.4 Alarm Reset & Status Lights (Ultima II, Ultima and Elite Freezers) ............................. 5
7.2.5 Alarm Test (Ultima II and Elite Freezers) ................................................. 6
7.3 Backup System (Optional) .................................................................. 6
7.3.1 C0
2 and
LN
2 Precautions
............................................................ 6
7.3.2 Installation ........................................................................ 7
7.3.3 Operation ......................................................................... 7
7.3.4 System Status Lights
................................................................ 7
8 Operation (Value Freezers) ...............•.......................................... 9
8.1 Control Panel Features ..................................................................... 9
8.2 Start Up ................................................................................. 9
8.2.1 Turning the Power On ............................................................... 9
8.2.2 Setting the Cabinet Temperature ....................................................... 9
8.2.3 Optional Alarm ..................................................................... 9
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Installation and Operation
Chest and Upright Freezers
9 Operation (Countertop Freezers)
.................................................... 10
9.1 Control Panel Features .................................................................... 1O
9.2 Start Up
................................................................................ 1O
9.2.1 Turning the Power On .............................................................. 10
9.2.2 Setting the Cabinet Temperature ...................................................... 10
9.2.3 Warm Alarm ...................................................................... 10
1o Maintenance and Troubleshooting .................................•................. 11
10.1 Condenser Maintenance .................................................................. 11
10.1.1 Cleaning the Condenser ............................................................ 11
10.1.2 Cleaning the Condenser Filter ........................................................ 11
10.2 Gasket Maintenance ..................................................................... 11
10.3 Defrost Procedures ...................................................................... 11
10.4 Alarm Battery Maintenance ................................................................ 11
10.5 Frame Heater Switch (Cryogenic models only) ................................................. 11
10.6 Power Interruption (Cryogenic models only) ................................................... 11
10.7 Troubleshooting Procedures ............................................................... 11
11 Chart Recorders .................................................................. 12
11.1 Set Up and Operation .................................................................... 12
11.2 Power Supply .......................................................................... 12
11.3 Changing Chart Paper .................................................................... 12
11.4 Calibration Adjustment ................................................................... 12
12 Optional Equipment ............................................................... 13
12.1 Backup Protection Devices ................................................................ 13
12.1.1 Liquid Nitrogen (LN2)
............................................................... 13
12.1.2 Liquid
C0
2
....................................................................... 13
12.1.3 Voltage Safeguard ................................................................. 13
12.2 Remote Alarm
........................................................................... 13
13 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
14 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
14.1 Domestic Warranty
13 Months Full Warranty, Parts and Labor
United States of America and Canada
........................................................ 17
14.2 International Warranty
16 Month Parts Warranty .................................................................. 17
14.3 Extended Warranty Options
................................................................ 17
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1 About Legaci®
All of the Revco ultra-low temperature freezers described in this
manual feature the Legaci® refrigeration system, a combination
of advanced technologies designed specifically to provide
optimal reliability in low-temperature applications.
Legaci systems include:
• Copeland compressors custom-designed for Revco to
minimize bearing wear and operate efficiently under heavy
work loads
• Dupont Suva® refrigerants selected to provide maximum
cooling capacity under low-temperature conditions
• Revco's field-proven cascade refrigeration system design.
All upright models include a pressure equalization port
to combat
the vacuum created after door openings.
2 Cryogenic Models
Some of the freezers described in this manual are cryogenic
models. These models are designed for optimum performance at
-140°C
or -150°C, and it is strongly recommended that you use
these models at these operating temperatures.
If you have a cryogenic model, be sure to read the special
maintenance instmctions in Section 10.5 and Section 10.6.
3 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 poijlntlally 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.
Installation and Operation
Chest and Upright Freezers
4 General Recommendations
The refrigeration system is designed to maintain ultra-low
temperatures with safety in a +32°C (90°F) ambient
environment, only when the freezer is used for storage.
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. Attempting to
utilize this freezer Improperly may jeopardize safety or
cause undue stress or damage to the refrigeration
compressors.
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.
After reading and completing the Safety Considerations,
Pre-Installation, Installation, and Operation sections
of this
manual, tum the Key Switch to the POWER
ON position.
4.1 Initial Loading
When loading the unit with "pre-frozen" materials, the operating
temperature setpoint
of the freezer should be set no lower than
the temperature
of the "pre-frozen" material. Allow the unit to
operate at the setpoint for eight hours. The setpoint may then be
lowered in increments no greater than 10°C. Allow a stabilizing
period
of eight hours for each ten degree adjustment, until the
desired setpoint is achieved.
CAUTION! Failure to follow these procedures or
overloading the unit may cause undue stress on the
compressors
or jeopardize user product safety.
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5 Pre-Installation
5.1 Unpacking
At delivery, examine the exteriorforphysical 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 jive days of delivery. If youfind any damage,
keep the packing materials and immediately report the damage
to the carrier. Do not return goods to Revco 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 subllds are necessary
to
maintain correct temperature, moisture control, and
economy of operation. Upright models do not Include
subllds as they utilize built-In metal Inner doors.
Installation and Operation
Chest and Upright Freezers
6 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.
6.1 Location
Install the unit in a level area free from vibration with a minimum
of six inches of space on the sides, rear, and top. Refer to
Section 6.3 for further instructions on leveling cabinets. Allow
enough clearance so that door
or 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 90°F
(15 to 32°C).
CAUTION! To allow for proper air flow, a minimum
ofsix Inches ofclearance space is required behind the
freezer.
6.2 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.
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Your freezer is equipped with one of five NEMA style plugs
(refer to Figure 1). These plugs meet
UL requirements.
v
=
.
15A-125V 20A-125V 15A-250V 20A-250V 30A-250V
NEMA 5-15P NEMA 5-20P NEMA 6-ISP NEMA 6-20P NEMA 6-30P
Figure 1. NEMA Style Plugs
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.
If you have known voltage stability problems which are outside
the limits
of the freezer rated voltage, we recommended that the
freezer
be equipped with a Voltage Safeguard. Order the Voltage
Safeguard from Revco (refer to Section 12.1.3 on page
13 for
ordeting information).
Note: Revco Ultima 700 and900 Seriesfreezers are equipped
with a standardbuilt-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.
6.3 Leveling
The unit must be le~el 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.
Upright models have adjustable leveling feet which are located
adjacent to the front casters.
6.4 Door Operation {Upright Models)
Revco upright freezer models are equipped with an advanced
Cryolatch™assembly specifically designed for ultra-low
temperature freezers.
Features include:
• One-hand operation
• A front-accessible lock, keyed to match the freezer control
lock
• Hasps for a standard padlock
to provide additional security
• Durable construction for reliable operation and safe product
storage.
CAUTION! When moving the freezer, always grasp
cabinet surfaces; never pull the freezer by the latch
handle.
6.4. 1 Opening the Door
Installation and Operation
Chest and Upright Freezers
1. Remove the padlock if you have one.
2. Move the key into the open position by rotating it counter-
clockwise.
3. Grasp the latch handle (preferably with your left hand) and
pull it toward yourself until the latch disengages from the
cabinet strike.
4. Keep pulling by the latch handle or the integrated door
handle to open the main door.
6.4.2 Closing the Door
Note that the latch does not self-engage automatically when you
close the door. You must rotate the latch into the open position
first.
1. Grasp the latch handle (preferably with your left hand) and
pull it toward yourself, rotating the latch into the open
position.
2. Move the freezer door into the closed position and gently
push the handle away from you, making sure that the latch
engages fully with the cabinet strike.
CAUTION! Closing the door without making sure
the latch engages fully with the strike can result in
substantial prying forces on the door.
3. Keep applying gentle pressureJo the latch handle until the
latch
is securely in closed poition.
4. Insert the key and rotate clockwise to lock.
5. Replace the padlock if you are using one.
6.5 Pressure Equalization Port
When an upright ultra-low temperature freezer door is opened,
room temperature air rushes into the storage compartment.
When the dooris closed, thefixed volume
of air is cooled rapidly.
Pressure drops below atmospheric pressure, resulting in a
substantial vacuum. Re-entry into the cabinet is impossible until
internal pressures are returned to atmospheric pressure. Without a
pressure equalization mechanism, it can take several minutes
before the door can easily be reopened.
All upright models feature a port that provides vacuum relief
after door openings.
The pressure equalization port
is located in the bottom front
center
of the storage chamber. Although the port is designed to
self-defrost, excessive frost accumulation in the bottom
of the
chamber could eventually restrict air flow. Therefore you should
periodically inspect the port and brush away any loosefrost using
a stiff nylon brush.
WARNING! Because the defrost heater for the
pressure equalization port operates continuously, the
surfaces near the port can get hot if the unit Is plugged
In but the freezer is not In use. You can avoid this by
unplugging the freezer when It Is not being used for
cold storage.
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Installation and Operation
Chest and Upright Freezers
7 Operation (Ultima 11-9 and Elite-5 Freezers)
7.1 Control Panel Features
UltimJ;r..,,,
~i,_11 12\ _2_.~ 20~ 2~1 BACKUPSYSTEM ~22 -;123
~'
0
-hec''k', - \I BC SUPPLY -SU-PP-LY ___ DA-ITE-·RY , power/ I
~us_g J t - a c ci E~PTY L'bW, ~ ~o~st ~
cabinet
temperature
control
set point
16
17
9 10 14 15
Figure 2. Ultima II 900 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 Chest and Upright Freezer control panel.
Note: Figure 2 shows allpossiblefunctions. These functions
vary depending
on the model and options. You may not
have all
of thefunctions on yourequipment. Elite models
do
not include the Check Fuse indicator light (6) or the
Power Boost light (23) as these models
do not come
standard with these options. Likewise, only Ultima II
models will include the Set Point Securityfeature (24
),
Life-Guard Alert indicator light (5 ), and the Extreme
AmbientAlert indicator light (16). The
C0
2
or LN2
Backup System lights (20, 21, 22) represent status
indicators
for a l'JUilt-in C0
2
or LN
2 backup system,
which is optional on Ultima
II, Ultima or Elite models.
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. PowerFailure Indicator. This indicator lights when there is a
power failure to the freezer (refer to Section 10
on page 11 ).
5. Life-Guard Alert Indicator (Ultima II Models only.) This
indicator lights when the first stage compressor has gone into
a cautionary state
of operation to help prevent failure.
6. Check Fuse Light (Ultima II and Ultima Models only). This
indicator lights when the surge protector on the main
electronic panel is blown by a power surge (refer to
Section 10 on page 11).
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 7.2.3 on page 5).
10. Warm Alarm Setpoint. Press this pad to set the warm alarm
(refer to Section 7.2.3 on page 5). '
11. Control Setpoint. Press this pad to set the cabinet temperature
(refer to Section 7.2.2 on page 5).
12. CabinetTemperature Indicator. This indicator lights when the
temperature display window is showing the cabinet
temperature (refer to Section 7.2.1 on page 5).
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 (.6.). Use this pad to increase temperature
values.
16. Extreme Ambient Alert (Ultima II Models only). 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 properfunction
of the
freezer.
17. Clean Filter Indicator. This indicator lights when the air
cooled condenser filter
is dirty (refer to Section 10 on
page 11).
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 Low Indicator. This indicator lights when incoming
line voltage to the freezer is low. Press this
pad to display the
current line voltage in the digital display window.
23. Power Boost Indicator (Ultima II and Ultima Models only).
This indicator lights when the Voltage Safeguard is active
(refer to Section 10
on page 11).
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24. Alarm On/Set Point Security Indicator. This indicator lights
when
the alarm is activated.Also indicates that Setpoint
Security
is activated (Ultima II Models only).
The following indicators
are available only when the freezer is
equipped with the optional backup system (refer to Section 7.3.4
on page 7).
20. Backup System Supply On Indicator.
21. Backup System Empty Indicator
22. Backup System Battery Low Indicator.
7.2 Start Up
Refer to Section 7.1 and Figure 2 on page 4 as you complete the
following procedures.
7.2.1 Turning the Power On
To start up the Ultima 900, Ultima 700 and Elite 500 Series
Freezers, 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 alarmfunction is not active at this time. Refer to
Section 5.2.3
for information aboutsetting the alarms. In
addition,
for Ultima II units only, the Setpoint Security
will be deactivated in this key position.
7.2.2 Setting the Cabinet Temperature
To set the cabinet temperature, complete the following steps:
1. For Ultima II units, 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 v 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.
7.2.3 Setting the Alarms
To set the cold alarm, complete the following steps:
1. For Ultima II units only, 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 L:::.. or v 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. For Ultima II units only, confirm that the key switch is at the
Power On position (Setpoint Security disabled).
Installation and Operation
Chest and Upright Freezers
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 L:::.. or v 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 powerfailure lasting over 30 seconds occurs, the
POWER
ON light goes out and the POWER FAILURE
light and digital temperature displayflash
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.
7.2.4 Alarm Reset & Status Lights (Ultima JI, U/tima
and Elite Freezers)
The alarm reset feature ensures user acknowledgment of the
occurrence ofcertain 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 (Ultima II
only)
• Extreme Ambient Alert (Ultima II only)
During
any ofthese 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 ofTEMPERATURE 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.
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7.2.5 Alarm Test (U/tima II andElite Freezers)
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.
You can press the Audio Silence pad to silence the alarm but the
alarm will ring backin 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 testfeature. The alarm test
will
not commence ifthe warm alarm setpoint is more
than 15 degrees warmer than the operating temperature
setpoint.
7.3 Backup System (Optional)
When you purchase a built-in C0
2 or
LN
2 optional backup
systemfor 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 liquidfrom the bottom of
the cylinder. C0
2 cylinders must be kept at room
temperature to function properly.
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.
Digital Temperature
Display~
/-BS I
TEMPERATURE 'C
POWER
OFF
0
PUSH
TO SET
Temperature Control
Setpoint Screw
1-1 0
LJ SETPOINT
'---~-~~O-N~~1~~~A-D_J_us_T~~~~~
Power
Switch
Temperature Control
Set Button
Figure 3. Control Panel for Optional
Built-In Backup System
Installation and Operation
Chest and Upright Freezers
Note: Value Series units use free-standing, field installed
Backup Systems.
7.3.1 C0
2 andLN2 Precautions
The following are precautions for using liquid C0
2 and LN2
backup systems.
WARNING! If a C0
2 or
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!
C0
2 and
LN
2 liqulds are non-poisonous
but are 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
C0
2 or
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 cl0slng 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 and upright models ordered
with factory installed built-in backup systems, the flow
of liquid
C0
2 or
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
C0
2 or
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.
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7.3.2 Installation
Field installed systems are supplied with complete installation
and operating instructions. Ifyour system
is factory installed, the
freezer is shipped with a coiled length
of tubing to connect the
freezer to the bottles:
• 3/8 in. OD copper tubing for connection to the
C0
2 supply.
• 5/8 in. OD copper tubing covered with Armaflex™ insulating
tubing for connection to the LN2 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.
7.3.3 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 ±l°C.
The backup system can run for about 80 hours on battery power.
WARNING! You must push the Power Switch to the
ON position
In order to activate the backup system.
7.3.4 System Stlltus 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 sf:wuld be replaced after approximately three
years.
•
The Backup System Empty Indicator lights when the standby
C0
2
or LN2 bottle is empty.
Installation and Operation
Chest and Upright Freezers
let Conn.
C02 In
Copp
Factory
erTubing
Supplied
m
D
0.2 5" O.D.
""
2
-
I<;
2.375"-
~
4.75" •
MACHINE COMPARTMENT
REAR VIEW
(•)
Figure 4. Location of C0
2 Connection Site,
Chest Models Only
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Table 1. Backup System Flow ijates -Cryogenic Freezers
Lbs/hr @ 75°F
Ambient Temperature
(Flow Rate)
Center
Air
-1so0c ·140°C -1ao0c -120°c
Temperature
Liquid LN2
Chest Freezers
Empty 11.0 9.5 8.4 7.3
5
ft
3 1/2 Full 9.3 8.0 7.0
6.1
Full 6.5 5.9 5.1 4.5
Empty 11.3 10.0 9.0 8.0
7 ft
3 1/2 Full 9.7 8.6 7.6 6.8
Full 7.8 6.8 6.0 5.2
Empty 15.2 13.5 11.9 10.3
10 ft
3 1/2 Full 12.0 10.4 9.4 8.3
Full 8.9 7.8 7.0
6.1
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