Thermo Scientific DLT, SLT, ELT Installation & Operating Manual

Installation and Operation Manual

Thermo Scientific Harris® D LT, S LT, a n d E LT
Ultra-Low Temperature Freezers

©

2007 Thermo Fisher Scientific. All rights reserved.

“Suva®” 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 Harris Ultra-Low Temperature Freezers Installation and Operation

Table of Contents

1 Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 General Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.1 Initial Operation and Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

3 Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

4.1 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

4.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

4.3 Voltage Safeguard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

4.4 Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

4.5 Door Operation (Upright Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

4.5.1 Locking the Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

4.5.2 Unlocking the Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

4.5.3 Opening the Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

4.6 Compressor Mounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

4.7 Pressure Equalization Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

5 Operation (Harris DLT and SLT Series Freezers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

5.1 Control Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

5.2 Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

5.2.1 Turning the Power On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

5.2.2 Setting the Cabinet Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

5.2.3 Setting the Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

5.2.4 Alarm Reset & Status Lights (Harris DLT and SLT Series Freezers) . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

5.2.5 Alarm Test (Harris DLT and SLT Series Freezers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

6 Backup System (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

6.1 CO2 and LN2 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

6.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

6.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

6.4 System Status Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

i

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

7 Operation (Harris ELT Freezers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7.1 Control Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

7.2 Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

7.2.1 Turning the Power On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

7.2.2 Setting the Cabinet Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

7.2.3 Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

8 Maintenance and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

8.1 Condenser Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

8.1.1 Cleaning the Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

8.1.2 Cleaning the Condenser Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

8.2 Gasket Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.3 Defrosting the Freezer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

8.4 Alarm Battery Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

8.5 Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

9 Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

9.1 Backup Protection Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

9.1.1 Liquid Nitrogen (LN2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

9.1.2 Liquid CO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

9.2 Circular Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

9.3 Remote Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

10 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

ii

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

1 Safety Considerations

WARNING! Do not modify or change system
components. Replacement parts must be O.E.M.
exact replacement equipment. Modification or use of
the equipment in a manner other than expressly
intended may cause death or serious injury. This
includes use of user-supplied components and
materials not specifically designed for the unit.
Reconfiguring the controller may cause death or
serious injury.

The manufacturer shall not be liable for any damages,
including incidental and/or consequential damages,
regardless of the legal theory asserted, including
negligence and/or strict liability.

Before using, user shall determine the suitability and
integrity of the product for the intended use and that
the unit has not been altered in any way. User
assumes all risk and liability whatsoever therewith.

WARNING! 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 unit to already overloaded
power lines.

WARNING! Disconnect unit from main power
before attempting any maintenance to equipment or
controls.

WARNING! This freezer operates at extremely
low temperatures. Do not work inside the cabinet
without proper covering for your hands and arms.
Even brief exposure at ultra-low temperatures can
damage your skin.

2 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.

2.1 Initial Operation and 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 for two-stage
freezers or -10ºC for single-stage freezers. Allow the freezer to

operate at the desired temperature for a minimum of 12
hours before loading.

Load the freezer one shelf at a time, beginning with the top shelf.
After loading each shelf, allow the freezer to recover to the
desired setpoint before loading the next shelf. Repeat this process
until the freezer is fully loaded.

CAUTION! Failure to follow these procedures or
overloading the unit may cause undue stress on the
compressors or jeopardize user product safety.

3 Pre-Installation

3.1 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.

Note: Note:Do not discard the sublids from chest-style

units.

The sublids are necessary to maintain correct
temperature, moisture control, and economy of
operation. Upright models do not include sublids
because they have built-in ABS plastic inner doors.

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 user
product 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.

1

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

15A-125V

NEMA 5-15P

20A-125V

NEMA 5-20P

15A-250V

NEMA 6-15P

20A-250V

NEMA 6-20P

30A-250V

NEMA 6-30P

4 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.

4.1 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 4.4 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
(15to32°C).

CAUTION! To allow for proper air flow, a minimum
of six inches of clearance space is required behind the
freezer.

4.2 Wiring

CAUTION! Connect the equipment to the correct
power source. Incorrect voltage can result in severe
damage to the equipment.

DANGER! 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 one of five NEMA style plugs
(refer to Figure 1). These plugs meet UL requirements.

CAUTION! Never cut the grounding prong from the
service cord plug. If the prong is removed, the
warranty is invalidated.

4.3 Voltage Safeguard

Freezers are equipped with a standard built-in Voltage Safeguard
circuit to detect and adjust low line voltage.

The Voltage Safeguard helps protect electrical equipment from
damage by boosting low voltage automatically. On Harris DLT
and SLT models a panel light flashes to indicate when deficient
line voltage is being corrected (see Figure 3 on page 4).

4.4 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.

Upright models have adjustable leveling feet which are located
adjacent to the front casters.

4.5 Door Operation (Upright Models)

Upright freezer models are equipped with a special handle cam
assembly which provides ease in opening and closing operations.

4.5.1 Locking the Door

1. Close the freezer door and place the handle in a vertical
position.

2. Insert the key horizontally into the lock.

3. Push the key and lock assembly into the handle
approximately 0.25 inch and turn the key clockwise 90
degrees.

4. Continue to depress the key and turn it counterclockwise
back to the starting position. The lock assembly should
remain depressed inside the handle.

5. Remove the key.

4.5.2 Unlocking the Door

1. Insert the key horizontally into the lock.

2. Turn the key 90 degrees clockwise. The lock assembly
automatically springs out until its face is outside the outer
handle casting).

3. Turn the key back to horizontal (counterclockwise
90 degrees) and remove the key.

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.

4.5.3 Opening the Door

1. The door must be unlocked (the face of the lock is flush with
the outer handle casting and not indented into the casting).

2. Grab the upper handle on the front of the freezer and pull it
toward you while rotating it 90 degrees until the handle rests
on the built-in stop.

3. Use the vertical door handle mounted on the left front corner
of the door to pull the freezer door fully open.

2

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

Spring

4.6 Compressor Mounts

Some Harris DLTs are shipped with the compressor mounts
secured. The springs under the compressor mounting feet are
fully compressed by hold-down nuts for shipping. These nuts
must be loosened before the unit is put into operation (refer to
Figure 2).

To loosen the compressor mount springs, complete the following
steps:

1. Remove the end panel on the right side of the machine
compartment to expose the compressor.

2. Use a 3/4 in. box end or socket wrench with ratcheting handle
and a 4 in. extension to loosen the nuts on the compressor
mounts (refer to Figure 2). Loosen the nuts until the
clearance between the bottom of the nut and the top of the
mounting foot is 1/8 in.

3. Inspect the area under each mounting foot for spacer clips.
Any clips must be removed before compressor operation.

4.7 Pressure Equalization Port

When an upright ultra-low temperature freezer door is opened,
room temperature air rushes into the storage compartment.
When the door is closed, the fixed 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 left side of
the storage chamber. Although the port is designed to self­defrost, 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 loose frost using
a stiff nylon brush.

WARNING! To ensure proper operation, be sure not
to obstruct the port. Push any storage racks near the
port all the way to the rear of the cabinet.

WARNING! When the freezer is in operation, avoid
touching the lower left side of the cabinet exterior near
the “hot surface” warning label. The port can get hot
immediately after it is activated.

Figure 2. Compressor Mount Springs

Note: Some of the Harris DLT freezers require loosening the

compressor bolts. This is not necessary for all models.

3

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

OFF

EXTREME

AMBIENT ALERT

CLEAN FILTER

POWER FAILURE

TEMPERATURE

FAILURE

ALARM TEST ALARM RESET

CABIN ET

TEMPERATURE

CONTROL

SET POINT

ALARM

BATTERY LOW

VOLTAGE LOW

WARM ALARM

SET POINT

COLD AL ARM

SET POINT

POWER ON

ALARM ON

1 11

2

7

8

9

10

17

18

193

SUPPLY

ON

SUPPLY
EMPTY

BATTERY

LOW

BACKUP SYSTEM

45

6

20 21

12

16

15

1413

SET POINTS

LOCKED

5 Operation (Harris DLT and SLT Freezers)

5.1 Control Panel Features

Figure 3. Harris DLT and SLT Control Panel with Optional Backup System

Before the initial start up, take some time to become familiar
with the controls on your freezer. Figure 3 illustrates the Harris
DLT and SLT Chest and Upright Freezer control panel.

Note: Figure 3 shows all possible functions. These functions

vary depending on the model and options. You may not
have all of the functions on your equipment. Harris DLT,
and SLT models include the Set Points Locked feature
and the Extreme Ambient Alert indicator light (8). The
CO

or LN2 Backup System lights (20, 21, 22) represent

2

status indicators for a built-in CO
system, which is optional on Harris DLT and SLT

or LN2 backup

2

models.

1. Three position keyed Power On Switch.

2. Power On Indicator. This indicator lights when power is
connected to the freezer.

3. Alarm On/Set Points Locked Indicator. This indicator lights
when the alarm is activated. Also indicates that Set Points are
locked.

4. Power Failure Indicator. This indicator lights when there is a
power failure to the freezer (refer to Section 8 on page 10).

5. Temperature Failure Indicator. This indicator lights when the
freezer temperature deviates either above or below the alarm
temperature settings.

6. 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.

7. 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.

8. Clean Filter Indicator. This indicator lights when the air
cooled condenser filter is dirty (refer to Section 8 on
page 10).

9. 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.

10. 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.

11. Alarm Test Pad. Press this pad to start an alarm test (refer to
Section 5.2.5 on page 6).

12. Alarm Reset Pad. Press this pad to reset slowly blinking
indicators. Slowly blinking indicators (the Silent Witness
feature) 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).

13. Cold Alarm Set Point. Press this pad to set the cold alarm
(refer to Section 5.2.3 on page 5).

14. Warm Alarm Set Point. Press this pad to set the warm alarm
(refer to Section 5.2.3 on page 5).

15. Control Set Point. Press this pad to set the cabinet
temperature (refer to Section 5.2.2 on page 5).

16. Cabinet Temperature Indicator. This indicator lights when the
temperature display window is showing the cabinet
temperature (refer to Section 5.2.1 on page 5).

17. Decrement Pad ( ). Use this pad to decrease temperature
values.

18. Increment Pad ( ). Use this pad to increase temperature
values.

The following indicators are available only when the freezer is
equipped with the optional backup system (refer to Section 6.4
on page 7).

20. Backup System Empty Indicator

19. Backup System Supply On Indicator.

21. Backup System Battery Low Indicator.

4

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

5.2 Start Up

Refer to Section 5.1 and Figure 3 on page 4 as you complete the
following procedures.

5.2.1 Turning the Power On

To start up the Harris DLT and SLT 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 audible alarm function is not active at this time.

Refer to Section 5.2.3 for information about setting the
alarms. In addition, the Set Points will not be locked in
this key position.

5.2.2 Setting the Cabinet Temperature

To set the cabinet temperature, complete the following steps:

1. Press and hold the Control Set Point pad.

2. The Control set point 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 set point value.

Note: If no keys are pressed within ten seconds, the

temperature display reverts to the cabinet temperature.

5.2.3 Setting the Alarms

To set the cold alarm, complete the following steps:

1. Confirm that the key switch is at the Power On position (Set
Points not locked).

2. Press and hold the Cold Alarm Set Point 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 Set Point.

4. Release both pads when the digital temperature display
window shows the correct set point value.

To set the warm alarm, complete the following steps:

1. Confirm that the key switch is at the Power On position (Set
Points not locked).

2. Press and hold the Warm Alarm Set Point 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 Set Point.

4. Release both pads when the digital temperature display
window shows the correct set point 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 occurs, the POWER ON light goes out.

After 30 seconds the POWER FAILURE light and the
digital temperature display flash simultaneously.

WARNING! You must turn the three-position key
switch to the ALARM ON/SET POINTS locked
position to activate the audible alarm and place it in
security operation.

5.2.4 Alarm Reset & Status Lights (Harris DLT and SLT
Freezers)

The Silent Witness 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 that activate this
feature are:

• Temperature Failure-Warm Alarm

• Temperature Failure-Cold Alarm

• Voltage Low

• Power Failure

• 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. Unless the
condition reoccurs, the indicator will then continue to flash at
this rate 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 temperature failures, the highest
temperature and lowest temperature, respectively, during the
error condition will be saved. Before you reset after temperature
failure, you can view the temperature extreme by pressing the
Cabinet Temperature pad simultaneously with either the Warm
Alarm Set Point pad or the Cold Alarm Set Point pad.

Once the Alarm Reset button is depressed, the extreme
temperature value is reset to the current cabinet temperature.

5

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

TEMPERATURE ºC

PUSH

TO SET

SET POINT

ADJUST

POWER

OFF

ON

Powe r

Switch

Temperature Control

Set Point Screw

Temperature Control

Set Button

Digital Temperature

Display

5.2.5 Alarm Test (Harris DLT and SLT 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 Alarm Reset 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 set point is more
than 15 degrees warmer than the operating temperature
set point.

6 Backup System (Optional)

When you purchase a built-in CO2 or LN2 optional backup
system for the freezer, the backup system control panel is located
behind a hinged panel adjacent to the grill (refer to Figure 4).

Note: Always purchase the cylinders which are equipped with

siphon tubes for withdrawing liquid from the bottom of
the cylinder. CO2 cylinders must be kept at room
temperature to function properly. LN
functional at any reasonable temperature.

Use the panel below to set the backup initiation temperature,
usually 10 to 15×C warmer than the operating set point.

bottles are

2

Note: Harris ELT Series units and DLT chest models use

free-standing, field installed Backup Systems.

6.1 CO

and LN2 Precautions

2

Observe the following precautions when using liquid CO2 and
LN

backup systems.

2

WARNING! If a CO2 or LN2 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! CO
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
CO

or LN2 are non-poisonous but displace the

2

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 and upright models ordered
with factory installed built-in backup systems, the flow
of liquid CO
lid is opened during operation of the backup system.
For units operated with free-standing, field installed
type backup system, the flow of liquid CO
be discontinued upon door or lid opening only if the
switch provided with the free-standing package is
installed on the freezer.

and LN2 liquids are non-poisonous

2

or LN2 will be discontinued if the door or

2

or LN2 will

2

Figure 4. Control Panel for Optional

Built-In Backup System

6.2 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:

• 3/8 in. OD copper tubing for connection to the CO

• 5/8 in. OD copper tubing covered with Armaflex™ insulating

tubing for connection to the LN

supply.

2

supply.

2

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

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

24.75"

2.375"

CO

2

Inlet Conn.

Copper Tubing

Factory Supplied

0.25" O.D.

MACHINE COMPARTMENT

REAR VIEW

6.3 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 set point
temperature in the digital temperature display window.

3. Use a small screwdriver to rotate the Set Point Adjust screw
until the correct backup operating temperature shows in the
display window. The recommended set point 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 about eight hours on battery
power.

WARNING! You must push the Power Switch to the
ON position in order to activate the backup system.

6.4 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

or LN2 bottle is empty.

CO

2

Figure 5. Location of CO

Chest Models Only

Connection Site,

2

7

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

Table 1. Backup System Flow Rates

Lbs/hr @ 75°F

Ambient Temperature

(Flow Rate)

Center Air Temperature -50°C-60°C-70°C Center Air Temperature -60°C-70°C-80°C

Liquid CO

2

Liquid LN

2

Chest Freezers Chest Freezers

3 ft

Empty 2.832.963.1

3

1/2 Full 2.4 2.7 3.1 1/2 Full 2.2 2.6 2.9

3 ft

3

Empty 2.7 3.1 3.5

Full 1.8 2.1 2.4 Full 1.7 1.9 2.2

7 ft

Empty 4.1 4.7 5.5

3

1/2 Full 3.5 4.0 4.6 1/2 Full 3.3 3.8 4.3

7 ft

3

Empty 3.9 4.5 4.1

Full 2.6 3.0 3.5 Full 2.5 2.8 3.2

10 ft

Empty 4.9 5.6 6.6

3

1/2 Full 4.2 4.8 5.5 1/2 Full 4.0 4.5 5.1

10 ft

Empty 4.7 5.4 6.1

3

Full 3.1 3.6 4.1 Full 3.0 3.4 3.8

14 ft

Empty 5.6 6.5 7.5

3

1/2 Full 4.8 5.5 6.3 1/2 Full 4.5 5.2 5.9

14 ft

Empty 5.4 6.2 7.0

3

Full 3.5 4.2 4.8 Full 3.4 3.9 4.4

17 ft

Empty 6.5 7.5 8.7

3

1/2 Full 5.5 6.3 7.3 1/2 Full 5.3 6.0 6.8

17 ft

Empty 6.2 7.1 8.1

3

Full 4.1 4.8 5.5 Full 3.9 4.4 5.1

20 ft

Empty 7.3 8.4 9.8

3

1/2 Full 6.2 7.1 8.2 1/2 Full 5.9 6.7 7.6

20 ft

Empty 7.0 8.0 9.1

3

Full 4.6 5.4 6.2 Full 4.4 5.0 5.7

Upright Freezers Upright Freezers

13 ft

Empty 7.4 8.5 9.7

3

1/2 Full 6.5 7.4 8.3 1/2 Full 6.1 6.8 7.6

13 ft

Empty 7.0 7.9 8.9

3

Full 5.1 5.9 6.7 Full 4.8 5.4 6.1

17 ft

Empty 8.3 9.5 10.9

3

1/2 Full 7.3 8.3 9.3 1/2 Full 6.7 7.5 8.4

17 ft

Empty 7.7 8.7 9.8

3

Full 5.8 6.6 7.5 Full 5.3 5.9 6.7

21 ft

Empty 8.9 10.2 11.7

3

1/2 Full 7.8 8.9 10.0 1/2 Full 7.3 8.2 9.2

21 ft

Empty 8.4 9.5 10.7

3

Full 6.2 7.1 8.1 Full 5.8 6.5 7.3

25 ft

Empty 9.5 10.9 12.5

3

1/2 Full 8.3 9.5 10.7 1/2 Full 7.9 8.9 10.0

25 ft

Empty 9.1 10.3 11.6

3

Full 6.6 7.6 8.7 Full 6.3 7.1 7.9

Lbs/hr @ 75°F

Ambient Temperature

(Flow Rate)

8

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

1

3

Powe r

OFF

°c

POWER ON

ALARM ON

CONTROL

SET POINT

SET POINT

DISPLAY

With

VOLTAGE BOOST

4

2

7 Operation (ELT Freezers)

7.1 Control Panel Features

Before the initial start up, take some time to become familiar with the controls on your freezer. Figure 6 illustrates the Harris ELT Series
Chest and Upright Freezer control panel.

Figure 6. Harris ELT Series Control Panel

1. Keyed Power On/Alarm On switch.

2. LED digital temperature display.

3. Recessed temperature control set point adjustment.

4. Temperature set point adjust button.

7. 2 S t a r t U p

Refer to Figure 6 as you complete the following procedures.

7.2.1 Turning the Power On

To start up the Harris ELT Series 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 digital temperature display shows the cabinet temperature.

Note: The alarm function is not active at this time.

7.2.2 Setting the Cabinet Temperature

To set the cabinet temperature, complete the following steps:

1. Insert a small screwdriver into the slotted screw labeled Control Set Point and simultaneously press and hold the Set Point Display
button. The temperature display changes to read the existing set point value.

2. Turn the set point screw (clockwise for a colder setting and counterclockwise for a warmer setting) until the desired set point shows
in the digital temperature display.

3. Release the Set Point Display button. The digital temperature display returns to the cabinet temperature.

7. 2 . 3 A l a r m

The Harris ELT’s Alarm is operated by the freezer electronic control system. The alarm is preset at the factory with a cold set point:

• For units designed to operate at -75°C and -85°C, the alarm set point is approximately 90% of the freezer temperature set point. For

example, if the freezer set point is -80°C, the alarm set point is -72°C.

• For units designed to operate at -50°C and warmer, the alarm set point is 80% of the freezer temperature set point. For example, if

the freezer set point is -40°C, the alarm set point is -32°C.

To activate the alarm, wait until the freezer reaches operating temperature and turn the key switch to the ALARM ON position.

WARNING! You must turn the three-position key switch to the ALARM ON position to activate the alarm and place it in
operation.

9

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

8 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.

8.1 Condenser Maintenance

8.1.1 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.

8.1.2 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.

8.3 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 doors 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 2.1 on page 1.

8.4 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.

8.2 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 4.4 on page 2 for leveling information).

Keep the lid and door gaskets clean and frost free by wiping
gently with a soft cloth.

4. Connect the battery terminals and replace the front grill.

8.5 Troubleshooting Procedures

WARNING! Troubleshooting procedures involve
working with high voltages which can cause injury or
death. Troubleshooting should only be performed by
trained personnel.

Table 2. Troubleshooting Procedures

Problem Solution

Clean Filter
indicator is on.

Alarm Battery Low
indicator is on.

Voltage Low
indicator is on.

Condenser filter is dirty. Refer to Section 8.1.2.

Alarm battery is low on charge. Have a
technician check the alarm battery. Refer to
Section 8.4.

Line voltage is low and the freezer has activated
the Voltage boost system to compensate. Call an
electronics technician to check the power supply.

10

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

9 Optional Equipment

The following equipment is available for some freezer models
either as factory-installed or as field-installed options. Refer to
the Accessories section on page 11 for more information on these
and other options, including inventory racks and storage boxes.

For additional information, contact your representative or
Customer Sales at 1-800-221-4201.

9.1 Backup Protection Devices

Liquid Nitrogen and Liquid CO
your product in case of a prolonged power failure. These systems
are powered by a rechargeable battery with a built-in automatic
charger. Refer to Section 6.1 on page 6 for additional
information.

9.1.1 Liquid Nitrogen (LN

This system uses portable and locally refillable bottles. These
containers keep the liquid at low temperature and pressure by
continually venting a small amount of gaseous N
check the liquid level indicator daily to assure an adequate
emergency supply.

systems are available to protect

2

)

2

. You must

2

9.1.2 Liquid CO

2

This system uses portable and locally refillable bottles that are
not vented and have a virtually unlimited standby life unless they
develop a leak. These containers hold liquid at room temperature
and high pressure. Several bottles can be connected together,
increasing the effective length of standby refrigeration.

The coldest center air temperature achievable with CO
is -70º C. For colder temperatures, use LN

.

2

backup

2

9.2 Circular Chart Recorder

Chart recorders can be factory or field installed. If your freezer
does not have a recorder, you can order one for panel, wall, or
freestanding mounting.

9.3 Remote Alarm

The remote alarm terminals on the back of the freezer are
connected to freezer internal dry contacts. You can connect a
remote alarm package with a separate 24 volt power supply.

10 Accessories

Note: For accessories and options not described herein, or for special modifications, contact Sales.

Inventory Rack Capacity Chart for all Freezers

Rack Catalog No.

(Rack Quantity) Box Size in.

For Chest Freezers

5972, Full Rack, (7) 2 in. boxes — 912—————————

5973, Full Rack, (5) 3 in. boxes — 912—————————

5978, Full Rack, (11) 2 in. boxes — — — 12 18 24 30 36 — — — —

6096, Full Rack, (8) 3 in. boxes — — — 12 18 24 30 36 — — — —

6230, Half Rack, (6) 2 in. boxes — — — 24 36 48 60 72 — — — —

6231, Half Rack, (4) 3 in. boxes — — — 24 36 48 60 72 — — — —

For Upright Freezers

6112-1, (12) 2 in. or (9) 3 in. boxes — — — — — — — — 20 — — —

6113-1, (16) 2 in. or (12) 3 in. boxes — — — — — — — — — 20 25 30

1 3.1 4.5 6.8 10.3 13.7 17.1 20.5 13.4 17.2 20.2 24.4

Cubic Foot Capacity

11

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

Inventory Component Description, Ultra-Low

Temperature Freezers

13.4

Cu.ft

Catalog

No.

Catalog

No.

Cu.ft

Description

For All Models

Fiberboard boxes and grid dividers are packaged in lots of one
dozen

Fiberboard box, 5-1/4 in. square x 2 in. high, one dozen. 5954

Fiberboard box, 5-1/4 in. square x 3 in. high, one dozen. 5956

Grid divider, fiberboard, 100 cell, 7/16 in., holds 100 12 mm

vials, one dozen. 5958

Grid divider, fiberboard, 49 cell, 5/8 in., holds 49 16 mm

vials, one dozen. 5959

Grid divider, fiberboard, 64 cell, 9/16 in., holds 64 14 mm

vials, one dozen. 5960

Grid divider, fiberboard, 81 cell, 1/2 in., holds 81 13 mm

vials, one dozen. 6212

Stainless steel box, 5-1/4 in. square x 2 in. high, each. 5955

Stainless steel box, 5-1/4 in. square x 3 in. high, each. 5957

Stainless steel box cover, each. 5953

For Chest Models

Single full rack, holds (7) 2 in. boxes, for 3.1 and 4.5 cu.ft

chest models only. 5972

Single full rack, holds (5) 3 in. boxes, for 3.1 and 4.5 cu.ft

chest models only. 5973

Single full rack, holds (11) 2 in. boxes, for all chest models

except 3.1 and 4.5 cu.ft. 5978

Single full rack, holds (8) 3 in. boxes, for all chest models

except 3.1 and 4.5 cu.ft. 6096

Single full rack, holds (8) plasma boxes, for 3 cu.ft chest

model. 6097

Single full rack, holds (13) plasma boxes, for all chest

models except 3.1 and 4.5 cu.ft. 6098

Single split rack, holds (6) 2 in. boxes, for all chest models

except 3.1 and 4.5 cu.ft. 6230

Single split rack, holds (4) 3 in. boxes, for all chest models

except 3.1 and 4.5 cu.ft. 6231

Basket/Rail Kit, for 6.8 cu.ft chest freezers. 6217

Basket/Rail Kit, for 10.3 cu.ft chest freezers. 6218

Basket/Rail Kit, for 13.7 cu.ft chest freezers. 6190

Basket/Rail Kit, for 17.1 cu.ft chest freezers. 6191

Basket/Rail Kit, for 20.5 cu.ft chest freezers. 6192

Catalog

No.

Description

For Upright Models

Adjustable single stack, holds (12) 2 in. or (9) 3 in. boxes,

for 13.4 cu.ft upright models. 6112-1

Adjustable single stack, holds (16) 2 in. or (12) 3 in. boxes,

for 17.2, 20.2, and 24.4 cu.ft upright models. 6113-1

Solid stainless steel shelf:

for 13.4 cu.ft upright models only. 6667

for 17.2 cu.ft upright models only. 6668

for 20.2 cu.ft upright models only. 6669

for 24.4 cu.ft upright models only. 6670

Inventory Components, Blood Bank Red Cell and

Plasma Freezers

Description

Plasma Rack, single, holds (13) plasma boxes, for all

chest models. 6098

Plasma Rack, single, holds (12) plasma boxes, for

13.4 cu.ft upright models. 6110-1

Plasma Rack, single, holds (16) plasma boxes, for 17.2 and

20.2 cu.ft upright models. 6111-1

Red cell press. 6225

Blood Bank Freezer Inventory Capacity

Freezers Cu.ft/Total Capacity

Rack Catalog No. and

Description

6225, Red Cell Press. 92 204 334 200 —

6098, Plasma Rack, 13
Box Capacity.

6110-1, Plasma Rack,
12 Box Capacity.

6 111-1 , P la sm a Ra ck ,
16 Box Capacity.

a

Example: A 13.7 cu.ft plasma chest freezer holds 24 total

Catalog No. 6098 Plasma Racks.

a

Chest Upright

6.8

13.7

Cu.ft

Cu.ft

12 24 36 — —

———20—

————25

20.5

Cu.ft

20.2

12

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

Temperature Recorders

All six inch recorders use pressure-sensitive chart paper
(1 box @ 50 charts included); no inking is required.

Description

Temperature recorder, 6 in. circular chart, seven-day drive,

panel mounted, for 40°C to -95°C. Not available for
Harris Classic chest models, which use 6383-6.
Factory installed.

Temperature recorder, 6 in. circular chart, seven-day drive,

for -120°C, -140°C, and -150°C models only, panel
mounted. Factory installed. 6183-5

Temperature recorder, 6 in. circular chart, seven-day drive,

free-standing, for all freezers -40°C to -90°C.
Customer installed. 6383-6

Temperature recorder, 6 in. circular chart, seven-day drive,

free-standing, for -95°C, -120°C, -140°C, and -150°C
models only. Customer installed.

Catalog

No.

6183-6

6383-5

Chart Paper

Description

For Mechanical Recorders:

Chart paper, package of 50, 6 in., seven-day recorder,

-150°Cto+20°C. 6186

Chart paper, package of 50, for 6 in., seven-day recorder,

-115°Cto +50°C. 6185

Chart paper, package of 50, for 4 in., seven-day recorder

only, 0°Cto-100°C. 6596

For Electronic Recorders:

Chart paper, package of 50, for 6 in., seven-day recorder,

-115°Cto +50°C. 6185

Catalog

No.

Special Voltages

Standard voltages are listed under Voltage in Specification Charts
associated with each product category. Standard voltages are
available at no charge; alternative voltages may be available at an
extra charge. All voltages must be specified when ordering.
Contact Sales for more information.

Electronic Backup Systems

CO

Backup System. Choose built-in or free-standing. Injects

2

liquid CO
pre-set level. Automatic shut-off on door or lid opening.
Adjustable CO
display and actual cabinet temperature at the push of a button.

into cabinet when cabinet temperature warms to

2

set point in 1°C increments to -75°C with digital

2

Indicator lights when system is activated. System is powered by
continually recharged battery. Includes all hardware except CO
cylinder.

Description

Backup, built-in, panel mounted, factory installed.

CO

2

Harris DLT and SLT freezers only. Low battery indicator
lights when battery needs replacing. Empty cylinder
indicator lights when cylinder is exhausted. 6594

CO

Backup, free-standing, field installed. Specify freezer

2

model number and voltage when ordering. 6593

Backup System. Choose built-in or free-standing. Injects

LN

2

liquid nitrogen into cabinet when cabinet temperature warms to

Catalog

No.

pre-set level. Automatic shut-off on door or lid opening.
Adjustable LN
digital display and actual cabinet temperature at the push of a

set point in 1°C increments to -150°C with

2

button. Indicator lights when system is activated. System is
powered by continually recharged battery. Includes all hardware
except low-pressure liquid nitrogen cylinder.

Description

Backup, built-in, panel mounted, factory installed.

LN

2

Harris DLT and SLT freezers only. Low battery indicator
lights when battery needs replacing. Empty cylinder
indicator lights when cylinder is exhausted. 6595

Backup, free-standing, field installed. Specify freezer

LN

2

model number and voltage when ordering. 6214

Catalog

No.

2

13

Thermo Scientific Harris Ultra-Low Temperature Freezers Installation and Operation

Surge Protection

Surge Protector. Provides protection against external electrical

spikes (temporary high voltage condition). Built-in surge
protection is optional on all freezers models; free-standing surge
protection is also optional on all models.

Description

Free-standing, for all freezer models. Field installed by

qualified electrician or factory authorized service
center. Specify freezer model number and voltage
when ordering. 6402

Catalog

No.

Remote Alarm/Monitoring

Description

Standard Remote Alarm. Provides audible and visual

signal in the event of temperature rise or power failure.
Adaptable to telephone switchboard. Can be located
up to 1/3 mile (1760 ft/536 m) from freezer. Must be
used with factory installed electronic alarm system and
connected to normally-open or normally-closed
remote alarm contacts. Wire not included. Specify
freezer model number and voltage when ordering. 5612

Deluxe Electronic Remote Alarm System. User

programmable to sound alarm in the event of
temperature rise or power failure. Can dial up to four
telephone numbers to advise of alarm condition across
any telephone system which accepts pulse dialing.
One system can monitor up to four individual freezers
or up to three groups of freezers. Contact manufacturer
for detailed specifications. 6224

Catalog

No.

RS-232 Data Port and Software

Description

For use with Harris DLT and SLT models only. Monitors

freezer set point, high and low limit set points and
power supply. Advises of temperature deviation,
voltage boost on, surge intercept, low alarm battery,
and clean filter functions. Auto status report adjustable
in increments of 5 seconds to 2 hours. 6405

Catalog

No.

Extended Warranty Options

Note: In addition to the standard 12-Month full warranty on the

complete product (USA and Canada), an additional four-year
protection on compressor and compressor parts can be supplied.
This additional coverage must be purchased at the time of
original product purchase.

Under this contract, the manufacturer agrees to furnish a
compressor FOB our factory to replace one which has been
determined to be defective by the manufacturer or a factory
authorized Service Agency.

Note: Extended 4-Year Compressor Parts Warranties are

standard on Harris SLT Freezers. These Extended
Warranty Options apply to Harris DLT and ELT
products only.

Operating Temperature Catalog No.

-40°C

-50°C

-75°C

-80°C and -86°C

-120°C 6079

-140°C

-150°C

Description

Extended 12-Month Comprehensive Coverage, for all

models, provides additional 12-month warranty
coverage, parts and labor. Contact Sales for details. 6613

6077

6078

6221

Catalog

Interior Options

Description

Chest Freezer Interiors

Stainless steel interior, 3.1 cu.ft chest. 6121

Stainless steel interior, 4.5 cu.ft chest. 6646

Stainless steel interior, 6.8 cu.ft chest. 6122

Stainless steel interior, 10.3 cu.ft chest. 6123

Stainless steel interior, 13.7 cu.ft chest. 6124

Stainless steel interior, 17.1 cu.ft chest. 6125

Stainless steel interior, 20.5 cu.ft chest. 6126

Upright Freezer Interiors

Stainless steel interior, 13.4 cu.ft upright. 6179

Stainless steel interior, 17.2 cu.ft upright. 6180

Stainless steel interior, 20.2 cu.ft upright. 6181

Stainless steel interior, 24.4 cu.ft upright. 6645

Catalog

Miscellaneous Ultra-Low Temperature Freezer Options

Description

Additional freezer porthole, 1 in. diameter. 6105

Inside delivery (price quoted by region). Contact Sales if

you have special delivery and/or installation
requirements. Through the network of factory
authorized service centers, testing can be arranged
prior to delivery and installation within your facility. 6095

Catalog

No.

No.

No.

14

Thermo Scientific Harris Ultra-Low Temperature 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
our 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
Scientific, dieVerwerter und Hinweise die Ihnen nützlich sein können, die Thermo
Fisher Scientific Produkte zu identizfizieren, 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 Fischer 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/

Great Britain

Deutschland

Italia

Conformité WEEE. Ce produit doit être conforme à la directive euro-péenne

(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 Fisher
Scientific qui peuvent aider le détection des substances sujettes à la directive
RoHS sont disponibles sur www.thermo.com/

France

15

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: [phone]

800/221-4201

FAX: [phone]

LABORATORY PARTS and SERVICE

Phone: [phone]

FAX: [phone]

TECHNICAL SUPPORT

Phone: [phone]

Thermo Fisher Scientific Inc.

275 Aiken Road
Asheville, NC 28804
United States

www.thermofisher.com

38257H01 Rev. J