Thermo Scientific Harris Ultra-Low Temperature Freezers
Installation and Operation
1
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.
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.
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.
