Thermo Scientific Revco Cryogenic Storage Freezers
Installation and Operation
1
1 About Cryogenic Models
The freezers described in this manual are
cryogenic
models.
These models are designed for optimum performance at -140ºC
or -150ºC, and it is strongly recommended that you use these
models at these operating temperatures.
Be sure to read the maintenance instructions in Section 7.
2 Safety Precautions
In this manual and on labels attached to this product, the words
WARNING and CAUTION mean the following:
•
WARNING: a potentially hazardous situation which, if not
avoided, could result in serious injury or death.
•
CAUTION: a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury or damage to
the equipment.
Before installing, using or maintaining this product, please be sure
to read this manual and product warning labels carefully. Failure to
follow these instructions may cause this product to malfunction,
which could result in injury or damage.
Below are important safety precautions that apply to this product:
•
Use this product only in the way described in the product
literature and in this manual. Before using it, verify that this
product is suitable for its intended use.
•
Do not modify system components, especially the controller.
Use OEM exact replacement equipment or parts. Before use,
confirm that the product has not been altered in any way.
•
Your unit must be properly grounded in conformity with
national and local electrical codes. Never connect the unit to
overloaded power sources.
•
Disconnect the unit from all power sources before cleaning,
troubleshooting, or performing other maintenance on the
product or its controls.
3 General Recommendations
The refrigeration system is designed to maintain cryogenic
temperatures with safety
only
when the freezer is used for
storage. These models may be used in an ambient environment
up to +25ºC (77ºF).
WARNING!
This unit is not a “rapid-freeze” device.
Freezing large quantities of liquid, or high-water
content items, will temporarily increase the chamber
temperature and will cause the compressors to
operate for a prolonged time period.
Avoid opening the door for extended time periods since chamber
temperature air will escape rapidly. Room air, which is higher in
humidity, replacing chamber air may cause frost to develop in the
chamber more rapidly.
3.1 Initial Loading
After reading and completing the Safety Considerations,
Pre-Installation, Installation, and Operation sections of this
manual, turn the Key Switch to the POWER ON position and
adjust the temperature setpoint if necessary.
The setpoint should be no warmer than -50ºC.
Allow the freezer
to operate at the desired temperature for a minimum of 12
hours before loading.
CAUTION!
IFailure to follow these procedures or
overloading the unit may cause undue stress on the
compressors or jeopardize user product safety.
4 Pre-Installation
4.1 Unpacking
At delivery, examine the exterior for physical damage while the
carrier’s representative is present. If exterior damage is
present, carefully unpack and inspect the unit and all
accessories for damage.
If there is no exterior damage, unpack and inspect the
equipment within five days of delivery. If you find any damage,
keep the packing materials and immediately report the damage
to the carrier.
Do not return goods without written
authorization
. When submitting a claim for shipping damage,
request that the carrier inspect the shipping container and
equipment.
CAUTION!
Do not discard the sublids from
chest-style units.
The sublids are necessary to
maintain correct temperature, moisture control, and
economy of operation.
