4 | General Recommendations
Thermo Fisher Scientific ULT Freezers
General Recommendations
Temperature Monitoring
General Usage
This refrigeration system is designed to maintain ultra-low
temperatures with safety in an ambient environment within
15°C to 32°C (59°F to 90°F), only when the freezer is used for
storage.
Avoid opening the door for extended time periods since
chamber temperature air will escape rapidly. Also, keep the
inner doors closed as much as possible. When room air,
which is higher in humidity, replaces chamber air, frost may
develop in the chamber more rapidly.
Initial Loading
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 set point before loading the next shelf. Repeat this
process until the freezer is fully loaded.
Battery Door Opening /
Closing
To open the grille door, pull the door from the top right corner
as shown in the figure below.
To close the grille door, push the door against frame to hold
latch in position.
Figure 1. Door Opening
IMPORTANT NOTE:
Thermo Fisher Scientific
recommends the use of a redundant and
independent temperature monitoring system so
that the freezer can be monitored continuously
for performance commensurate with the value of
product stored.
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.
CAUTION:
Failure to follow these procedures or
overloading the unit may cause undue stress on
the compressors or jeopardize user product
safety.
