Taylor-Wharton CP Series - Manual (Page 4)

Transportation
Refrigeration Construction
Although these refrigerators are rugged, they can be
damaged if abused or otherwise mishandled. A specifi-
cally designed hardshell shipping container (refer to the
parts section for ordering information) should be used
any time the refrigerator is transported. This container will
help prolong the life of the unit and should be replaced if
damaged during use. When moving or transporting a
refrigerator, take every precaution to prevent sliding, tipping,
bumping or dropping the unit. Keep the unit upright.
Although there is no safety hazard if the properly filled
refrigerator is on its side, the refrigerant consumption is
much greater with the unit in this portion and holding time
will be significantly reduced.
A cryogenic refrigerator is really two containers, one
within another. High technology insulation is used in
sealed vacuum space between the inner and outer
containers. The integrity of the vacuum is the key to
continued performance.
All refrigerators fail eventually. A perfect vacuum
system that does not leak cannot be achieved. Some
minute leakage of air molecules into the vacuum occurs
from moment of manufacture. A “Vacuum Maintenance
System”, consisting of materials that trap and hold these
molecules is built into the vacuum space to prolong the
service life of the refrigerant by many years.
The Vacuum Maintenance System can intercept these
trace leaks of air molecules only up to a point. The
vacuum will then become less efficient and the holding
time of the unit will become shorter.
The most frequent cause of vacuum failure is abuse. The
inner container as well as the weight of the nitrogen
refrigerant is supported by the necktube. A blow to the
refrigerator may cause the necktube to deform or break.
Any unit subjected to physical abuse or mishandling will
fail more rapidly than one that has been carefully
handled.