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Operating Manual:
SU780XLE
SU780XLE-LIT-OM-I |
11.18.19
2. Features of the SU780XLE
2.1 – Free-Piston Stirling Engine
The SU780XLE Ultra-Low Temperature Freezer uses the Stirling Ultracold Model M600
free-piston Stirling engine to provide high efficiency, deep-temperature cooling.
No HCFC or CFC refrigerants are used in the M600 and SU780XLE. The M600 Stirling
engine uses approximately 10 grams of helium gas as a working fluid. Approximately
90 grams of R-170 (Ethane) is used in the thermosiphon which removes heat from
the freezer.
2.2 – Cabinet Design Features
The cabinet utilizes vacuum-insulated panels with non-HFC polyurethane
foam support providing an internal volume of approximately 780 liters. The
environmentally friendly blowing agent is Ecomate®. Door sealing consists of three
gaskets that are fully replaceable. The handle uses cam-actuated, 90° rotation to
apply a mechanical advantage in opening the freezer door. An integrated door
gasket heater minimizes water or ice deposits on the gasket interface.
2.3 - Handle Features
The Stirling Ultracold handle is designed for one-handed operation. A Power-Release
cam assists when the freezer door is adhered to the gasket after long periods of non-
use as well as when air pressure is not yet equalized.
2.4 – Temperature Monitoring Features
One Resistance Temperature Detector (RTD) measures the internal cabinet
temperature of the SU780XLE. The RTD provides input to the controller and the
GUI (Graphical User Interface) display for reporting and logging. The RTD may be
calibrated by the user through the GUI. The GUI provides a door open time-out
alarm and monitors the temperature for instances beyond high and low limits. These
limits can be set automatically or adjusted manually. Alarms are reported through
an audible alarm in the freezer enclosure and through a contact closure that may be
connected to an external alarm. The GUI provides options to temporarily suppress
alarms and set a delay time before the alarm is reported via the contact closure.
B.
Danger
– Risk of Fire or Explosion. Flammable Refrigerant Used.
To be Repaired
Only by Trained Service Personnel.
Component Parts Shall Be Replaced With
Like Components. Do Not Puncture Refrigerant Tubing.
C.
Caution
– Risk of Fire or Explosion. Flammable Refrigerant Used.
Consult
Repair Manual/Owner’s Guide Before Attempting to Service this Product.
All Safety Precautions Must be Followed.
D.
Caution
– Risk of Fire or Explosion.
Dispose of Properly in Accordance
with Federal or Local Regulations.
Flammable Refrigerant Used.
E.
Caution
– Risk of Fire or Explosion Due to Puncture of Refrigerant Tubing;
Follow Handling Instructions Carefully.
Flammable Refrigerant Used.
