Taylor-Wharton 24K w/ AutoTend - Manual (Page 2)

Text Format Notation
In this owner’s manual we use some special text formats to denote certain portions of
the system. These are listed below:
• Menu is indicated in ALL CAPS BOLD.
•
Actual Menu Choices are indicated in ALL CAPS.
•
Start Fill and Stop Fill sensor are indicated in ALL CAPS ITALICS.
• Specific Menu Descriptions under a main category are listed in Italics.
Safety
Liquefied Gases
Extremely cold refrigerant – Cover Eyes and Exposed Skin – Accidental contact
of the skin or eyes with any cryogenic liquid or cold gas may cause a freezing injury
similar to frostbite. Protect your eyes and cover your skin when handling stored
product and when transferring liquid, or in any instance where the possibility of
contact with liquid, cold pipes, and cold gas may exist. Safety goggles or a face shield
should be worn when transferring liquid. Long-sleeved clothing and gloves that can
be easily removed are recommended for skin protection. Cryogenic liquids are
extremely cold and will be at a temperature of -196ºC (-320ºF) under normal atmo-
spheric pressure.
Keep Equipment Well Ventilated – Although the liquefied gas refrigerant used in
this equipment is non-toxic and non-flammable, it can cause asphyxiation in a con-
fined area without adequate ventilation. An atmosphere that does not contain enough
oxygen for breathing will cause dizziness, unconsciousness, or even death. These
gases cannot be detected by the senses and will be inhaled normally as if they were
air. Ensure there is adequate ventilation where this equipment is used and store liquid
refrigerant supply containers only in a well ventilated area
Liquid Nitrogen System – The liquid nitrogen supply pressure at the inlet to the
refrigerator should be in the range of 10 psig (0.7bar/69 kPa) to 20 psig (1l4bar/138
kPa) for optimum performance. Higher operating pressures will increase transfer
losses and create excessive turbulence of the liquid in the refrigerator which can
generate false signals to the liquid level controller causing the refrigerator to underfill.
In “liquid phase” storage applications, excessive turbulence can cause splashing
which could result in personal injury and/or damage to the refrigerator. When install-
ing piping or fill hose assemblies, make certain a suitable safety relief valve is in-
stalled in each section of plumbing between shut-off valves. Trapped liquefied gas will
expand greatly as it warms and may burst hoses or piping causing damage or per-
sonal injury. A relief valve is installed in the refrigerator plumbing to protect the line
between the customer supplied shut-off valve and the refrigerator solenoid valve.
Warning: Inlet pressure should not exceed 22 psig (1.5bar/152 kPa).
Higher pressures could result in damage to equipment and/or
sufficient depletion of oxygen in the atmosphere to cause
dizziness, unconsciousness, or death.
Note:
For detailed information on the
handling of cryogenic liquids,
refer to the Compressed Gas
Association publication: P-12
“Safe Handling of Cryogenic
Liquids” available from the
Compressed Gas Association
Inc., 1235 Jefferson Davis
Highway, Arlington, VA 2202.