Taylor-Wharton 24K w/ AutoTend - Manual (Page 6)

Please use the packing list to check off each item as the system is unpacked. Inspect
for damage. Be sure to inventory all components supplied before discarding any
shipping materials. If there is damage to the system during transit, be sure to file
proper claims promptly with the carrier and insurance company. Please advise
Taylor-Wharton of such filings. In case of parts or accessory shortages, advise
Taylor-Wharton immediately. Taylor-Wharton cannot be responsible for any missing
parts unless notified within 60 days of shipment.
Repackaging for Shipment
If it is necessary to return any part of the system for repair or replacement, a Material
Return Authorization (MRA) number must be obtained from an authorized factory
representative before returning the instrument to our service department. Contact
your distributor for return authorization.
When returning an instrument for service, the following information must be provided
before obtaining an MRA:
A. System model and serial number, and controller serial number
B. B. User’s name, company, address, and phone number
C. Malfunction symptoms
D. Description of System
E. Material Return Authorization (MRA) number
If possible, the original packing material should be retained for reshipment. If not
available, consult Taylor-Wharton for shipping and packing instructions. It is the
responsibility of the shipper to assure that the goods are adequately packaged for
return to the factory.
Liquid Nitrogen Supply Connection
The package included with the refrigerator includes a filter and an elbow. The liquid
fill hose from a low pressure source of liquid nitrogen must be connected to the inlet
through these two fittings. This liquid nitrogen source must have a shut-off valve, and
may be any portable liquid cylinder or a bulk supply. The liquid nitrogen supply
pressure at the inlet to the refrigerator should be in the range of 10 psig (0.7 bar/69
kPa) to 20 psig (1.4 bar/38 kPa) for optimum performance. Higher operating pres-
sures 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 person injury and/or damage to the refrig-
erator.
If the liquid nitrogen supply pressure at the inlet to the refrigerator rises above the
opening pressure of the relief valve on the refrigerator, liquid nitrogen will be dis-
charged into the surrounding area which can cause a rapid and very dangerous
depletion of oxygen in the atmosphere. Once this pressure relief device has opened
and cooled to liquid nitrogen temperature, it will not reseat until it has warmed to near
ambient temperature. THIS COULD PERMIT THE ENTIRE CONTENTS OF THE
LIQUID NITROGEN SUPPLY SYSTEM TO BE DISCHARGED INTO THE IMMEDI-
ATE AREA OF THE REFRIGERATOR(S).
WARNING: In order to prevent the relief device on the nitrogen refrigerator(s)