ULVAC CRYOGENICS INCORPORATED
S-1
Compressor Unit Safety Instructions
Read this manual and follow these safety guidelines before installing, operating, or
servicing the compressor unit.
Our Cryo-U
®
cryopump and Super trap refrigerator systems make a refrigeration cycle by
circulating high pressure helium gas. Filling helium gas more than the defined amount
does not improve refrigeration capacity
appreciably. Instead, if excessive helium gas is
filled and pressure becomes higher than the defined value, gas will release from the safety
valve and its sheet may become clogged with dirt. This may even cause a leak as well as
overloading of the compressor motor.
Never charge helium gas more than specified in Table 1-1.
When charging helium gas or performing helium line decontamination, refer to the
“Maintenance” section and follow the instruction.
The equipments (regulators, charging hoses, adopters, etc.) that can be used at the
pressure of 2.0MPaG or higher are required to perform the above work.
Do not switch between ON and OFF frequently.
The number of startup and shutdown of the compressor motor must be less than 6 times
per hour and ON or OFF condition should be maintained for at least 3 minutes. Starting up
and shutting down too frequently reduces the insulation life of compressor motor and may
result in failure. When operating multiple refrigerators, the number of startup and
shutdown of the refrigerator motors must be also 6 times or less per hour.
Do not use startup and shutdown to control the temperature of the Super Trap.
Please contact us when it is required to control the Super Trap temperature.
3. Do not switch between ON and OFF frequently
1. Do not Charge Compressor with Excessive
Helium
2. Adding helium gas and charging equipments
Summary of Contents for C15T
Page 2: ......
Page 8: ...F 6 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...
Page 14: ...S 4 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...
Page 16: ...IW 2 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...
Page 34: ...Operation 4 2 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...
Page 38: ...Disconnection and Storage 5 4 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...
Page 46: ...Maintenance 6 8 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...
Page 50: ...Troubleshooting A 4 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...
Page 54: ...Circuit Diagram B 4 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...
Page 57: ...Flexible Hose C 2 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...
Page 61: ...CS 2 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...
Page 63: ...Revisions R 2 ULVAC CRYOGENICS INCORPORATED This page intentionally left blank...