Olicom 9600 manual Operation, Adjusting System Helium Pressure, Compressor Helium Static Charge

9600 Compressor Installation, Operation, and Maintenance

CTI-CRYOGENICS

HELIX TECHNOLOGY CORPORATION

Section 4 - Operation

Adjusting System Helium Pressure

Your CTI-CRYOGENICS high vacuum pump system is comprised of several pressurized components i.e. compressor, flex lines, and cryopumps. Each component is charged with helium before shipment. After all cryopumps, helium lines, and manifolds are attached to the compressor, the system static helium charge pressure must be verified before system operation. Once the static helium system pressure has been verified, the system is ready for operation. After cooldown, the normal system operating pressure is recorded.

NOTE: The 9600 Compressor is designed for continuous operation and should remain ON even when the cryopumps are in a regeneration cycle.

Static Helium System Pressure Verification

The proper system static helium charge pressure is necessary so that the cryopumps operate at maximum performance as well as to assure that the compressor will operate below the maximum design motor winding temperature which will maximize the life of the compressor motor.

1.Make sure the Compressor and Cryopump(s) are OFF.

2.Make sure all system components are connected together as described in Section 3 - Installation.

3.Allow all system components to acclimate to a temperature between 60º F and 80º F (15.5º C - 26.6º C).

4.Read the compressor helium pressure gauge located on the com- pressor rear panel as shown in Figure 1-4. Compare the gauge reading to the appropriate 50/60 Hz line frequency value (depend- ing upon your system installation) indicated in Table 4-1.

Table 4-1: 9600 Compressor Helium Static Charge

Line Frequency	Helium Static Charge Pressure
60 Hz	240 - 250 psig (16.5 - 17.2 bars )
50 Hz	255 - 265 psig ( 17.6 -18.3 bars )

P/N 8040540 4-1