Olicom 9600 manual Cti-Cryogenics

Maintenance

CTI-CRYOGENICS

HELIX TECHNOLOGY CORPORATION

2.Purge the regulator and charging lines as follows:

a.Open the regulator a small amount by turning the adjusting knob clockwise until it contacts the diaphragm, then turn approximately 1/8 to 1/4 turn more, so that the regulator is barely open.

b.Loosely connect the charge line to the helium pressure regulator.

c.Slowly open the bottle valve, and purge the regulator and line for 10 to 15 seconds. Turn the regulator knob counterclockwise until the helium stops flowing.

3.Remove the flare cap of the gas charge flared fitting on the rear of the Compressor.

4.Loosely connect the charging line from the helium pressure regula- tor to the 1/4-inch male flare fitting installed on the helium charge valve. Purge the charge line again, as in step a, for 30 seconds, and tighten the charge line flare fitting onto the gas charge fitting while the helium is flowing.

5.Set the helium pressure regulator to 300 psig (20.7 bars). If the compressor is ON, proceed with step a. If the compressor is OFF, proceed with step b.

a.Obtain the previously recorded normal system operating pressure from the Compressor Operation procedure in Section 4 - Operation. Open the gas charge control valve very slowly and allow helium to flow until the compressor gauge reading is the same as the value obtained from Section 4. Quickly close the gas charge control valve.

b.Obtain the appropriate (50 or 60 Hz) static system operating pressure from Table 4-1. Open the gas charge control valve very slowly and allow helium to flow until the compressor gauge reading is the same as the appropriate value in Table 4-1. Quickly close the gas charge control valve.

6.Ensure that the helium charge valve on the Compressor is tightly closed. Shut off the helium pressure regulator on the helium bottle and remove the charging line from the male flare fitting. Reinstall the flare cap.

5-6 P/N 8040540