Olicom 9600 manual Reducing Helium Pressure, Compressor Helium Pressure Control Components

Maintenance

CTI-CRYOGENICS

HELIX TECHNOLOGY CORPORATION

Adjusting System Helium Pressure

NOTE: These procedures can be performed on a compressor that is turned ON or OFF. However, the helium pressure gauge should be set to the static helium charge pressure value if the compressor is turned OFF or set to the normal system operating pressure if the compressor is turned ON. Refer to Section 4 - Operation for more information.

Reducing Helium Pressure

NOTE: You must obtain the normal system operating pressure from the Compressor Operation procedure in Section 4 - Operation in order to perform this procedure. If the normal system operating pressure is unknown, then shut the compressor OFF and perform the Static Helium System Pressure Verification procedure in Section 4 - Operation instead.

1.Remove the flare cap from the gas charge fitting as shown in Figure 5-3.

GAS CHARGE FLARED FITTING

HELIUM PRESSURE

GAUGE

GAS CHARGE

CONTROL VALVE

REAR PANEL

Figure 5-3: 9600 Compressor Helium Pressure Control Components

2.Open the gas charge control valve very slowly to allow a slight amount of helium to escape. Leave the valve open until the helium pressure gauge indicates one of the following:

•To the appropriate value in Table 4-1 if the compressor is OFF and acclimated to a temperature between 60º F and 80º F

(15.5º C - 26.6º C).

5-4 P/N 8040540