Olicom 9600 - Manual (Page 48)

9600 Compressor Installation, Operation, and Maintenance
P/N 8040540 5-5
C
HELIX TECHNOLOGY CORPORATION
- TI CRYOGENICS
• To the value previously recorded in the Compressor Operation
procedure in Section 4 - Operation if the compressor is ON.
3. Close the gas charge control valve and install the flare cap.
Increasing Helium Pressure
Use the following procedure to increase the helium pressure if the
indicated pressure is below the appropriate value as shown in Table 4-1.
CAUTION
If helium is being added more than once every several months, check
for leaks caused by improperly connected self-sealing connections or
any mechanical joint within the Compressor.
Adding Helium
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.
This procedure ensures that both the regulator and the charging line will be
purged of air and that the air trapped in the regulator will not diffuse back
into the helium bottle. For best results, CTI-CRYOGENICS suggests a
dedicated helium bottle, regulator, and line, which are never separated, for
adding helium.
NOTE: You are required to supply the helium charging line terminating in
a 1/4-inch female flare fitting, and a two-stage pressure regulator rated at
0-3000/0-400 psig for this operation.
CAUTION
Use only 99.999% pure helium gas. Helium circuit contamination may
result if a lower quality of helium is used.
1. Attach a regulator (0-3000/0-400 psig) and charging line to a
helium bottle (99.999% pure).
NOTE: Do not open the bottle at this time.