5-6 ©2013 Brooks Automation Inc. Pub. No. 8040444, Rev. AA, 01/14/2013 ECO No. 63723
NOTE: Do not open the bottle at this time.
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
regulator 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 - Operation”. Quickly close the gas charge
control valve.
b. Obtain the appropriate (50 or 60 Hz) ("OFF" Condition)
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.
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