HELIX 8200 Operating And Service Instructions page 18

Installation
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3-8
3. Connect the helium-gas supply line from the gas-supply connector
on the rear of the compressor to the gas-supply connector on the
cold head.
4. Attach the supply and return line identification decals (CTI-sup-
plied) to their respective connecting piping ends.
5. Verify proper helium supply static pressure by confirming that the
helium pressure gauge reads 245-250 psig (1690-1725 kPa), in an
ambient temperature range of 60 to 100°F (16 to 38°C).
Do not operate the 8200 Compressor unless a Cryopump or Waterpump
is connected to the system.
If the indicated pressure is higher than 250 psig (1725 kPa), reduce the
pressure as follows:
a. Remove the flare cap from the gas charge fitting located on
the rear of the compressor.
b. Open the gas charge valve very slowly. Allow a slight
amount of helium gas to escape until the helium pressure
gauge reads 250 psig (1725 kPa).
c. Close the gas charge valve and reinstall the flare cap.
If the indicated pressure is lower than 245 psig (1690 kPa), add helium gas
as described in Adding Helium Gas.
6. Make the following electrical connections.
The compressor ON/OFF power switch on the front of the compressor
must be in the OFF position before making any and all electrical connec-
tions.
a. Connect the cold head power cable to the rear panel of the
compressor and the other end to the electrical power con-
nector on the high-vacuum pump cold head.
b. Connect the compressor input power cable to the power
source.
c. Turn on compressor.
d. Your system is now ready for operation.
WARNING
WARNING
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C TI CRYOGENICS
HELIX TECHNOLOGY CORPORATION
P/N 8040353