C30VR Compressor Installation, Operation, Maintenance and Troubleshooting
4-4
ULVAC CRYOGENICS INCORPORATED
Figure 4-4
Connecting and disconnecting helium flexible hoses to
compressor and refrigerator
Disconnecting procedures
To disconnect flexible hoses from the connectors, use only two lipped bowl spanners (bolt
width 26mm, 30mm). Do not use other spanners.
Loosen the couplings with two spanners and then take them off by both hands.
Complete the procedure as quick as possible to minimize helium gas leakage.
4.4 Single cryopump installation
Figure 4-5 shows the connection of the compressor and single cryopump. Connecting
procedures are below.
1. Connect flexible hoses to the compressor unit and to the cryopump as described in
“Section 4.3 Connecting and disconnecting helium flexible hoses”
2. Connect the refrigerator cable to the compressor rear panel and the refrigerator. The
procedures are shown below.
Connect the smaller refrigerator cable plug to the refrigerator receptacle. For a 2
phase motor refrigerator, the plug is self-locking. Fit the plug to the receptacle
connection and push the plug while turning it to lock it. For a 3 phase motor
refrigerator, insert the plug into the receptacle and then turn the rotating part of the
plug to the right. Turn it until it won’t turn any more to connect the plug properly.
Connect the bigger refrigerator cable plug to the compressor receptacle. Connect
the plug to “COLD HEAD POWER NO.1” receptacle on the rear panel of the
Tighten with 30mm spanner
Hold with 26mm inch spanner
Compressor
Helium Connector
SUPPLY GAS/
RETURN GAS
Refrigerator
(
Self-sealing Coupling
)
Clockwise: To tighten
Counter Clockwise: To loosen
If the flexible hoses are disconnected while the cryopump is still cold, the pressure inside
the refri erator will rise as its goes up and cause helium leakage via the pressure relief
g
valve.
CAUTION
Содержание C30MVER
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