Operation
7-4
7.5.3 Cooling water input and output
If possible, Cryomech recommends keeping a regular record of the input and output
cooling water temperatures and of the cooling water flow rate. The RS232/488 port can
be used to remotely monitor and record the water temperature data.
7.6 Disassembling the system for transport or storage
Use the following steps to prepare a Cryomech Reliquefier for eventual transport or
storage.
1) Make sure that the display on the front panel indicates that the compressor system is
OFF.
2) Disconnect the power to the system by switching the front panel breakers to the OFF
position
3) Disconnect the main power to the system by switching the dedicated circuit breaker
to the OFF position.
4) Disconnect the power cord from the external breaker panel. Coil up the power cord in
preparation for transport or storage.
5) Disconnect the cold head motor cord from the cold head and from the compressor.
Coil the cold head motor cord in preparation for transport or storage.
6) Disconnect the instrumentation cord from the reliquefier.
7) Turn off the water supply at the source.
8) Using two wrenches disconnect the supply and return water lines from the inlet and
outlet fittings by turning the fittings counter-clockwise until they are released from the
fittings. Store the connectors for transport or storage.
9) Drain the water from the compressor package. Blow remaining water out with
compressed air.
IMPORTANT
Do not continue with the remaining steps until the cold head temperature has risen
above 150K. If the cold head is disconnected from the system while below 150K,
helium will expand within the cold head as it warms, escape through the pressure
relief valve and require the user to recharge the system with helium before it would
again operate properly.
10) Using the wrenches supplied in the tool kit, disconnect the high and low pressure flex
lines from the compressor package by turning the Aeroquips counter-clockwise with
one wrench while holding the other wrench to prevent the flex line from twisting. See
Figure 7-1.
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