SunPower CryoTel MT, Руководство по эксплуатации

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Sunpower Inc. CryoTel MT Operating Instructions version 4
10
VII. Feedthroughs
The electrical pins on the metal plate at the end of the pressure vessel near the balance absorber
are surrounded by glass, which acts as an insulator and prevents helium from leaking out of the
pressure vessel. This arrangement is called a feedthrough. Because of the glass insulator, the
feedthroughs should be handled cautiously. They are a permanent feature of the pressure
vessel back end plate and should not be modified in any way.
The CryoTel MT is shipped with a power cable that attaches to the feedthroughs and the
controller. This wiring harness consists of orange and white 16 gauge wires with a molded
plastic connector for the feedthroughs at one end and a plastic connector housing that plugs
directly into the controller output cable of the same wire colors. This harness is shown in
Figure 6.
Figure 6: Power Cable
It is necessary to remove the balance absorber in order to install the power cable. The balance
absorber is attached with the center M5 screw. Remove this screw and the balance absorber
will be free from the cryocooler.
Install the power cable by aligning the cryocooler feed through pins with the holes in the cable
connector and pressing down. Insert the retaining screw into the connector and tighten.
Install the balance absorber by re-installing the M5 screw.
Important assembly notes:
The heads of the four screws that fasten the balance absorber assembly together
should be facing towards the cryocooler. The nuts for these screws will be on
the top of the balance absorber.
The screw heads of the four balance absorber assembly screws need to be
positioned so that none of them are directly over either the power cord connector
or the service tube elbow. This is to ensure that the screw head does not impact
either of these features during large amplitude displacements of the balance
absorber.