Installation
6-9
6.5.5 Connect the cold head motor cord
1) Note that the female plugs attached to each end of the cold head motor cord are
unique for both the compressor and the cold head.
2) Assure that the cold head motor cord is sufficiently long to reach the cold head. If the
cord length is not sufficient to reach the cold head, adjust the location of the
compressor package or the cold head.
3) To connect the cold head motor cord to the cold head, make sure that the alignment
pins on the receptacle correspond to the alignment grooves on the plug. Turn the
plug sleeve clockwise while pushing the plug into the receptacle. The plug is
designed to “click and lock” when assembly is completed.
4) To connect the cold head motor cord to the compressor, align the pins on the plug
with the grooves on the compressor’s connector. Push the plug onto the connector
and turn the locking ring clockwise until snug.
6.5.6 Remove excess helium from the compressor package
IMPORTANT
The system is shipped from the factory with excess helium in order to allow for some
loss when assembling system components. Complete this step ONLY if the actual
system pressure exceeds the pressure indicated in Step 1, below.
1) Observe both the low and high pressure gauges located on the front panel of the
compressor package and determine which gauge has the lower reading. If the
system helium pressure shown on the lowest reading gauge EXCEEDS the pressure
specified in Appendix A follow the procedures in this step. Otherwise, skip this step
and go to Section 7.
2) Assuming pressures EXCEED those indicated in Step 1, above, first make sure that
the service valve (located on the front panel) is CLOSED (turned fully clockwise).
3) Attach the ¼" service Aeroquip coupling to the service access.
4) Turning the service valve counter-clockwise, open the valve SLOWLY. Do not vent
more than 5 PSIG (.34 bar / 34 kilopascals) of gas per minute.
5) Observe the gauge with the lower reading. Once the gauge reaches the system
helium pressure indicated in Step 1, close the service valve by turning clockwise and
remove the service Aeroquip from the service access.
To Next Page
Loading...