Cryomech LNP-40, Инструкция по установке, эксплуатации и текущему обслуживанию

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Operation
7-3
8) Check the N
2
generator/filter bank panel for air leaks.
9) Make certain there is a flow of air out of the N
2
generator’s vent.
10) Check the pressure gauge on the dewar. The gauge will slowly increase to a final
pressure of approximately 7 PSIG.
11) To purge the system, completely open the extraction line valve. A flow of gas out of
the purging plug should be noticeable.
12) Allow the system to run in this condition for one hour to remove any contaminants in
the system.
13) Close the extraction line valve.
14) Remove the purging plug from the extraction line.
7.4 Starting the helium compressor
With the installation and dewar purge procedure complete, make the following checks
before starting the helium compressor.
7.4.1 Checks before operating
1) Check the system pressure - the gauges should read the pressure specified in
Section 5.
•
If the pressure is too high, vent some of the helium following the instructions in
Section 6.
•
If the pressure is too low, add helium following the instructions in Section 8.
2) Make sure the dewar cord is connected to both the compressor and the dewar.
3) If applicable, make sure the optional electrical protection device’s cord is attached to
the receptacle on the front panel of the helium compressor.
4) Make sure all Aeroquip
®
couplings are securely fastened and the helium flex lines
are oriented correctly.
5) Make sure the input power meets the specifications on the identification label.
CAUTION
A voltage deviation of more than 10% above or below the voltage rating can cause
compressor motor overheating and possible failure.
Indications of voltage operation
outside that range will void the compressor warranty .
6) If the system is water cooled, make sure the flow rate and temperature range of the
cooling water meet the requirements specified in Section 5.
7) Check that the dedicated circuit breaker is on.
8) If applicable, make sure the optional refrigerated air dryer is operating; the dryer’s
power switch light will be illuminated.
9) Check the pressure in the dewar. The gauge should read approximately 7 PSIG.
10) Check the compressed air pressure. The gauge mounted on the filter bank’s high
pressure regulator should read 85 PSIG (5.9 bar).
11) Check the operation of the automatic drain valve on the compressed air filter bank by
pressing the manual override switch. Compressed air should vent from the valve for