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

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Operation
7-10
CAUTION
A dewar pressure greater than 25 PSIG will destroy the level indicator/switch.
7.7.4 Helium compressor
•
Check and record the high and low pressure readings on the helium compressor
gauges.
•
(Water cooled models only) If possible, Cryomech recommends keeping a regular
record of the input and output cooling water temperatures and of the cooling water
flow rate.
7.7.5 Refrigerated air dryer (optional)
•
Make certain the power switch indicator light is illuminated.
•
Check the dewpoint indicator. It should be in the green zone.
•
Make sure the condensate drain is functioning.
7.8 Shutdown procedure
Press the power switch on the front panel of the helium compressor package. This will
switch off the compressor system and cold head. Switch off the front-panel mounted
circuit breaker to remove power from the helium compressor’s electrical panel. To
completely disconnect power from the helium compressor, switch off its dedicated circuit
breaker.
To shut down the air compressor, switch its dedicated circuit breaker off.
7.9 Disassembling the system for transport or storage
Use the following steps to prepare a Cryomech Liquid Nitrogen Plant for eventual
transport or storage. Assure that all components are stored in appropriate containers and
location.
7.9.1 Helium compressor
1) Make sure that the power switch on the front panel of the helium compressor system
is in the OFF position.
2) Disconnect the power to the helium compressor by switching the front panel breaker
to the OFF position.
3) Disconnect the main power to the system by switching the dedicated circuit breaker
to the OFF position.
4) (Water-cooled models only) Turn off the water supply at the source.
5) Disconnect the helium compressor’s power cord from the external breaker panel. Coil
up the power cord in preparation for transport or storage.
6) Disconnect the dewar cord from the dewar and the helium compressor. Coil the
dewar cord in preparation for transport or storage.
7) (Water-cooled models only) Using two wrenches disconnect the supply and return
water lines from the inlet and outlet fittings by turning the fittings counter-clockwise