TECHNICAL INSTRUCTION Sumitomo Heavy Industries, Ltd.
CSW-71C 21
3 MAINTENANCE
3 MAINTENANCE
<Warning about electric shock>
This cryocooler includes a high-voltage section. Touching it may result in electric shock. Handle it with extreme
care.
Make sure no power is applied to the compressor unit before starting the installation. Failing to observe this precaution
may result in electric shock.
Be sure to turn off and Lock Out with OFF position the main power of the customer's power source before connecting
or disconnecting the input power cable to the Compressor Unit, and then remove the input power cable from the main
power. Failing to observe this precaution may result in electric shock.
Do not change the setting of the dial above the main power switch of the compressor unit under any circumstances.
Failing to observe this precaution may result in electric shock.
Be sure to turn off and Lock Out with OFF position the customer's main power before performing maintenance work
such as replacement of fuses. Failing to observe this precaution may result in electric shock.
<Warning about explosion, escape of gas>
This cryocooler (cold head, compressor unit, compressor adsorber, flex lines) contains a high-pressure (about 1.62
MPa helium gas sealed in. Hitting the equipment with a sharp edge or touching it with a pointed object may cause
explosion or escape of gas. Handle the equipment with extreme care.
Do not disassemble the equipment for purposes other than maintenance specified in this service manual under any
circumstances. Disassembling the equipment may result in electric shock, explosion or escape of gas.
The cold head, compressor unit, compressor adsorber and flex lines are pressurized with helium gas. Purge the
helium gas from all pressurized components before disposing. Open the purging valve gradually or it may result in
serious injury.
When scrapping the CryoCooler, handle it as Industrial Waste and pass it over to legally qualified disposer.
Install the cryocooler in the ventilated area, otherwise it may result in asphyxiation in case the helium gas is purged or
leaked.
The Adsorber weight is about 11.0kg. When replace the adsorber, be careful of handling so that it may not get hurt.
<Caution against misoperation>
Do not get on the compressor unit or put an object on top of it. Failing to observe this precaution may prevent the
cryocooler from operating normally or cause injury.
Secure enough space around the compressor unit for heat radiation and maintenance. Failing to secure enough
space may result in misoperation or malfunction. (See the technical instruction of the compressor unit used, for
details.)
If the compressor unit used is a water-cooled type (CSW-71C, CSW-71D), use cooling water with appropriate
temperature, flow rate and water quality. Using inappropriate cooling water may result in misoperation or
malfunction. (See the technical instruction of the compressor unit used, for details.)
The cold head drive switch provided with the compressor unit is only used for maintenance. Be sure to turn it OFF
in normal operation. Using the compressor unit with the cold head drive switch turned ON may result in
misoperation or malfunction.
WARNING
WARNING
CAUTION
WARNING
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