Sumitomo SRDK Series - 5-1 GENERAL INFORMATION FOR THE MAINTENANCE

OPERATION MANUAL Sumitomo Heavy Industries, Ltd.
SRDK Series CRYOCOOLER 44
5-1 GENERAL INFORMATION FOR THE MAINTENANCE
<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 the CSA-71A (air cooled, low voltage type), sufficient space is
required for venting. Failing to secure sufficient space may result in misoperation or
malfunction. (See the CSA-71A technical instruction, for details.)
If the compressor unit used is the CSA-71A (air cooled, low voltage type), it should be installed
in a clean environment. Installing it in a dusty environment such as inside a factory will require
frequent cleaning of the cooler fins or may result in misoperation or malfunction.
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.
5-1 GENERAL INFORMATION FOR THE MAINTENANCE
The SRDK CRYOCOOLER system is to be required the routine maintenance for long term and continuous
as every 10,000 Hrs on an actual installation.
The basic maintenance work is to replace the existing Cold Head composed of acting parts for every
10,000 Hrs operation and additional replacement of oil mist Adsorber of the Compressor Unit for every
20,000 Hrs operation as mentioned in Table 5.1.
Table 5.1 MAINTENANCE SCHEDULE
MAINTENANCE FREQUENCY REMARKS
Replace Cold Head’s parts
(Parts inside Cold Head)
Every 10,000 Hrs.
Not a User’s Maintenance
Return the Cold Head to SHI.
Replace Compressor Adsorber Every 20,000 Hrs.
Charge Helium Gas to Compressor As required
Compressor Fuse Replacement As required
Cleaning Air Cooler
(Air-Cooled Compressor)
At least one time per year
Depending on the Compressor
site conditions.
Cleaning Water Line
(Water-Cooled Compressor)
As required Depending on the Water Quality
CAUTION