OPERATION MANUAL Sumitomo Heavy Industries, Ltd.
SRDK Series CRYOCOOLER 35
2-9 INPUT POWER CABLE CONNECTION
2-9 INPUT POWER CABLE CONNECTION
<Warning about electric shock>
Make sure the power specification of the cryocooler used conforms to the customer's power
supply before using the equipment. Using the cryocooler with a non-conforming power supply
may result in electric shock or malfunction.
If the compressor unit used is the CSW-71D (water cooled, high voltage type), pay attention to
the setting of the applicable input supply voltage. The product is shipped with the input supply
voltage set to 480V. Before installing the equipment, be sure to check your supply voltage and
change it to the appropriate setting if necessary. Operating the equipment with your supply
voltage different from the setting of the compressor unit may result in electric shock or
malfunction.
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.
<Caution against misoperation>
Do not use inverter for the main power source of the compressor unit. Operating with inverter
may result in the damage or malfunction of the compressor electric circuit.
Avoid using the transformer for the main power source of the compressor unit. If the
transformer is installed at the upstream of the unit, lacking phase protection circuit with the
cryocooler occurs in a malfunction. That may result in misoperation or malfunction.
When using the transformer, install the other lacking phase protection device in upstream of the
transformer.
“IMPORTANT”
This cryocooler is provided with a phase reverse protection circuit for the input power. If the input
power is connected with reverse phase, the cryocooler does not start.
“IMPORTANT”
See “TECHNICAL INSTRUCTION” of Compressor Unit used, for detail of Input Power Connection.
WARNING
CAUTION
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