TECHNICAL INSTRUCTION Sumitomo Heavy Industries, Ltd.
CSW-71C 17
2-1 SITE REQUIREMENT
2-1 SITE REQUIREMENT
<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.
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.)
If the compressor unit used is a water-cooled type (CSW-71C, CSW-71D), do not use the demineralized water for
cooling water. Using demineralized water for cooling water may result in water leakage or malfunction. (See the
technical instruction of the compressor unit used, for details.)
・ An almost level and even area in the field will be selected to install the Compressor Unit.
・ An area to be influenced by splashing water and/or dusts will not be selected to install the
Compressor Unit installation area.
・ A clean environmental condition without dirt and/or free from an exhausted heat will be selected to
install the Compressor Unit in the field.
・ A quality of cooling water will be secured to use for an appropriate coolant for the Compressor Unit.
・ Any heat sensitive object cannot be positioned on surroundings of the Compressor Unit.
AMBIENT TEMPERATURE CONDITION
The ambient temperature must be between 5 deg.C and 28 deg.C to get the specified capacity. The
system can operate up to 35 deg.C with less than 5% cooling capacity down. The maximum relative
air humidity is 85%RH.
HELIUM SUPPLY SYSTEM
A helium supply system is necessary if you need to decontaminate the helium gas, or charging the
helium gas that has leaked out of the system. A helium supply system includes a Grade 5 (99.999%
up pure) helium gas bottle, a regulator, an outlet valve, and a charging hose or equivalent delivery
line.
POWER SOURCE
Ensure the correct AC power source is available for the compressor. See Table 1.1 for the power
requirements for your system.
COOLING WATER
Ensure the correct cooling water is available for the compressor. See Figure 1.1 and Table 1.2. for
the cooling water requirements for your system.
Operating with Antifreeze (50/50 % mixture of water and ethylene glycol), the flow rate shall be larger
than the water. See Figure 1.1 and Table 1.2. for the cooling water requirements for your system.
SAFETY / SEISMIC REQUIREMENT
Secure to lock the locking device of compressor castor.
SERVICE AREA
The Compressor Unit should have enough space as shown in Figure 2.1.
CAUTION
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