OPERATION MANUAL Sumitomo Heavy Industries, Ltd.
SRDK Series CRYOCOOLER 23
2-6 COMPRESSOR UNIT INSTALLATION
INSPECTION
Prior to the installation, inspect the Compressor Unit as describe below;
1） Inspect the compressor overall exterior for damage, and evidence of oil leakage.
2） Make sure that the static pressure is specified value with supply pressure gauge of the Compressor
Unit. The static pressure needs to be adjusted for the type of Cold Head as described follows;
RDK-408D2 --------- 1.60 - 1.65 MPa at 20 deg.C (68 deg.F)
RDK-408D (16.3 - 16.8 kgf/cm
2
G, 232 - 239 psig)
RDK-415D
RDK-408S2 --------- 1.45 - 1.50 MPa at 20 deg.C (68 deg.F)
RDK-408S (14.8 - 15.3 kgf/cm
2
G, 210 - 217 psig)
RDK-400B
If the gauge reads less than specified value, refill Helium gas as described in Section 5-4.
If the gauge reads 0 MPa (0 kgf/cm
2
G, 0 psig), there is a risk of helium contamination and the
Compressor Unit must be replaced.
3） Inspect following parts of the Compressor Unit before installation for evidence of damage.
(a) Overall exterior.
(b) Supply and Return Aero-quip type fittings.
(c) Gas charge Aero-quip type fittings.
(d) Oil leakage around the base panel.
INSTALLATION
Install the Compressor Unit to a level surface (less than 5 degrees). During installation, do not tilt the
Compressor Unit more than 30 degrees. The Compressor Unit can travel with 4 casters, and two of them
are with lock-devices. After positioning the Compressor Unit, the casters can be locked.
Check the site conditions as described in Section 2-4.
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