Section 2. Considerations before Installation
2.3.3 Directions for using cooling water
Rc 3/8 female pipe thread is used for both “Cooling water inlet” and “Cooling water outlet”.
It is recommended to install a filter in the “Cooling water inlet” line in order to remove
contaminant in the cooling water.
Installing a water flow meter in the cooling water line of the compressor is also
recommended.
It is recommended to have an air blower in your facility to drain the compressor. To use an
air blower, connect the hose for the air blower to the “Cooling water inlet” fitting instead of
the cooling water pipe which is used usually.
2.4 Length of cables and flexible hoses
Standard length of optional cables and flexible hoses are listed in Table2-4.
Table 2-4 Standard cables and flexible hoses
Item Standard length [m] Quantity
Input power cable 3 1
Cryocooler cable 3 1
Flexible hose 3 2
NOTE: Please contact our Service Engineering Division or the nearest customer
support center for different length of cables and/or flexible hoses.
2.5 Remote functions
Compressors can be remote-controlled from customer’s equipment side.
The following provides information on features and functions of the remote interface and
the time chart of signals. It is also available to select an operating mode of the compressor
in accordance with your applications. The following information also contains instructions
for selecting operating modes.
2.5.1 Remote Interface Specifications
Remote Interface Specifications are indicated in Table 2-5.
Table 2-5 Remote interface specifications
Item
Specification
Model Signal Quantity
C30HVRT
Input 3
Photo Coupler Isolation Input
Maximum Input voltage: 26VDC, Input Current: less than
8mA
Rated Input Voltage: ON:20V and above, OFF:3V or less
Output 2
No-voltage a contact
Maximum Load: 30VDC / 100mA
2-6
ULVAC CRYOGENICS INCORPORATED
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