Ulvac SA115-C User manual

D/N. MDCE001E, 2021JU01 ULVAC CRYOGENICS INCORPORATED
Compressor Unit
Instruction Manual
SA115-C
Export Control Policy
When applying a refrigerator to a cryocooler for optical sensors, the
cryocooler falls under row 6.A.2.d.2 of the control list established by
The Wassenaar Arrangement, which is equal to row 10(2) of
appended table 1 of Japan’s Export Trade Control Order.
Customers must follow all related rules and regulations such as
Foreign Exchange and Foreign Trade Act and take appropriate
procedures when exporting or re-exporting our refrigerators.

ULVAC CRYOGENICS INCORPORATED I
Introduction
Thank you for choosing our products. This instruction manual provides information and
precautions on handling, installation, operation, and maintenance of the product.
This product is intended for use by qualified personnel who recognize shock hazards and are
familiar with the safety precautions required to avoid possible injury. To ensure proper use of this
product, read this instruction manual carefully and keep this manual close at hand so that you can
use for reference during operation.
If you purchased our other products and/or optional devices with this product, read relevant
instruction manuals carefully.
General Precautions
(1) It is strictly prohibited to duplicate or reproduce this manual either partially or entirely, or disclose
or transfer to a third party without written permission from ULVAC CRYOGENICS.
(2) Information in this document is subject to change without notice, along with the specification
change or improvement of the product.
(3) If you have any questions or comments on this document, please contact us. The contact details
are listed at the end of this book.

II ULVAC CRYOGENICS INCORPORATED
Safety Considerations
Our products have been designed to provide extremely safe and reliable operation when
properly used. Following safety precautions must be observed during normal operation and
when servicing them.
Low-temperature area present.
There is a risk of frostbite. Do not touch.
CAUTION
WARNING
A warning describes safety hazards or unsafe practices
which could result in severe injury or loss of life.
A caution describes safety hazards or unsafe practices
which could result in personal injury or equipment damage.
Toxic gas or chemicals used.
There is a risk of severe injury upon contact.
Corrosive chemicals used.
There is a risk of severe injury upon contact.
Flammable gas used.
There is a danger of fire or burn injury.
Explosive gas used.
There is a risk of fire or explosion.
Hazardous voltage .
Electric shock may cause severe injury or loss of life.
Hot heating part present.
There is a risk of burn injury.

ULVAC CRYOGENICS INCORPORATED III
Table of Contents
Safety Instructions····························································································1
Disposal Considerations····················································································2
1. Unpacking and Inspection·············································································3
2. Transportation····························································································3
3. Compressor Description···············································································4
3.1 Specifications ··························································································· 4
3.2 Overview ································································································· 5
3.3 Instructions for the Electrical System ···························································11
4. Installation······························································································· 17
4.1 Conditions for Installation···········································································17
4.2 Installation ······························································································18
5. Operation ································································································ 22
5.1 Start Operation ························································································22
5.2 Stop Operation·························································································23
5.3 Checking Normal Operation ·······································································23
6. Maintenance···························································································· 24
6.1 Scheduled Maintenance ············································································24
6.2 On-Site Repair·························································································26
7. Troubleshooting························································································ 28
8. Accessories and Parts ··············································································· 31
8.1 Standard Accessories·················································································31
8.2 Optional Parts··························································································31
9. Electrical Diagram····················································································· 32
10. Warranty ································································································· 33

IV ULVAC CRYOGENICS INCORPORATED
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ULVAC CRYOGENICS INCORPORATED 1
Safety Instructions
Make sure to turn OFF the main power source before performing installation, maintenance
or repair. Contacting the internal parts that are not insulated may damage human body or
equipment such as electrical shock.
Connect the earth wire to D type grounding.
High pressure helium gas is sealed inside this equipment. Make sure to remove gas
before disassembling for repair or disposing.
Do not use this device in the corrosive gas atmosphere (e.g. chloride). It may result in
injury or damaging devices.
Internal parts, such as compressor motor or exhaust piping are in extremely high
temperature during and immediately after operation.
When performing repair or maintenance activities, wait until the inside returns to the normal
temperature and start working. Otherwise, it may result in burn injury.
1. Danger of electric shock exists.
Do not touch the live part.
2. Danger of explosion exists.
Do not expose to corrosive gases.
3. Danger of burns exists.
Never touch high temperature parts.

2ULVAC CRYOGENICS INCORPORATED
Do not disassemble, pressurize, heat, and/or throw into fire. The adsorber may
explode.
For safe disposal of an adsorber, follow the procedures below.
1) Depressurize high pressure helium
gas in the adsorber to an ambient
atmospheric pressure. To do so safely, connect the proper tools such as our
charging adaptor (for refrigerator maintenance).
2) Before proceeding with disposal work, remove the couplings of the adsorber to
visually confirm that it has been depressurized.
Disposal Considerations
The equipment and component parts must be disposed in accordance with applicable local and
domestic standards for industrial wastes.
We offer Safety Data Sheet (called SDS) of our products upon your request. For detailed
information please contact our Service Engineering Division or the nearest customer support
center.
WARNING

ULVAC CRYOGENICS INCORPORATED 3
1. Unpacking and Inspection
Upon receiving the compressor unit SA115-C, immediately check for any damage that may have
occurred during transportation with the following procedures.
1. Check for any visible dents, etc., on the shipping carton. Keep the packing for shipping in case
you need to make a claim regarding dents, etc.
2. Remove the carton and check for dents, etc., on the compressor unit.
Never tilt the compressor unit more than 10 degrees.
Tilting the compressor may result in compressor failure or oil leaking into the helium gas pipes.
Make sure there are no defects about the following (a) - (c).
(a) Overall exterior
(b) Oil leaks
(c) Helium gas charge pressure
The pressure gauge indicates the helium charge pressure of 1.9MPa at 20°C (helium charge
pressure may vary depending on the system configurations).
If the pressure gauge reading is below 1.90MPa, add helium gas following the procedures
described in “6.1.2. Charging Helium Gas”.
When the pressure gauge indicates 0MPa, some impurities may be mixed in the helium gas and
the unit is required to be replaced.
If you encounter any problem, please contact us.
2. Transportation
When transporting the compressor unit, be sure to follow the procedures below.
・Put protection caps to all self-sealing couplings for safe shipping.
・Pack the equipment with the packing materials used at the time of delivery.
・Securely and correctly pack the compressor unit.
・Attach “No Tilting” and “This Side Up” caution labels.

4ULVAC CRYOGENICS INCORPORATED
3. Compressor Description
3.1 Specifications
Table 3.1 shows the specifications for Helium Compressor Unit SA115-C.
Table 3-1 Compressor Unit SA115-C Specifications
Compressor unit SA115-C
Power source φ, V, Hz Three-phase, 200, 50/60
Power consumption ＊１ kW 1.6/1.9
Operating current ＊１ A 6.0/6.7
Over current protection ＊２
(Supplied by customer) A 15
Ambient temperature °C 4-38
Refrigerant Helium gas
With purity of 99.999 % or
above
Refrigerant filling pressure MPa 1.90±0.05 (20°C)
Dimensions
Height mm 484
Width mm 494
Depth mm 494
Weight kg 59
Safety Valve Setting MPa 2.84-3.24
Connec
tion
Refrigerant ［SUPPLY］1/2”self-sealing coupling
Refrigerant ［RETURN］1/2” self-sealing coupling
Scheduled maintenance Change adsorber every 30,000 hours
Note）*1. Figures when connected with a cryopump unit.
*2. The compressor unit is not equipped with overcurrent protection. Customers are
requested to install overcurrent protection device (circuit breaker) on the customer’s
system. Refer to 4.2.3 Electrical Wiring for the detail.

ULVAC CRYOGENICS INCORPORATED 5
3.2 Overview
The function of a compressor unit is to supply high-pressure helium gas to the
ultra-low-temperature refrigerator and recompress the helium gas returning from the
refrigerator.
The main components of a compressor unit include compressor motor, refrigeration system, oil
separator, or adsorber.
3.2.1 Control and Connection
Table 3.2 and Diagram 3.1 show the control and connection of SA115-C.
Table 3-2 Control and Connection of the Compressor Unit
No.
Item
Function
1 OPERATION switch
(SW1)
・
Press to start or stop the compressor unit.
Press the upper half of the switch to start operation.
Press the lower half of the switch to stop operation.
・
For remote operation, leave this switch ON and use the remote
operation
function (EXTERNAL OPERATION Switch, to be procured
on-site).
・In the event blackout occurs during operations, when the electricity is
restored, operations will automatically continue .
2 HOUR METER (HM)
The time counter indicates the total hours of operation of the
compressor unit.
3 SUPPLY PRESSURE
Pressure meter.
When not in operation, indicates the helium gas charge pressure.
During operation, indicates the compressed helium gas pressure
(supply pressure).
4
HELIUM GAS CHARGE
Port for helium gas supply.
5
SUPPLY
Helium gas supply port. Connect flexible hose (Supply side) to this port.
6 RETURN
Return gas port for helium gas. Connect flexible hose (Return side) to
this port.
7 REF POWER: (CN1)
Connection port for the cable connector to supply power to the
refrigerator.
8 REMOTE : (CN2)
Connection port for the cable connectors to start/stop operation
remotely, and to pick up alarm signal.
9 L / R Switch
To switch between LOCAL operation and REMOTE operation.
L: Start and stop operations with the OPERATION switch.
R: When the OPERATION
switch is ON, run/stop of operations is
possible using the LOCAL/REMOTE (EXTERNAL OPERATION)
switch.
10
FUSE 250V3A
F1, F2, F3
Use flathead screwdriver to exchange fuses.
11 SIGNAL(CN5)
Connection port for the cable connector when the operation/warning
signal are extracted.

6ULVAC CRYOGENICS INCORPORATED
Figure 3-1 SA115-C Control and Connection Components
NAME PLATE LABEL
484
460
(5)
(5)
(58)426
494
85
259
70 100
391
381
(167) (167)
66
8.5
160
(59) (59)
376
60
494
４
２
３
１
１１
５
６
１０
７
９
８

ULVAC CRYOGENICS INCORPORATED 7
3.2.2 Flow of Gas and Oil in the Compressor Unit
Figure 1.2 shows the flow of helium gas and oil in compressor unit SA115-C.
Figure 3-2 SA115-C Helium gas flow
Helium Flow
Oil Flow
Oil Separator
Pressure Regulator
Refrigerant Low Pressure Switch
Compressor
Pressure Equalizing Solenoid Valve
Adsorber
Safety Valve (2.84
-
3.24MPa)
Pressure Meter
Low Pressure Regulator
Supply Gas Thermostat
(120
°C)

8ULVAC CRYOGENICS INCORPORATED
3.2.3 Internal Components
Internal components are shown in Table 3-3, Figure 3-3 and 3-4.
Table 3-3 Components inside and their functions
No. Component Function
1 Compressor motor Helium compressor motor.
2 First heat exchanger Air-cooled heat exchanger for helium compressed gas.
3 Second heat exchanger Air-cooled heat exchanger for helium compressed gas.
4 Oil heat exchanger Air-cooled heat exchanger of lubricating oil.
5 Oil separator Separates oil from compressed helium gas.
6 Adsorber
Separates residual oil mist in the processed compressed
helium gas processed by oil separator.
7 Buffer tank Helium gas reserve tank.
8
Helium gas supply port
（SUPPLY）For connecting flexible hose （helium gas supply port）.
9
Helium gas return port
（RETURN）For connecting flexible hose （helium gas return port）.
10 Helium gas charge port Port to charge helium gas.
11 Oil replenish port Soldered port for charging lubricating oil.
12 Low pressure regulator
By-pass valve to maintain the pressure of the low-pressure
helium gas above a certain level.
13 High pressure regulator
By-pass valve to maintain the pressure of the high-pressure
helium gas above a certain level.
14 Safety valve
Safety pressure valve to maintain the pressure of the
high-pressure at a specified value or below.
15 Solenoid valve（SVC）Solenoid valve for helium gas pipes.
16 Pressure gauge
Indicates the helium gas charge pressure when not in
operation, and shows the compressed helium gas pressure
during operation.
17
Low-pressure pressure
switch
（
63PL
）
Pressure detector to detect a drop in suction gas pressure.
18 Filter Removes dirt and dust from the circulating lubricating oil.
19,
20
Capillary tube Adjusts the flow amount of the circulating lubricating oil.
21 Thermostat（26G）
Detection and control device for the temperature of the
compressed helium gas at the outlet of the compressor.
22 Fan Cools down the heat exchanger
23 Fan Motor
24 Control panel
Control monitor and warning system for the helium gas
compression unit.
(Refer to “3-3 Instructions on the Electrical System.”)

ULVAC CRYOGENICS INCORPORATED 9
Figure 3-3 SA115-C Internal Components
1
18
12
22
23
3
2
4
11
21
13
6
7
5
14
10
15

10 ULVAC CRYOGENICS INCORPORATED
Figure 3-4 SA115-C Internal Components
9
8
17
19 、 20
24
16

ULVAC CRYOGENICS INCORPORATED 11
3.3 Instructions for the Electrical System
3.3.1 Control Components
The control components for Compressor Unit SA115-C are shown in Table 3-4, Figure 3-5
and Figure 3-6.
Table 3-4 List of Control Components
No. Component Code Component number Specifications Volume
1 Operation Switch SW1 AJ911102B3F AC250V 16A 1
2 Elapsed Time Meter HM H7ET-NFV-300 DC3V 1
3 Refrigerator Connector CN1
JL04V
-2A18-10SE-B-R
4P 1
4 Remote Connector CN2 N/MS3102A14-7S 3P 1
5
REOMTE / LOCAL
Switch
SW2 S-1-Z AC250V 4A 1
6 Fuse F1, F2, F3 02163.15 AC250V 3.15A 3
Fuse Holder F-400-01-A2 AC250V 10A 3
7 Power Terminal Board TB1 KTU15（J）600V 15A 4P 1
8 Thermostat 26G CS-74L120 120°C 2
9 Low Pressure Switch 63PL ACB-1AU3 OFF:0. 098MPa 1
10 Reverse Phase Prevention Relay 47C QE-20N AC200V 1
11 Magnet Switch
Thermal Overload Relay 52CM SW-0/3QA AC200C
Setting: 9A 1
51CM 1
12 Delay Relay Socket
(With holding clamp) 2T1 ST7P-4
TP814X1 AC200V Setting: 1 second 1
13
Auxiliary Relay Socket
(With holding clamp)
4X1
HH54P
TP58X2
AC200V 1
14 Auxiliary Relay Socket
(With holding clamp) 4XAL HH52P AC200V 2
TP58X2 2
15 Terminal Board for Control TB2 KTUNS-8J-SA
1976 600V 10A 8P 1
16 Fan Motor Power Terminal TB3 KTUNS-6J 600V 10A 6P 1
17 Delay Relay Socket RY1,RY2 G2R-2-SN
P2RF-08 Coil AC200V 1
18 Signal connector CN5 DE-9P-NR 9P 1
WARNING
Disconnect all the power sources supplied to the compressor unit before opening the
panels.

12 ULVAC CRYOGENICS INCORPORATED
Figure 3-5 SA115-C Internal Components
３
４
7
５
６
１８
１
２

ULVAC CRYOGENICS INCORPORATED 13
Figure 3-6 SA115-C Internal Components
8
9
15
16
11
12
14
13
10
17

14 ULVAC CRYOGENICS INCORPORATED
3.3.2 Remote Connector
The remote connector can be used to remotely operate of the compressor unit.
Table 3-5 shows the detail of remote operation and monitor sequence.
Table 3-5 Remote/Monitor Sequence
No. Item Status Pin No. Contact Capacity
1 Remote
Operation
Stop Release A, B
Rated Volume: AC200V
above 0.1A
Minimum load: AC 200Ｖ0.01Ａ
Run Connect
Table 3-6 Applied connector for remote
Name
Specifications
Plug connectors
（
Straight type
）
Made by Japan Aviation Electronics Industry, Ltd. N/MS3106B-14S-7P
Plug connectors
（
Angle type
）
Made by Japan Aviation Electronics Industry, Ltd. N/MS3108B-14S-7P
Cable clamps
Made by Japan Aviation Electronics Industry, Ltd. N/MS3057-6A
Diagram 1.5 Remote connector pin configuration
Figure 3-7 Remote Connector Pins
3.3.3 Signal Connector
The signal connector can be used to monitor conditions.
Table 1.7 shows the monitor sequence of the compressor unit.
Table 3-7 Monitor sequence
No. Items Condition Pin code Volume of contact points
1 Operation monitor
No-voltage
contact
point
Operated Close
Stopped Open 1 , 2 DC 24V 0.1A
2 Warning monitor
No-voltage
contact
point
Normal Open
Warning Close 4 , 5 DC 24V 0.1A
Table 3-8 Applicable connector for remote
Name
Specifications
Plug connector
DE9S-NR Made by Japan Aviation Electronics Industry, Ltd.
Connector Shell
DE-C8-J9-B1-1R Made by Japan Aviation Electronics Industry, Ltd.
Signal connector pin configuration
Figure 3-8 Remote Connector Pins
C
B
A
This is the socket side insert, as seen from the pins at
front of connector.
8
1 52
97
3
6
4
This is the socket side insert,
viewed
from
the pins at front of connector.