Ulvac MP-300K User manual

D/N. MJCE003E, 2019MH01 ULVAC CRYOGENICS INCORPORATED
Liquid Nitrogen Generator
Instruction Manual
MP-300K
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 Conventions
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. General Description of the System ···················································· 5
1.1 Liquid nitrogen generator (MP-300K)············································ 5
1.2 Helium gas compressor (UW701N) ·············································· 5
1.3 PSA (Pressure Swing Adsorption) system nitrogen gas generator
(GN-20i) ················································································· 5
2. Component Description··································································· 6
2.1 Front panel of MP-300K (Figure 2-1) ············································ 7
2.2 Operation panel of MP-300K (Figure 2-2) ······································ 7
2.3 Inside MP-300K front door (Figure 2-3) ········································10
2.4 MP-300K Electrical circuit (Figure 2-4)·········································10
2.5 MP-300K Top (Figure 2-5)·························································11
2.6 UW701N Front (Figure 2-6) ·······················································13
2.7 UW701N Status display (Figure 2-7)············································13
3. Flow Sheet ··················································································14
4. Specifications···············································································15
4.1 Liquid nitrogen generator ··························································15
4.2 PSA system nitrogen gas generator·············································15
5. Utilities ·······················································································16
5.1 Power source (for MP-300K)······················································16
5.2 Cooling water (for MP-300K)······················································16
5.3 Power supply for GN-20i···························································17
5.4 Nitrogen gas for MP-300K (for systems with N2gas supply) ·············18
6. Installation···················································································19
6.1 Conditions for installation place ··················································19
6.2 GN-20i Power-supply connection················································20
6.3 MP-300K utility connection ························································20
7. Electric Wiring··············································································23
7.1 MP-300K ···············································································23
7.2 MP-300K(PLC) ·······································································24

IV ULVAC CRYOGENICS INCORPORATED
8. Operation····················································································25
8.1 Checks prior to operation ··························································25
8.2 Operation preparation·······························································25
8.3 Shutdown ··············································································26
8.4 Corrective action in the event of an error······································27
8.5 Emergency off ········································································28
9. Manual Dispense of Liquid Nitrogen··················································29
9.1 Connecting liquid nitrogen supply port ·········································29
9.2 Dispense liquid nitrogen····························································29
9.3 Disconnecting Manual Dispense Flexible Hoses ····························30
10. Automatic Supply of Liquid Nitrogen ·················································31
10.1 Inspections before automatic transfer ··········································31
10.2 Automatic transfer ···································································31
10.3 Time limit of automatic transfer···················································31
11. Maintenance and Inspection····························································32
11.1 Daily inspection·······································································32
11.2 Maintenance/inspection intervals ················································32
12. Troubleshooting············································································34
13. Accessories·················································································38
14. Warranty·····················································································39

ULVAC CRYOGENICS INCORPORATED 1
Safety Instructions
To this unit, voltage that would cause electrocution or serious injuries is applied. It is
extremely dangerous to touch the live part inside the unit. 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 equipments such
as electrical shock.
Connect the earth wire to D type grounding.
Nitrogen gas itself is not toxic to human bodies but it reduces the oxygen
concentration in the atmosphere (the oxygen concentration of 18% or below is defined
as an oxygen-depleted state). Choose a well-ventilated and good-air-circulated
location to install the present unit, or install a ventilator with a capacity of at least 2000
m3/Hr airflow. In addition, do not stay together with a dewar containing liquid nitrogen
in a sealed space, such as an elevator or a car.
The volume of nitrogen gas is 700 times of liquid nitrogen. Confining atmospheric
pressure liquid nitrogen in an airtight space produces high-pressure gas as high as
700 Atm, possibly resulting in explosion. Use liquid nitrogen in the condition constantly
open to air.
1. Danger of electric shock:
Do not touch the live part.
2. Danger of oxygen deficiency:
Ventilate well.
3. Danger of explosion: Do not seal LN
2
.

2 ULVAC CRYOGENICS INCORPORATED
Liquid nitrogen provides temperature as low as -196°C. If liquid nitrogen is directly
handled, there may be dangers of frostbites, loss of sight, and others. Be sure to
wear protective clothes such as leather gloves, goggles, trousers without turnips, etc.
to handle liquid nitrogen. In addition, liquid nitrogen transport piping must be carefully
checked. In this unit, there is a part with danger of burns if it is touched directly.
When performing maintenance or repair work, etc. wait for at least 30 minutes after the
unit is shutdown.
In this system, high-pressure helium gas is filled. When disassembling or disposing
the system or parts, be sure to discharge gas (under regular maintenance, there is no
need to discharge gas). In addition, never attempt to install the system under the
atmosphere of hydrochloric acid, chlorine gas, or other corrosive gases.
5. Danger of Explosion:
Do not expose to corrosive gases.
4. Danger of burns or frostbites:
Never touch high temperature and
ultra-low temperature parts.

ULVAC CRYOGENICS INCORPORATED 3
Disposal Considerations
Regulations and the ordinance concerning industrial waste treatment are provided in the
country and region to discard. When disposing our products, please process abandonment
according to relevant regulations and ordinance, etc.
We provide Safety Data Sheet (called SDS) of our products upon your request.
If you have any questions, please contact our Service Engineering Division or the nearest
customer support center.
WARNING
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 the 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.
WARNING
When it seems that the cryopump and the refrigerator have been used to evacuate a
toxic or dangerous material, you must contact a safety supervisor before discarding,
and discard it after removing the poisonous material according to directions of the
safety supervisor.

4 ULVAC CRYOGENICS INCORPORATED
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