Ulvac GN-15i User manual

D/N. MJOM025E, 2018.08ULVAC CRYOGENICS INCORPORATED
Nitrogen Generator
Instruction Manual
GN-15i
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 product. This instruction manual provides information and
precautions on handling, installation, operation, and maintenance of the product.
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 as well.

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
1. General··································································································5
2. Features ································································································5
3. Component Descriptions············································································6
3.1 External Dimensions and Component Description·········································6
3.2 Component Details·················································································7
4. Flow Diagram··························································································9
5. Specifications ························································································10
5.1 Nitrogen generator specifications····························································· 10
6. Electric Wiring ·······················································································11
7. Unpacking and Installation········································································12
7.1 Unpacking and Checking Contents·························································· 12
7.2 Installation··························································································· 12
7.3 Electric Wiring······················································································ 13
8. Operation·····························································································14
8.1 Preparation before Operation·································································· 14
8.2 Start-up and Stop (Tank pressure operation)*optional··································· 14
9. Maintenance ·························································································16
9.1 Daily Inspections and Maintenance·························································· 16
9.2 Overall Inspections··············································································· 16
10. Cautions before Use ···············································································17
11. Troubleshooting·····················································································18
12. Warranty ······························································································20

IV ULVAC CRYOGENICS INCORPORATED
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ULVAC CRYOGENICS INCORPORATED 1
Safety Instructions
Following precautions contain information regarding the safety of handling this system.
Read them carefully to learn the ways of safe use.
It may result in explosion or fire if there is explosive, flammable gas organic solvent
close to the equipment. Place the equipment in a place free from flammable objects.
This equipment is not waterproof. If water invades into the electrical system, it may
result in electric shock or fire. This system must be installed indoors.
Make sure that the main power supply is turned off before starting inspections or
wiring. Failure to follow this procedure could cause electric shock or severe
injury.
Only qualified personnel can conduct electric wiring. If this caution is not
observed, it may result in electric shock or fire.
Make sure to ground the equipment. Failure to follow this procedure could cause
electric shock or fire.
Never attempt to compress gases other than the air. Otherwise, it may result in
explosion, fire or damage to the equipment.
2. Do not place outdoors.
1. Install the nitrogen generator in a safe place.
3. Disconnect power supply before conducting
inspections or servicing.
4. Electric wiring must be done by qualified
personnel.
5. Connect the ground wire.
6. Do not attempt to compress gas other than
the air.

2 ULVAC CRYOGENICS INCORPORATED
Inhaling nitrogen gas may bring serious damage to human bodies.
Do not use the nitrogen generator in a place where closed or without insufficient
ventilation as it may severely damage human bodies. Use the equipment in a
place where sufficient air flow is available.
Do not touch the compressor while it is supplied power. It may result in burn injury.
Follow the maintenance standard for inspections and maintenance. Make sure to
release tank pressure and confirm that there is no pressure before starting such
works. If pressure remains, it may blow off parts, resulting in body injury.
Operate the nitrogen generator in a place where the temperature is from 5 to 40°C.
The drain freezes when the ambient temperature is below 5°C, resulting in
equipment failure. When it is above 40°C, it could cause equipment failure or
shorten the life.
Installation site should be free from dirt or dust as they may cause equipment
failure.
8. Do not use the nitrogen generator in a closed
room.
11.Use the device at the specified temperature range.
12.Install the nitrogen generator in a clean place
10.Release the tank pressure before inspection or
maintenance.
7. Do not inhale nitrogen gas.
9. Do not touch the compressor while running.

ULVAC CRYOGENICS INCORPORATED 3
It may result in failure or deterioration of life if the repair work is done by personnel
who do not have adequate knowledge on the structure or risk.
When replacing parts for maintenance, our genuine parts should be used. Parts
that are not genuine could cause equipment failure or shorten the life.
Never attempt to remodel the equipment as it may result in breakage or decrease
of life.
Operation of this equipment must be done in a place where sufficient air flow is
available. It will have harmful effects to the performance of the device or human
bodies if it is operated in a place with poor ventilation.
14.Use our genuine parts.
15.Do not remodel.
13.Repair work should be done by appropriate
service providers.
16.Do not use in a place without sufficient
ventilation.

4 ULVAC CRYOGENICS INCORPORATED
Disposal Considerations
Disposal of industrial waste is regulated by national or local governments. Follow all
applicable local or national laws, regulations or guidelines when disposing of our products.
We provide Safety Data Sheet (SDS) of our products upon your request. Please contact
us when necessary.
WARNING
When the refrigerator unit may have pumped toxic or dangerous gases, you must
contact your safety supervisor at the time of disposal, and follow the instructions to
remove hazardous substances before disposing.