Ulvac GN-30i User manual

D/N.MJCE002E, 2016.06 ULVAC CRYOGENICS INCORPORATED
Nitrogen Generator
Instruction Manual
GN-30i
Export Control Policy
When applying our 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.
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.

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. GN-30i Overview······················································································5
1.1 General································································································5
1.2 Features·······························································································5
1.3 Specifications ························································································6
2. Unpacking and Installation··········································································7
2.1 Unpacking and inspection········································································7
2.2 Cautions for Installation ···········································································7
2.3 Electric Wiring························································································7
3. Component Descriptions············································································9
3.1 External Dimensions and Component Description·········································9
3.2 Component Details··············································································· 10
4. System Diagram····················································································12
5. Operation·····························································································13
5.1 Preparation before Operation·································································· 13
5.2 Start-up and Stop (Local operation)·························································· 13
5.3 Start-up and Stop (Remote: Operation by input external signals)···················· 13
6. Operating Precautions·············································································14
6.1 Operating Precautions··········································································· 14
7. Troubleshooting·····················································································15
8. Maintenance ·························································································17
8.1 Daily Inspections and Maintenance·························································· 17
8.2 Total Inspection···················································································· 17
9. Warranty ······························································································18

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.
The nitrogen generator 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 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 turned ON.

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.
14.Use our genuine parts.
15.Do not remodel.
13.Repair work should be done by appropriate service
providers.

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ULVAC CRYOGENICS INCORPORATED 5
1. GN-30i Overview
1.1 General
The GN-10i generates high density nitrogen gas with PSA(*) technology. The system
consists of a compressor, adsorption tank, buffer tank, pressure regulator, flow rate
meter, flow rate control valve, solenoid valve, piping or control equipments.
(*)P.S.A.（Pressure Swing Adsorption）
P.S.A. is the technology to generate high density nitrogen by pressurizing or
depressurizing (expose to the atmosphere from pressurized state) compressed air using
the properties of adsorber (carbon molecular sieve) to adsorb and desorb oxygen.
1.2 Features
・Easy to conduct maintenance work as the panels on top or both sides can be
removed.
・Automatically switched between 50Hz and 60Hz.
・Operation starts simply by pressing Run/Stop button. Once started up, GN-30i
generates nitrogen gas automatically.
・To stop operation, simply press Run/Stop button.
・The compressor is long-life and low-noise type.
・Safety circuit is built inside to detect the compressor trouble. GN-30i stops
automatically when a trouble occurs in the compressor.
・Drained water is evaporated by electric heater and PSA exhaust desorbed gas.
There is no need of piping for drained water.

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1.3 Specifications
Table 1-1 Shows the specifications of GN-30i.
Table 1-1 GN-30i Specifications
Items Specifications
Model GN-30i
Purity (*1) 99 vol%
N2 production rate (*2) 30 NL/min
Discharge pressure 0.2 MPa
Dewpoint Below -60°C
Flow meter (*3) 50.0 NL/min
Electrical rating
Voltage and frequency Main power source 200VAC (single-phase) 50/60Hz
Power consumption 1200W
Operating method Input operation signals
Input and output
electrical signals
Input
Remote signal: CLOSE while in operation
Contact capacity:DC30V 20mA required
Output
Running signal: In operation (ON)
N2 supply signal: While supplying (ON)
Alarm signal: While in alarm state (ON)
Relay contact output: Continuous load current 100VAC
below 1A
Drained water
processing Evaporation inside the equipment
Nitrogen gas exit φ6 easy coupling
Ambient
temperature(*4) 5 - 40°C
Ambient humidity(*4) 10 - 80%RH
Dimensions 600(W) x 650(D) x 1,300(H) (excluding casters)
Weight Approx. 120Kg
Color DIC 546 1/2
Compressor 2688CS32-273 (made by Thomas) x 3
Noise level 60dB(A)
When measured from front 1m and height 1m
*1 Purity of N2(nitrogen) + Ar(argon).
*2 This is the volume measured at the ambient conditions of temperature 20°C and
humidity 60% RH and converted to 0°C and atmospheric pressure. The production
volume above is the maximum generation rate under the conditions of temperature 20°C
and humidity 60% RH and filters are cleared. The production rate decreases when
depending on the conditions such as temperature or humidity.
*3 Flow meter is made to fit the above discharge pressure. If it is used at the pressure
other than the above, conversion is needed.
*4 This is not to guarantee the performance under these conditions.

ULVAC CRYOGENICS INCORPORATED 7
2. Unpacking and Installation
2.1 Unpacking and inspection
Unpack the Carton and confirm that the carton contains the following items;
1) GN-30i
2) Instruction Manual (This book)
2.2 Cautions for Installation
Follow the precautions below when installing GN-30i.
1) This equipment is intended to be used indoors. Install it indoors where the
temperature is from 5 to 40°C.
(The compressor life will be deteriorated if the ambient temperature is above
30°C. If the equipment is used in low temperature, it might not function well.
2) The installation site must be free from waterdrops or high humidity.
3) Install the equipment away from direct sunlight.
4) Do not install in a dusty place.
5) Keep sufficient space in front of the air inlet or exhaust port.
6) Do not install the equipment in a place where closed or with inadequate
ventilation.
2.3 Electric Wiring
<Input>
Power source
Supply 200VAC, 15A outlet dedicated to the equipment.
When the equipment is operated by external signals
Remove the plate on the left, and make short-circuit connection between 1 and
2 of the terminal board (TB2) located on the lower left of the control panel with a
jumper connector. (The Run/Stop button on the operation panel will be invalid
when the 1 and 2 are short circuited.) Then, short-circuit 3 and 4 on the terminal
board (TB2) to start up the equipment by external signal.

8 ULVAC CRYOGENICS INCORPORATED
<Output>
Operation signal output 5,6 [RUN1, RUN2]
Output from when the operation starts.
Failure signal output 7,8 [AL1, AL2]
Output when the compressor is overloaded or motor wire is disconnected.
The siglnal is also output when the pressure of the tank is below the set value.
(The equipment will be brought to an emergency stop. Default set at 0.2MPa)
Nitrogen supply signal output 9,10 [RUN3, RUN4]
Nitrogen is discharged in about six minutes after the startup.
The nitrogen supply signal is output along with the discharge.

ULVAC CRYOGENICS INCORPORATED 9
3. Component Descriptions
3.1 External Dimensions and Component Description
①Operation panel ⑩Nitrogen gas flow meter
②Air inlet ⑪Pressure alarm light
③Handle ⑫Compressor alarm light
④Maintenance port ⑬Run/Stop button
⑤Ventilation fan ⑭Reset button
⑥Spare entrance port ⑮Pressure regulator (inside)
⑦Nitrogen gas discharge port ⑯Pressure sensor (inside)
⑧Cable entrance ⑰Circuit breaker (inside)
⑨Casters
Clear the spaces below for maintenance works.
Front: 600mm or more
Sides: 600mm or more
Back: 200mm or more
Unit: mm
Operation Panel
⑮
⑯
⑰

10 ULVAC CRYOGENICS INCORPORATED
3.2 Component Details
①Operation panel
②Air inlet
Port to intake the atmosphere.
③Handle
④Maintenance port
Make sure to turn off the power supply before opening the port. Use cautions to
conduct maintenance works.
⑤Ventilation fan
Do not block the air exit by placing the fan too close to walls or in other ways.
Take space of more than 200mm from walls.
⑥Spare entrance port
⑦Nitrogen gas discharge port (Rc1/4)
Exit port of nitrogen gas (produced gas)
⑧Cable entrances
Holes for power cables.
⑨Casters
Casters to move the equipment.
⑩Nitrogen gas flow meter
Displays the flow rate of nitrogen gas
⑪Pressure alarm light
Illuminates when the pressure of nitrogen tank is below the set value.
(Set value：0.2MPa)

ULVAC CRYOGENICS INCORPORATED 11
⑫Compressor alarm light
[Conditions that alarm light illuminates]
(1) When overcurrent by compressor overload is detected
(2) When compressor wiring is interrupted
⑬Run/Stop button and light
Press this button to startup or stop the equipment. The button illuminates while
running.
The light flashes when the compressor has been running for 8000 hours (Inspection
interval).
⑭Reset button
Resets equipments when the compressor trouble or abnormal pressure occur.
⑮Pressure regulator (inside)
Adjusts the discharge pressure of produced gas. Set the value within specified
range referring to the nitrogen discharge pressure gauge.
⑯Pressure sensor (inside)
Detects the tank pressure. This sensor triggers equipment emergency stop when the
pressure is below the setting while nitrogen is being discharged.
⑰Circuit breaker
Circuit breaker for the entire equipment.

12 ULVAC CRYOGENICS INCORPORATED
4. System Diagram
Symbol Item Symbol Item
AF1-3 Intake air filter PS1 Pressure sensor
DT1 Drain trap RV1 Relief valve
AT1,2 Adsorption tank MC1 Miniature valve
BT1 Buffer tank NV1 Flow rate control valve
CC1 Cooling tube SV1,2 Solenoid valve
CV1,2 Check valve SV3,4 Solenoid valve
FM1 Nitrogen gas flow meter SV5,5’ Solenoid valve
MC1 Miniature valve SV6 Solenoid valve
OR1 Orifice SV7 Solenoid valve
P1-3 Compressor V1 Solenoid valve
PG1,2 Pressure gauge VA1 Sound absorbing evaporator
PR1 Pressure regulator
Nitrogen gas exit
φ6 easy coupling
Spare port
Rc 1/4

ULVAC CRYOGENICS INCORPORATED 13
5. Operation
5.1 Preparation before Operation
1) Take the right side plate off, and remove the red screws (two per compressor unit)
that fix the compressor unit for transportation.
2) Connect the piping to the nitrogen gas discharge port (Rc1/4) on the back of the
equipment.
3) Wire the power cable, open the front door of the equipment and turn the circuit
breaker on.
4) Remove the jumper cable connectors inside the equipment, and press Run/Stop
button.
5) Open the door to check that the pressure meter of the pressure regulator (located
behind the operation panel) is set at specification value, and check the nitrogen gas
flow meter on the operation panel to confirm that the flow rate is approproate.
5.2 Start-up and Stop (Local operation)
1) Press Run/Stop button on the operation panel to start-up.
Press Run/Stop button again to stop.
<Note> The system will start with the conditions set at previous time.
5.3 Start-up and Stop (Remote: Operation by input external signals)
1) Remove the plate on the left side to connect jumper connector connected to 1 and
2 of the terminal board (TB2).
2) Short-circuit 3 and 4
(Refer to “2.3. Electrical Wiring”)
3) The system will be in operation when “making” (turned ON), and stops when “in
break”. (turned OFF).

14 ULVAC CRYOGENICS INCORPORATED
6. Operating Precautions
6.1 Operating Precautions
1) Power capacity
At the time of start-up, large volume of electric current flows for a short while. If the
capacity of power source is small, the operation might not proceed normally, such as
the alarm light illuminates and the system stops while starting-up, or the circuit
breaker inside is turned off. In such cases, use the power source with sufficient
capacity as the dedicated source for the equipment.
2) When opening the side panels
When you remove the side panels to conduct the inspection of the equipment, make
sure that the equipment is turned off before working.
If it is necessary to take the side panels off while in operation, use cautions never to
place hands or bodies close to the compressor or cooling fans.
3) Devices inside
Never attempt to make alternations or remove the pipings, couplings or electric
circuit as it may result in failure.
4) Power outage during operation
In case the power outage takes place while the equipment is in operation, the
equipment may stop and the supply of produced gas stops as well. After the power
recovers, the equipment will restart the operation automatically. However, if
pressure remain inside the adsorption chamber, the compressor does not rotate due
to the pressure under load, the safety circuit work and the operation stops along with
the attention light turned on.
In such a case, press the illuminating attention light to clear. The safety circuit is
canceled and the equipment will start operation again.