Ulvac EMP-14W User manual

D/N. MJCE004E, 2019.01 ULVAC CRYOGENICS INCORPORATED
Liquid Nitrogen Generator
Instruction Manual
EMP-14W
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 gives 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 dependable operation when
properly used. Following safety precautions must be observed during normal operation and
when servicing them.
WARNING
A warning describes safety hazards or unsafe practices
which could result in severe injury or loss of life.
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.
CAUTION
A caution describes safety hazards or unsafe practices
which could result in personal injury or equipment
damage.
Low-temperature area present.
There is a risk of frostbite. Do not touch.

ULVAC CRYOGENICS INCORPORATED III
Table of Contents
Safety Instructions ··················································································· 1
Disposal Considerations············································································· 3
1. General Description of the System ····················································· 5
1.1 Liquid nitrogen generator (EMP-14W) ············································· 5
1.2 Helium gas compressor (model:SW115) ············································ 5
1.3 PSA (Pressure Swing Adsorption) Nitrogen Generator ······················ 5
1.4 Membrane Nitrogen Generator (type IM-120) ··································· 5
2. Component Description ···································································· 6
2.1 Front view of EMP-14W (Figure 2-1) ··············································· 7
2.2 Operation panel of EMP-14W (Figure 2-2)········································ 7
2.3 Inside view of EMP-14W front door and lower panel ························ 10
2.4 Inside the lower back panel of EMP-14W ······································· 10
2.5 EMP-14W Electric Circuit (Figure 2-4) ···········································11
2.6 Top of the EMP-14W (Figure 2-5) ···················································11
3. Flow Diagram ················································································12
4. Specifications·················································································13
4.1 Liquid nitrogen generator ···························································· 13
4.2 PSA (Pressure Swing Adsorption) nitrogen gas generator ················· 13
4.3 Membrane nitrogen gas generator ················································· 13
5. Utilities ························································································14
5.1 Power source (for EMP-14W) ························································ 14
5.2 Power source for GN-10i (when using GN-10i) ································ 14
5.3 Dry air for IM-120 (when using IM-120)········································· 14
6. Installation ···················································································15
6.1 Conditions for installation place···················································· 15
6.2 Connection of GN-10i to power source············································ 16
6.3 Dry air connection of IM-120 ························································ 16
6.4 Utility connection of EMP-14W ····················································· 16

IV ULVAC CRYOGENICS INCORPORATED
7. Electric Wiring···············································································19
8. Operation······················································································21
8.1 Checks prior to operation ····························································· 21
8.2 Preparation for operation ····························································· 21
8.3 Shutdown··················································································· 22
8.4 When suspending for long time (for 1 to 2 weeks) and
resuming EMP-14W····································································· 22
8.5 Corrective action in the event of an error ······································· 23
9. Dispense Liquid Nitrogen Manually ··················································25
9.1 Connecting liquid nitrogen supply flexible hose······························· 25
9.2 Supply of liquid nitrogen ······························································ 25
9.3 Disconnection of the flexible hose ·················································· 26
10. Automatic Transfer of Liquid Nitrogen ··············································27
10.1 Inspections before starting automatic transfer ································ 27
10.2 Automatic transfer ······································································ 27
10.3 Time limit of automatic transfer ··················································· 27
11. eco Mode ·······················································································28
11.1 eco mode ···················································································· 28
12. Maintenance and Inspection ····························································29
12.1 Daily inspection ·········································································· 29
12.2 Periodical maintenance/inspection················································· 29
12.3 Regular customer inspection························································· 30
13. Troubleshooting ·············································································31
14. Accessories ····················································································35
15. Warranty ······················································································36

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 level 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 EMP-14W, and install a ventilator with a capacity of at least 1000 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
700Atm, 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, frostbites, loss of sight, and others are foreseen. Always wear leather
gloves, goggles, trousers without turnips, etc. to handle liquid nitrogen. In addition, use
cautions to liquid nitrogen transport lines, too. In this unit, there is a part with danger
of burns if it is touched directly.
In this unit, high-pressure Helium gas is filled. To disassemble or dispose of the unit,
parts, and others, be sure to discharge gas (under regular maintenance, there is no
need to discharge gas). In addition, never attempt to install the apparatus under the
atmosphere of hydrochloric acid-based, chlorine gas-based, and other corrosive
gases.
5. Danger of Explosion: DON’T expose to corrosive
gases.
4. Danger of burns or frostbites: Never touch
high and ultra-low temperature area.

ULVAC CRYOGENICS INCORPORATED 3
Disposal Considerations
Disposal of our products must be done in accordance with applicable national and local
laws and regulations.
We provide Safety Data Sheet (SDS) of our products upon your request.
Please contact us if necessary.
WARNING
The cryocooler may contain residue of hazardous substances r
esulting from actual use.
Contact your safety supervisor and follow the instructions to remove such toxic
substances before disposing.

4 ULVAC CRYOGENICS INCORPORATED
This page intentionally left blank.