Cold Jet RE320 Manuel utilisateur
Recovery Unit RE320
USER MANUAL
Original Instructions [English] May 2023 Rev 1
RE320
User manual
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Copyright © 2023 Cold Jet, K
All rights reserved. Printed in the enmark.
UE TO CONTINUE PRO UCT EVELOPMENT THIS INFORMATION MAY CHANGE WITHOUT
NOTICE. THE INFORMATION AN INTELLECTUAL PROPERTY CONTAINE HEREIN IS
CONFI ENTIAL BETWEEN COL JET AN THE CLIENT AN REMAINS THE EXCLUSIVE PROPERTY
OF COL JET. IF YOU FIN ANY PROBLEMS IN THE OCUMENTATION, PLEASE REPORT THEM TO
US IN WRITING. COL JET OES NOT WARRANT THAT THIS OCUMENT IS ERROR-FREE.
NO PART OF THIS PUBLICATION MAY BE REPRO UCE , STORE IN A RETRIEVAL SYSTEM, OR
TRANSMITTE IN ANY FORM OR BY ANY MEANS, ELECTRONIC, MECHANICAL, PHOTOCOPYING,
RECOR ING OR OTHERWISE WITHOUT THE PRIOR WRITTEN PERMISSION OF COL JET.
THIS MANUAL REFLECTS THE PRO UCT CONFIGURATION AS WAS CURRENT AT THE TIME OF
ITS WRITING. AN ITEM’S ISPLAY IN THIS MANUAL OES NOT GUARANTEE THE ITEM’S
AVAILABILITY AT ANY TIME IN THE FUTURE. IMAGES SHOWN ARE FOR REPRESENTATION
PURPOSES ONLY. PRO UCTS MAY VARY FROM THE IMAGES ISPLAYE . COL JET IS NOT
LIABLE FOR TYPOGRAPHICAL ERRORS OR CHANGES TO SPECIFICATIONS PRESENTE .
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CONTENT
INTRODUCTION 4
SAFETY REGULATIONS 7
•
General Measures 7
•
Personnel Qualifications 7
•
Security and Risk 7
•
anger of Suffocation 8
•
Static Electricity 8
•
anger of Congelation 8
MACHINE STRUCTURE
MACHINE CONTROLS 13
•
Operation Panel 13
•
Liquid CO2 detector and reservoir 14
•
Main menu structure – RE320 UNI PLC 14
•
isplay Settings 15
AUTOMATION 16
•
Power supply and control protection system 16
•
Pressure protection system. 16
STARTING UP THE RECOVERY UNIT RE320 16
STOPPING THE RECOVERY UNIT RE320 UNI 17
•
Stopping without depressurizing the system. 17
•
epressurizing the system before stopping. 17
•
epressurizing the system if there is a power failure. 17
ALARM
MESSAGES 18
MAINTENANCE 20
•
Maintenance intervals 20
•
Oil filter 20
•
Inspection and refill of CO2 compressor oil 21
•
Refilling CO2 compressor oil. 22
•
rainage of CO2 compressor oil 23
•
CO2 Pressure and venting 24
•
Insufficient refrigeration 24
•
Refrigerant condensation high pressure 25
•
Refrigerant evaporation low pressure. 26
•
Insufficient heat transmission in the CO2 condenser. 26
•
Terms of Warranty 26
•
Cleaning and Storage 27
SPARE PARTS LIST 28
TROUBLESHOOTING 30
DELIVERY REPORT 32
CONTACT INFORMATION 33
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INTRODUCTION
This manual should be kept with the owner and be readily accessible for operation and maintenance. This manual contains
information for the safety, operation, and maintenance.
The graphics used in this manual may show machine details that may be different than the actual machine. Components
of the machine may have been removed for illustrative purposes or the continuing improvement of the machine’s design
may cause changes that are not included in this publication.
The owner of this machine is responsible for verifying the operator of this machine is properly trained and understands the
contents of this manual.
About the Machine
The recovery RE320 UNI is especially designed to be connected to multiple types/brands of pelletizers, and not only the
PE80 Pelletizer.
This technology is the subject of Patent application No. 0408224.4.
To obtain long and trouble-free operation of the equipment we recommend reading this manual carefully. All new operators
of the equipment should also familiarize themselves with the content of this document.
Normal dry ice production uses liquid CO2 which when brought to normal atmospheric pressure, in e.g. a pelletizer converts
to one half snow and one half gas, called ‘revert’ gas. The snow is then compressed into dry-ice pellets.
But, by using the RE320 UNI Recovery Unit, the revert gas, which is usually lost into atmosphere, is collected and recycled
to make more pellets. This becomes a continuous process and will, as a result, reduce production costs by up to 50%.
Supplier responsible for the equipment
Cold Jet ApS
Industrivej 68
K-6740 Bramming
enmark
Phone: +45 75 56 15 00
Fax: +45 75 56 15 09
Homepage: www.coldjet.com
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Technical Data
Voltage 440-480 V AC
Frequency 60 Hz
Power 45 kW
Current 85 A
imensions L2420 * W1370 * H1640 mm
Weight 2000 kg
Power connection 85A 3 P + N + E
Refrigerant R452A
Compressor Oil Type PAO68 oil (Food grade)
Food grade compressor oil type PAO68 oil (Food grade)
Min. to max. temperature +5°C (+41°F) - +35°C (95°F)
Properties of Carbon Dioxide
Name Carbon dioxide
Chemical Formula CO2 (molecular structure: O=C=O)
English Carbonic acid, dry ice
French ioxyde de carbon, anhydride carbonique
German Kohlendioxid, Kohlensäure, Trockeneis
Spanish Acido carbonico
Molecular Weight Mco2 = 44,011 kg/kmol
Molecular norm volume Vmn = 22,263 m3/kmol
Specific gas constant Rco2 = 0,1889 kj/(kg *K)
ensity of the gas (0 C and 101.3 kPa, air = 1) Qn = 1977 KG/m3
Relative density of the gas (0 C and 101.3 kPa, air = 1) = 1529
Critical temperature Tcrit = 31 C
Critical pressure Pcrit = 73,83 bar
Critical density Qcrit = 466 kg/m3
Sublimation point Ts = -78,9 ºC at 0,981 bar
Triple point -56,6 ºC at 5,18 bar.
Temperature of disintegration more than app. 200 ºC [disintegration ratio nearly 0.032 vol
%
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Pressure Temperature Diagram
This phase diagram shows the three phases for carbon dioxide versus pressure and temperature.
Solid Carbon Dioxide / Dry Ice
Sublimation temperature 78.9 ºC (149.25.K) at p = 0,9807 bar
Latent heat of sublimation (Enthalpy of sublimation) 573,02 kJ/kg
Total enthalpy, increasing temperature from -78.9 ºC to 0 ºC 645 kJ/kg
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SAFETY REGULATIONS
General Measures
The manual contains instructions for starting up, operating, and servicing the machine. The operator must follow all
instructions in this manual. The owner must make sure that the operator understands the contents of this manual and
follows its guidelines and safety regulations.
Personnel Qualifications
Employees, who are in charge of installation, operation, service, and maintenance must be adequately trained to install
and operate this machinery.
If the employees do not possess sufficient knowledge, they must be instructed and trained properly. If necessary, this
can be arranged in cooperation with the manufacturer of the machine.
The owner of the machine shall make sure that the operator, who is to work with the machine, fully understands the
importance of studying the contents of this manual and comply with the SAFETY REGULATIONS described on the
following pages as well as those placed on the machine.
Security and Risk
The machine is designed to comply with the EC eclaration of Conformity for Machinery. Therefore, using the machine
does not pose a risk to the operator when the instructions in this manual are followed.
It is important that the operator follows the safety signs posted on the machine and the safety regulations described in
this manual and that the operator reads and understands the contents of this manual before starting up the machine.
Installation must be carried out according to the instruction “Preinstallation RE80-160-320”.
The machine may only be installed by authorized personnel with knowledge of the Council irectives 73/23/EEC and the
89/336/EEC and the 89/336/EEC (or similar directives in other parts of the world).
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Danger of Suffocation
ry ice pellets are CO
2
in solid form. At ordinary atmospheric pressure, CO
2
can only exist in this solid form at
temperatures of -79°C (-110°F) or lower. Therefore, during dry ice production, the CO
2
will immediately be heated and
thus transform from solid form into gas form.
Please note:
Since the specific gravity of CO
2
is higher than that of ordinary atmospheric air, the air with its contents of oxygen will be
replaced by CO
2
if the dry ice production is taking place in small or insufficiently ventilated rooms.
Therefore, please note the following:
1. Low CO
2
concentrations (3-5%) may cause headaches and rapid breathing.
2. CO
2
concentrations of (7-10%) may cause headaches and nausea and may result in unconsciousness.
3. Higher CO
2
concentrations will result in unconsciousness and suffocation.
High CO
2
concentrations may result in unconsciousness due to the displacement of oxygen. Therefore, always provide
sufficient ventilation of the working area, and avoid producing dry ice in small rooms.
Static Electricity
ry ice can cause electrostatic discharges. However, the equipment is bonded to the ground to minimize electrostatic
discharge, and the warning sign is meant to instruct the operator to avoid placing the equipment in rooms containing
explosive gasses.
It is recommended to use a plastic shovel in the dry ice container.
Danger of Congelation
CO
2
in solid form has a temperature of -79°C
/-110°F or lower at atmospheric pressure and can therefore cause serious congelation injuries.
IMPORTANT!
The dry ice is extremely cold, therefore, do not touch parts of the machine, which are in direct contact with the dry ice
without wearing appropriate protective clothing and gloves.
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MACHINE STRUCTURE
1: Second stage CO2 compressor (item no. 22400004)
2: First stage CO2 Compressor(item no. 4C20290)
1. CO2 Gas cooler
2. Refrigerant condenser
3. Refrigerant accumulator
1
2
1
2
3
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Components for 3x400V; 50 Hz and 3x480;60 Hz
1. Breaker
2. Transformer
3. Contactor
4. Phase sequence protection relay
5. 24vdcc supply
6. PLC
7. Transformer & EKC 315a refrigerant regulator
8. Relays
. Main supply breaker
1 2
3 4 5
6 7
8
9
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