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Table of Contents
Summary of Contents for Cold Jet RE320
- Page 1 Recovery Unit RE320 USER MANUAL Original Instructions [English] May 2023 Rev 1...
- Page 2 CONFIDENTIAL BETWEEN COLD JET AND THE CLIENT AND REMAINS THE EXCLUSIVE PROPERTY OF COLD JET. IF YOU FIND ANY PROBLEMS IN THE DOCUMENTATION, PLEASE REPORT THEM TO US IN WRITING. COLD JET DOES NOT WARRANT THAT THIS DOCUMENT IS ERROR-FREE.
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Page 3: Table Of Contents
Danger of Congelation • MACHINE STRUCTURE MACHINE CONTROLS Operation Panel • Liquid CO2 detector and reservoir • Main menu structure – RE320 UNI PLC • Display Settings • AUTOMATION Power supply and control protection system • Pressure protection system. •... -
Page 4: Introduction
‘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. - Page 5 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 RE320 Version: Page: 5 of 21 User manual Date: 2023.05...
- Page 6 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 RE320 Version: Page: 6 of 21 User manual Date:...
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Page 7: Safety Regulations
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 Directives 73/23/EEC and the 89/336/EEC and the 89/336/EEC (or similar directives in other parts of the world). RE320 Version: Page:... -
Page 8: Danger Of Suffocation
/-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. RE320 Version: Page: 8 of 21... -
Page 9: Machine Structure
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 RE320 Version: Page: 9 of 21 User manual Date: 2023.05... - Page 10 Components for 3x400V; 50 Hz and 3x480;60 Hz Breaker Transformer Contactor Phase sequence protection relay 24vdcc supply Transformer & EKC 315a refrigerant regulator Relays 9. Main supply breaker RE320 Version: Page: 10 of 21 User manual Date: 2023.05...
- Page 11 2. 1/2” BSP Pressure equalization from pelletizer 3. 3/4” BSP Liquid CO2 to pelletizer 4. 1 ½” Pressure relief 5. 2” cam male CO2 revert gas from pelletizer 6. 2” cam male Buffer tank RE320 Version: Page: 11 of 21 User manual Date: 2023.05...
- Page 12 When choosing a location for the Recovery Unit RE320 UNI, the room must be dry, clean and well ventilated. • Make certain that the Recovery Unit RE320 UNI is placed on a horizontal plane with a maximum slope of 2°C •...
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Page 13: Machine Controls
MACHINE CONTROLS The operation panel at the front of the RE320 UNI includes the following functions. Operation Panel 1: Display 2: Manual start button 3: Manual stop button 4: Emergency stop button Pressure Gauge Panel 1: CO2 Gas high pressure - Pressure after 2nd stage compression... -
Page 14: Liquid Co2 Detector And Reservoir
CO2 is detected, and a red light shows. The green light indicates that the level detector is electrically supplied. Function: • Green light = Power on Red light = Liquid CO2 Main menu structure – RE320 UNI PLC Cooling pressures RE320 Version: Page: 14 of 21... -
Page 15: Display Settings
The display has got a screensaver installed. This screensaver can be locked as seen on the small symbol on above picture. If this happens then press in each of the 4 corners and it will unlock. Language, brightness and date and time can be adjusted in the setting menu. RE320 Version: Page:... -
Page 16: Automation
- At start up after more than 3 hours of stand still the power has to be turned on for min. 2 hours due • to the crankshaft heating in the Cooling unit of the RE320. Any attempt to start earlier will damage the compressor of the Cooling unit. -
Page 17: Stopping The Recovery Unit Re320 Uni
STOPPING THE RECOVERY UNIT RE320 UNI Stopping without depressurizing the system. The Recovery and pelletizer can be stopped at any time. It is not advisable to switch off the power or use the • emergency stop button without first emptying the Recovery of liquid CO2. -
Page 18: Alarm Messages
The 1st stage compressors temperature is above 130 degrees Centigrade. Wait until the unit gets colder Cooling compressor protection Check the settings and status on the motor protection relay in the electrical box. RE320 Version: Page: 18 of 21 User manual Date:... - Page 19 There is low pressure in the refrigerant line. Check the refrigerant level Manually reset the pressure switch Cooling compressor oil diff To low oil level in the compressor switch condensing unit Manually reset the pressure switch RE320 Version: Page: 19 of 21 User manual Date: 2023.05...
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Page 20: Maintenance
If necessary, disconnect the fitting around the lower part of the filter. Unscrew by hand the lower part of the filter. Take out the filter and replace with new. Filter system Unscrewing filter New filter RE320 Version: Page: 20 of 21 User manual Date: 2023.05... -
Page 21: Inspection And Refill Of Co2 Compressor Oil
When changing oil, it should always be the same type as supplied with the system by Cold Jet The Recovery Unit RE320 UNI has an Oil differential switch built in. If the oil pressure is too low in the CO2 compres- sors, the error message “Low Oil Pressure”... -
Page 22: Refilling Co2 Compressor Oil
The oil sight glasses must be filled up with oil on both CO2 compressors. Take care not to over fill. Factory filling: Stage 1 = 1,8 liters Stage 2 = 0,9 liters Both sight glasses must be between ½ to ¾ full during stand still. RE320 Version: Page: 22 of 21... -
Page 23: Drainage Of Co2 Compressor Oil
When inspecting check the sight glasses under the oil filters. Only small amounts of oil are accepted in the sight glasses. Only in the ones pointed out with the red dots. Open ball valve to empty filters RE320 Version: Page:... -
Page 24: Co2 Pressure And Venting
Manual vent off valve (service depressurizing) Main CO2 release Insufficient refrigeration Insufficient refrigeration can be identified by reading the two pressure gauges for the refrigeration. Contact your local refrigerant technician for work on cooling circuit. RE320 Version: Page: 24 of 21 User manual Date: 2023.05... -
Page 25: Refrigerant Condensation High Pressure
25°C, the reading on the pressure gauge should be approximately 35°C. If the refrigeration condenser is dirty or if hot air is blown or recirculated over the condenser, then the readings on the pressure gauge will rise and the cooling capacity will drop. RE320 Version: Page:... -
Page 26: Refrigerant Evaporation Low Pressure
Cold Jet technician or by the owner’s qualified personnel who has been trained by Cold Jet in the repair and maintenance of Cold Jet dry ice blasting and dry ice production machines and accessories. -
Page 27: Cleaning And Storage
>20C (68F) might cause condensation (dew) inside the electronics, which can cause damage to the equipment. If condensation is suspected, then place the equipment in a warm room (+15C to +22C) for 1 hour before use. RE320 Version:... -
Page 28: Spare Parts List
Filter insert type G11/25XP 35319356 Filter insert type G11/25A 36115055 PA068 oil 34439101 Solenoid valve ¼” 34639224 Safety relief valve 24,1bar 34422201 Valve head AKV 22302002 Solenoid coil 230V AC RE320 Version: Page: 28 of 21 User manual Date: 2023.05... - Page 29 Pressure transmitter 0 – 25 bar 21401002 Liquid CO2 level sensor 21101010 Solid state relay 60091606 Sensor PT 1000 34639219 Safety valve 1,5 bar 461307A0 V-belt XPA 1307 34439202 Solenoid valve EVR 10 LC02 RE320 Version: Page: 29 of 21 User manual Date: 2023.05...
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Page 30: Troubleshooting
Due to dirty condenser (cooling) coil fins Low Pressure Cooling error message Evaporation pressure below 0 bar Restart the RE320 UNI. If this does in display not work, please repeat 2-3 times. If the message still displays, please contact a cooling engineer... - Page 31 Refrigeration condensing pressure. Insufficient heat transfer in CO2 See how to fix poor heat transfer in condenser the CO2 condenser in chapter concerning maintenance. RE320 Version: Page: 31 of 21 User manual Date: 2023.05...
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Page 32: Delivery Report
Delivery report - to be completed by the owner I have received Operation and maintenance manual for Recovery RE320 UNI The equipment has been delivered to me in a satisfactory condition, and I fully understand that the warranty is for a period of 12 months after the date of delivery. -
Page 33: Contact Information
Fax: +45 7656 1509 +49 6551 9606-0 Fax: +49 6551 9606-26 Customer Service: +49 65519606-14 Poland - Cold Jet Sp. z o.o. Mexico - Cold Jet Latinoamérica S. de R.L. de C.V. Address: Address: ul. Łukowska 12 Calle Sinaloa, 901-3. Oborniki, Poland...
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