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THERMO-TEC NRCD Manual

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BEDIENHANDBUCH
Rackkühler
NRCD

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Summary of Contents for THERMO-TEC NRCD

  • Page 1 BEDIENHANDBUCH Rackkühler NRCD...
  • Page 2 Dear Customer, Thanking you for choosing our products, we are pleased to provide you this manual for the correct use of equipment. Please read carefully the recommendations mentioned in the following pages and instruct your techni- cians and dedicated personnel who will deal with the management and maintenance of the unit. Our company will remain at your complete disposal for any questions e/o clarification you should need during the commissioning phases or its life cycle.
  • Page 3 Each unit has an identification plate that is located on its frame and inside the electrical control panel, which shows all the data necessary for the installation, main- tenance and traceability of the machine. THE LABEL SHOWS THE FOLLOWING DATA: Modello - Model Ū...
  • Page 4 GENERAL CAUTIONARY NOTES ATTENTION The operating rules contained in this manual are an integral part • The installer must provide adequate documentation that must of the unit supply and are valid exclusively for the units covered by comply with EN 378-3 if applicable in the country of installation; this manual.
  • Page 5 | USER MANUAL NRCD TABLE OF CONTENTS SERIES � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � p. 6 EVACUATION AND CHARGING �...
  • Page 6 All this problems are very rare, but with NRCD units it is pos- Ū Wait approximately 30 minutes after switching off the sible to solve them.
  • Page 7 2014/68/EU. The NRCD units are pre-charged with nitrogen. Compressors On NRCD units only primary brand Scroll compressors are installed. Scroll compressor represent for CCAC units the best solu- tion in terms of efficiency and reliability.
  • Page 8 | HF61G00115P NRCD 1.2.2.1 Cooling circuits » Basic refrigeration circuit LONG DISTANCE KIT OPTIONAL SUPPLY LIMIT 10 Liquid receiver Compressor 11 Condenser High pressure switch 12 Safety valve Pressure probe 13 Check valve Ball valve Dehydrating filter 14 Solenoid valve (included from model 0200)
  • Page 9 NRCD 1.3 Models and versions NRCD 0450 The NRCD units are direct expansion units equipped with Scroll compressors with BLDC inverter motor and EC elec- tronically commutated radial fans. The naming methods and the unit configuration options are shown below.
  • Page 10 | HF61G00115P NRCD » NRCD0200_0300 Expansion valve Removable control panel Evaporator Inverter Liquid separator 10 Liquid receiver Compressor Air filter 11 Solenoid valve Dehydrating filter » NRCD0340 Solenoid valve Removable control panel Expansion valve 10 Liquid receiver Inverter 11 Evaporator...
  • Page 11 | USER MANUAL NRCD » NRCD0260_0400_0450 Dehydrating filter Electric control board Expansion valve Inverter Evaporator Compressor Solenoid valve Air filter The images shown are for illustrative purposes only. For the correct positioning of the components and accessories, re- fer to the dimensional drawing attached to the unit.
  • Page 12 | HF61G00115P NRCD SAFETY PRESCRIPTIONS The following are some general rules useful for ensuring the safety of people who are in contact with the unit. ATTENTION It is up to the installer and the owner of the installation site to define the safety and protection devices to be used for...
  • Page 13 | USER MANUAL NRCD actual work, it would be too late: any not recommended Ū Operators should avoid operating the device from unsafe, or wrong operation could then cause serious damage to uncomfortable positions that may affect their balance. people or property.
  • Page 14 | HF61G00115P NRCD » Residual risk areas Danger of fire Impact and abrasion hazard in fan area Danger of explosion due to the presence of pressurised circuits Danger of pollution due to the presence of refrigerant in the circuit Danger of cutting injuries near finned exchangers...
  • Page 15 | USER MANUAL NRCD 2.3 Location of safety data plates » Safety symbols A. Warning: danger due to poor familiarity with all the functions of the unit and the resulting risks. B. Read the use and maintenance manual carefully before operating the unit.
  • Page 16 | HF61G00115P NRCD 2.4 Maintenance precautions 2.4.6 Care and maintenance The cause of damages and accidents is often attributable to wrong maintenance, such as: Ū no water in the circuit; 2.4.1 Tools Ū incorrect percentage of anti-freezing agent in the hydrau- lic circuit;...
  • Page 17 Upon receiving the unit, check its integrity: the machine has The NRCD air-conditioning unit is suitable for all environ- left the factory in perfect condition; any damage must be im- ments except aggressive ones. Do not place any obstacles...
  • Page 18 | HF61G00115P NRCD Model [mm] NRCD 1000 To ensure correct installation, follow the instructions below: Ū Apply a anti-vibration rubber lining between the unit and the bottom; For installation of the accessories supplied with the “base module”, a seal should be applied between the unit and the accessory to ensure tightness.
  • Page 19 | USER MANUAL NRCD PLUMBING AND ELECTRICAL CONNECTIONS 4.1 Hydraulic connections » Pipe belling 4.1.1 Properties of the feed water (only dual cooling version) The quality and chemical composition of the cooling and heat transfer substance has a great influence on the life of the system, on the heat transfer and therefore on the perfor- mance of the air conditioning unit.
  • Page 20 | HF61G00115P NRCD The power connection for single-phase loads is to be made with a three-pole cable and “N” wire at the centre of the star [optional: power supply w/o neutral]. ATTENTION The cable section and line protections must accordant with what is indicated in the wiring diagram (attaced to the unit’s...
  • Page 21 To ensure the correct operation of the heating elements, check that the lower part of the compressors is hot and in The units NRCD must be used within the operating limits de- any case, that it is at a temperature 10 - 15°C higher than fined in this manual.
  • Page 22 WARNING In any case, please also refer to the document “First start up ATTENTION instructions”, supplied with the unit. The NRCD units are pre-charged with nitrogen. 5.4 Inspections during 5.6 Group stop operation The group is stopped by pressing the “OFF” key on the front...
  • Page 23 | USER MANUAL NRCD expected prolonged idle times (e.g. seasonal stops). The mains switch must be used to cut the unit off from the pow- er supply when there is no current flow, i.e. when the unit is in the OFF state.
  • Page 24 ATTENTION increases but less soluble as the temperature increases. The NRCD units are pre-charged with nitrogen. Vacuum cycle After the connection of the refrigerator line with the indoor unit with the outdoor unit, proceed with the vacuum cycle making sure to keep the connections of the indoor unit open (preloaded with nitrogen).
  • Page 25 | USER MANUAL NRCD » Charles’ law • Pc: Pressure • % ref: Percentage of refrigerant dissolved in oil • To: Oil temperature If the oil in the sump is held at a constant pressure, an in- crease in temperature will significantly reduce the amount of refrigerant dissolved in it, thus ensuring that the lubricating function desired is maintained.
  • Page 26 | HF61G00115P NRCD HUMIDIFIER L’installazione di un umidificatore richiede l’allacciamento al- le tubazioni d’alimentazione e di drenaggio dell’acqua. Shut-Off valve Filter Siphon Water supply Water drainage min 5° To simplify installation, it is recommended to use flexible Ū minimum slope of the drainage pipe greater than or pipes with an internal diameter of 6 mm and an external di- equal to 5°;...
  • Page 27 | USER MANUAL NRCD » Limit values for medium-high conductivity feed water of a humidifier with immersed electrodes. Symbol Unit Hydrogen ion activity Specific conductivity at 20°C σ μS/cm R, 20°C Total dissolved solids mg/l Fixed residue at 180°C mg/l...
  • Page 28 8.2.4 Expansion valve 8.2.1 High pressure switch On all units NRCD the electronically controlled expansion The high pressure switch stops the compressor when the valve is fitted as part of the standard equipment. This device, delivery pressure exceedsthe set value.
  • Page 29 | USER MANUAL NRCD can make the operation of the refrigeration circuit highly If, on the other hand, there is an electronic expansion valve, effective, which has as a final effect that of decreasing the in case of a compressor switch on or off request: power absorbed by the system.
  • Page 30 | HF61G00115P NRCD » Control and safety devices settings Start up Control device Differential Re-activation Maximum pressure switch cat. Bar-g 45,0 Manual Minimum pressure switch Bar-g Automatic Modulating condensation control (DX version) Bar-g 22,0 10,0 Time lapse between two starts of the same compressor...
  • Page 31 | USER MANUAL NRCD MAINTENANCE 9.1 Warnings ATTENTION When the motor runs independently due to air flowing through or if it continues to run down after being turned off, dangerous voltages of over 50V can arise on the motor inter- nal connections through operation of the generator.
  • Page 32 | HF61G00115P NRCD 9.2 Main features checks as described below. The indications below are relat- ed to standard tear and wear. To guarantee a constantly satisfactory performance over time, it is advisable to carry out routine maintenance and ACTION MAINTENANCE FREQUENCY...
  • Page 33 | USER MANUAL NRCD ACTION MAINTENANCE FREQUENCY 1 month 3 months 6 months 1 year Measure the pressures and working temper- atures (to be performed by a refrigeration technician). Check the energy consumption, measure the heat temperature and check for unusual noise during operation.
  • Page 34 | HF61G00115P NRCD 9.4 Air filters inspection » NRCD0100_0200_0300_0340 Open the rear door to access the air filters Take out the upper filter and then the lower filter. Replace if neces- Remove the filters supports sary » NRCD00260_400_0450 Open the rear panel to access the filter section...
  • Page 35 | USER MANUAL NRCD 9.5 Fans inspection » Inspection of fans Connettori elettrici dei ventilatori Open the front panel Remove the support grid Remove the fans’ electrical connectors 9.6 Set the right fan speed » Fan speed The adopted fans are of the backward curved blades type in combination with a 4 poles e-motor.
  • Page 36 | HF61G00115P NRCD With the BASIC control the control tension is set with a man- 9.7.2 High vacuum and refrigeration circuit ual potential installed in the E-Panel. drying To know the tension set with the potential it is necessary to To obtain high vacuum in the refrigerant circuit, it is neces- use an external tool (Voltmeter).
  • Page 37 | USER MANUAL NRCD TROUBLESHOOTING For troubleshooting purposes, please refer to the list and DANGER to the complete description of the alarms related to the in- As far as possible remedies are concerned, it is first of stalled software version.
  • Page 38 | HF61G00115P NRCD RETIRING THE UNIT When the unit has reached the end of its working life and The product is not potentially dangerous for human health needs to removed and replaced, a series of operations and the environment, as it does not contain any harmful sub-...
  • Page 39 | USER MANUAL NRCD 11.3 Packaging disposal The QR Code below is shown on a label on the packaging of the machine, which allows the user to identify the nature of the packaging used in order to follow the correct disposal procedure.
  • Page 40 | HF61G00115P NRCD REFRIGERANT FLUID SAFETY SHEET For refrigerant fluid safety data sheet, please refer to the documents supplied with the unit.
  • Page 43 Konformitätserklärung Dieses Produkt trägt das CE-Kennzeichen. Dieses Produkt wurde in Übereinstimmung folgender Richtlinien und Normen gefertigt: • Maschinenrichtlinie 2006/42/EG • Sicherheit von Maschinen-Mindestabstände zur Vermeidung des Quetschens von Körperteilen EN 349-04 • Sicherheit von Maschinen - Sicherheitsabstände gegen das Erreichen von Gefährdungsbereichen mit den oberen und unteren Gliedmaßen EN ISO 13857 •...
  • Page 44 Sternstraße 9 – 11 Zum Alten Dessauer 13 09306 Rochlitz 01723 Kesselsdorf Telefon (0 37 37) 44 96 - 0 Telefon (03 52 04) 39 09 - 0 E-Mail info@thermo-tec.de E-Mail dresden@thermo-tec.de Büro Berlin Büro Weimar Prenzlauer Straße 68 Erfurter Straße 50...