INSTALLATION GUIDE. Condensing unit for refrigeration plant. RCWC10D/22 380V 50/60Hz Seawater. Model. Installation manual RCWC10D/22 IM- RCWC10D/22 1

Transcription

1 INSTALLATION GUIDE Condensing unit for refrigeration plant. Model RCWC10D/22 380V 50/60Hz Seawater Installation manual RCWC10D/22 IM- RCWC10D/22 1

2 Contents Hazards and safety precautions General information Mechanical installation Hydraulic installation Electrical connections Appendix Appendix 1 - Electrical connections Appendix 2 Instructions for DP/W-01 Installation manual RCWC10D/22 IM- RCWC10D/22 2

3 Hazards and safety precautions Notice: Using warnings and precautions in this guide. Read carefully!!! Conventions used throughout the manual: The DANGER sign recalls your attention to procedures and practices that, if not strictly followed, could potentially lead to serious injury, or damage to equipment and property, The WARNING sign precedes those procedures and practices that, if not strictly followed, may result in serious damage to appliances. Notes with important content. Installation manual RCWC10D/22 IM- RCWC10D/22 3

4 General information About this guide This guide describes the proper method to install the RCWC10D/22 380V 50Hz 60Hz. See the unit part list in fig.4 and 5. This module is equipped with a control panel for managing the compressors, the cooling fluid pumps, chamber temperature, evaporator fans, and defrosts mode activation. This guide is intended for careful reading. Only this way, proper functioning of the unit can be guaranteed. This guide, with all its contents and documentation accompanying it, are and remain the intellectual property of the Constructor, all rights reserved. This guide may not be copied, in whole or in part, without the Constructors express consent..1 Installation manual RCWC10D/22 IM- RCWC10D/22 4

5 Identification label On delivery, compare the data on the identification label with the order document. A sample identification label is shown on Fig.1 The label describes the following information: Model Serial Number Supply Freon Type Freon quantity Oil type weight TRANSPORT, LIFTING AND POSITIONING The refrigeration plant is delivered assembled and loaded with pressured nitrogen. Transportation, storage and mounting of the refrigerant plant operations should be carried out according to the requirements of this guide. Packaging materials should not be disposed of in the environment or burned. Sharp edges and coil surfaces are a potential hazard. Avoid contact with them. Transportation Be careful to avoid rough handling the unit. Pulling and pushing the unit must be executed only from the base. Perform the transportation as shown on Fig.2 Installation manual RCWC10D/22 IM- RCWC10D/22 5

6 Lifting Lifting should necessarily be carried out on four points as shown on Fig.3. Be sure to check the permitted weight of the suspension and lifting equipment. Storage If the device has to be stored prior to installation, consider the following precautions to prevent damage, corrosion and wear: Label every element of the machine that is under pressure. Do not store the machine in a room where the temperature exceeds 50, and avoid exposure to direct sun light if possible. It is recommended to store the unit in a room with minimal activity and traffic, in order prevent the risk of accidental damage. Do not use steam jet for cleaning the unit..3 Installation manual RCWC10D/22 IM- RCWC10D/22 6

7 Unit description RCWC10D/22 is a condensing refrigeration unit for marine applications with sea water cooled condenser and evaporators with forced ventilation. The unit is capable of supplying up to fourrefrigeration chambers: 2 Freezers -18 up to 20 m 3 ; 2 Fridges (0 ) up to 50 m 3, With a total cooling capacity of 10 kw at -25 evaporation temperature. The unit is intended for cooling cold storage spaces (Freezers, and fridges) and it may not be appropriate for applications other than those described in this guide. This guide includes all the necessary information for proper installation of the equipment. Careful reading of this guide is advised before installation or any other operation. Qualified personnel should carry out the Installation and maintenance of the condensing unit. The manufacturer holds no responsibility for damage to property or human injury caused by incorrect mounting or starting up, and/or misuse of the unit and/or noncompliance with the specified instructions included in this guide. The unit is fully assembled, equipped, hermetically inspected, vacuumed, dried, oil charged,wired and electrically bound with tested controls. Fig.4 and Fig.5 display the unit with its components. Water inlets and outlets are sealed before transportation. The compressors are factory oil charged with 2.5 liters BSE-32, and the oil separators with 350ml BSE-32. The unit is loaded with pressurized dry nitrogen 7.2 bars at 20. Installation manual RCWC10D/22 IM- RCWC10D/22 7

8 Fig.4 RCWC Components. (Front view) Control board Filter - dryer Piston compressor Manometers Pressure switches Oil separator Shell and tube condenser.5 RCWC Components. (Back view) Main power switch Freon distribution board Receiver Module label Water regulation valves Installation manual RCWC10D/22 IM- RCWC10D/22 8

9 Technical specifications Power suply specification Condensing unit for refrigeration plant Parameters Units Values Type 3phase 400VAC 50Hz Max. power input kw 11.6 Max. Curent A 20 Casing Colour Spectacular dark green Material Painted Steel Height mm 1875 Dimension Width mm 1000 Depth mm 800 Weight kg 390 Quantity 2 Semi-Hermetic Type Reciprocating Compressors Compressor Model Bitzer 4CC Suply 3phase 400VAC 50Hz Oil Polyol ester BSE 32 Quantity 2 Type Shell and Tube Model Bitzer K283HB Condenser Cooling media Sea water Nominal water flow m 3 /h 3,8 Pressure drop kpa 52 Type R-404 A Charge 20kg Control Expansion Valve Refrigerant Nr. Of Circuits 4 Defrosting metod Electric heaters Installation manual RCWC10D/22 IM- RCWC10D/22 9

10 Dimmensions Conversions Imperial Coefficient Metric psi 6.89 kpa psi Bar psi kg/cm² degrees F (F-32) 5/9 Degrees pound-ft 1.36 Nm pound-ft kg-m pound-ft kn-m gpm (US) L/s gpm (US) m³/sec gpm (US) cm³/sec in-h²o kpa in-h²o psi in-h²o in-hg inches 25.4 mm inches 2.54 cm feet meters feet² meters² Microns mm Hg Security settings Pressure switch LP 0.7bar diff 1bar HP 24bar diff 7 bar Diff. Pressure sensor 45 Pa Fluids Refrigeration fluid Seawater Freon R404A Compressor oil BSE 32 Installation manual RCWC10D/22 IM- RCWC10D/22 10

11 Safety These units must be installed in conformity with the provisions of Machinery Directive 98/37/ C, Low Voltage Directive 73/23/EC, Pressure Vessels Directive 97/23/ C, Electromagnetic Interference directive 89/336/EC, and other applicable regulations in the country of installation. If these provisions are not complied with, then the unit should not be operated. The unit s electrical switchboard must be serviced and checked for wires with damaged insulation and/or loose connections. Failure to comply with the safety measures mentioned above may result in electrocution and fire hazard due to the presence of poor contacts or short circuits. Heat exchangers, compressors and refrigeration lines, contain pressurized cooling agents in gas and liquid state. Releasing these refrigerants is potentially risky as it may lead to human injury. The refrigeration plant includes components that are not designed to operate with natural cooling agents, such as hydrocarbon. The manufacturing company cannot be held liable for any problems, deriving from replacement of the original cooling agent or introduction of hydrocarbon. The used cooling agent R404A is included in group II (nonhazardous fluids). The maximum working pressure values are indicated on the labels of individual components, that make up the unit. Suitable safety devices (e.g., Pressure switches, safety valves) have been provided, to protect the machine and the space surrounding it in case of improper use. The user is obliged to ensure that the machine is fit for the condition of intended use, and that both installation and maintenance, is carried out by experienced personnel, that are able to comply with the provided recommendations provided in this guide. It is important that the unit is adequately supported, as detailed in this guide. Noncompliance with these recommendations may constitute hazardous situations for the personnel. The unit and its pipelines, has not been designed to withstand loads, caused by nearby units and structures. Every external load or stress transmitted to the unit may cause damage to the unit structure, as well as serious danger to people. In these cases, any form of warranty will automatically become void. Installation manual RCWC10D/22 IM- RCWC10D/22 11

12 Emergency stop / Normal stop. In emergency situations the machine can be turned off from the main switch, that is mounted on the left side of the switch board (rotate counter clockwise) For normal shutdown use the corresponding switches and buttons. For more detailed instructions follow the procedures in this guide. Access to the unit. The refrigeration machine must be placed in an area, accessible by operators and engineers; otherwise, a fence at not less than two meters from the outer surface of the unit should surround the place. DO NOT: Allow access and exploitation of the machine by unauthorized personnel. Warranty This device is delivered loaded with nitrogen, tested and ready for installation and operation. Any form of warranty becomes void, in case the machine is modified without the preliminary authorization from the Constructor. This warranty will apply providing that the installation and operation instructions have been complied with. In order for the warranty to be valid, the following conditions shall be met: The machine must be operated only from authorized personnel. Maintenance and Service must be provided only by qualified personnel. Use only spare parts mentioned in the documentation. All planned maintenance and technical service of equipment must be carried out on time and in a proper way. Failure to comply with any of the conditions mention above will automatically void the warranty. For safety reasons it is essential that instructions, provided in this guide are followed. In case of any damage, caused by non- Installation manual RCWC10D/22 IM- RCWC10D/22 12

13 compliance with the instructions, the warranty becomes automatically void. This guide, with all its contents and documentation accompanying it, are and remain the intellectual property of Constructor, all rights reserved. This guide may not be copied, in whole or in part, without the Constructors written consent. Safety measures Upon unit installation follow the safety measures listed below: Do not wear loose clothing, jewelry and other accessories that can fall into moving parts. Make sure to wear the appropriate personal safety gear (Gloves, protective goggles, etc.) when you have to work in the presence of free flames (welding operations) or with compressed air. Necessarily wear a protective helmet when operating the machine.. If the unit is place in a closed room, wear ear protection devices. When you have to disassemble a pipe from the system, it is necessary to close the corresponding shutoff valve, and wait until the pressure is balanced to the atmospheric value. Only then, proceed with repairing the damaged or malfunctioned parts. Do not use your hands to check for pressure drops. Use tools that are in good condition, make Shure you ve read and understood the instructions before using them. Be sure to have removed all tools, cables and any other objects before starting the unit. Be sure to have perfectly understood the instructions of this guide before carrying out any operations on the control panel. When working with the control panel, always keep the instructions guide within reach. Connect the appliance to the power grid in accordance to the instructions described in this manual. Before starting up the unit, make sure the machine is properly grounded. Inspect all electrical connections, cables and, more specifically, cable insulation. Replace any worn out or damaged wiring. Routinely check the internal wiring of the control panel. Make sure, that the refrigeration plants connections comply with the instructions provided in the guide and annexes. Keep a fire extinguisher for electrical appliance near the machine. Clean any flammable liquids and substances from the machine and its surroundings. Do not disperse the refrigerants and oil into the environment. Do not bend or hit pipes containing fluids under pressure. Installation manual RCWC10D/22 IM- RCWC10D/22 13

14 Safety labels The machine is electrified. The unit can be fully turned off from the master switch (located on the left side of the control board). If any procedures need to be performed while the unit is operational, take precautions for working with electricity, Label warning for possible dangers. Read the documentation accompanying the electrical control board carefully before opening its doors. Indicative labels. Installation manual RCWC10D/22 IM- RCWC10D/22 14

15 Mechanical installation Condensing unit for refrigeration plant. This unit is designed for indoors installation over solid surface. The surface must sufficiently endure the weight and vibrations of the refrigeration unit. When the unit is installed in the planned location, it is necessary to provide a solid foundation to ensure the even weight distribution. The machine must be installed in a room, accessible only for qualified personnel. Otherwise, a fence at not less than two meters from the outer surface of the unit should surround the place. Positioning The intended location for installation must be well ventilated and spacious enough for maintenance. The unit should not be in near proximity with other machines and equipment or any flammable, combustible or explosive substances. Pipelines and cable raceways should not intersect with the connecting pipes or cables of the machine, as well as not to endanger the unit if broken. Leave sufficient space, equal to the units length, from water pipes connection side of the condensers, and the control board side, to allow for cleaning the heat exchangers. This space is also important installation and maintenance operations. Ventilation The machine emits heat, despite the fact that, when operating, the compressor is being cooled down by the Freon vapors. Provide adequate ventilation to keep the room at temperature below 50. Ensure that the room temperature is above 0 to prevent the freezing of the machine. Water drainage Position the machine near a water drain that can take away the water from the condenser, in case of repairs. Installation manual RCWC10D/22 IM- RCWC10D/22 15

16 Dimensions and minimal distances Installation manual RCWC10D/22 IM- RCWC10D/22 16

17 Foundation and mounting The machine must be fixed over previously prepared foundation. Fig.7 shows a drawing of the anchor points of the machine. The foundation must be strong enough to withstand the machine s weight. The mounting holes must be set out on the foundation, prior to mounting. When using metal foundation, it must be welded, bolted, or anchored, depending on the ground base. The foundation must provide at least 50mm levitation from the ground base, over which the machine is going to be mounted. On Fig.8, a separately offered foundation is shown. Fig.7 Anchoring points layout (Bottom view) Installation manual RCWC10D/22 IM- RCWC10D/22 17

18 A foundation for the condensing unit is separately available. The foundation is made of steel and colored similarly to the chassis. This foundation can be welded, bolted or anchored on the base..8 A steel foundation For securing the machine to the foundation, use self-locking nuts and bolts see Fig.9. An additional connection for mounting to the foundation must be made by the user. M12x40 washer locknuts Fig.9 Bolt connections to the foundation. Installation manual RCWC10D/22 IM- RCWC10D/22 18

19 Evaporator mounting RCWC 08 can be equipped with any type of evaporators. It is necessary to comply with the cooling capacity of the evaporators and its fans supply voltage. The evaporators are entirely controlled by the control board. The defrost is realized with electrical heaters. When mounting the evaporator, it is necessary to respect the minimal distances for service, maintenance and normal operation, It is also important that the evaporator is oriented in the refrigeration chamber in a way that provides the maximum amount of air circulation. Covers or fences that could obstruct the outgoing airflow, should not be placed in front of the evaporator. The evaporator mountings must be in accordance to its weight, and be able to withstand vibrations. It is recommended to fix the evaporator to a firm base, and not to the chambers insulation panels. See Fig.10. Dowel M8 Washers M8 Mounting profile Insulation Panel Evaporator Washers M8 Nut M8.10 Mounting an evaporator Installation manual RCWC10D/22 IM- RCWC10D/22 19

20 Dimensions and minimal installation spaces are shown on Fig.11 for evaporator models ermofin TEMB C E and ermofin TEMB B LR/AD h Dimensions and minimal installation spaces are shown on Fig.12 for evaporator model ermofin TEMB E LR/AD h Installation manual RCWC10D/22 IM- RCWC10D/22 20

21 Hydraulics installation The machine is equipped with water-cooled shell and tube condenser. WRV (Water Regulating Valve) to maintain the condensation pressure. flow sensor (Differential pressure sensor) for pump control. The unit can control up to two pumps primary pump and backup pump - (check the pumps parameters, and verify if they correspond to the units requirements). RCWCxxxXS models are equipped with sea-water condenser. A certificate is presented for the condensers. When designing the plant, the required flow rate and nominal fluid velocity must be assured. Any lower or higher flow or fluid velocity from the specified, could potentially lead to system malfunction, decreased reliability and damage Fig.31 and Fig.14. Min Max Volume [m 3 /h] Flow Rate [ m/s ] Water pressure [ bar ] 0 10 Table.2 Maximal operating parameters Pressure drop [ kpa ] Volume [m3/h] Fig13. Pressure drop over the shell and tube condenser Installation manual RCWC10D/22 IM- RCWC10D/22 21

22 3 2.5 Flow rate [m/s] Volume [m3/h].14. Fluid velocity through the shell and tube condenser Refrigeration system components The pipe components include all devices and control equipment used to insure normal operation of the units water cooling system. These elements and their position are described below on Fig.15. Inlet condenser pipe Air vents Manometers with diverting valves Pipe fittings Vibration dampers Shut-off valves Thermometers Filter strainer Outlet condenser Air vents Manometers with diverting valves Pipe fittings Vibration dampers Shut-off valves Thermometers Balancing valves Relief valve Flow rate sensor Installation manual RCWC10D/22 IM- RCWC10D/22 22

23 Fig.15 Condenser connection to water schematic diagram Risk of pipe damage. DO NOT tighten pipe connections. Make sure all pipes are clean and passable prior to installation. Connecting the condenser before washing and cleaning the water pipe system is prohibited. Connect a bypass in place of the unit in the water pipe system, only this way preform the cleaning operation with a cleaning agent. Water Outlet G3/4"-female Water Inlet G3/4"-female Fig.16 Water fitting dimensions Installation manual RCWC10D/22 IM- RCWC10D/22 23

24 Water manometers and thermometers For easy maintenance and service of the machine, connecting manometers and thermometers at the water inlet and outlet is recommended. The manometers must be mounted at a distance from the closest fitting equal to 5 times the diameter of the pipe. Relief valves The installation of water relief valve is mandatory. The relief valve insures the proper operation of the whole system. High operating pressure could possibly damage the condenser. Installation of the differential pressure sensor DP/W-01 For controlling the flow through the condenser and regulating the pump, a DP/W-01 sensor is mounted, which is available in the macine assembly. The sensor should be mounted as illustrated on Fig.15. The sensor monitors for pressure difference (drop) above the set point value. At lower pressure drop values, it turns off the refrigeration unit and the pump. Automatically attempts to turn the unit back on after 3 minutes interval. (Detailed description in appendix 2). The sensor measure ports must be installed at a distance from the closest fitting equal to 5 times the diameter of the pipe. The sensor connection ports are: 7/16 NPT Installation manual RCWC10D/22 IM- RCWC10D/22 24

25 Freon installation The external refrigeration pipe systems must insure the refrigerant flow from the machine to the evaporators in the refrigeration chambers. The pipe system must be constructed of copper tubes intended for refrigeration plants with nominal pressure of 40 bars at temperatures above 180 C Installation elements Suction line copper pipes with diameter Ø22 mm and insulation wall thickness δ=19 mm for Freon vapor transmission. Liquid line copper pipes with diameter Ø10 mm for liquid Freon transmission. Expansion valve for every evaporator; Evaporators with forced ventilation. Fig.17 Installation manual RCWC10D/22 IM- RCWC10D/22 25

26 Every evaporator must be connected to the corresponding inlet and outlet. At the outlet of each evaporator, an oil trap must be built. At every 3 meters, vertical pipe length there must be an oil trap Fig.18 (If the condenser is above the level of the evaporators). Fig.18 Oil trap The evaporators must be packaged with expansion valves with parameters corresponding to the type of Freon and evaporator cooling capacity. For detailed description on the installation of the expansion valve, see its installation instructions. When preforming the procedure of welding the copper pipes, make sure to prevent foreign bodies, sand, gravel, rust, and other waste materials that might damage the systems integrity from entering the pipelines. Installation manual RCWC10D/22 IM- RCWC10D/22 26

27 Mounting the expansion valve When welding the expansion valve it is necessary that it is wrapped tightly with a wet cloth (see Fig.19), so as to maintain the integrity of the device when carrying out the procedure. The expansion valve probe should be mounted in a horizontal position (Fig.20). Fig.19 Fig.20 Connecting to the unit When welding the copper tube to the refrigeration unit, it is necessary that the low pressure valves are wrapped tightly with a wet cloth, or other type of damped fabric (see Fig.21), so as to preserve the integrity of the elements in the course of the procedure. Fig.21 Installation manual RCWC10D/22 IM- RCWC10D/22 27

28 Leak testing The refrigeration unit is hermetically tested, dried, vacuumed and charged with nitrogen. After completing the installation of the Freon pipelines, they must be pressurized with nitrogen at 20 bars to be inspected for leakages. The test should continue for at-least 24 hours at a fixed temperature. The leakage test must be performed without opening the units valves. Check the evaporator installation only. All welds and fittings must be tested with soap foam. Vacuuming The pressure from the whole system including the refrigeration unit is carefully released after which the system is vacuumed for 8 hours minimum until reaching a vacuum of 0,5mm Hg. The vacuuming is performed through the LP and HP ports of the distribution board of the machine. The electric valves must be triggered manually with a permanent magnet. Freon charging The refrigeration unit works only with Freon R404A. Charging must be carried out only through the receiver port while the unit is stopped. Charging while the unit is running can be done only with Freon in gas state, through the LP port of the distribution board. The unit is conclusively charged while running at full load, the amount of refrigerant is measured with a scale and the quantity is written on machine label. Installation manual RCWC10D/22 IM- RCWC10D/22 28

29 Evaporator drainage For each evaporator a drainage system shall be built to drain the water from the defrost cycle. The system must be constructed with minimal inclination 5cm/m pipe Fig.22. Prior to connecting the drainpipes to the central drainage system, a siphon must be mounted, to prevent the odors from spreading in the refrigeration chamber. The evaporator pipe must be hermetically sealed to the central drainage system. min 5cm/m Fig.22 Installation manual RCWC10D/22 IM- RCWC10D/22 29

30 Electrical connections Connecting the main supply Before connecting the power supply, make sure that the machine corresponds to the technical specifications and drawings in this guide. The refrigeration unit shall be necessarily electrically grounded through connection to the ships hull. The party that performs the installation must comply with the standards applicable to electrical connections. The manufacturer is not liable for damage and/or inflicted harm due noncompliance with the terms mentioned above. The following rules must be carried out: Connecting the supply - 3 phases + earth. The power source must be able to provide the power required to supply the refrigeration unit. The circuit breakers supplying the unit must be sized according to the machine power. Make sure the power cable wire is with the required section area. Each compressor, pump and fan is equipped with a motor protection device located in the control switchboard. The cables must enter the switchboard through the cable glands provided for them, which are shown on the installation schematic. The refrigeration unit must be installed in conformity with the Machinery Directive (98/37/EC), The Low Voltage Directive (7323/EC), Electromagnetic Interference Directive (89/336/EC), as well as other applicable regulations in the country of installation. The machine should not be operated if the installation is not carried out accordingly to the terms and instructions of this guide The wires supplying the device must be made out of copper, electrically isolated, have a certificate for compatibility with the working environment and fire safety, withstand the operating voltages and currents. A description of the control switchboard components are shown on Fig.23. Installation manual RCWC10D/22 IM- RCWC10D/22 30

31 F3 F1 TR1 Q1 F2 F4 F5 F6 F7 F9 F12 F14 IN1 IN2 R7 R8 R9 F8 G5 G4 G1 G2 G3 K1 K2 K3 K4 K5 C1 G6 F11 G7 G8 F13 K11 K10 K9 K8 K7 K6 Q1 CIRCUIT BREAKER F1 FUSE MASTER OPERATIONAL SUPPLY F2 FUSE OPERATIONAL SUPPLY COMPRESSOR 1 F3 FUSE SUPPLY HEATERS COMPRESSOR 1 AND 2 F4 FUSE OPERATIONAL SUPPLY COMPRESSOR 2 F5 FUSE OPERATIONAL SUPPLY PUMP 1 AND 2 F6 FUSE OPERATIONAL SUPPLY INJECTION SYSTEM COOLING FLUIDS AND POWER REGULATOR 50/100% F7 FUSE OPERATIONAL SUPPLY COLD STORAGE VEGETABLES F8 FUSE HEATER DEFROST COLD STORAGE DRY STORE F9 FUSE OPERATIONAL SUPPLY COLD STORAGE DRY STORE F11 FUSE HEATER DEFROST COLD STORAGE FISH F12 FUSE OPERATIONAL SUPPLY COLD STORAGE FISH F13 FUSE HEATER DEFROST COLD STORAGE MEAT F14 FUSE OPERATIONAL SUPPLY COLD STORAGE MEAT G1 MOTOR PROTECTION COMPRESSOR 1 G2 MOTOR PROTECTION COMPRESSOR 2 G3 MOTOR PROTECTION PUMP 1 G4 MOTOR PROTECTION PUMP 2 G5 MOTOR PROTECTION FAN COLD STORAGE VEGETABLES G6 MOTOR PROTECTION FAN COLD STORAGE DRY STORE G7 MOTOR PROTECTION FAN COLD STORAGE FISH G8 MOTOR PROTECTION FAN COLD STORAGE MEAT K1 CONTACTOR COMPRESSOR 1 K2 CONTACTOR COMPRESSOR 2 K3 CONTACTOR PUMP 1 K4 CONTACTOR PUMP 2 K5 CONTACTOR FAN COLD STORAGE - VEGETABLES K6 CONTACTOR HEATER DEFROST COLD STORAGE DRY STORE K7 CONTACTOR FAN COLD STORAGE DRY STORE K8 CONTACTOR HEATER DEFROST COLD STORAGE FISH K9 CONTACTOR FAN COLD STORAGE FISH K10 CONTACTOR HEATER DEFROST COLD STORAGE MEAT K11 CONTACTOR FAN COLD STORAGE MEAT R7 TIME RELAY COMPRESSOR 1 AND 2 R8 RELAY POWER REGULATOR 1,5 BAR R9 RELAY HIGH PRESSURE SUCTION LINE IN1 THERMO REGULATOR HOT GAS COMPRESSOR 1 IN2 THERMO REGULATOR HOT GAS COMPRESSOR 2 TR1 TRANSFORMER 380/24 C1 CONNECTION TERMINAL PINS Fig.23 Description of the components of the switchboard Installation manual RCWC10D/22 IM- RCWC10D/22 31

32 All wires mast be of proper size and type. The use of unsuitable cables could lead to accidents or fire. The machine controls the pumps of the cooling water. Each pump is equipped with a motor protection device. Check the rotation direction after connecting the pump. The switchboard regulates the temperature of each chamber through an electronic controller, which manages the electric valves and defrosts heaters. The evaporators are electrically connected using junction boxes A and B. The defrost heaters and fans are connected through box A. The chamber temperature control and defrost sensors are connected through box B. A B A B FAN HEATER L1 L2 L3 PE PE L3 L2 L1 SENSOR TEMP. DEFROST SENSOR TEMP. ROOM RA1 RA2 RB1 RB2 Fig.24 Detailed schematic for connecting the electrical equipment is given in appendix 1. Installation manual RCWC10D/22 IM- RCWC10D/22 32

33 Installation manual RCWC10D/22 IM- RCWC10D/22 33