Summary of Contents for Star Cold MC001E
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Page 1: Condensing Units
Star Cold MC-line CONDENSING UNITS INSTALLATION, OPERATION AND MAINTENANCE BE VERY CAREFUL WHEN YOU MEET THIS INDICATION ON THE LEFT SIDE... -
Page 2: Table Of Contents
INSTALLATION, OPERATION AND MAINTENANCE MC001E GENERAL INFORMATION AND INTRODUCTION ................4 1.1. SYSTEM TECHNICAL DATASHEET....................4 PROCEDURES BY CLIENT ON DELIVERY..................4 2.1. CONDITION CHECK ........................4 2.2. UNLOADING AND HANDLING OPERATIONS ................4 2.2.1 SLINGING AND PRECAUTIONS ....................... 4 2.2.2 POSITIONING.............................. 5 LOCATION AND POSITIONING ......................5 3.1. - Page 3 INSTALLATION, OPERATION AND MAINTENANCE MC001E SYSTEM START-UP IN PRESENCE OF QUALIFIED PERSONNEL..........12 12.1. PRELIMINARY CHECKS......................12 12.1.1 CASING PREHEATING ..........................12 12.1.2 PRECAUTIONS ............................12 12.1.3 CHECKING THE DIRECTION OF COMPRESSOR ROTATION ............. 13 12.1.4 CHECKING THE DIRECTION OF FAN ROTATION ................13 12.1.5...
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Page 4: General Information And Introduction
INSTALLATION, OPERATION AND MAINTENANCE MC001E GENERAL INFORMATION AND INTRODUCTION This manual regards the systems designed for cooling, conserving and freezing at medium, low and very low temperatures, with single and multiple circuits, identified with the symbols: SP-UM-UMA MC – MCC -MCI... -
Page 5: Positioning
INSTALLATION, OPERATION AND MAINTENANCE MC001E 2.2.2 POSITIONING When possible, transfer the equipment directly from the transport means to the relative base, which must be flat and stable; if this is not possible, equipment must always be placed on horizontal, stable and even surfaces. -
Page 6: Earthing
INSTALLATION, OPERATION AND MAINTENANCE MC001E 3.1.6 EARTHING The installation must be connected to the earthing line, using the terminal supplied by the manufacturer, before the initial power-up of the equipment during installation. Connections, installation of the earthing line, total efficiency of the latter and compliance with current standards throughout use is the responsibility of the user. -
Page 7: System Sealing Efficiency Check
INSTALLATION, OPERATION AND MAINTENANCE MC001E Therefore, before joining operations, the pressure must be discharged from the machine, paying attention to the fact that this machine is pressurised. If the machine is already discharged, the following may be required: 1. locate the leakage 2. -
Page 8: Electrical Connections Between The Condensing Unit And Control Panel
INSTALLATION, OPERATION AND MAINTENANCE MC001E 5.2.4 ELECTRICAL CONNECTIONS BETWEEN THE CONDENSING UNIT AND CONTROL PANEL. thermostat sensor, compressor control elements, defrost indicator lamp, start-stop indicator lamps 5.2.5 POSITION OF THERMOSTAT SENSOR The position of the thermostat sensor must be chosen with care, avoiding impact with air in anomalous conditions such as air deriving from doors opened in a cold room, from compensation valves or other. -
Page 9: Inspection Of The Condenser Fans Requires Qualified Personnel
INSTALLATION, OPERATION AND MAINTENANCE MC001E IMMEDIATELY AFTER CHARGING, CHECK SYSTEM SEALING EFFICIENCY, TESTING ALL COUPLINGS WITH A DETECTOR ABLE TO READ MINIMAL REFRIGERANT LEAKS. IN THE RARE CASE THAT A LEAK IS DETECTED, DO NOT PROCEED WITH REPAIRS BY WELDING UNTIL A REFRIGERATION TECHNICIAN HAS BEEN CALLED AND THE RELATIVE SECTION HAS BEEN CLEANED THOROUGHLY TO REMOVE ALL TRACES OF OIL. -
Page 10: Fuse Replacement
INSTALLATION, OPERATION AND MAINTENANCE MC001E 8.5. FUSE REPLACEMENT This operation also requires access to the interior of the panel. A blown fuse indicates a serious malfunction of connections or utility, or may be caused by an external source, at times due to atmospheric discharges. -
Page 11: Refrigerant Pressure Defect
INSTALLATION, OPERATION AND MAINTENANCE MC001E 10.2. REFRIGERANT PRESSURE DEFECT If pressure falls to below factory settings, the minimum pressure switch trips. This shuts down the compressor motor, but not permanently. If the intake pressure returns to normal values, the equipment re-enables start-up. This is acceptable if it concerns a transitory occurrence, but if repeated requires specific maintenance. -
Page 12: Signals
INSTALLATION, OPERATION AND MAINTENANCE MC001E Control of the electrical phase sequence is important to guarantee correct rotation of the motor in screw and scroll compressors. In the first case, the correct sequence is guaranteed by an electronic controller named INT389 which also checks for phase failure, winding temperature overload alarms and compressor start-up delays. -
Page 13: Checking The Direction Of Compressor Rotation
INSTALLATION, OPERATION AND MAINTENANCE MC001E and fitted with caps. • Ensure that the voltage on the terminals between the phases and neutral is as specified. • For part-winding motors: strictly observe the order of the part-windings indicated on the electrical wiring diagram enclosed. -
Page 14: Precautions In The Event Of Prolonged Disuse
INSTALLATION, OPERATION AND MAINTENANCE MC001E At this point the container without cartridge should be closed, to eliminate any cause of pressure drops. PRECAUTIONS IN THE EVENT OF PROLONGED DISUSE Decommissioning for prolonged disuse requires a number of precautions. 13.1. CLOSURE OF REFRIGERANT VALVES In the event of prolonged shutdown, the following operations are recommended: •... -
Page 15: Casing Heater Check
INSTALLATION, OPERATION AND MAINTENANCE MC001E Also ensure the regular flow of refrigerant via the sight gauge on the liquid line. This operation should be performed with care as the system must remain in operation. 14.2.5 CASING HEATER CHECK Check efficiency of the casing heater. -
Page 16: Protecting The Environment - Maintenance - Scrapping
INSTALLATION, OPERATION AND MAINTENANCE MC001E PROTECTING THE ENVIRONMENT – MAINTENANCE - SCRAPPING Refrigerant fluids are subject to legal regulations that prohibit disposal into the environment, with compulsory recovery. Lubricant oils are also subject to similar regulations. Take into account the above when performing maintenance or scrapping refrigeration systems. -
Page 17: Troubleshooting
INSTALLATION, OPERATION AND MAINTENANCE MC001E TROUBLESHOOTING Fault finding procedures and repairs must be performed by qualified personnel or may require intervention of the manufacturer. In the event of faults or malfunctions take care to observe the following section. Excessive confidence in procedures may cause damage to the environment or physical injury. - Page 18 INSTALLATION, OPERATION AND MAINTENANCE MC001E TROUBLE CAUSE SOLUTION Vapour bubbles on the sight glass. Low condensing pressure. See: “Condensing pressure too low”. Liquid receiver shutoff valve not totally Open completely the shut off valve. open. Lack of refrigerant in the plant.
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