Screw compressors – R134a
Air cooled Water chillers
ERBAY Water Chillers are designed to outdoor installation and provide chilled water leaving temperatures which are given on capacity tables in our factory carrying out EN ISO 9001:2008 Quality Management System. The Units are supplied to ready for installation. All connections, oil and refrigerant charge and required tests are made in our factory. Our units are in conformity with health and safety requirements of following European Union directives and relevant hormonized standarts.
Machinery Directive (MD): 2006/42/EC
Low Voltage Directive (LVD): 2006/95/EC
Electromagnetic Compatibility Directive (EMC) : 2004/108/EC
Pressure Equipment Directive (PED) : 97/23/EC
The capacity of the Units varying between 112,7 kW and 769,7 kW and it’s composed of the following parts;
Cooling Compressor: 1 or 2 pieces semi – hermetic compact screw compressors, working with R134a refrigerant are used according
to customer request. Screw compressors as it’s characteristics can operate without maintenance need for a long time. Maintenance of the screw compressors are quite simple because of the less amount of the moving parts in it. Screw compressors are equipped with discharge shut-off valve, check -valve that prevents to return back of the refrigerant from the discharge line, oil level switch, oil sight glass, oil separator, oil filter, crankcase heater, capacity control solenoids, vibration dampers, motor protection device and temperature sensors (PTC). Required power supply is 3 ph, 400 V, 50 Hz.
Condenser: Air cooled condensers are manufactured by pipes and aliminum fins. Current overload protected, high efficient direct drive axial fans which have noiseless bearing are mounted on the Unit to provide condensation of the refrigerant.
Evaporator: Direct expansion evaporator is manufactured in Shell & Tube form and special high efficient copper tubes are fixed to steel tubesheet holes with tube expander method. It’s allowed to maintenance and clean up because of the removable tube bundle. Evaporators are in conformity with EN 14276-1 and EN 13445 standarts and designed for chilling water and glycol brines. External surface of evaporators and suction lines are insulated with insulation material with suitable thickness.
Electrical Control Panel: The panel is designed to IP54. To operate the Unit automatically and securely, the panel is composed of two different section. The first section is power section and the other one is control section.The panel is equipped with enough number of contactors, thermics,fuses and on-off switchs. The panel and wiring are in conformity with EN 60204-1 standart. Required power supply is 3 ph, 400 Volt, 50 Hz.
Microprocessor Control System: Microprocessor control system is used on the Unit. By means of this; entering and leaving water temperatures,refrigerant pressures on the suction and discharge lines, occured superheat temperature, operating times of compressors, all faults occured on the system and all alarm history can be seen on the digital screen and also capacity control can be made easily. Besides condenser fans are controlled automatically depending on the ambient temperature and the operating times of each compressor is balanced so optimum efficient operation of the Unit is provided.
Components of the Cooling Circuit: To operate the Unit automatically and securely; electronic expansion valve, drier-filter, sight glass, relief valve, flow – switch, low and high pressure transmitters and shut-off valves are included.
