The condenser is an important device used in the high pressure side of a refrigeration system. In fact, it may be of some benefit in lubricating valves, etc. 3.6 Hermetic Refrigerant Compressor. The compressor is driven by an electric motor mounted directly on the compressor crankshaft, with both the motor and the compressor working parts hermetically sealed within a common enclosure. All labs had previously been audited by the TÜV Süd. state from a gas back to a liquid. What makes these PAG oils from Behr Hella Service so special, is that they are not only suitable for use with R1234yf, but can also be used with the refrigerant R134a. Each crankshaft rotation achieves actions: suction, compression, and discharge. The condenser produces liquid at 45oC. 12 Pages. For a typical evaporator-expansion valve configuration a minimum stable superheat of at least 5K is required. Since in the air-conditioning circuit is a higher pressure, the oil is also partially pushed back into the compressor. The accessible-hermetic motor-compressor design was pioneered by Emerson Climate Technologies, Inc. and is widely used in the popular Copelametic® models. Refrigerant burning in the terminal box may only hap- The type label that can be found on every hermetic compressor contains critical information for the customer or user, as well as for the dispatch process. Toxic pressures to the previous refrigerant with zero ODP from DuPont Halogen free refrigerants 09.18 Tab. Sorry, preview is currently unavailable. 1 0 obj 8.4.4.2 Verification of driver capability and startup conditions. This protection is provided in the form of a pressure-temperature sensor and pressure limiting valves on the compressor. There is always a risk of liquid refrigerant entering compressor suction which can cause severe damage to the compressor as liquid is non-compressible. Miniature BLDC Rotary Refrigeration Compressors. These machines have to be started up without any operational issues. MTZ compressors can be used in new installations and also to replace Maneurop® MTE compressors in existing installations. The Compressor, Its Components, and Its Functions . Compressor model MX21FBa Voltage 220-240V 50Hz ~1 Refrigerant R404A APPLICATION COMPRESSOR MOTOR Application Low Back Pressure Displacement 20,72 cm³ Nominal Power 3/4 hp Refrigerant R404A Diameter 34,93 mm Voltage/Frequency 220-240V 50Hz Evaporating Temp. Contact with refrigerant, mixtures of refrigerant and oil, or other chemicals can cause a variety of injuries including burns and frostbite. The lubricant used in refrigeration compressors consists of an oil and refrigerant mixture, and the refrigerant concentration can be up to 40 wt%. In Handbook of Liquefied Natural Gas, 2014. A refrigerant compressor is a machine used to compress the refrigerant from the evaporator and to raise its pressure so that the corresponding temperature is higher than that of the cooling medium. An adhesive label show-ing this warning sign is enclosed with the Oper-ating Instructions. state of the refrigerant. -40,0 ºC to -10,0 ºC Stroke 21,62 mm Voltage range 187-255 V 12V Mini Compressor. 2 C6.2.31/0818/E 1.2 Safety statements Refrigerant compressors must be employed only for their intended use. The system has to be labelled according to the applicable standards and legislation. (a) Draw a schematic of the system. Seltec compressors are assembled units which use only a few basic body styles. 4 HASEGAWA SAFETY INSTRUCTIONS & GUIDELINES INTRODUCTION Thank you for selecting the HASEGAWA reciprocating compressor unit. Any other relevant information Hasegawa Refrigeration Ltd. provides the information enclosed as a guide and is subject to periodic revision. 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