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Rapport 2414173 - October 2007 __________________________________________________________________ Figure 30 : Compressor dimensions Standard compressors from Dorin are PED certified and equipped with: • electric motors with thermistor protection • oil pump and oil cooler : the oil temperature is controlled so as to remain within the 30 to 65°C range in order to reduce oil carry-over and R744 solubility. • low and high pressure relief valve with relieving set point of respectively 100 bar (Pss) and 163 bar (PS) • crankcase heater • special lubricant for R744 transcritical application. In Japan, all Ecocute manufacturers use their own, proprietary transcritical compressor, but only Sanyo has a complete product line that is marketed independently of their Ecocute model. These rotary, double-stage compressors are used in some of the Coca Cola vending machines. The compressor shell is at the intermediate pressure, as shown by Figure 31. __________________________________________________________________________________________ SHERPHA PROJECT - Transcritical R744 Heat Pumps – Technician's Manual 29/63PDF Image | Transcritical R744 (CO2) Heat Pumps 2017
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