Title: +175=737.001_IK001_Brukermanual for Refra varmepumpe.Produktinformasjon.pdf
© UAB „Refra“ S. Dariaus ir S. Gireno g. 179, LT- 02189 Vilnius, Lithuania, Tel. +370 52031020 info@refra.eu www.refra.euUSER MANUALMAXIMUM ALLOWABLE PRESSUREThe entire unit must be designed and operated so that the maximum allowable pressure (PS) would not asceed in any part of the plant (see name plate indications).Pressure relief valves are essential for receivers and condensers (pressure vessels) if:it is to be expected that the maximum allowable pressure will be exceeded due to external heat sources (e.g. fire),or if:the entire refrigerant charge of the plant is more than 90% of the pressure vessel's charge capacity at 20°C. Charge capacity means the volume between operationally lockable valves before and after a pressure vessel. In case of two vessels being mounted in series, it is the volume of both vessels and the connecting pipe.In these cases it is preferable to install relief devices, which lead the refrigerant to the low-pressure side of the plant (emission reduction).