GEA HGX4 CO2 Series Assembly Instructions Manual

Contents

GEA HGX4 CO2 Series Assembly Instructions Manual Manual pdf 18 page image

18DGBFE96020-09.2013-DGbFEI6| CommissioningWARNING! When the compressor is not running, depending on ambienttemperature and amount of refrigerant charge, it is possible thatthe pressure may rise and exceed permitted levels for thecompressor. Adequate precautions must be taken to preventthis happening (e.g. using a cold storage medium, a receiver tank,a secondary refrigerant system, or pressure relief devices).6.1 Preparations for start-upINFO! In order to protect the compressor against inadmissible operatingconditions, high-pressure and low-pressure pressostats controls aremandatory on the installation side.The compressor has undergone trials in the factory and all functions have been tested. There aretherefore no special running-in instructions.Check the compressor for transport damage!6.2 Pressure strength testDANGER! Bursting! The compressor must only be pressurised using nitrogen(N 2). Never pressurise with oxygen or other gases!The maximum permissible overpressure of the compressor must notbe exceeded at any time during the testing process (see name platedata)! Do not mix any refrigerant with the nitrogen as this couldcause the ignition limit to shift into the critical range.The compressor has been factory-tested for pressure resistance. The following must be observed ifthe entire plant is subjected to an additional pressure strength test:Test the refrigeration circuit according to EN 378-2 or a corresponding safety standard.6.3 Leak testDANGER! Bursting!Do not mix any refrigerant with the nitrogen (N2) as this could causethe ignition limit to shift into the critical range.Carry out the leak test of the refrigerating system in accordance with EN 378-2 or a correspondingsafety standard without including the compressor.