GEA Bock HGX2 CO2 T Series Assembly Instructions Manual

Also see for Bock HGX2 CO2 T Series: Assembly instructions Repair instruction Assembly instructions

Contents

20DGBFE96032-04.2013-DGbF6 | CommissioningThe compressor is fitted with two decompression valves. One valve each on thesuction and discharge side. If excessive pressures are reached, the valves openand prevent further pressure increase.Thereby CO2 is blown off to the ambient (see also Chapter 7.6)!In the event that a pressure relief valve activates repeatedly, check valve andreplace if necessary as during blow-off extreme conditions can occure, whichmay result in a permanent leak. Always check system for refrigerant loss afteractivation of pressure relief valve!6.7 Decompression valveCO2 streamingoutFig. 206.6 Start-upWARNING! Ensure that both shut-off valves are open before starting thecompressor!Check that the safety and protection devices (pressure switch, motor protection, electrical contactprotection measures, etc.) are functioning properly.Switch on the compressor and let it run for at least 10 minutes.The machine should reach a state of equilibrium.Check the oil level: The oil level must be visible in the sight glass.After a compressor is replaced, the oil level must be checked again. If the level is too high, oilmust be drained off (danger of oil liquid shocks; reduced capacity of the refrigerating system).ATTENTION! If larger quantities of oil have to be topped up, there is a risk of oilimpact effects. If this is the case, check the oil return!The decompression valves do not replace any pressure switches and theadditional safety valves in the system. Pressure switches must always be installedin the system and designed or adjusted in accordance with EN 378-2 or appro-priate safety standards.Failure to observe can result in risk of injury from CO2 streaming out of the twodecompression valves!