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A purge recovery system is used in a centrifugal air conditioning or refrigeration system to _____.

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admit only enough fresh outside air to provide proper ventilation  reduce the air reheating system load  lower the compressor head pressure  operate the purge recovery unit continuously  
remove any air that may accumulate in the system  take out unpleasant fumes from the refrigerant  vent off excess refrigerant in an emergency  permit opening the refrigerating system for cleaning and inspecting  
PE  E  purge  regen  
separating chamber  system of baffles  purge valve  vacuum reducing valve  
central air conditioning system  high velocity system  low velocity system  single duct system  
increase the flow of the cooling water through the condenser  adjust the high pressure cutout to maintain the desired pressure  open the hot gas bypass temporarily to reduce capacity  purge non-condensable gases to reduce the excess pressure  
transmit the rudder angle to the bridge indicator  prevent the control linkage from striking the stops when hard over  automatically purge all entrained air from the system  send hydraulic signals to the receiving unit  
change the expansion valve adjustment  readjust the water regulating valve to increase the flow of water  purge air from the condenser  clean the waterside of the condenser  
discharge service valve as a vapor  suction service valve as a liquid  charging valve as a liquid  condenser purge valve as a vapor  
opposing operational drag  pressure distribution  differential  system purge  
reclaims water  purges air without losing refrigerant  purges air with some loss of refrigerant  purges lube oil from the refrigerant  
drain the accumulators and purge with oxygen  bleed off all stored energy from the accumulators completely  charge the accumulators to prevent system energy loss  pump the hydraulic fluid into the accumulators to prevent fluid loss  

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