Control issues

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F25Refrigeration F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS COMBINED HEATING AND REFRIGERATION SYSTEMS HEAT-PUMP SYSTEMS

F25B2600/00Control issues

F25B2600/01Timing F25B2600/02Compressor control F25B2600/021Inverters therefor F25B2600/022for multi-stage operation F25B2600/023controlling swash plate angles F25B2600/024by controlling the electric parameters F25B2600/025by controlling speed F25B2600/0251with on-off operation F25B2600/0252with two speeds F25B2600/0253with variable speed F25B2600/026by controlling unloaders F25B2600/0261external to the compressor F25B2600/0262internal to the compressor F25B2600/027by controlling pressure F25B2600/0271the discharge pressure F25B2600/0272the suction pressure F25B2600/05Refrigerant levels F25B2600/07Remote controls F25B2600/11Fan speed control F25B2600/111of condenser fans F25B2600/112of evaporator fans F25B2600/13Pump speed control F25B2600/15during shut down F25B2600/17by controlling the pressure of the condenser F25B2600/19Refrigerant outlet condenser temperature F25B2600/21Refrigerant outlet evaporator temperature F25B2600/23Time delays F25B2600/25Control of valves F25B2600/2501Bypass valves F25B2600/2503Condenser exit valves F25B2600/2505Fixed-differential control valves F25B2600/2507Flow-diverting valves F25B2600/2509Economiser valves F25B2600/2511Evaporator distribution valves F25B2600/2513Expansion valves F25B2600/2515Flow valves F25B2600/2517Head-pressure valves F25B2600/2519On-off valves F25B2600/2521On-off valves controlled by pulse signals F25B2600/2523Receiver valves F25B2600/2525Pressure relief valves