HVAC engineers

  Vapor- compression refrigeration loop what each part does Flow path (colors match the sketch) High side: Compressor → condenser → receiver →     filter-drier sight glass (liquid & moisture indicator) → solenoid valve →  expansion valve. Low side: Evaporator→ suction accumulator → suction filter ball valve→ low-pressure switch →compressor. Motors drive the condenser fan and the evaporator blower. Component roles (in order of flow) 1 Compressor: Pulls low-pressure vapor from the evaporator and compresses it to high-pressure, high-temperature vapor. Sets the cycle. 2 Oil separator: Strips oil from discharge gas and returns it to the crankcase. Cuts oil carry-over. 3 Condenser + fan motor: Rejects heat to ambient. Vapor condenses to liquid and subcools. 4 Receiver: Stores and stabilizes the liquid charge. Ensures solid liquid feed to the line. 5 Filter-drier: Removes moisture, acids, and debris.  Protects the TXV and compressor. 6 Sight glass / moisture in...