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Frish air Handling Unit (FAHU)
Water Cooled Chiller Diagram
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The refrigeration cycle and reversing valve operation in a heat pump system, which provides both heating and cooling. The compressor pressurizes the refrigerant, sending it through the discharge port toward the outdoor coil (condenser in cooling mode, evaporator in heating mode). A metering device (expansion valve) regulates the refrigerant flow before entering the indoor coil, which functions as either an evaporator or condenser depending on the mode. The reversing valve directs the refrigerant flow, switching between heating and cooling modes. In cooling mode, heat is expelled outdoors, while in heating mode, heat is absorbed from outside and transferred indoors. The control circuit and solenoid valve regulate the reversing valve operation based on thermostat signals. This system allows for energy-efficient temperature control in all seasons, making heat pumps a sustainable HVAC solution.
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This image explains how to convert pressure units from Bar to PSI (Pound per Square Inch).

Basic conversion:
1 Bar = 14.5 PSI

Conversion formula:
Pressure (Bar) × 14.5 = Pressure (PSI)

Example calculation:
24 Bar × 14.5 = 348 PSI

So, a pressure of 24 Bar is equal to 348 PSI.

The image also shows a manometer (pressure gauge) as an illustration to demonstrate the relationship between Bar and PSI.