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SYSTEM OPERATION
31
RESTRICTOR ORIFICE ASSEMBLY
IN COOLING OPERATION
RESTRICTOR ORIFICE ASSEMBLY
IN HEATING OPERATION
In the cooling mode, the orifice is pushed into its
seat, forcing refrigerant to flow through the metered
hole in the center of the orifice.
In the heating mode, the orifice moves back off its
seat, allowing refrigerant to flow unmetered around
the outside of the orifice.
EXPANSION VALVE/CHECK VALVE ASSEMBLY
IN COOLING OPERATION
EXPANSION VALVE/CHECK VALVE ASSEMBLY
IN HEATING OPERATION
Most expansion valves used in current Amana
®
Brand Heat Pump products
use an internally checked expansion valve.
This type of expansion valve does not require an external check valve as shown above.
However, the principle of operation is the same.