What occurs when registers in uninhabited rooms are closed while operating in heating mode?

What occurs when registers in uninhabited rooms are closed while operating in heating mode?

• A. The discharge pressure and temperature decrease
• B. The discharge pressure and temperature remain stable
• C. The discharge pressure and temperature increase
• D. The compressor shuts down

Answer: (C)

When registers in uninhabited rooms are closed while the heat pump is operating in heating mode, the discharge pressure and temperature increase. This phenomenon occurs due to the restriction of airflow within the system. When registers are closed, the heated air from the heat pump can't disperse into the uninhabited areas. As the heat pump continues to operate, the compressor works harder to push the refrigerant through the system because the pressure starts to build up due to the reduced airflow. This increase in pressure correlates with an elevation in temperature as the refrigerant is compressed further. The system essentially encounters resistance, and this results in an increase in both the discharge pressure and temperature. Properly managing airflow is crucial for efficient heat pump operation, and closing registers in unoccupied rooms can lead to inefficiencies and potential damage to the heat pump system over time.

When registers in uninhabited rooms are closed while the heat pump is operating in heating mode, the discharge pressure and temperature increase. This phenomenon occurs due to the restriction of airflow within the system. When registers are closed, the heated air from the heat pump can't disperse into the uninhabited areas. As the heat pump continues to operate, the compressor works harder to push the refrigerant through the system because the pressure starts to build up due to the reduced airflow.

This increase in pressure correlates with an elevation in temperature as the refrigerant is compressed further. The system essentially encounters resistance, and this results in an increase in both the discharge pressure and temperature. Properly managing airflow is crucial for efficient heat pump operation, and closing registers in unoccupied rooms can lead to inefficiencies and potential damage to the heat pump system over time.