Question

Which of the following methods can be used to pressurize the letter R1233ZD system for the purpose and I opening the system for non-major repair?

A. Adding nitrogen to the system.
B. Warming the liquid refrigerant in the system.
C. Adding compressed air to the system's condenser.
D. Adding carbon dioxide to the system's condenser and evaporator

Answer 1

For non-major repairs, adding nitrogen is the recommended method to pressurize a refrigerant system, such as R1233ZD, due to its inert properties.

Step-by-step explanation:

The correct method to pressurize the refrigerant R1233ZD system for the purpose of opening the system for non-major repair is adding nitrogen to the system. Warming the liquid refrigerant in the system can also increase pressure, but adding foreign gases like compressed air or carbon dioxide is not recommended due to risks of contamination and incompatibility with the refrigerant and system materials. Nitrogen is inert and commonly used in the HVAC industry for pressure tests and purging before system repairs.