Final Answer:
The owner must keep records of refrigerant added to a low-pressure system during service and maintenance if the system charge is 2) between 50 and 500 pounds.
Step-by-step explanation:
According to environmental regulations, specifically the Clean Air Act, the owner must keep records of refrigerant added to a low-pressure system during service and maintenance if the system charge is between 2) 50 and 500 pounds.
This requirement is in place to monitor and manage the use of refrigerants, which can have significant environmental impacts, including ozone depletion and contributing to global warming. The threshold of 50 to 500 pounds is a regulatory measure aimed at ensuring proper handling and documentation for systems with a moderate to large refrigerant charge.
The calculation of the system charge is essential to determine the applicability of the record-keeping requirement. The system charge refers to the total amount of refrigerant present in the system. Owners need to weigh or measure the refrigerant added during service and maintenance activities to track whether the charge falls within the specified range. This ensures compliance with environmental regulations and facilitates the responsible management of refrigerants to mitigate their potential adverse effects on the environment.
Understanding and adhering to these regulations are crucial for owners and technicians in the HVAC (Heating, Ventilation, and Air Conditioning) industry. Keeping accurate records for systems within the specified charge range helps authorities monitor and enforce environmental standards, contributing to the overall goal of reducing the environmental impact of refrigerant use in various systems.