What must technicians check for a safe air conditioning installation?

Technicians must ensure proper electrical connections and grounding during an air conditioning installation for several critical reasons. First, safe electrical connections prevent any potential hazards such as short circuits or electrical fires, which can result from improper wiring. Grounding is crucial as it protects both the equipment and the users by allowing electrical currents to safely dissipate in the event of a fault. This significantly reduces the risk of electrical shock and enhances the overall safety of the installation.

While proper refrigerant levels, size of ductwork, and aesthetic placement of the unit are important aspects of an air conditioning system's performance and efficiency, they do not directly address the immediate safety concerns associated with electrical hazards. Therefore, ensuring that electrical connections are secure and correctly grounded is paramount for a safe and compliant air conditioning installation.