Air Systems Cleaning Specialist (ASCS) Practice Exam

The primary reason for flushing and cleaning the condensate drain line during Type 2 Coil Cleaning is to prevent standing water in the Air Handling Unit (AHU). Ensuring that the condensate drain line is clear allows for proper drainage of moisture produced during the cooling process. When the drain line is obstructed, water can accumulate in various parts of the HVAC system, including the AHU, leading to a host of issues.

Standing water can create an environment conducive to mold growth and bacteria proliferation, which not only affects air quality but can also cause damage to system components over time. Furthermore, stagnant water can result in further blockages and operational inefficiencies in the HVAC system. Therefore, maintaining clear condensate drainage is crucial for both system performance and indoor air quality.