Heating, ventilation, and air conditioning (HVAC) systems are integral to maintaining indoor comfort. These systems comprise intricate components, and among them, service valves play a…
Category: Service
Purpose – This procedure describes how to calculate the quantity of airflow in cubic feet per minute (CFM) being delivered by a fan coil containing…
Purpose — This procedure describes how to determine if airflow across the evaporator in a cooling system is adequate. For proper operation of a cooling…
Purpose – This procedure describes how to measure the temperature rise in fossil-fuel furnaces. Temperature rise is the difference between the return air temperature entering…
The flame rectification sensor is commonly used in high efficiency furnaces that use direct burner ignition. Direct Burner Ignition System Flame Rectification Circuit — Direct…
Thermocouples are used on residential gas furnaces equipped with standing pilots. A standing pilot is one which burns continuously, whether the main burner is on…