1. Unhook chain at the flapper end: 2. Adjust the flapper chain according to the length of your old flapper chain: Please click here for detailed instructions on how to adjust the flapper chain. 3. Adjust float to the location it was on the previous flapper by removing the black disks: 4. Adjust float higher on the chain:
Variable air volume. Variable Air Volume (VAV) is a type of heating, ventilating, and/or air-conditioning (HVAC) system. Unlike constant air volume (CAV) systems, which supply a constant airflow at a variable temperature, VAV systems vary the airflow at a constant temperature.
Quick Answer. VAC is an electrical voltage in an alternating current circuit. The power system supplying homes and businesses in the United States uses AC 120 V, while in Europe the system uses AC 240 V. Continue Reading.