Analyses of static balance commissioning and manual control damper installation in VAV systems

The analysis results indicate that the effect of the manual control dampers in the main duct and the VAV manifold ducts on the static balance commissioning is very limited. Considers that the correct way should be checking the dynamic equilibrium at the typical time and adjusting the dynamic equilibrium during the design of VAV air supply duct system. In the air supply system with major design faults, the resistance adjusting measures including manual control dampers could be used to regulate the resistance distribution in the VAV terminal manifold ducts while the damper is in smaller opening degree frequently, in order to improve the regulation performance of the VAV terminals.