Description
The Field Controls 46282691 Post Purge Draft Control 80+FXD CK 91FV is used to control the combustion air draft following a burner shutdown in HVAC systems. It works on the detecting adverse pressure in the flue and keeping a draught at a controlled rate during a certain purge and shutting off when the safe conditions are achieved. It is installed in vent or draft hood connections and wired into the burner control circuit, and is used together with safety and combustion controls to control the flow of air.
