Firemans Override turns HVAC fans into smoke extraction units

Firemans Override: The new ABB ACH580 variable speed drive comes equipped with a “Firemans Override”, allowing the fire service to turn everyday HVAC fans in commercial and industrial buildings and tunnels, into potentially lifesaving smoke extraction units. This new feature will help consultants when designing functioning escape routes and strategies. What is firemans override? Firemans override is a switch or input that allows the fire service to take control of variable-speed drives controlling HVAC fans….