RAMFAN VX700 Owner's Manual

Contents

RAMFAN VX700 Owner's Manual Manual pdf 5 page image

SM-VX700 Page 5 Rev. D3.0 PPV ApplicationPositive Pressure Ventilation is the process by which firefighters raise the static pressure inside abuilding to force smoke, fumes, or chemically contaminated air out of a structure to allow firefighters to complete salvage and overhaul operations in a less hazardous atmosphere.PPV fan applications require that a building have an entrance and an exit to support air flowthrough a structure to purge the structure of smoke and fumes. The VX700 PPV Fan puts out acone of air to seal and pressurize the structure at the entrance. If the entrance is not sealed bythe cone of air then some air will leak out around the door and the air pressure will drop throughthe structure, increasing the amount of time need to purge the structure of smoke and fumes.To achieve the proper air seal with a PPV fan and to maintain maximum pressure through thestructure the VX700 PPV Fan should be set back away from the entrance based on the size ofthe entrance as illustrated below.Please note that the CFM performance numbers printed below are based on an exit door roughlythe size of a 9' X 12' warehouse door.