AAF®-HermanNelson®Classroom Unit Ventilators©2002 AAF ® -HermanNelson ®Installation Manual IM 725Group: Unit VentilatorPart Number: 106506101Date: January 2002Vertical Floor Models AVS, AVV, AVB, and AVRHorizontal Ceiling Models AHF, AHB, AHV, and AHRBefore beginning installation, please read this publication in its entirety.Develop a thorough understanding before starting the installation procedure.This manual is to be used by the installer as a guide. Each installation is unique, only general topics are covered.The order in which topics are covered may not be those required for the actual installation.IMPORTANT!