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08/19/2004 08:09 425-771-7956 ROhEI<�INC <br />os�lo/01 7116 Lo:01 RAT YSo 687 76�6 � 6YC/�A�'{'8 <br />/9»'r� L-Ui'r•y �/�^S'— 77/_ 79SG <br />�a s� a s�- p��'� <br />��I-r, ° 1�a/v lo� <br />August 10, 2004 <br />To: <br />Subject: Potable Water Supply Back Flow Proventlon Dssign <br />Manitowoc Ice Mechinss <br />PAGE 01 <br />�001 <br />��� <br />���a� <br />Manitowoc ice mechines are "NSF/ANSI 12 Automatic Ice Making Equipment" listed, <br />One of the requirements of N9F liated ice machines is back flow prevention of the <br />potsble water syatem. Intemnl to all I�tanitoww lce Macbiu�e� is an air-gap between the <br />inlet waser fitting and lhe water level in the nservoir; this is the design that meets the <br />standard and creates the back tlow prevention. To receive NSF approvel the design must <br />meet this requirement. <br />Iiback S��w prevecrtlon is requirod on the water-cooled condenser water circuit, it will <br />need to be added externally to the Ice Machipe by the installer. <br />All ths ice machines, llsted by manufachtt�a name, which meet this NSF 12 standard can <br />be can bc acceesed on the NSF web site at Nrww.nsf.or¢. <br />Barry Hctt <br />Regional Servioe Msn�er <br />Manitowoc Ice Inc. <br />A@/�AwKp�w�r <br />