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� <br /> .n.... ,: _ . .::,,- ---,m-,- � �x;,q;,�--;,�,�,� <br /> , �,:1' ' � <br /> �`=� � � � � HILL R�Ff�IGERATION CORPO�iATION <br /> AFFILIATEO WITI{ HILL flEFRIGERATION OIVISION EMHART GORPORATION <br /> ].0�30�3 430 EIGHTH AVENUE NORTH • SFATRE.WASHINGTON 98109 • (206) 62��4851 <br /> Mr. Bill Serr <br /> 7/11 Stores <br /> 1414 Dexter Ave. North,Suite 306 <br /> Seattle, Washington 98109 <br /> Reference: 7/11 #14383, Everett, Washin6ton <br /> Dear Bill: <br /> At your request, I will summarize the steps taken to reduce , <br /> the sound level of the refrigeration machinery at 7/11 <br /> Store �14383. <br /> On November 8, 1972, we changed the method of refrigeration <br /> control to reduce the on-off cycling of the refrigeration <br /> equipment. This was done to reduce the frequent change in <br /> sound level, which cai� be disturbtng. <br /> On November 20, 1972, we cunstructed a sound baffle to <br /> further confine the equipment noise to the machine room. <br /> There are certain limitations on the baffling that had to be <br /> maintained, in as much as it is necessary that air be allowed <br /> to enter and leave the room for cooling of the e uipment. <br /> If we had completely enclosed the room, it would have been <br /> necessary to provide mechanical exhaust fans, which would <br /> have introduced sound, <br /> The air conditioning unit on the roof was also contributing <br /> to the sound level as a result of the deterioration of L•he <br /> bearings and shaft assembly. These items were changed on <br /> November 17, 1972 to reduce the sound level of this equipment. <br /> Prior to the time we assumed the service of your account, <br /> mufflers had been installed on the refrigeration units, • <br /> which initially reduced the sound level of this equipment. <br /> Discussions were held regarding the advisability of L-aking <br /> sound level measurements before and after, making the above <br /> described modification; however, it was decided that the <br /> problem taas relatively routine and that routine procedures <br /> would solve it. <br /> Should you have any additional questions or require further <br /> information, please give me a call. <br /> Very truly yours, <br /> H�ILL R-E G RATION <br /> •� J e,-,�a.._.-e�' � '�'�r �':: <br /> �� � <br /> Don Davidson, Branch Manager „qy,,,�., <br /> ;�:'i <br /> � THE BEST IN FOOD 6TORE REFRI6ERATION � V�z' ;,� „ _ <br /> DD/pd �� :.;,,;.. ;~,: �.. ..,. <br />