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+ lNSTALLATIQN lNSTRUCTIONS
<br /> ' ��� ,�,Q MODEL 825Y (3/4" - 2 "�
<br /> ; Reduced Pressure Backflow Preventer
<br /> assembly to avoid damage to ±he system or the assembiy
<br /> i .��._� causec! by system pressure. !n additicn, protection musi be
<br /> t•;� provided against the�mal water sxpansion, extreme
<br /> �- backpressure and water rammer.
<br /> ;r�
<br /> �,--� � 7. The Red:�ced Pressure Backflow preventer is subjeci to
<br /> � �'�� � damage if the i�rterna! water is allowed 4o freeze. The unit
<br /> � s.{,:�. .:� - must be protec#ed from freez+ng by using methods such as a
<br /> ..=4 hY hA�B� enclosure, insulation using heat tape, draining, or
<br /> � other suitable means. Howevsr, the unit must always be
<br /> � � accsssibie for testing and maintenan�e. Fnr rrtore
<br /> �"�`� irriormat�an on freaze protaction procedures, contact Febcc
<br /> for the Freeze Protection Service Instruction Sheet.
<br /> ,n.�-.cr�y,:.�s:^�r M��.,,>_�-.ror�nc.=�.r:.,°�-�`�:
<br /> ` ♦APPLICAZ`IUN fr , e. Most field probfems occur because dirt or debris is
<br /> �'"�'� �"""���"���`"� '�`��� � "�"` ��"����� present in the system at the t�me af installatiQn and becomes
<br /> The Febca Medel 825Y Re�uc2d Pressure Assembly is trapped in the first check seating area resu�ting in a
<br /> designed to prevent backflow o!contam�natsd wate� into the c�r,tinuous discharge from the relief vafve durirg a static or
<br /> potable water system due to backpressure and backflew condition. THE SYSTEM SHOUL� BE �LUSHED
<br /> backsiphonage. The Recuced Pressure Assembly is g�rORE THE ASSEMBLY !S iNSTALLED. !-iowever, to
<br /> acceptabie tcr use in instailations where the possiole ef�ective�y flush ihe assembly after it has been instalied,
<br /> corrtaminating matarial may be toxic or hazardrus!a health. removs both chacks and open the iNet shut-off and allow
<br /> Consult locaf codes bef�re instai�ing any backflow prevention watar to flow for a sufficient tims to flush debris from the line
<br /> assembty. Typical instalfations include services to industrial and assembly. If debris in the water system continues tc
<br /> piants, hospitals, morgu�s, martuaries, and chemicai plants. cause probiems, a strainer can be instafied up-strsam of the
<br /> They are also used in irrigation systems, boiler feed water assembly.
<br /> lines and other insta�lations requiring ma�cim�m protection.
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<br /> �IMEN�IION$ AND �VE3dHZ°S; �U.�. - iN�H��}
<br /> _. _ _ . _ _
<br /> �„_ ��.+rw�-�g+.w-�eMr^cfi�xr-c...:,��„�p�..,e..�._._ _ .. ...__ .
<br /> ,,�� i ZNSTALLATION 1 � Size � a� A*ov B i C D ! G ;��Lea'.
<br /> 1. The assembl shauld be instalfed in a horizantal osition ar, ,z �i� � ++ �r. I � s�+ i , ,�e a ,i. , � ve ,� ,�z
<br /> Y P -- }----1-----T-----�------
<br /> with the relieS valve on the side. Thera shouid be a minimum _�_ _?3_sie i, s�e t�3M _t � i!B 3 v, � . ,�a � ,z �n
<br /> 1 1/1 /4 iM �it 3i� T 3M � � 7/B � 3 1/1 �� ♦ i/b-'-----5�- .
<br /> af 12` betwasn the relief valve discharge port and fioor or ___ �______ ___ _ _______1_-____ _.._
<br /> -----
<br /> . . + ,n� ie ,j;-, t5 i�• ,o sia � s v, � , ,n � s ze v2
<br /> -
<br /> -- ---
<br /> grade, and a mirnmu^i of 18"honzarttaf ciearance around the ----z�------1----t------}----.----.------------
<br /> unit for access and ease of testing and maintenance ot the �e � ,s ,�z ,o sre � s ,r, � , ,r ; s I �
<br /> relief valve. Locai codes may not albw this ass�mbiy to be - - -
<br /> in�talled in a vertical position. Check local codes. ��M1���O���D WEIGHTB' (Metrie -zx�zn.�;
<br /> 2. Approval agencies typicalty do not recommend Size � eV A* ��, � B � C � D � E ;"E�wT.
<br /> instailation ot a Reduced Pressure Assembly in a pit. � 1 3,,.z ' �as.e i ,ee.s ,a.e a2.e ,a.e s.�
<br /> +--- -+-----
<br /> Flooding o! the pit c2n result in cress connection --rs - I--a.e-,-" zea.3 ,ee.e � .a.e ez.e iw.a-� s.i
<br /> ---1---- ---�----1--- ---{------
<br /> - ----
<br /> -- —- --- ------ ---
<br /> ccntamination. If locaf codes permit instailation of a so ae�.o sse.5 ,se.e , ,o..e az.e � ,os B � e.,
<br /> ---- -- -------
<br /> . . r------ ------r------
<br /> ----- ------
<br /> Re�uced Pressure Assembly in a pi?, adequate drainage _ .o_ .es.e � sa�., see.e ,�.. ,,,.3 � ,Z�.o ,z.o
<br /> must be provided to prever�t the pit from flooding under so aas.e-F 3B3J ? zae.a ;a�.a ,,,.3-} iz�.c is.o
<br /> maximum discharge conditions. �• BV Is approximat�I�nAth with Ball Va1w S�ut-Off�.
<br /> A• GV If�pDroKimats I��gth with G�l�Valw Shut-Offf.
<br /> 3. The assembly should be ptaced where water discharge All dim�nsions u�app�oximau.
<br /> from the relief port will not be objectionable. �
<br /> 4. To be approved by the University of Southem Calitomia � �—e
<br /> Founda;ion for Cross-Connection Control and Hydraulic � �
<br /> Research (USC FFCCC 8� HRj, the assembiy must be � �� �
<br /> urchased and instalMed with resilient seated shut-offs to s�a. �� �
<br /> n surs bubble ti ht closure tor more consistent results during v�'"' ��\ � i i
<br /> 9 � ,
<br /> testing. CAUTION: Open ana close resiMient seated shut-offs j �', �
<br /> s(owiy to prevent water hemmer damage to the system and/or
<br /> assembry. - ,
<br /> 5. The Febco Reduced Pressure Assembly is designed to be
<br /> serviced while in line.Straight union connections betwean the
<br /> sh�t-off vaMes are not recommended since the unit should �
<br /> not be removed from the system dur�ng servicing. ,1,�,°w �
<br /> 6. Insure that the supply water pressure does not exceed the I f�` � �
<br /> manufacturer's maximum water prassure reting oi the �
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