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M • <br /> ' � •\ <br /> ��SEL-ECiTON PR�CEDt�E , <br /> a Determine pamp npadtp: <br /> t. Minimum suggested is 600 gallons pe:hovr(10 gpm)bo stay ahead oE ' <br /> watet t�se rate. <br /> 2. Maxinnun sug�;es�ed for ddivery e�a drop box oE a hoene sysdem is 2,700 <br /> gallons per ho�a t4s g�pm)to peevent baild-up oE pee�s�u+e in drop box. <br /> 3. U�e vatue froa�de�ign of pnessure distiibudon systea�. <br /> SELECTL=D PUII�CAPAQTY�apm p��� <br /> B.Dehaadne head seqniremml� . Pbi�e[Diseh� <br /> l. Elevado�n�betvree�puasp and point oE diul�arge. �"�r"_ �� <br /> ���� F1�►�daa Dl�es <br /> Z If pumpirg to a peess�u+e di�'butlon sy�,uid live feet for pre�utre a,?.. .n <br /> tequired at aunifoid <br /> ��� Rlab <br /> 3. Frktlon loss � � i�r.:�:�.r�� <br /> a. F.nter fricdon loa�tabk with apRn and pipe dis�neeer. <br /> Read frlctlOn lo�in feet per 100 feet f!'ont page F-18. l0 0.69 0.20• <br /> F.L� a. fti/100 k of 12 0.96 0.� <br /> -�-�-� �� . •14 1.ZS 0.35 , <br /> ' b. Determine total plpe let�gth Et�oet pa�np to d�sctttarge 16 1.63 0.4s <br /> point Add?S peraent to ptpe lee►gth for fltdng , la 203 0.60 <br /> ����y��� ��� 20 Z4� 0.73 0.11 <br /> � ���t�� 2S 3.)3 1.11 0.16 <br /> lengd►-1.2s timd ptpe krgth• 3o s.23 l.ss o.z3 <br /> '►q=x 1.25�• ���ri`_Eeet <br /> c. Calcniate totai fricti�on loss by inuttiptyirg ,i�s ii.� 3t.?�.� o a <br /> h r i c d o a l a�in h/1 0 0 R b y e q u i v a len t p ipe lengt h. SO 3.99 O.SB <br /> Total friction loas• �;_x -%. .=100=_�_feet SS � 4.76 0.70 . <br /> 4. Total lusd required i�the suu�of devadon diEfere�ce, � � 6 0 s.6 o O.E 2 • <br /> special head requir�e�b,and total frictlan lo�s. � <br /> _�..+=+�_ <br /> � ti) W (3v <br /> TOTAL HEAD � �feet . <br /> G Pnmp selecdon D-7 <br /> 1. A pump must be edecbed to deliver at least �� gpm (Step A)with at lesst <br /> �„L ket of total hmd(Step B). Q^"M*m �� �M�a+on. �a on� <br /> w�oe Tr.s a. �ts�eeras <br /> t a � Q <br /> D. Total Pnmpont Volnme ' s � � �� � <br /> 1. To maxinuu pump itfe xlect sua+p s�ze for 4 to 5 pump operadors per day. . : � � _� .;� <br /> -�.-SPd+4= I s �� gallon�per dose s �o ,eo �. .��, <br /> 2. Calcvlate drainbacic i �o'o � a� � <br /> 1. Determine total pipe ltngth, ' ^ feet. • �mo rr� .o� e.w,,.,, <br /> 2. Determine liquid wlume of pipe,��,gallon�per 100 feet. (xe page R18) F•18a <br /> 3. Multiply length by whm�e: Drainback quantlty� � f Ga�em 10o tee� <br /> � � Eeet x�_gallans/100 f���8allon�• 4 <br /> •Suggaced drainbaek quanHty is 10 perce�t oE pua�ped qwaHty. A larger dr,inback 1.25 7.7•� <br /> percanage wiil d�pump seadon effldenry�lightly but pumping�nvgy cosb are <br /> usually a reiatively small part of the total houxhold energy coses. 1.5 1�.s8 <br /> 2 17.43 <br /> 3. Total pump out wlume equais dose volume+dniaback Z,� 24 87 <br /> �gallons per aose+ � '- gallons s I � 4 Total Gallons 3 38.4 <br /> 4 66.1 • <br />