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f <br /> Apaendix B <br /> 71 SO Overfill Valve in Tank Shut off level Worksheet <br /> Imroortarit.. This Is meant to be supplemental worksheet and not a substitute to f_ollow}ng the installation <br /> tninual instrucW6iis:-Ail le�h niiisuiements areTninc' es. Pleasecontact the Authority Having Jurisdic- <br /> tion(AHJ)and review local,state,and national codes to determine the regulatory requirements governing <br /> shut-off capacity in your region,as well as take Into account other considerations such as extreme tank tilt. <br /> Take the following measurements with the valve in- <br /> stalled in the tank: <br /> Distance from the 71 SO inlet tube flange to the cast <br /> lug in the 71 SO body(see figures),upper tube length. <br /> Note: the Upper Tube Length must be at least 16"to in- <br /> clude the protective bend in the tube. <br /> (o)= S ? s <br /> Distance from the 71 SO inlet tube flange to the top and <br /> bottom of lower tube,valve length. <br /> (W)__ (2 5 VVI (D) <br /> (U)= 12 G V tipper <br /> S Tube <br /> Distance from the 7150 inlet tube flan a the bottom <br /> of the tank. Note:If a tank bo rote oris present it <br /> may be necessary to add this thickness to dimension <br /> (OPW 6111 &61TP models add 0.6") (W}Valve <br /> (a)= / 32 <br /> Length, <br /> bottom of <br /> From the tank calibration chart provided by tank manu- cut <br /> facturer find the dipstick number(Y)which corresponds <br /> to the 100%volume, (8} <br /> (Y)= To Tank <br /> 1. To determine shut-off percentage: (Y) <br /> Subtract upper tube length(D)from distance to tank rank <br /> bottom(B) (U}Valve Chart <br /> 316, <br /> , Length, 100% <br /> (X}=(B)—(D)-2"_ �o 16top of cut <br /> Volume <br /> Dipstick <br /> Using the tank calibration chart provided by the tank - <br /> manufacturer determine the tank capacity at the cal- <br /> culated(X)dimension and the 100%volume(Y)tank } <br /> capacity. <br /> (X)tank capacity in gallons= f7 <br /> (Y)tank capacity in gallons= Z� <br /> SO%_(X)capacity/(Y)capacity xi 00= (o`a <br /> Note: The overfill valve must be installed per ARI require- <br /> ments and all applicable local,state,and national codes. If <br /> the overfill valve is set above the allowable shut-off percent- <br /> age the overfill valve must be removed and replaced. For <br /> reference 40 CFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum of 95%. <br /> 21 <br />