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AAp e� nd!x C HOW TO LOCATE THE POSITION OF THE 71 SO FOR COMPLETE SHUT-OFF AT A GIVEN TANK CAPACITY Note: This Appendix only applies when AHJ require- EXAMPLE ments call for complete shut-off at a given tank capacity. 1 . For an Owens-Corning Model G-3 Fiberglass" Tank See page 4 for standard measurements. Calibration Chart: The length of the upper tube and the placement of the Tank Capacity - 10,000 gal., nominal 9,403 gal. 7150 valve body determine the shut-off point. The sam - NOTE: Use actual capacity only ple calculation below will provide for complete shut-off at 95%. In all cases, the upper tube length must be a -Tape measure minimum of 6- 1 /2" plus the length of the riser pipe. All length measurements are in inches. INSTRUCTIONS { 1 . Find the tank capacity (in gallons) from the tank cali- bration chart provided by the tank manufacturer. miser Pipe with Face A 2 . Calculate 95% of capacity. Seat Adaptor t r ToTank 3 . Locate the 95 % volume number on the tank calibra- Top (t . o- ) ToiTantc 41 tion chart. 11 0 om 4. Find the dipstick number (X) which corresponds to MINIMUM the 95% tank volume . And, find the dipstick number (Y) which corresponds to the 100% volume. 5 . Subtract the dipstick number (X) from the tank diam- eter (Y) to find the upper tube reference number (Z). (Y) - (X) _ (Z) 2 . 95% of actual tank capacity = 0.95 x 9403 gal . _ 6. Add 1 .S " to (Z) to find the upper tube depth E. 8933 gal . (Z) + 1 .5 " = E 3 . The closest number which is less than 8933 gal . Is 7. Is E less than 6 - 1 /2" ? 8910 gal . Choosing the closest number less than 95% of actual capacity ensures that complete NO Upper tube length is E plus the distance from the shutoff will occur when the tank is no more than top of the Face Seal Adaptor installed on the riser 95% full , pipe to the inside, top lip of the storage tank (A) . Upper Tube Length = E + (A} 4. The calibration chart reading of 8910 gal . corre- sponds to a dipstick measurement of 82". =Upper models only, ending in "T" : 5 . Dipstick number (X) = 82" Length = E + (A) - 1 - 1 /2" Tank diameter (Y) = 92" (Y) - {X) = 2l (92 it 82" = 1011) YES Upper tube length is 61 /2" plus the riser pipe (Z) = 10" measurement (A) . 6. (Z) + 1 .5 " = E ( 10" + 1 .5 " = 11 .5 ") Upper Tube Length = 6-1 /2" + (A) E = 11 .5" 7. Is 11 .5 " less than 6- 1 /211 7 For testable models only, ending in "T" . NO Measure the distance from the top of the FSA-400 Upper Tube Length = 6-1 /2" + (A) - 1 -1 /2" Face Seal Adaptor installed on the riser pipe to the inside, top lip of the storage tank and obtain measurement (A) . NOTE: You must find the actual tank capacity num- Upper tube length = E + (A) ber that correlates to the 6-1 /2" + (A) depth for the station records . This number may also be used or For testable models only, ending in "T": the purposes of calibrating an electronic tank level Upper Tube Length = E + (A ) - 11 /2" system. 23 i i