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Appendix C HOW TO LOCATE THE POSITION OF THE 7150 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`s 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 . 71 SO 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 & 1 /2 " plus the length of the riser pipe . All length measurements are in inches . t INSTRUCTIONS ?, 1 . Find the tank capacity ( in gallons) from the tank cali - bration chart provided by the tank manufacturer. Riser Pipe with 2 . Calculate 95 % of ca acit . Sea Face Sea (A) tor p y l AdapTo Tank 3 . Locate the 95 % volume number on the tank calibra - Top (t D i (13 ) To Tank tion chart. i Bottom 4. Find the dipstick number (X) which corresponds to the 95 % tank volume. And, find the dipstick number (Y) which corresponds to the 100111% 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 . 5 " 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 "7 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, tap lip of the storage tank (A) . Upper lube Length = E + (A) 4. The calibration chart reading of 8910 gal . corre- sponds to a dipstick measurement of 82". For testable models only, ending in "T" ; 5 . Dipstick number (X) = 82" Upper Tube Length = E + ( A ) — 11 /2 " Tank diameter (Y) = 92" (Y) - (X) = (Z) (92 "- 82" = 1011) YES Upper tube length is 6- 1 /2" plus the riser pipe (Z) = 10" measurement (A) . 6. (Z) + 1 .5 " = E ( 10" + 15' = 11 .5 " ) Upper Tube Length = 6- 1 /2" + (A) E = 11 .5 " 7. is 11 .5 " less than 60,m1 /2 " 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 - U2° 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) - 1 -1 /2 " system . 23 i i