Briggs & Stratton 202826GS, Installation And Start-Up Manual

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1 BRIGGSandSTRATTON.COM
Fuel Consumption
Estimatedfuelsupplyrequirementsathalfandfullloadfor
naturalgasandLPvaporfuelsareshownbelow.
Fuel Pipe Sizing
Thetablesbelowprovidethemaximumcapacityofpipein
cubicfeetofgasperhourforgaspressuresof0.5psior
lessandapressuredropof0.3in.watercolumn.Specific
gravityofgasisshown.
Listedvaluescompensateforanominalamountof
restrictionfrombends,fittings,etc.Ifanunusualnumberof
fittings,bends,orotherrestrictionsareused,pleasereferto
federalandlocalcodes.
Required Propane Tank Size
Therequiredsizeofthepropanetankatvarious
temperatureswhenkeptatleasthalffullisshownbelow
inthechart.Giventhegaswithdrawalrateandthelowest
averagewintertemperature,aninstallercanspecifythe
requiredLPstoragetanksize.
Natural Gas LP Vapor
1/Load FullLoad 1/Load FullLoad
18kW 160C 93C N/A N/A
160,000B 93,000B N/A N/A
20kW N/A N/A 70.4C 141.5C
N/A N/A 176,85B 353,650B
C=Cubicfeetperhour
B=BTU’sperhour
NPT 10ft 15ft 20ft 30ft 40ft 50ft 60ft 70ft 80ft 90ft 100ft
3/4” 346 93 40 19 163 145 13 10 113 106 99
1” 653 549 446 360 307 74 50 30 11 197 187
Natural Gas Pipe Size - Gas Flow chart, in cubic feet per hour, specific gravity=0.65
NPT 10ft 15ft 20ft 30ft 40ft 50ft 60ft 70ft 80ft 90ft 100ft
3/4” 77 19 158 16 107 95 87 79 74 69 65
1” 48 360 93 36 0 180 164 151 139 19 13
Liquid Propane (LP) Gas Pipe Size - Gas Flow chart, in cubic feet per hour, specific gravity=1.50
Physical Properties LP Vapor Natural
Gas
NormalAtmosphericState Gas Gas
BoilingPoint(in°F):
Initial
End
-44
-44
-59
-59
HeatingValue:
BTUpergallon(NetLHV*)
BTUpergallon(gross**)
Cubicfeet(gas)
83,340
91,547
,500
63,310
1,000
Density*** 36.39 57.75
Weight† 4.4 .65
OctaneNumber:
Research
Motor
110+
97
110+
* LHV(LowHeatValue)isthemorerealisticrating.
** Grossheatvaluedoesnotconsiderheatlostintheformofwater
duringcombustion.
*** Densityisgivenin“CubicFeetofGasperGallonofLiquid”.
† Weightisgivenin“PoundsperGallonofLiquid”.
Withdrawal Rate 32° F 20° F 10° F 0° F -10° F -30° F -40° F
50CFH 115 115 115 50 50 400 600
100CFH 50 50 50 400 500 1000 1500
150CFH 300 400 500 500 1000 1500 500
00CFH 400 500 750 1000 100 000 500
300CFH 750 1000 1500 000 500 4000 5000