Fuel Pressure; Power Loss; Fuel Consumption (50Hz); Fuel Consumption (60Hz) - Briggs & Stratton 21114 Série Manuel D'installation Et D'opération

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Fuel Pressure

Fuel supply pressure at the generator fuel inlet port should
be 5 - 11 inch WC (13 - 28 mBar) at full load and with all gas
appliances turned on and operating. Maximum pressure
drop from static (engine not running) to full load is 0.5 inch
WC (1.3 mbar). Maximum pressure with engine OFF at no
load is 13.85 inch WC (34.5 mbar).

Power Loss

Engine power will decrease:
• 1.5% for every 10°F (5.6°C) above rated temperature
of 77°F (25°C).
• 2.5% for every 1,000 ft (305 m) above rated altitude
of 1,200 ft (366 m) above sea level.

Fuel Consumption (50Hz)

Shown below are the estimated fuel supply requirements.
Series 21114 LP Vapor Fuel Consumption
Full Load
BTU/hr
263000
ft³/hr
106
m³/hr
3.0
GAL/hr
2.9
Series 21114 NG Fuel Consumption
Full Load
BTU/hr
246000
ft³/hr
246
m³/hr
7.0
Series 25114 LP Vapor Fuel Consumption
Full Load
BTU/hr
275000
ft³/hr
110
m³/hr
3.2
GAL/hr
3.0
Series 25114 NG Fuel Consumption
Full Load
BTU/hr
288000
ft³/hr
288
m³/hr
8.2
16
1/2 Load
Exercise
174000
84000
70
34
2.0
1.0
1.9
1.0
1/2 Load
Exercise
161000
95000
161
95
4.6
2.7
1/2 Load
Exercise
170000
75000
68
30
2.0
0.9
1.9
0.9
1/2 Load
Exercise
175000
89000
175
89
5.0
2.6

Fuel Consumption (60Hz)

Shown below are the estimated fuel supply requirements.
Series 25014 LP Vapor Fuel Consumption
Full Load
BTU/hr
391000
ft³/hr
157
m³/hr
4.5
GAL/hr
4.3
Series 25014 NG Fuel Consumption
Full Load
BTU/hr
386000
ft³/hr
386
m³/hr
11.0
Series 30014 LP Vapor Fuel Consumption
Full Load
BTU/hr
483000
ft³/hr
194
m³/hr
5.5
GAL/hr
5.3
Series 30014 NG Fuel Consumption
Full Load
BTU/hr
444000
ft³/hr
444
m³/hr
12.6
Physical Properties
Normal Atmospheric State
Boiling Point (°F):
Heating Value:
BTU per gallon (Net LHV *)
BTU per gallon (gross **)
BTU per cubic feet (gas)
Density ***
Weight †
*
LHV (Low Heat Value) is the more realistic rating.
** Gross heat value does not consider heat lost in the
form of water during combustion.
*** Density is given in "Cubic Feet of Gas per Gallon of
Liquid".
Weight is given in "Pounds per Gallon of Liquid".
1/2 Load
Exercise
286000
158000
115
64
3.3
1.8
3.2
1.8
1/2 Load
Exercise
278000
144000
278
144
7.9
4.1
1/2 Load
Exercise
328000
154000
132
62
3.8
1.8
3.6
1.7
1/2 Load
Exercise
293000
146000
293
146
8.3
4.2
LP Vapor
Natural
Gas
Gas
Gas
-44
-259
83,340
63,310
91,547
2,500
1,000
36.39
57.75
4.24
2.65
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