Fuel Consumption; Fuel Line Sizing; Natural Gas Pipe Sizing - Generac Power Systems EcoGen G0061030 Installation Manuallines

Fuel Conversion/Gas Connections

Fuel Consumption

Generator
15 kW EcoGen
3
* Natural gas is in ft /h [m
3
** LP is in gal/h [l/h] [ft
*** Values given are approximate
These are approximate values. Use the appropriate spec sheet or Owner's Manual for specific values.
Verify that gas meter is capable of providing enough fuel flow to include household appliances and all other loads.
NOTE: The gas supply and pipe MUST be sized at 100% load BTU / Megajoule rating.
Always refer to the Owner's Manual for the proper BTU, Megajoule and required gas pressures:
Natural Gas:
3
BTU = ft /h x 1000
3
Megajoules = m

Fuel Line Sizing

Selecting the correct size fuel line is crucial to the proper
operation of the unit. The generator inlet size has no
bearing on the size gas pipe to be used.
For further information refer to NFPA 54 for NG or NFPA
58 for LP.
Measure the distance from the generator to the gas
source.
IMPORTANT NOTE: The generator should be plumbed
directly from the source, not off the end of an existing
system.
Table 5.1: Natural Gas Pipe Sizing
Pipe Size
0.75 / 19
(in / mm)
15 kW
—
EcoGen
18
Natural Gas
1/2 Load Full Load
128 / 3.63 302 / 8.55
3
/h]
/h]
Liquid Propane Vapor:
/h x 37.26
For 5–7 inches of water column
(9–13 mm mercury)
Allowable Pipe Distances (feet / meters)
1 / 25 1.25 / 32
20 / 6 100 / 30
1/2 Load
1.28 / 4.85 / 47.61
3
BTU = ft /h x 2500
3
Megajoules = m /h / hour x 93.15
NOTE: When measuring the pipe length, add 2.5 ft (0.76
m) for every angle or bend in the pipe to the overall
required length of pipe needed

Natural Gas Pipe Sizing

Tables based on schedule 40 black pipe.
To determine correct gas pipe size, find the kW rating of
the generator in the left column, and trace to the right.
The number to the right is the maximum length
(measured in feet [meters]) allowed for the pipe sizes on
top. Pipe sizes are measured by inside diameter (ID) to
include any fittings, valves (must be full flow), elbows,
tees or angles.
1.5 / 38 2 / 51
200 / 60
Installation Guidelines for 60 Hz EcoGen™ Generator
LP Vapor
Full Load
2.62 / 9.92 / 104.4
For 3.5–5 inches of water column
(7–9 mm mercury)
1 / 25 1.25 / 32 1.5 / 38
10 / 3 60 / 18 125 / 38