Natural Gas Pipe Sizing; Lp Vapor Pipe Sizing - Generac Power Systems 15 kW EcoGen Installation Manuallines

Natural Gas Pipe Sizing

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 meters / feet) 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.
Pipe Size
0.75 / 19
(in / mm)
15 kW —

LP Vapor Pipe Sizing

To determine correct LP vapor 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 meters / feet) allowed for the pipe sizes on
top. The pipe sizes are measured by inside diameter (ID)
to include any fittings, valves (must be full flow), elbows,
tees, or angles. Add 2.5 ft (0.76 m) per any bend, tee, or
angle in the pipe to the overall distance.
Pipe Size (in / mm)
15 kW
Installation Guidelines For 60 Hz EcoGen™ Generators
Table 5-1. Natural Gas Pipe Sizing
For 5–7 in of water column
(9–13 mmHg)
Allowable Pipe Distances (feet / meters)
1 / 25 1.25 / 32
20 / 6 100 / 30
Table 5-2. LP Vapor Pipe Sizing
0.75 / 19
20 / 6
NOTE: Add 2.5 ft (0.76 m) per any bend, tee, or angle in
the pipe to the overall distance. Tables based on
schedule 40 black pipe. If installing any other piping
system, follow the pipe sizing charts for the selected
piping system.
1.5 / 38 2 / 51
200 / 60 —
NOTE: Pipe sizes are using a second stage regulator.
NOTE: The minimum LP tank size is 250 gal (946 L),
unless unit calculations dictate use of a larger tank.
Vertical tanks, which are measured in pounds (or
kilograms), are permitted if properly sized for the
generator.
For 10–12 in of water column (19–22 mmHg)
Allowable Pipe Distances (feet / meters)
1 / 25
70 / 21
Fuel Conversion / Gas Connections
For 3.5–5 in of water column
(7–9 mmHg)
1 / 25 1.25 / 32
10 / 3 60 / 30
1.25 / 32
350 / 106
1.5 / 38
125 / 38
19