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Natural Gas Generator Set Installation Manual-GF Series

Doc. 17855, Rel. 03/2014

3-2

3.1.4 Mechanical Connections

The generator set mechanical system installation

includes connecting the fuel, exhaust, ventilation and

cooling systems. Before starting any type of fuel

installation, all pertinent state and local codes must

be complied with and the installation must be

inspected before the unit is put in service.

IMPORTANT: All pipe threaded fuel system fittings,

including container fittings, must be assembled using

a pipe joint sealing compound designed for use with

natural gas or propane as applicable per industry

standards.

3.1.5 Base Drains (Optional)

Some units are equipped with drain extensions that

allow for oil or coolant (or both) drains to be brought

out to the base edge for convenient maintenance.

These drains have an in-line ball valve or Fumoto

valve installed for control. Factory drains require no

further installation at site.

3.2 Fuel System

These gensets can be equipped to operate on:

• Natural gas

• Combination of natural gas and propane (Dual

Fuel for select models)

In all fuel system installations, cleanliness is of the

upmost importance. Make every effort to prevent

entrance of moisture, dirt or contaminants of any

kind. Clean all fuel system components before install-

ing

3.2.1 Fuel Lines - Routing

A flexible fuel hose(s) or section of flexible fuel

hose(s) must be used between the engine’s fuel

system and fuel supply line to protect the fuel system

from damage caused by vibration, expansion and

contraction. Genset fuel supply line must be dedi-

cated supply line from utility.

CAUTION

Fuel leaks create fire and explosion hazards

which can result in severe personal injury or

death. Always use flexible tubing between engine

and fuel supply to avoid line failure and leaks due

to vibration. The fuel system must meet applica-

ble codes.

Installation of the fuel hose must be done according

to all applicable codes and standards, and installation

recommendations provided by the manufacturer. The

flexible hose used must be approved by the hose

manufacture for use with the genset fuel type and

product application.

Support fuel lines to restrain movement and prevent

chaffing or contact with sharp edges, electrical wiring

and hot exhaust parts.

CAUTION

Sparks and hot surfaces can ignite fuel, leading

to severe personal injury or death. Do not route

fuel lines near electrical wiring or hot exhaust

parts.

Fuel lines must be routed and secured per local, state

and national codes.

Install a dry-type fuel filter ahead of the service pres-

sure regulator to protect the sensitive pressure regu-

lating components and orifices downstream from rust,

scale and other solid substances carried along in the

gas stream.

3.2.2 Natural Gas/Propane Vapor/Propane Liquid

Fuel System (Dual Fuel System)

WARNING

Gaseous fuels are flammable and explosive and

can cause severe personal injury or death. Do not

smoke if you smell gas or are near fuel tanks or

fuel-burning equipment or are in an area sharing

ventilation with such equipment. Keep flames,

sparks, pilot lights, electrical arcs and arc-pro-

ducing equipment and all other sources of igni-

tion well away from genset and areas sharing

ventilation. Keep a type ABC fire extinguisher

handy.

WARNING

NFPA No. 58 requires all persons handling and

operating propane to be trained in proper han-

dling and operating procedures.

Gaseous-fuel supply system design, materials, com-

ponents, fabrication, assembly, installation, testing,

inspection, operation and maintenance must comply

with the applicable codes. See NFPA No. 37, No. 54,

and No. 58.

Most codes require both manual and electric (battery-

powered) shutoff valves ahead of the flexible fuel

hose(s). The manual valve should be of the indicating

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