Product Manual A

4. Installation7-2018

An older site might require upgrading and repair of the gas supply system.

Schedule an upgrade or repair to minimize power and gas supply

interruptions.

Make sure the full load fuel supply pressure at the inlet to the generator fuel

shutoff valves matches the requirements in the Model Specifications section.

Propane Fuel System

Propane vapor can be used as a primary fuel source or as a backup fuel source for

the generator sets with two independent fuel sources connected to the generator

set.

WARNING

Fuel leaks can lead to explosive accumulations of gas. Propane sinks in air

and can accumulate inside housings, basements, and other below-grade

spaces. Prevent gas leaks and the accumulation of gaseous fuel in the event

of a leak.

NOTICE

NFPA Standard No. 58 requires all persons handling and operating propane

to be trained in proper handling and operating procedures.

The required components in a propane vapor fuel system are as follows:

Component Description

Propane Tank Make sure to identify and utilize the correct tank size based on fuel flow

requirements and the lowest average temperature for your region. If the

tank is sized incorrectly, the generator set could run out of fuel. Refer to

the Minimum LPG Tank Size figure in the Fuel Line Selection appendix.

Shutoff Valve Useful during installation or in the event of a leak (may be required to

meet local codes).

Primary Regulator Located at the tank outlet, the primary regulator reduces the tank

pressure to the working pressure in the fuel supply line. Primary and

secondary regulators must be properly matched for a safe and functional

system. Consult with your propane supplier to ensure that the regulators

are properly sized.

Secondary

Regulator

Located near the generator set, the secondary regulator reduces the

higher line pressure to a working pressure of 6-13 inches of water

column (1.5 - 3.2 kPa). Higher pressure before the secondary regulator

is necessary to ensure that there is enough fuel available at the

secondary regulator for a fully loaded generator set.

Fuel Line Connects to the fuel supply. It must be sized properly using the propane

fuel line sizing charts (see the Fuel Line Selection appendix).

Installation must comply with all national, state, and local codes.