Fuel Conversion; Fuel Requirements And Recommendations - Generac 20 kW Synergy Guia De Instalacion

Fuel Conversion/Gas Connections
Section 5
5.1 — Fuel Conversion
Although the generator is configured at the factory for operating on natural gas, provision is made to switch over to LP
Vapor.
NOTE: The fuel selection (NG/LP) can be changed using the Installation Wizard at initial power up, or by
accessing the EDIT Menu thereafter.
NOTE: The orange fuel conversion knob is located on the engine at the top of the fuel mixer.
To change fuel selection, rotate fuel conversion knob to the desired fuel source (in the direction of the arrow) until it
stops. Fuel knob rotates 180° and slides into mixer body when converting to LP gas.
NOTE: If experiencing difficulty turning knob to LP position, lightly tap on knob before turning. Do not use a
pliers!
Figure 5-1. Fuel Conversion Knob
(As Viewed From Generator Air Box Side)
5.2 — Fuel Requirements and Recommendations
With LP gas, use only the vapor withdrawal system, which uses the vapors formed above the liquid fuel in the storage
tank.
The engine has been fitted with a fuel carburetion system that meets the specifications of the 1997 California Air
Resources Board for tamper-proof dual fuel systems. The unit will run on natural gas or LP gas, but has been factory
set to run on natural gas. Should the primary fuel need to be changed to LP gas, the fuel system needs to be reconfig-
ured. See the Fuel Conversion section for instructions on converting the fuel system.
Recommended fuels should have a Btu content of at least 1,000 Btus per cubic foot (37.26 megajoules per cubic
meter) for natural gas; or at least 2,500 Btus per cubic foot (93.15 megajoules per cubic meter) for LP gas. Ask the fuel
supplier for the Btu content of the fuel.
NOTE: Required fuel pressure for natural gas is 3.5-7 inches water column (7-13 mm mercury). Required fuel
pressure for LP vapor is 10-12 inches water column (19-22 mm mercury).
NOTE: The primary regulator for the propane supply is NOT INCLUDED with the generator.
Installation Guidelines for Air-Cooled Generators 19