Fuel Conversion/Gas Connections
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Installation Guidelines for Air-Cooled Generators
5.4.3— Gas Installation Summary
Mistakes frequently occur when sizing gas pipe. A properly sized gas pipe is critical to the proper operation of the gen-
erator. The generator inlet size has no bearing on the proper gas pipe size. If using a piping method other than black
pipe, refer to local codes and the pipe manufacturer’s specifications for sizing and installation information.
IMPORTANT: Size the gas supply and pipe at 100% Load BTU / megajoule rating.
5.5 — Installing and Connecting Gas Lines
1.
Both natural gas and LP Vapor are highly volatile substances, so strict adherence to all safety procedures,
codes, standards and regulations is essential.
2.
Gas line connections should be made by a certified plumber familiar with local codes. Always use AGA-approved
gas pipe and a quality pipe sealant or joint compound.
3.
Verify the capacity of the natural gas meter or the LP tank in regards to providing sufficient fuel for both the gen-
erator and other operating appliances.
•
Fuel Regulator installed per laws or regulator manufacturer’s specifications
•
AGA approved gas pipe
•
Flexible fuel line
– Do not bend!!!
– Install horizontally
– Do not attach directly to generator
– Check all connections for leaks
•
Sediment trap near generator (if applicable or required by code)
•
Full flow rated shut-off near generator per local jurisdiction or code
4.
Most applications require an external manual shutoff valve on the fuel line.
Figure 5-2. Manual Shutoff Valve (A),
Accessory Valve with Manometer Port (B)
NOTE: The manometer port on the Generac accessory valve allows fuel pressure checks to be performed
without opening the generator enclosure.
A
B
