Siemens SG020 owner manual ‹ Fuel Requirements, ‹ Natural GAS Fuel System

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Standby Generator Sets

Fuel Systems

FUEL SYSTEM

‹FUEL REQUIREMENTS

The standby generator may be equipped with one of the following fuel systems:

Natural gas fuel system

Propane vapor (PV) fuel system

Recommended fuels should have a Btu content of at least 1,000 Btus per cubic foot for natural gas; or at least 2,520 Btus per cubic foot for LP gas. Ask the fuel supplier for the Btu content of the fuel.

Required fuel pressure for natural gas is 5 inches to 14 inches water column (0.18 to 0.5 psi); and for liquid propane, 5 inches to 14 inches of water column (0.18 to 0.5 psi).

NOTE:

Any piping used to connect the generator to the fuel supply should be of adequate size to ensure the fuel pressure NEVER drops below five inches water column for natural gas or 5 inches water column for propane vapor for all load ranges.

NOTE:

It is the responsibility of the installer to make sure that only the correct recommended fuel is sup- plied to the generator fuel system. Thereafter, the owner/operator must make certain that only the proper fuel is supplied.

‹NATURAL GAS FUEL SYSTEM

Natural gas is supplied in its vapor state. In most cases, the gas distribution company provides piping from the main gas distribution line to the standby generator site. The following information applies to natural gas fuel systems.

Gas pressure in a building is usually regulated by national, state and local codes.

To reduce gas pressure to a safe level before the gas enters a building, a primary regulator is needed. The natural gas supplier may or may not supply such a regulator.

It is the responsibility of the gas supplier to make sure sufficient gas pressure is available to operate the primary regulator.

Gas pressure at the inlet to the fuel shutoff sole- noid should not exceed approximately 14 inches water column (0.5 psi). Optimum pressure at the fuel shutoff solenoid is 11 inches water column (0.4 psi).

‹PROPANE VAPOR WITHDRAWAL FUEL SYSTEM

This type of system utilizes the vapors formed above the liquid fuel in the supply tank. Approximately 10 to 20 percent of the tank capacity is needed for fuel expansion from the liquid to the vapor state. The vapor withdrawal system is generally best suited for smaller engines that require less fuel. The installer should be aware of the following:

The natural gas and LP gas systems are similar. However, the natural gas system delivers gas at a pressure of approximately five inches water col- umn to the carburetor.

When ambient temperatures are low and engine fuel consumption is high, the vapor withdrawal system may not function efficiently.

Ambient temperatures around the supply tank must be high enough to sustain adequate vaporiza- tion, or the system will not deliver the needed fuel volume.

In addition to the cooling effects of ambient air, the vaporization process itself provides an additional cooling effect.

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Contents SG020 Series 1.6L 20kW Standby Generator Sets Table of Contents  Warning   Electrical Hazards  ‹ HOW to Obtain Service ‹ Operation and MaintenanceAuthorized Service Dealer Location Introduction‹ Data Label Identification RecordEquipment Description Engine OIL RecommendationsCoolant Recommendations Engine Protective Devices Fuel System ‹ Fuel Requirements‹ Natural GAS Fuel System Specifications ‹ Cold Weather KIT ‹ Reconfiguring the Fuel System‹ FOUR-LEAD, SINGLE-PHASE Stator Alternator Power Winding Connections‹ 3-PHASE Alternators Generator AC Lead ConnectionsInstallation Preparation Before START-UPInitial Inspection for Genset Startup ‹ Preparation for START-UP START-UP ChecklistGenerator Control Operation Operating Unit with Manual Transfer Switch‹ Engine START-UP and Transfer ‹ Retransfer and ShutdownMaintenance Performed by Service Facilities Cooling SystemChecking Fluid Levels Maintenance Owner Operator can Perform ‹ Changing the Engine AIR Cleaner ‹ Coolant Change ‹ Changing Engine OIL‹ Spark Plugs Miscellaneous Maintenance Service Maintenance Interval Information Service ScheduleLevel Maintenance Level Problem Cause Correction Troubleshooting GuideStandby Generator Sets Standby Generator Sets Standby Generator Sets Standby Generator Sets Page Breaker Tray BACK/BOTTOM Page Assy RTR 20KW 2PH Page Components Included in 0G1291E Page Support Radiator LH Side Page Battery Tray C1 CPL Page Mounting Base 1.6L Page Engine Generac 1.6L NG Page ASM Motor Stepper Page Elbow 90D 3/4 NPT Page Roof C1 CPL Page Muffler C1 Page Page Page Page Page Page Page Page Page Page Page Page Page Page Standby Generator Sets Warranty

SG020 specifications

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The SG020 stands out as a flexible and efficient solution for delivering renewable energy. With its advanced technologies, robust design, and commitment to sustainability, it represents Siemens’ ongoing pursuit of innovation in the energy sector, paving the way for a more sustainable future in power generation.