Generac Power Systems Protector Series

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Gaseous Fuel Systems

18 Installation Guidelines For Spark-Ignited Stationary Generators

Figure 4-1. Typical NG System

009908

A Manual fuel shutoff valve C Primary regulator

B Sediment trap D Flexible fuel line

Main Page

Table of Contents3
Section 1: Safety Rules & General Information5
Introduction5
- Read this Manual Thoroughly5
Safety Rules5
- How to Obtain Service5
General Hazards6
Exhaust Hazards7
Electrical Hazards7
Fire Hazards7
Explosion Hazards8
Lifting Hazards8
Battery Hazards8
General Rules9
- Before You Begin9
- Standards Index10
Section 2: Installation Planning11
Introduction11
Unit Drawings11
- Installation Drawings11
- Wiring Diagrams11
Receiving11
- Receiving and Unpacking11
- Inspection11
Storage before Installation11
- Long Term Storage11
Generator Location12
- General Location Guidelines12
- Weather Considerations12
Section 3: Site Selection and Preparation13
Site Selection13
Carbon Monoxide13
- Carbon Monoxide Detectors13
- Potential CO Entry Points14
- Protect the Structure14
Fire Prevention15
- Distance Requirements15
- Fire Codes, Standards, and Guidelines16
- Generator Maintenance16
Fresh Air for Ventilation and Cooling17
Water Ingress Avoidance17
Proximity to Utilities17
Transportation Recommendations17
Site Preparation17
- Generator Foundation17
- Concrete Pad17
- Dimensions17
- Stub-Up Area18
Mounting18
- Fixed Foundation18
- Connections18
Placement on Roofs, Platforms, and Other Supporting Structures18
Section 4: Gaseous Fuel Systems19
Fuel Requirements and Recommendations19
- BTU Content19
- Fuel Pressure19
Fuel System Conversion19
Gaseous Fuel Properties19
- Natural Gas19
- Liquid Propane Gas20
Definitions20
Gaseous Fuel Systems21
- NG System21
- Flexible Fuel Line21
- Primary Regulator Outlet21
- LP Gas System23
- Sediment Trap23
Fuel Pressure Regulators24
- General24
- Best Practices24
- Operating Fuel Pressure24
- Engine Fuel Consumption24
- Fuel Pressure Regulator Sizing25
- Recommended Fuel Pressure Regulators25
- Primary Fuel Pressure Regulator25
Pipe Sizing Considerations26
- General26
Sizing LP Tanks for LP Gas Withdrawal27
Final Operating Test30
- Fuel Shutoff Valve30
- Fuel Pressure Test Port Location30
- Final Test Procedure31
Section 5: Electrical System33
General Information33
Connecting Generator Feeder Conductors33
Connecting Control Circuit Wires34
Removing Rear Panel and Stub-Up Cover34
Typical Load Leads and Control Wiring in Stub-Up34
Customer Load Wiring34
Control Wiring Connections35
- RTS Series Transfer Switch with T1 Fuse/Connection35
- Two-Wire Start36
Optional Accessory Power37
Installing Stub-Up Cover and Rear Panel37
Transfer Switch Location37
Battery37
- General Safety Precautions37
- Battery Requirements38
- Battery Installation38
Section 6: Control Panel Startup / Testing39
Control Panel Interface39
- Using the AUTO/MANUAL/OFF Buttons39
Generator Setup39
- Setting the Exercise Timer39
Before Initial Startup39
- Install Wizard39
- Interconnect System Self Test Feature39
- Before Starting, Complete the Following40
Activate Unit42
Checking Manual Transfer Switch Operation43
Operational Checks43
- Electrical Checks43
- Testing Generator under Load43
- Testing Auxiliary Shutdown Switch Operation44
- Checking Automatic Operation44
Installation Summary44
Shutting Generator down While under Load or During a Utility Outage45
Section 7: Installation Checklists47
Safety Checklist47
Installation Planning Checklist47
Foundations and Mounting Checklist47
Ventilation System Checklist48
Exhaust System Checklist48
Gaseous Fuel System Checklist48
Electrical System Checklist49
Section 8: Troubleshooting/Quick Reference Guide51
Troubleshooting51
Quick Reference Guide52
Section 9: Accessories55
Section 10: Installation Drawings57
A0000293718 Rev B Page 1 of 257
A0000293718 Rev B58
Three-Phase Alternators ("Y" Configuration)59
Alternator AC Lead Connections59
Four-Lead, Single-Phase Stator59
Alternator Power Winding Connections59
Three-Phase Alternators ("Delta" Configuration)60
Alternator Wiring Diagram61

Generac Power Systems Protector Series

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