Generac Power Systems Stationary Emergency Generator Installation Manual
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Generac Power Systems Stationary Emergency Generator Installation Manual

Stationary emergency generator
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Installation Manual

Stationary Emergency Generator

Not intended for use in critical life
support applications.
OUTDOOR INSTALLATION ONLY
This manual should remain with the unit.

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Summary of Contents for Generac Power Systems Stationary Emergency Generator

  • Page 1: Stationary Emergency Generator

    Installation Manual Stationary Emergency Generator Not intended for use in critical life support applications. OUTDOOR INSTALLATION ONLY This manual should remain with the unit.

  • Page 2: Table Of Contents

    Table of Contents INTRODUCTION ............... 1 INSTALLATION ..............16 Read this Manual Thoroughly ........1 Transfer Switch ............16 How to Obtain Service ........... 1 Unpacking ..............16 SAFETY RULES ............... 2 Mounting..............16 GENERAL INFORMATION ............4 OPERATION ................16 Generator Installation .............

  • Page 3: Introduction

    Introduction INTRODUCTION These safety warnings cannot eliminate the hazards that they indicate. Common sense and strict compliance with the special Thank you for purchasing this model of the standby generator instructions while performing the action or service are essential to set.

  • Page 4: Safety Rules

    Safety Rules Save These Instructions – The manufacturer suggests that these rules for safe operation be copied and  posted in potential hazard areas. Safety should be stressed to all operators, potential operators, and ser- vice and repair technicians for this equipment. Save These Instructions –...

  • Page 5: Fire Hazards

    Safety Rules FIRE HAZARDS • If people must stand on metal or concrete while installing, operating, servicing, adjusting or repairing this equipment, place insulative mats over a dry wooden platform. Work on the • Keep a fire extinguisher near the generator at all times. Do NOT equipment only while standing on such insulative mats.

  • Page 6: General Information

    General Information GENERATOR INSTALLATION This equipment is a liquid-cooled, engine-driven generator set. The After the system has been installed, do nothing  generator is designed to supply electrical power that operates criti- that might render the installation in noncompli- cal electrical loads during utility power failure. The unit has been ance with such codes, standards and regula- factory-installed in a weather resistant, all metal enclosure and is tions.

  • Page 7: Generator Location

    General Information GENERATOR LOCATION The unit must be positioned so air vents won’t become clogged with leaves, grass, snow or debris. Make sure that exhaust fumes Install the generator set, in its protective enclosure outdoors, will not enter the building through eaves, windows, ventilation fans where adequate cooling and ventilating air always is available.

  • Page 8: Unpacking

    General Information GENERATOR PLACEMENT Figure 1.3 — Combustible Floor and Roof Protection Use a forklift, boom truck or similar equipment with sufficient SHEET METAL capacity to move the generator to the mounting pad area. The operator should be certified and experienced in generator instal- lation (Figure 1.4).

  • Page 9: Fuel Systems

    General Information Local fuel gas codes may vary widely. For that reason, it is recom- After checking all connections for leaks, check the static gas mended that a local gas distributor or installer be consulted when pressure at the secondary regulator to ensure there is sufficient installing a gaseous fuel supply system.
  • Page 10 General Information 1.8.4 THE NATURAL GAS SYSTEM 1.8.6 GASEOUS FUEL SYSTEM PIPING A typical natural gas system is shown in Figure 1.10. The maxi- NOTE: mum pressure at which the gas can enter a building is established The information below is to assist in planning gaseous fuel by code and may vary from area to area.
  • Page 11 General Information Figure 1.10 — Typical Natural Gas System Generator Base Gas Actuator Primary Regulator (Supplied by Installing Contractor) Fuel Shutoff/Regulator Assembly Flex Fuel Line (Supplied 11 - 14” Water Column with Unit) Recommended (> = 70kW) 5 - 14" Water Column Recommended (<...

  • Page 12: Calculating Volumetric Flow Rate And Pipe Size

    General Information CALCULATING VOLUMETRIC Thus: FLOW RATE AND PIPE SIZE 91.34  — • If the Owner's Manual identifies the fuel consumption requirements 0.0356 by a volumetric flow rate (units of ft /hr), skip the next section and go on to the section, Calculating Pipe Size. If the Fuel Consumption And: requirements are given in units of lb/hr, follow the next section, Calculating Volumetric Flow Rate.
  • Page 13 General Information TABLE 1 Specific Specific Multiplier Density lb/ft Multiplier Density lb/ft Pressure Drop Multiplier Gravity(1) Gravity(1) 0.0383 0.775 0.0765 0.577 0.55 1.04 0.0421 0.707 0.0918 0.815 0.0459 0.655 0.1072 0.65 0.962 0.0497 0.633 0.1148 1.29 0.926 0.0536 0.594 0.1301 1.83 0.867 0.0612...
  • Page 14 General Information TABLE 3 — VAPOR CAPACITY OF PROPANE STORAGE TANKS To Use: Go to the First column and pick the required kW load and then pick the minimum ambient temperature (40º, 20º or 0º F) that the generator would be operating in. The third column (tank capacity) will give the required tank size to continually produce the given fuel flow. Operating Max kW Minimum...

  • Page 15: 1.10 Electrical Connections

    General Information 1.10 ELECTRICAL CONNECTIONS Figure 1.13 — Battery Charger Connection 1.10.1 GROUNDING THE GENERATOR A GROUNDING LUG is provided on the generator mounting base for the purpose of grounding the frame and the external electrically conductive parts of this equipment to an approved earth ground and/or grounding rods where required by the National Electrical Code (Figure 1.12).

  • Page 16: 1.12 Generator Activation

    General Information The battery represents a risk of high short  Figure 1.14 — Check Engine Oil circuit current. When working on the battery, always remove watches, rings or other metal objects, and only use tools that have insulated handles. 1.11.1 VENTED BATTERIES The electrolyte is a dilute sulfuric acid that is...

  • Page 17: Activation Chart

    General Information 1.12.1 ACTIVATION CHART CHOOSE LANGUAGE TROUBLESHOOTING Display Reads: Use ARROW keys to scroll to desired language. If the wrong language is chosen, it can be Press ENTER to select. changed later using the “edit” menu. Language English Escape Enter Display Reads: Press ENTER to begin the activation process.

  • Page 18: Installation

    Installation TRANSFER SWITCH BASIC STANDBY ELECTRIC The generator system should be used in conjunction with a SYSTEM matched automatic transfer switch. The NEMA 3R enclosure is Figure 3.1 shows a schematic diagram of a basic standby electric weather proof and can be used indoors or outdoors. system.

  • Page 19: Total Circuit Isolation Method

    Operation Figure 3.2 — Total Circuit Isolation The generator powers only designated loads that are grouped together and wired into a separate emergency distribution panel. The transfer switch is installed between the main distribution panel (A) and the emergency distribution panel (E) (Figure 3.1). The amperage rating of the transfer switch must be equal to, or greater than, the highest amperage rating of the utility and genera- tor breakers feeding the switch.

  • Page 20: Nexus Transfer Switches

    Operation CONNECTION DIAGRAMS Figure 3.4 — Match Phase Rotation All wiring in the standby electric power system must be in strict compliance with applicable codes, standards and regulations. Such wiring must be properly supported, routed, and connected. In addition, wiring must be properly sized to carry the maximum load current to which is will be subjected.
  • Page 21 Operation Figure 3.6 — Nexus to RTS/Nexus Smart Switch (Drawing 0H7453-C)

  • Page 22: Wire Recommendations/Sizing

    Operation WIRE RECOMMENDATIONS/ The load wires consist of wires run between the generator main circuit breaker and the transfer mechanism, and a neutral wire. See SIZING (SEE TABLE 4) "Wire Recommendations/Sizing" for load wire sizing information. 3.7.1 CONTROL WIRING 3.6.2 BLOCK HEATER CONNECTIONS Control system interconnections on a Nexus Series controlled Block heater kits can be purchased at the authorized dealer.
  • Page 23 Operation TABLE 4 — ALLOWABLE AMPACITIES OF INSULATED CONDUCTORS RATED 0-2000 VOLTS, 60° TO 90° C (140° TO 194° F). NOT MORE THAN THREE CONDUCTORS IN RACEWAY OR CABLE OR EARTH (DIRECTLY BURIED), BASED ON AMBIENT TEMPERATURE OF 30° C (86° F) (REFERENCE NEC TABLE 310-16) SIZE TEMPERATURE RATING OF CONDUCTOR SIZE...
  • Page 24 Part No. 0H8218 Revision F (05/08/12) Printed in U.S.A.

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