Generac Power Systems OG 2697 Merkblatt

Air-Cooled Generators

Distributed Load Center Transfer Switch

GENERATOR

INSTALLATION

GUIDELINES

OG 2697

Study the SAFETY RULES in the Owner’s

Manual carefully before installing,

operating or servicing any equipment. Use

this guide ONLY in conjunction with the

Owner’s Manual and Installation Guide

shipped with the generator. The generator

can operate safely, efciently and reliably

only if it is properly installed, operated

and maintained.

The manufacturer cannot anticipate every

possible circumstance that might involve a

hazard. The warnings in this manual, and on

tags and decals afxed to the unit are,

therefore, not all-inclusive.

Despite the safe design of this generator,

operating this equipment imprudently,

neglecting its maintenance or being careless

can cause possible injury or death.

Permit only responsible and capable persons

to install, operate or maintain this equipment.

Potentially lethal voltages are generated by

these machines. Ensure all steps are taken to

render the machine safe before attempting to

work on the generator.

General Hazards

For safety reasons, the manufacturer

recommends that this equipment be

installed, serviced and repaired by

your local dealer or other competent, qualied

electrician or installation technician who is

familiar with applicable codes, standards and

regulations. The operator also must comply

with all such codes, standards and regulations.

Installation, operation, servicing and repair

of this (and related) equipment must always

comply with applicable codes, standards, laws

and regulations. Adhere strictly to local, state

and national electrical and building codes.

Comply with regulations the Occupational

Safety and Health Administration (OSHA)

has established. Also, ensure that the genera

tor

is installed, operated and serviced in ac

cordance

with the manufacturer’s instructions and

recommendations. Following installation, do

nothing that might render the unit unsafe or

in non-compliance with the aforementioned

codes, standards, laws and regulations.

Engine exhaust fumes contain carbon

monoxide gas, which can be DEADLY.

This dangerous gas, if breathed in sufcient

concentrations, can cause unconsciousness

or even death. For that reason, adequate

ventilation must be provided. Exhaust gases

must be piped safely away from any build

ing or

enclosure that houses the generator to

an area where people, animals, etc., will not

be harmed.

This booklet and the accompanying video are designed to familiarize you with the installation

process for your air-cooled generator. Neither this booklet nor the accompanying video

replace or supersede any information contained in any of the written documents shipped with

your equipment. This booklet should only be used in conjunction with the Owner’s Manual,

Installation Guide and other technical documents shipped with your equipment.

Future product updates and/or modications will be reected in the written documentation

included with your equipment. Always read all accompanying documentation

carefully before attempting to install any generator, transfer switch or related equipment.

It is essential to comply with all regulations established by the Occupational Safety and Health

Administration (OSHA) and strict adherence to all local, state and national codes is mandatory.

This exhaust system must be installed

properly, in strict compliance with applicable

codes and standards.

Keep hands, feet, clothing, etc., away from

drive belts, fans and other moving or hot

parts. Never remove any drive belt or fan

guard while the unit is operating.

Adequate, unobstructed ow of cooling and

ventilating air is critical to prevent buildup of

explosive gases and to ensure correct

generator operation. Do not alter the

installation or permit even partial blockage of

ventilation provisions, as this can seriously

affect safe operation of the generator.

Keep the area around the generator clean and

uncluttered. Remove any materials that could

become hazardous.

When working on this equipment,

remain alert at all times. Never work

on the equipment when physically or

mentally fatigued.

Generator Installation

These generators are air-cooled, engine-

driven generator sets designed to supply

electric power that operates critical

electrical loads during utility power

failure. Your generator was factory-installed

in a weather resistant, all metal enclosure and

are intended for outdoor installation only.

Before Installation

The generator’s rated wattage/amperage

capacity must be adequate to handle all

electrical loads that the unit will power. The

critical (essential) loads may need to be

grouped together and wired into a separate

“emergency” distribution panel.

Connecting this generator to an electrical

system, normally supplied by an electric

utility, shall be by means of a transfer switch,

to isolate the electrical system from the

utility

distribution system when the generator is

operating. Failure to isolate the electrical

system by these means will result in damage

to the generator and may also result in injury

or death to utility workers due to backfeed of

electric energy.

If an open bottom is used, the engine-genera

tor

is to be installed over non-combustible

materials and should be located such that

combustible materials are not capable of

accumulating under the generator set.

Only qualied, competent installation

contractors or electricians thoroughly familiar

with applicable codes, standards and

regulations should install this standby electric

power system. The installation must comply

strictly with all codes, standards and

regulations pertaining to the installation.

After the system has been installed,

do nothing that might render the

installation in non-compliance with such

codes, standards and regulations.

NFPA Standards

The following published standards

booklets pertaining to standby electrical

systems are available from the National Fire

Protection Association (NFPA), Batterymarch

Park, Quincy, MA 02269:

NFPA 37, STATIONARY

COMBUSTION ENGINES AND

GAS TURBINES

NFPA 54, NATIONAL FUEL

GAS CODE

NFPA 58, LIQUIFIED

PETROLEUM GAS CODE

NFPA 70, NATIONAL ELECTRIC

CODE (NEC)

NFPA 99, STANDARD FOR HEALTH

CARE FACILITIES

NFPA 101, LIFE SAFETY CODE

NFPA 110, STANDARD FOR

EMERGENCY AND STANDBY

POWER SYSTEMS

NFPA 220, STANDARD TYPES OF

BUILDING CONSTRUCTION

NOTE:

It is essential to use the latest version of any

standard to ensure that the generator and its

accessories comply with all the applicable

standards and local codes.

Other Published Standards

In addition to NFPA standards, the

following information pertaining to the

installation and use of standby electric

systems is available:

Article X, NATIONAL BUILDING CODE,

available from the American Insurance

Association, 85 John Street, New York,

NY 10038.

AGRICULTURAL WIRING

HANDBOOK, obtainable from the Food

and Energy Council, 909 University

Avenue, Columbia, MO 65201.

ASAE EP-364.2, INSTALLATION

AND MAINTENANCE OF FARM

STANDBY ELECTRIC POWER,

available from the American Society of

Agricultural Engineers, 2950 Niles Road,

St. Joseph, MI 49085.

A52.1, AMERICAN NATIONAL

STANDARDS FOR CHIMNEYS,

FIREPLACES AND VENTING

SYSTEMS, available from the American

National Standards Institute, 1430

Broadway, New York, NY 10018.

The installer must comply with all

applicable state and local codes.

Grounding the Generator

A grounding lug is provided on the generator

mounting base for the purpose of ground

ing 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. Grounding

procedures must meet local regulations.

Battery Installation

Standby generators installed with automatic

transfer switches will crank and start

automatically when NORMAL (UTILITY)

source voltage is removed or is below an

acceptable preset level. To prevent such

automatic start-up and possible injury to

personnel, do not connect battery cables

until certain that normal source voltage at the

transfer switch is correct and the system is

ready to be placed into operation.

Storage batteries give off explosive hydrogen

gas. This gas can form an explosive mixture

around the battery for several hours after

charging. The slightest spark can ignite the

gas and cause an explosion. Such an

explosion can shatter the battery and cause

blindness or other injury. Any area that houses

a storage battery must be properly ventilated.

Do not allow smoking, open ame, sparks or

any spark producing tools or equipment near

the battery.

Battery electrolyte uid is an extremely

caustic sulfuric acid solution that can cause

severe burns. Do not permit uid to contact

eyes, skin, clothing, painted surfaces, etc.

Wear protective goggles, protective clothing

and gloves when handling a battery. If uid

is spilled, ush the affected area immediately

with clear water.

Do not dispose of the battery in a re. The

battery is capable of exploding.

Do not open or mutilate the battery. Released

electrolyte can be toxic and harmful to the

skin and eyes.

The battery represents a risk of high

short-circuit current. When working on the

battery, always remove watches, rings or

other metal objects, and only use tools that

have insulated handles.

Vented Batteries

The electrolyte is a diluted sulfuric acid

that is harmful to the skin and eyes. It is

electrically conductive and corrosive. The

following procedures are to be observed:

Wear full eye protection and

protective clothing.

If electrolyte contacts the skin, wash it

off immediately with water.

If electrolyte contacts the eyes, ush

thoroughly and immediately with water

and seek medical attention.

Spilled electrolyte is to be washed down

with an acid-neutralizing agent. A common

practice is to use a solution of one pound

(500 grams) bicarbonate of soda to one gallon

(4 liters) of water. The bicarbonate of soda

solution is to be added until the evidence

of reaction (foaming) has ceased. The

resulting liquid is to be ushed with water

and the area dried.

Lead acid batteries present a risk of re

because they generate hydrogen gas. The

following procedures are to be followed:

DO NOT SMOKE when near batteries.

DO NOT cause ame or spark in battery area.

Discharge static electricity from body

before touching batteries by rst touching a

grounded metal surface.

Servicing of batteries is to be performed or

supervised by personnel knowledgeable of

batteries and the required precautions. Keep

unauthorized personnel away from batteries.

For recommended batteries, see the

Installation Guide. All batteries must be at

100 percent state of charge before they are

installed on the generator.

When using maintenance-free batteries, it is

not necessary to check the specic gravity

or electrolyte level. Have these procedures

performed at the intervals specied in the

“Maintenance” section in the Owner’s

Manual. A negative ground system is used.

Battery connections are shown on the wiring

diagrams. Make sure all batteries are correctly

connected and terminals are tight. Observe

battery polarity when connecting batteries to

the generator set.

NOTE:

Damage could result if the battery

connections are made in reverse.

Locate the mounting pad as close as possible to

the transfer switch and fuel supply.

Leave adequate room around the pad for

service access (check local code) and place

the pad high enough to keep rising water from

reaching the generator.

Choose an open space that will provide

adequate and unobstructed airow.

Place the unit so air vents won’t become

clogged with leaves, grass, snow or debris.

Make sure exhaust fumes will not enter the

building through eaves, windows, ventilation

fans or other air intakes.

Dig a rectangular area approximately ve

inches deep and about six inches longer and

wider than the footprint of the generator. Cover

with polyurethane lm and ll with pea gravel

or crushed stone. Compact and level the stone.

Inspect the generator for shipping damage and,

if necessary, le a claim with the shipper.

Remove the bolts holding the generator base

frame to the wooden pallet.

BEFORE YOU BEGIN

Carefully read and follow all of the procedures and safety precautions detailed in the installation

guide. If you do not completely understand any portion of the installation manual, technical manual

or other factory-supplied documents, contact an authorized dealer for assistance.

Fully comply with all relevant NEC, NFPA and OSHA standards as well as all federal, state and

local building and electric codes. As with any generator, this unit must be installed in accordance

with current NFPA 37 and NFPA 70 standards as well as any other federal, state, and local codes for

minimum distances from other structures.

Contact the local inspector or city hall to make sure you are aware of all state and local codes and

regulations that could impact installation. Secure all required permits before starting the job.

Site Preparation & Generator Placement

Make sure the lifting equipment you’ll be

using has sufcient capacity to safely handle

the weight of the generator.

Use nylon lifting straps and connect them

to the lifting eyes on each corner of the base

frame to avoid damaging the enclosure.

Set the generator onto the pad so that the

gravel bed extends several inches beyond the

generator on all sides.

Make sure the generator is level within ½ inch.

Some locations require the use of a poured

concrete mounting pad. If you’re using a

concrete pad, secure the base frame of the

generator to the pad with appropriately sized

masonry bolts or other fasteners specied by

local code.

Connect an approved ground strap to the

grounding lug on the base frame and to an

approved earth ground or grounding rod as

specied by local regulations.

Check the engine oil, and if necessary, add

enough of the recommended oil to bring the

level up to the FULL mark on the dipstick. Be

careful not to overll the crankcase.

The generator was congured for natural gas

operation at the factory. Switching over to LP

vapor is a simple procedure.

On models with the V-Twin engine, simply ip

the fuel selection switch from natural gas to LP.

On models with a single-cylinder engine, start

by making sure the battery is disconnected.

Disconnect the two wires from the solenoid and

remove the fuel hose from the outlet port.

Remove the steel plug from the number one

outlet port and the brass tting for the fuel hose

from the number two port.

Using a quality sealant on the threaded ttings,

install the brass tting in port one and the steel

plug in port two.

Converting To LP Vapor

Replace the fuel hose and clamp. Then

reconnect the wires to the solenoid.

Finally, insert the plastic plug that came with

the generator into the hole on the bottom of the

air cleaner base.

Both natural gas and LP vapor are highly

volatile substances, so strict adherence to all

safety procedures, codes, standards and

regulations is essential.

Gas line connections should be made by a

certied plumber familiar with local codes.

Always use AGA-approved gas pipe and a

quality pipe sealant or joint compound.

Most applications will require a manual shutoff

valve on the fuel line.

Installing & Connecting Gas Lines

When connecting the gas line to the generator,

use a short section of UL Listed or AGA-

approved exible fuel line in accordance with

local regulations. The purpose of the exible

fuel line is to ensure that vibration from the

generator does not cause a gas leak at one of

the connection points, so it’s important that the

line be installed with as few bends as possible.

Never bend the exible fuel line to avoid

using an elbow. Bending the exible line

decreases its ability to absorb vibrations and

defeats its purpose.

Check the gas pressure at the secondary

regulator to make sure there’s enough pressure

for proper generator operation.

The local gas supplier is responsible for

ensuring adequate pressure, so if the pressure

is too low, or if it’s greater than 14 inches of

water column, contact the gas supplier.

When you’ve nished checking the gas

pressure, close the manual shutoff valve.

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