Generac Power Systems Fan OG 2697 User Manual

GenerATor  
INSTALLATION  
GUIDELINES  
Air-Cooled Generators  
Distributed Load Center Transfer Switch  
OG 2697  
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This exhaust system must be installed  
properly, in strict compliance with applicable  
codes and standards.  
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.  
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.  
If an open bottom is used, the engine-generator  
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.  
Adequate, unobstructed flow 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.  
Only qualified, competent installation  
contractors or electricians thoroughly familiar  
with applicable codes, standards and  
Keep the area around the generator clean and  
uncluttered. Remove any materials that could  
become hazardous.  
regulations should install this standby electric  
power system. The installation must comply  
strictly with all codes, standards and  
When working on this equipment,  
remain alert at all times. Never work  
on the equipment when physically or  
mentally fatigued.  
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.  
Generator Installation  
These generators are air-cooled, engine-  
driven generator sets designed to supply  
electric power that operates critical  
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 0ꢁꢁ69:  
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.  
NFPA 37, STATIONARY  
COMBUSTION ENGINES AND  
GAS TURBINES  
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.  
NFPA 54, NATIONAL FUEL  
GAS CODE  
NFPA 58, LIQUIFIED  
PETROLEUM GAS CODE  
NFPA 70, NATIONAL ELECTRIC  
CODE (NEC)  
Connecting this generator to an electrical  
system, normally supplied by an electric  
utility, shall be by means of a transfer switch,  
NFPA 99, STANDARD FOR HEALTH  
CARE FACILITIES  
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NFPA 0ꢀ, LIFE SAFETY CODE  
Grounding the Generator  
NFPA ꢀꢀ0, STANDARD FOR  
EMERGENCY AND STANDBY  
POWER SYSTEMS  
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. Grounding  
procedures must meet local regulations.  
NFPA ꢁ0, 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.  
Battery Installation  
Standby generators installed with automatic  
transfer switches will crank and start  
Other Published Standards  
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.  
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 ꢀ0038.  
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  
AGRICULTURAL WIRING  
HANDBOOK, obtainable from the Food  
and Energy Council, 909 University  
Avenue, Columbia, MO 65ꢁ0ꢀ.  
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 flame, sparks or  
any spark producing tools or equipment near  
the battery.  
ASAE EP-364.ꢁ, INSTALLATION  
AND MAINTENANCE OF FARM  
STANDBY ELECTRIC POWER,  
available from the American Society of  
Agricultural Engineers, ꢁ950 Niles Road,  
St. Joseph, MI 49085.  
Battery electrolyte fluid is an extremely  
caustic sulfuric acid solution that can cause  
severe burns. Do not permit fluid to contact  
eyes, skin, clothing, painted surfaces, etc.  
Wear protective goggles, protective clothing  
and gloves when handling a battery. If fluid  
is spilled, flush the affected area immediately  
with clear water.  
A5ꢁ.ꢀ, AMERICAN NATIONAL  
STANDARDS FOR CHIMNEYS,  
FIREPLACES AND VENTING  
SYSTEMS, available from the American  
National Standards Institute, ꢀ430  
Broadway, New York, NY ꢀ00ꢀ8.  
The installer must comply with all  
applicable state and local codes.  
Do not dispose of the battery in a fire. The  
battery is capable of exploding.  
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Do not open or mutilate the battery. Released  
electrolyte can be toxic and harmful to the  
skin and eyes.  
Servicing of batteries is to be performed or  
supervised by personnel knowledgeable of  
batteries and the required precautions. Keep  
unauthorized personnel away from batteries.  
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.  
For recommended batteries, see the  
Installation Guide. All batteries must be at  
ꢀ00 percent state of charge before they are  
installed on the generator.  
When using maintenance-free batteries, it is  
not necessary to check the specific gravity  
or electrolyte level. Have these procedures  
performed at the intervals specified 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.  
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, flush  
thoroughly and immediately with water  
and seek medical attention.  
NOTE:  
Damage could result if the battery  
connections are made in reverse.  
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 flushed with water  
and the area dried.  
Lead acid batteries present a risk of fire  
because they generate hydrogen gas. The  
following procedures are to be followed:  
DO NOT SMOKE when near batteries.  
DO NOT cause flame or spark in battery area.  
Discharge static electricity from body  
before touching batteries by first touching a  
grounded metal surface.  
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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  
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 airflow.  
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 five  
inches deep and about six inches longer and  
wider than the footprint of the generator. Cover  
with polyurethane film and fill with pea gravel  
or crushed stone. Compact and level the stone.  
Inspect the generator for shipping damage and,  
if necessary, file a claim with the shipper.  
Remove the bolts holding the generator base  
frame to the wooden pallet.  
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Make sure the lifting equipment you’ll be  
using has sufficient 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 specified 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  
specified by local regulations.  
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