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STANDBY GENERATOR

OWNER'S MANUAL

This manual should remain with the unit.

A new standard of reliability

Serial Number QT

5.4L

80kW

Models

Cover004 Rev. 0 08/05 Part No. 0F3608

Standby Generator Sets

Table of Contents

SECTION PAGE

SAFETY RULES ................................................ 1-1

INTRODUCTION .....................................................1-3

Read this Manual Thoroughly ...................................1-3

Operation and Maintenance ......................................1-3

How to Obtain Service ..............................................1-3

IDENTIFICATION RECORD .....................................2-1

Data Label ................................................................2-1

EQUIPMENT DESCRIPTION ...................................3-1

Equipment Description ................................................3-1

Engine Oil Recommendations ......................................3-1

Coolant Recommendations...........................................3-1

ENGINE PROTECTIVE DEVICES ............................4-1

Coolant Temperature Sensing ...................................4-1

Low Coolant Level .....................................................4-1

Oil Pressure Sensing .................................................4-1

Overcrank Shutdown ................................................4-1

Overspeed Shutdown ................................................4-1

RPM Sensor Loss Shutdown .....................................4-1

DC Fuse ....................................................................4-1

FUEL SYSTEMS .....................................................5-1

Fuel Requirements ....................................................5-1

Natural Gas Fuel System ..........................................5-1

Propane Vapor Withdrawal Fuel System....................5-1

LP Fuel System .........................................................5-1

SPECIFICATIONS ...................................................6-1

Generator .................................................................6-1

Engine.......................................................................6-1

Cooling System .........................................................6-1

Fuel System ..............................................................6-1

Electrical System ......................................................6-1

Cold Weather Kit .......................................................6-2

5.4L & 6.8L Ignition Description .................................6-3

Ignition Power-up Input (“56 Line Input”) .................6-3

Ignition Enable (“14 Line Input”) ..............................6-3

Ignition Shutdown on Loss of Crank

or CAM Signals .........................................................6-3

Diagnostic Blink Patterns (Red LED Located

on the Ignition Control Board ...................................6-3

GENERAL INFORMATION .......................................7-1

Generator AC Lead Connections ..................................7-1

Four-lead, Single-phase Stator ..................................7-1

Alternator Power Winding Connections ........................7-1

3-phase Alternators ..................................................7-1

INSTALLATION .......................................................8-1

Installation ...................................................................8-1

Preparation Before Start-up .........................................8-1

Transfer Switch ........................................................8-1

Fuel System ..............................................................8-1

Generator Set Lubrication ........................................8-1

Prior to Initial Start-up .............................................8-1

Initial Inspection for QT Genset Start-up .....................8-2

Start-up Inspection ...................................................8-2

OPERATION ...........................................................9-1

Generator Control and Operation ................................9-1

Operating Unit with Automatic Transfer Switch ...........9-1

Operating Unit with Manual Transfer Switch ...............9-1

Engine Start-up and Transfer ...................................9-1

Retransfer and Shutdown .........................................9-1

MAINTENANCE .....................................................10-1

Maintenance Performed by Authorized

Service Facilities .....................................................10-1

Cooling System ..........................................................10-1

Checking Fluid Levels ................................................10-1

Check Engine Oil ....................................................10-1

Battery Fluid ...........................................................10-1

Engine Coolant .......................................................10-2

Maintenance Owner/Operator Can Perform ................10-2

Check Engine Oil Level ...........................................10-2

Check Battery .........................................................10-2

Exercise System ......................................................10-2

Inspect Cooling System ...........................................10-2

Check Engine Coolant Level....................................10-2

Perform Visual Inspection .......................................10-2

Inspect Exhaust System ..........................................10-2

Check Fan Belt ........................................................10-2

Inspect Engine Governor ........................................10-2

Changing Engine Oil ...............................................10-2

Changing the Engine Air Cleaner ............................10-3

Spark Plugs ............................................................10-3

Coolant Change .......................................................10-3

Miscellaneous Maintenance ........................................10-3

Cleaning the Generator ...........................................10-3

Battery ....................................................................10-4

Battery Maintenance ...............................................10-4

Battery Replacement ...............................................10-4

SERVICE SCHEDULE ...........................................11-1

30 kW - 150 kW Standby Gas Engine

Driven Generator Sets ............................................11-1

TROUBLESHOOTING ...........................................12-1

Troubleshooting Guide ...............................................12-1

NOTES

EXPLODED VIEWS & PARTS LISTS

WIRING DIAGRAMS & SCHEMATICS

WARRANTY

Content003 Rev. 0 08/05

Study these SAFETY RULES carefully before install-

ing, operating or servicing this equipment. Become

familiar with this Owner’s Manual and with the unit.

The generator can operate safely, efficiently and reli-

ably only if it is properly installed, operated and

maintained. Many accidents are caused by failing to

follow simple and fundamental rules or precautions.

The manufacturer cannot anticipate every possible

circumstance that might involve a hazard. The warn-

ings in this manual, and on tags and decals affixed

to the unit are, therefore, not all inclusive. If a pro-

cedure, work method or operating technique is used

that the manufacturer does not specifically recom-

mend, ensure that it is safe for others. Also make

sure the procedure, work method or operating tech-

nique utilized does not render the generator unsafe.

DANGER

 Despite the safe design of this generator,

operating this equipment imprudently, neglect-

ing its maintenance or being careless can cause

possible injury or death. Permit only responsible

and capable persons to install, operate or main-

tain 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.

 Parts of the generator are rotating and/or hot

during operation. Exercise care near running

generators.

 GENERAL HAZARDS 

• For safety reasons, the manufacturer recommends

that this equipment be installed, serviced and

repaired by an Authorized Service Dealer or other

competent, qualified electrician or installation tech-

nician who is familiar with applicable codes, stan-

dards and regulations. The operator also must

comply with all such codes, standards and regula-

tions.

• 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 electri-

cal and building codes. Comply with regulations

the Occupational Safety and Health Administration

(OSHA) has established. Also, ensure that the

generator is installed, operated and serviced in

accordance with the manufacturer’s instructions

and recommendations. Following installation, do

nothing that might render the unit unsafe or in

noncompliance with the aforementioned codes,

standards, laws and regulations.

• The engine exhaust fumes contain carbon monox-

ide gas, which can be DEADLY. This dangerous gas,

if breathed in sufficient concentrations, can cause

unconsciousness or even death. For that reason,

adequate ventilation must be provided. Exhaust

gases must be piped safely away from any building

or enclosure that houses the generator to an area

where people, animals, etc., will not be harmed.

This exhaust system must be installed properly, in

strict compliance with applicable codes and stan-

dards.

• 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 flow of cooling and venti-

lating air is critical in any room or building hous-

ing the generator 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 seri-

ously 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.

• Inspect the generator regularly, and promptly

repair or replace all worn, damaged or defective

parts using only factory-approved parts.

 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 service and repair technicians for this equipment.

The engine exhaust from this product

contains chemicals known to the state

of California to cause cancer, birth

defects or other reproductive harm.

WARNING:

 

This product contains or emits chemicals

known to the state of California to cause

cancer, birth defects or other reproductive harm.

WARNING:

 

1-1

Standby Generator Sets

Important Safety Instructions



Safety 001 Rev. 0 08/05

• Before performing any maintenance on the gen-

erator, disconnect its battery cables to prevent

accidental start-up. Disconnect the cable from the

battery post indicated by a NEGATIVE, NEG or (–)

first. Reconnect that cable last.

• Never use the generator or any of its parts as a

step. Stepping on the unit can stress and break

parts, and may result in dangerous operating con-

ditions from leaking exhaust gases, fuel leakage,

oil leakage, etc.

 ELECTRICAL HAZARDS 

• All generators covered by this manual produce

dangerous electrical voltages and can cause fatal

electrical shock. Utility power delivers extremely

high and dangerous voltages to the transfer switch

as well as the standby generator. Avoid contact

with bare wires, terminals, connections, etc., on

the generator as well as the transfer switch, if

applicable. Ensure all appropriate covers, guards

and barriers are in place before operating the gen-

erator. If work must be done around an operating

unit, stand on an insulated, dry surface to reduce

shock hazard.

• Do not handle any kind of electrical device while

standing in water, while barefoot, or while hands or

feet are wet. DANGEROUS ELECTRICAL SHOCK

MAY RESULT.

• If personnel must stand on metal or concrete while

installing, operating, servicing, adjusting or repair-

ing this equipment, place insulative mats over a

dry wooden platform. Work on the equipment only

while standing on such insulative mats.

• The National Electrical Code (NEC) requires the

frame and external electrically conductive parts

of the generator to be connected to an approved

earth ground. This grounding will help prevent

dangerous electrical shock that might be caused

by a ground fault condition in the generator set or

by static electricity. Never disconnect the ground

wire.

• Wire gauge sizes of electrical wiring, cables and

cord sets must be adequate to handle the maxi-

mum electrical current (ampacity) to which they

will be subjected.

• Before installing or servicing this (and related)

equipment, make sure that all power voltage

supplies are positively turned off at their source.

Failure to do so will result in hazardous and pos-

sibly fatal electrical shock.

• Connecting this unit to an electrical system nor-

mally supplied by an electric utility shall be by

means of a transfer switch so as to isolate the

generator electric system from the electric utility

distribution system when the generator is operat-

ing. Failure to isolate the two electric system power

sources from each other by such means will result

in damage to the generator and may also result

in injury or death to utility power workers due to

backfeed of electrical energy.

• Generators installed with an automatic transfer

switch 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 person-

nel, disable the generator’s automatic start circuit

(battery cables, etc.) before working on or around

the unit. Then, place a “Do Not Operate” tag on

the generator control panel and on the transfer

switch.

• In case of accident caused by electric shock, imme-

diately shut down the source of electrical power.

If this is not possible, attempt to free the victim

from the live conductor. AVOID DIRECT CONTACT

WITH THE VICTIM. Use a nonconducting imple-

ment, such as a dry rope or board, to free the vic-

tim from the live conductor. If the victim is uncon-

scious, apply first aid and get immediate medical

help.

• Never wear jewelry when working on this equip-

ment. Jewelry can conduct electricity resulting in

electric shock, or may get caught in moving com-

ponents causing injury.

 FIRE HAZARDS 

• Keep a fire extinguisher near the generator at all

times. Do NOT use any carbon tetra-chloride type

extinguisher. Its fumes are toxic, and the liquid

can deteriorate wiring insulation. Keep the extin-

guisher properly charged and be familiar with its

use. If there are any questions pertaining to fire

extinguishers, consult the local fire department.

 EXPLOSION HAZARDS 

• Properly ventilate any room or building housing

the generator to prevent build-up of explosive gas.

• Do not smoke around the generator. Wipe up any

fuel or oil spills immediately. Ensure that no com-

bustible materials are left in the generator com-

partment, or on or near the generator, as FIRE or

EXPLOSION may result. Keep the area surround-

ing the generator clean and free from debris.

• These generator sets may operate using one of

several types of fuels. All fuel types are potentially

FLAMMABLE and/or EXPLOSIVE and should be

handled with care. Comply with all laws regulat-

ing the storage and handling of fuels. Inspect the

unit’s fuel system frequently and correct any leaks

immediately. Fuel supply lines must be prop-

erly installed, purged and leak tested according to

applicable fuel-gas codes before placing this equip-

ment into service.

• Diesel fuels are highly FLAMMABLE. Gaseous

fluids such as natural gas and liquid propane

(LP) gas are extremely EXPLOSIVE. Natural gas

is lighter than air, and LP gas is heavier than air;

install leak detectors accordingly.

1-2

Standby Generator Sets

Important Safety Instructions

Safety 001 Rev. 0 08/05

IDENTIFICATION RECORD

DATA LABEL

Every generator set has a DATA LABEL that contains

important information pertinent to the generator. The

data label, which can be found attached to the gen-

erator’s lower connection box, lists the unit’s serial

number and its rated voltage, amps, wattage capacity,

phase, frequency, rpm, power factor, etc.

WAUKESHA, WI

RATED KW

RATED VOLTAGE

POWER FACTOR

ENGINE RPM

ALTERNATOR SUBTRANSIENT REACTANCE

ALTERNATOR TRANSIENT REACTANCE

CLASS

MODEL

MADE IN USA

PRODUCTION DATE

GENERAC POWER SYSTEMS, INC.

HERTZ

RATED KVA

GENERATOR SET DATA

RATED AMPS

ALT RPM

PHASE

SERIAL

ROTOR STATOR WINDING INSULATION AT 25 C AMBIENT°

NOTE:

For actual information related to this particular

model, please refer to the Manual Drawing Listing

located at the end of this manual, or to the data

label affixed to the unit.

Generator Model and Serial Number

This number is the key to numerous engineering and

manufacturing details pertaining to your unit. Always

supply this number when requesting service, order-

ing parts or seeking information.





Identification Code

Use this code to obtain important information about

the generator. For example, if the code is:

M — Designates generators capable of paralleling.

NOTE: Only 100kW and 150kW, 6.8L units

are currently available for this configura-

tion.

QT — Quiet Test Generator Series

100 — kw Rating

5.4 — Engine Size in Liters

A — Voltage Code: A = 120/240, Single-phase;

G = 120/208, Three-phase; K = 277/480,

Three-phase; J = 120/240, Three-phase;

L = 346/600, Three-phase

N — Fuel: N = Natural Gas; V = Vapor Propane

S — Enclosure Material: A = Aluminum; S

= Steel (Corrosion Resistant Aluminum

Enclosure Material, Steel is Standard)

N — Emission Equipment: N = No Equipment;

Y = Catalytic Converter and Air/Fuel Ratio

Controller

A — Industrial Dealer Product

Voltage Codes

The identification code letter following the unit’s

engine size is the generator’s “voltage code.”

Groups and Assembly Numbers

The manual drawing listing lists the groups and cor-

responding assembly numbers for each unit. The

assembly numbers refer to exploded view drawing

numbers that are applicable to the specific generator

model. These drawings are located in the back half

of this manual.



2-1

Standby Generator Sets

General Information

Identy001 Rev. C 04/06

M Q T 1 0 0 5 4 A N S N A

EQUIPMENT DESCRIPTION

This equipment is a revolving field, alternating cur-

rent generator set. It is powered by a gaseous fueled

engine operating at 1800 rpm for 4-pole direct drive

units, 3600 rpm for 2-pole direct drive units and

2300 - 3000 rpm for quiet drive gear units. See the

Specifications section for exact numbers. The unit

comes complete with a sound attenuated enclosure,

internally mounted muffler, control console, main-

line circuit breaker, battery charger, and protective

alarms as explained in the following paragraph.

All AC connections, including the power leads from

the alternator, 120 volt battery charger input and

control connections to the transfer switch are avail-

able in the main connection box.

The generator incorporates the following generator

features:

• Rotor and Stator insulation is Class H rated as

defined by NEMA MG1-32.6, NEMA MG1-1.66.

The generator is self ventilated and drip-proof con-

structed.

• The voltage waveform deviation, total harmonic

content of the AC waveform and telephone influ-

ence factor have been evaluated and are acceptable

according to NEMA MG1-32.

ENGINE OIL RECOMMENDATIONS

The unit has been filled with 15W-40 engine oil at

the factory. Use a high-quality detergent oil classi-

fied “For Service SJ or SH.” Detergent oils keep the

engine cleaner and reduce carbon deposits. Use oil

having the following SAE viscosity rating, based on

the ambient temperature range anticipated before the

next oil change:

 Any attempt to crank or start the engine before

it has been properly serviced with the recom-

mended oil may result in an engine failure.

NOTE:

For temperatures below 32° F, it is strongly recom-

mended to use the optional Cold Weather Start Kit

(part number listed in the Specification Section).

The oil grade for temperatures below 32° F is 5W-

30 synthetic oil.

COOLANT RECOMMENDATIONS

Use a mixture of half low silicate ethylene glycol

base anti-freeze and deionized water. Cooling system

capacity is listed in the specifications. Use only deion-

ized water and only low silicate anti-freeze. If desired,

add a high quality rust inhibitor to the recommended

coolant mixture. When adding coolant, always add

the recommended 50-50 mixture.

 Do not use any chromate base rust inhibitor

with ethylene glycol base anti-freeze or chro-

mium hydroxide (“green slime”) forms and will

cause overheating. Engines that have been oper-

ated with a chromate base rust inhibitor must

be chemically cleaned before adding ethylene

glycol base anti-freeze. Using any high silicate

anti-freeze boosters or additives will also cause

overheating. The manufacturer also recommends

that any soluble oil inhibitor is NOT used for this

equipment.

DANGER

 Do not remove the radiator pressure cap while

the engine is hot or serious burns from boiling

liquid or steam could result.

 Ethylene glycol base antifreeze is poisonous.

Do not use mouth to siphon coolant from the

radiator, recovery bottle or any container. Wash

hands thoroughly after handling. Never store

used antifreeze in an open container because

animals are attracted to the smell and taste of

antifreeze even though it is poisonous to them.

Temperature Oil Grade (Recommended)

Above 80° F (27° C) SAE 30W or 15W-40

32° to 80° F (0° to 27° C) SAE 20W-20 or 15W-40

Below 32° F (0° C) See Note

3-1

Standby Generator Sets

Equipment Description

Equip001 Rev. A 08/06

ENGINE PROTECTIVE DEVICES

The standby generator may be required to operate for

long periods of time without an operator on hand to

monitor such engine conditions as coolant tempera-

ture, oil pressure or rpm. For that reason, the engine

has several devices designed to protect it against

potentially damaging conditions by automatically

shutting down the unit when the oil pressure is too

low, the coolant temperature is too high, the coolant

level is too low, or the engine is running too fast.

NOTE:

Engine protective switches and sensors are men-

tioned here for the reader's convenience. Also refer

to the applicable control panel manual for addi-

tional automatic engine shutdown information.

COOLANT TEMPERATURE SENSING

An analog Water Temperature Sender (WTS) is locat-

ed in the engine's cooling system. This sender is con-

nected to the panel and allows the panel to monitor

and display the temperature of the coolant system.

The WTS is a resistive device whose resistance chang-

es based on coolant temperature. The resistance of

the sender results in a voltage being developed across

the sender. As the Coolant temperature increases,

the resistance will decrease, causing the voltage to

decrease. This changing voltage is converted to 4-

20mA signal by a signal conditioner module. The

corresponding 4-20mA signal is read by the control

panel and displayed as the coolant temperature.

The control panel will monitor and display the cool-

ant temperature anytime the DC input to the control

panel is present.

If the temperature exceeds approximately 140° C

(284° F), the engine shutdown will be initiated. The

generator will automatically restart and the display

will reset once the temperature has returned to an

operating level.

LOW COOLANT LEVEL

A Low Coolant Level (LCL) sensor is placed in the

generators coolant system. This sensor allows the

panel to detect a Low Coolant Level condition.

The LCL is a resistive device whose resistance changes

rapidly based on the presence or absence of coolant.

The resistance of the LCL results in a voltage being

developed across the LCL. This voltage changes as

the resistance changes. This changing voltage is con-

verted to 4-20mA signal by a signal conditioner mod-

ule. The corresponding 4-20mA signal is read by the

control panel and displayed as the low coolant level.

If the level of the engine coolant drops below the level

of the low coolant level sensor, the engine shutdown

will be initiated.



OIL PRESSURE SENSING

An analog Oil Pressure Sender (OPS) is used for

monitoring the engine oil pressure. This sender

allows the control panel to measure and display the

Engine oil pressure.

The OPS is a resistive device, whose resistance

changes based on engine oil pressure. The resistance

of the sender results in a voltage being developed

across the sender. As the oil pressure increases,

the resistance will decrease, causing the voltage to

decrease. This changing voltage is converted to 4-

20mA signal by a signal conditioner module. The

corresponding 4-20mA signal is read by the control

panel and displayed as the oil pressure.

The control panel will monitor and display oil pres-

sure anytime the DC input to the control panel is

present.

Should the oil pressure drop below the 8 psi range,

the engine shutdown is initiated. The unit should not

be restarted until oil is added. Turn the AUTO/OFF/

MANUAL switch to the OFF position, then back to

AUTO to restart.

OVERCRANK SHUTDOWN

When the control panel receives a start signal, it ini-

tiates the programmed starting sequence. The start

sequence consists of the number of crank attempts,

the length of each crank attempt, and the rest time

between each crank attempt. If the engine has not

started by the end of the final crank attempt, an

Overcrank alarm is generated, the control panel will

sound the alarm and display the message "Failed to

start".

OVERSPEED SHUTDOWN

A speed circuit controls engine cranking, start-up,

operation and shutdown. Engine speed signals are

delivered to the circuit board whenever the unit is

running. Should the engine over speed above a safe,

preset value, the circuit board initiates an automatic

engine shutdown. Contact the nearest Authorized

Dealer if this failure occurs.

RPM SENSOR LOSS SHUTDOWN

If the speed signal to the control panel is lost, engine

shutdown will occur.

DC FUSE

This fuse is located inside of the control panel. It

protects the panel wiring and components from

damaging overload. Always remove this fuse before

commencing work on the generator. The unit will

not start or crank if the fuse is blown. Replace the

fuse with one of the same size, type, and rating. (See

the exploded views and parts lists at the end of this

manual for replacement part number.)



4-1

Standby Generator Sets

Engine Protective Devices

EngProt002 Rev. B 10/05

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

• Liquid propane (LP) fuel system

The Manual Drawing Listing that is affixed to the

unit includes the “Identification Code,” which may be

used to identify the type of fuel system installed on

the unit.

Recommended fuels should have a Btu content of at

least 1,000 Btu's per cubic foot for natural gas; or at

least 2,520 Btu's per cubic foot for LP gas. Ask the

fuel supplier for the Btu content of the fuel.

Required fuel pressure for natural gas is 11 inches

to 14 inches water column (0.4 to 0.5 psi); and for

liquid propane, 11 inches to 14 inches of water

column (0.4 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 11 inches

water column for natural gas or 11 inches water

column for liquid propane 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.

LP FUEL SYSTEM

LP is supplied as a liquid in pressure tanks. It is

usually made up of propane, butane, or a mixture of

the two gases. Propane tends to vaporize readily even

at temperatures as low as -20° F (-29° C). However,

butane reverts to its liquid state when temperatures

drop below 32° F (0° C).

LP in a liquid withdrawal system must be converted

to its gaseous state before it is introduced into the

engine carburetor. A vaporizer-converter is generally

used to accomplish this. In such a converter, heated

engine coolant is ported through the converter to

provide the necessary heat for conversion of the fuel

from a liquid to a gaseous state.



5-1

Standby Generator Sets

Fuel Systems

FuelSys002 Rev. A 05/06

SPECIFICATIONS

GENERATOR

Type ............................................................................. Synchronous

Rotor Insulation ................................................................... Class H

Stator Insulation .................................................................. Class H

Total Harmonic Distortion ......................................................< 3.5%

Telephone Interference Factor (TIF) ..........................................< 50

Alternator Output Leads 3-phase ........................................... 4-wire

Bearings .........................................................................Sealed Ball

Coupling ..........................................................................Gear Drive

Load Capacity (Standby Rating) ............................................80kW*

* NOTE: Generator rating and performance in accordance with ISO8528-5, BS5514, SAE J1349,

ISO3046 and DIN 6271 Standards. KW rating is based on LPG fuel and may derate with natural

gas.

Excitation System ............................................................. Brushless

Generator Output Voltage/kW - 60 Hz kW Amp CB Size

120/240V, 1-phase, 1.0 pf 80 333 350

120/208V, 3-phase, 0.8 pf 80 278 300

277/480V, 3-phase, 0.8 pf 80 120 150

Generator Locked Rotor KVA Available @ Voltage Dip of 35%

Single-phase or 208 3-phase ...........................................160 Amp

480V, 3-phase ..................................................................185 Amp

ENGINE

Make ................................................................................... Generac

Model ......................................................................................V-type

Cylinders and Arrangement ............................................................ 8

Displacement .......................................................................5.4 Liter

Bore ...................................................................................... 3.55 in.

Stroke ................................................................................... 4.17 in.

Compression Ratio ..................................................................9-to-1

Air Intake System ...............................................Naturally Aspirated

Valve Seats ....................................................................... Hardened

Lifter Type .......................................................................... Hydraulic

Engine Parameters

Rated Synchronous RPM ..............................................60 Hz, 2650

HP at rated kW ................................................................60 Hz, 138

Exhaust System

Exhaust Flow at Rated Output 60 Hz .................................. 649 cfm

Exhaust Temperature at Rated Output .................................. 800° F

Combustion Air Requirements (Natural Gas)

Flow at rated power, 60 Hz ................................................. 240 cfm

Governor

Type .................................................................................. Electronic

Frequency Regulation ...................................................Isochronous

Steady State Regulation ........................................................± 1/2%

Adjustments:

Speed ............................................................................ Selectable



Engine Lubrication System

Type of Oil Pump ...................................................................... Gear

Oil Filter .............................................................Full Flow, Cartridge

Crankcase Oil Capacity ....................................................5 U.S. qts.

COOLING SYSTEM

Type ....................................................................................... Closed

Water Pump .................................................................... Belt Driven

Fan Speed ................................................................................ 1600

Fan Diameter .....................................................................26 inches

Fan Mode ................................................................................Puller

Air Flow (inlet air including alternator and

combustion air) .......................................................... 5300 ft3/min.

Coolant Capacity ........................................................ (4.0 U.S. gal.)

Heat Rejection to Coolant ..........................................301,000 Btu/h

Maximum Operating Air Temp. on Radiator ..............60° C (150° F)

Maximum Ambient Temperature ................................50° C (140° F)

FUEL SYSTEM

Type of Fuel .........................................Natural Gas/Propane Vapor*

Carburetor ...................................................................... Down Draft

Secondary Fuel Regulator .................................................Standard

Fuel Shut-off Solenoid ........................................................Standard

Operating Fuel Pressure .................... 11 in. - 14 in. Water Column

Fuel Consumption - ft3/hr (Natural Gas/LPV)

Exercise 25% 50% 75% 100%

Cycle Load Load Load Load

125/50.4 297/119 571/230 795/320 1100/442

* Engine is not field convertible between natural gas and propane. Jet size and ignition timing are

factory set for the specific fuel.

ELECTRICAL SYSTEM

Battery Charge Alternator ............................................12V, 30 Amp

Static Battery Charger ....................................................12V, 2 Amp

Recommended Battery ................................................ 24F 525CCA

System Voltage .....................................................................12 Volts

Voltage Regulator

Type ................................................................................. Full Digital

Sensing ................................................................................ 3-phase

Regulation .............................................................................± 1/4%

Features ............................................ Built into H-100 Control Panel

V/F Adjustable, Adjustable

Voltage and Gain

Power Adjustment for Ambient Conditions

Temperature Deration

3% for every 10° C above °C ..................................................... 25

1.65% for every 10° above °F .................................................... 77

Altitude Deration

1% for every 100 m above m ................................................... 183

3% for every 1000 ft. above ft. .................................................600

Controller .............................................. H-panel



6-1

Standby Generator Sets

Specifications

GenSpec006 Rev. C 11/05

COLD WEATHER KIT

For cold climates, optional cold weather kit (part num-

ber 0F6148A) is recommended. The kit includes:

• Battery Warmer

• 4” Junction Box with hardware

• 700 Cold Cranking Amp Battery

• 6 qt. pack 5W-60 synthetic oil (engine)

• 1 qt. 75W90 synthetic gear oil (gear drive)



Figure 1 — Interconnections

6-2

Standby Generator Sets

Specifications

GenSpec006 Rev. C 11/05

5.4L & 6.8L IGNITION DESCRIPTION

This single-fire Ignition is intended to operate with

a 10-cylinder, 6.8L engine and an 8-cylinder, 5.4L

engine.

The 6.8L engine uses a 40-1 crank sensor, a mag-

pickup CAM sensor and individual coil-on-plug coils

for each spark-plug.

The 5.4L engine uses a 36-1 crank sensor, a mag-

pick-up CAM sensor and individual coil-on-plug coils

for each spark-plug.

With a single-fire ignition, each high-voltage coil out-

put is connected to one spark plug resulting in that

spark plug being fired only during the compression

cycle.

Engine Timing versus Engine Speed for the 6.8L

engine is:

RPM NG/LP Engine Timing (BTDC)

1800 rpm 22 degrees

3600 rpm 24 degrees

Engine Timing versus Engine Speed for the 5.4L

engine is:

RPM NG/LP Engine Timing (BTDC)

1800 rpm 26 degrees

3600 rpm 26 degrees

IGNITION POWER-UP INPUT ("56 LINE

INPUT")

When battery voltage is applied to this input the igni-

tion will power-up. For the ignition to power itself

down, battery voltage must be removed from this

input.

IGNITION ENABLE ("14 LINE INPUT")

This input must be connected to the +12V battery for

the ignition to turn-on the coils. If this input is con-

nected to battery ground the ignition will stop firing

the coils and will power down within approximately

2 seconds. In the event that an ignition fault has

occurred, however, the ignition will wait 60 seconds

before powering down. This allows time to view the

diagnostic LED located on the ignition board.



NOTE:

The ignition cover does not need to be removed to

see the LED.

IGNITION SHUTDOWN ON LOSS OF CRANK

OR CAM SIGNALS

The ignition will stop firing the coils immediately fol-

lowing the loss of the crank signal. The ignition will

stop firing the coils after approx. 3 seconds following

the loss of the cam signal.

DIAGNOSTIC BLINK PATTERNS (RED LED

LOCATED ON THE IGNITION CONTROL

BOARD)

During normal ignition operation the RED LED

flashes at a 0.5 sec ON and a 0.5 sec OFF rate. This

is considered one (1) blink.

LED Fault Code with Priority as shown:

1. No Crank Signal: LED blinks 2 times, is OFF for

3.0 seconds and then repeats

2. No CAM Signal: LED blinks 3 times, is OFF for

3.0 seconds and then repeats

Only one fault is displayed at a time. If multiple faults

exist then the highest priority fault must be resolved

prior to a lower priority fault being displayed. In the

event that an ignition fault has occurred the ignition

will wait 60 seconds before powering down.

NOTE:

The ignition cover does not need to be removed to

see the LED.



6-3

Standby Generator Sets

Specifications

GenSpec006 Rev. C 11/05

GENERATOR AC LEAD CONNECTIONS

See “Voltage Codes”. This generator may be rated

at any one of three voltages, either single-phase or

three-phase. The electrical wires in the unit’s AC con-

nection (lower) panel should be installed according to

the number of leads and the voltage/phase required

for the application. If there are any questions regard-

ing lead connection, refer to the wiring diagrams at

the back of this manual.

Voltage codes apply to the type of stator assembly

installed on a particular generator.

FOUR-LEAD, SINGLE-PHASE STATOR

Four-lead generators are built to supply electrical

loads with voltage code "A" (240V, 1-phase, 60Hz).

Electrical power is produced in the stator power

windings. These windings were connected at the fac-

tory to the main circuit breaker as shown in Figure

7.1.

The rated voltage between each circuit breaker ter-

minal is 240V. The rated voltage between each circuit

breaker terminal and the neutral point 00 is 120V.

Figure 7.1 — Four-lead, Single-phase Stator



ALTERNATOR POWER WINDING

CONNECTIONS

3-PHASE ALTERNATORS

The generator is designed to supply 3-phase electri-

cal loads. Electric power is produced in the alterna-

tor power windings. These windings were connected

at the factory to the main circuit breaker with a “Y”

configuration as shown in Figures 7.2 and 7.3.

The rated voltage between circuit breaker terminals

E1-E2, E1-E3 and E2-E3 is either 480V or 208V

depending on the model.

The rated voltage between each circuit breaker termi-

nal and the neutral point 00 is either 277V or 120V

depending on the model.

Figure 7.2 — Stator Power Winding

Connections - 3-phase, 277/480V (12 Lead)

S12 S11

S10

E3 L - N

L - L

Figure 7.3 — Stator Power Winding

Connections - 3-phase, 120/208V (12 Lead)

S10

S12

S11

S7 S1

L - N

L - L



7-1

Standby Generator Sets

General Information

ACConn002 Rev. 0 08/05

INSTALLATION

Refer to the separate “Installation Guide QT Product

Line” supplied with the unit.

PREPARATION BEFORE START-UP

The instructions in this section assume that the

standby generator has been properly installed, ser-

viced, tested, adjusted and otherwise prepared for

use by a competent, qualified installation contractor.

Be sure to read the “Safety Rules”, as well as all other

safety information in this manual, before attempting

to operate this (and related) equipment.

Before starting the generator for the first time, the

installer must complete the following procedures. For

follow-up maintenance information and/or service

intervals, please refer to the “Maintenance” section

and the “Service Schedule”.

TRANSFER SWITCH

If this generator is used to supply power to any elec-

trical system normally powered by an electric utility,

the National Electrical Code requires that a transfer

switch be installed. The transfer switch prevents elec-

trical backfeed between two different electrical sys-

tems. (For additional information, see the applicable

transfer switch manual for this unit.) The transfer

switch, as well as the generator and other standby

components, must be properly located and mounted

in strict compliance with applicable codes, standards

and regulations.

FUEL SYSTEM

Make sure the fuel supply system to the genera-

tor (a) delivers the correct fuel at the correct pres-

sure and (b) is properly purged and leak tested

according to code. No fuel leakage is permitted. See

“Specifications” for more information.

GENERATOR SET LUBRICATION

Check the engine crankcase oil level before operating

and add oil to the proper level – the dipstick “FULL”

mark. Never operate the engine with the oil level

below the dipstick “ADD” mark. See “Specifications”

and “Engine Oil Recommendations”.

NOTE:

This engine is shipped from the manufacturer

with “break-in” oil. This oil should be changed

after 30 hours of operation.

Check the oil level in the generator gearbox (if so

equipped) prior to initial use and at the intervals

indicated by the “Service Schedule.” The recom-

mended oil is SAE 90 gear lubricant.

Also, if the engine is equipped with a mechanical gov-

ernor, make sure the governor is properly lubricated

with clean engine oil.



PRIOR TO INITIAL START-UP

 Prior to initially starting the generator, it must

be properly prepared for use. Any attempt to

crank or start the engine before it has been

properly serviced with the recommended types

and quantities of engine fluids (oil, coolant, fuel,

etc.) may result in an engine failure.

ENGINE COOLANT

Have the engine cooling system properly filled with

the recommended coolant mixture. Check the system

for leaks and other problems. See “Specifications”

and “Coolant” sections.

BELT TENSION

Check-the engine-fan belt tension and condition prior

to placing the unit into service and at recommended

intervals. Belt tension is correct when a force of

approximately 22 pounds (10 kg), applied midway

between pulleys, deflects the belt about 3/8- to 5/8-

inch (10 to 16 mm).

ELECTRICAL SYSTEM

Make sure the generator is properly connected to an

approved earth ground.

Make sure the generator battery is fully charged,

properly installed and interconnected, and ready for

use.

NOTE:

Battery charger must be connected to 120 VAC, 15

amp circuit to operate.

Check to ensure that there are no loose electrical con-

nections. Restrain any loose wires to keep them clear

of any moving generator set components.

INITIAL INSPECTION FOR QT GENSET

STARTUP

Inspect for the following.

• Freight Damage.

• Manuals present.

• Fluid Levels (Oil, coolant, battery, Gear Drive).

• Correct fuel piping.

• Correct muffler installation for external applica-

tion.

• Adequate air flow, clearances and ventilation per

installation drawings and applicable codes.

• Correct AC and DC wire size, connections and

grounding. Control and communication wiring to/

from the transfer switch must be run in a separate

conduit from the AC power leads.



8-1

Standby Generator Sets

Installation

Install001 Rev. D 01/07

11-3

Standby Generator Sets

Service Schedule

SrvSchd001 Rev. B 03/07

Specyfikacje produktu

Marka:	Generac
Kategoria:	nieskategoryzowany
Model:	QT08054GNAN

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