Generac Power Systems 004988-2 Owner's Manual


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Generac Power Systems 004988-2 Owner's Manual | Manualzz

Owner’s Manual

Liquid-cooled, Prepackaged

Standby Generators

Model Number: 004988-2

This manual should remain with the unit.

ONLY QUALIFIED ELECTRICIANS OR CONTRACTORS

SHOULD ATTEMPT INSTALLATION!!

INTRODUCTION

Thank you for purchasing this model of the standby generator set product line by Generac Power Systems.

Every effort was expended to make sure that the information and instructions in this manual are both accurate and current at the time the manual was written. However, the manufacturer reserves the right to change, alter or otherwise improve this product(s) at any time without prior notice.

‹

READ THIS MANUAL THOROUGHLY

If any portion of this manual is not understood, contact the nearest Generac Authorized Service Dealer for starting, operating and servicing procedures.

Throughout this publication, and on tags and decals affixed to the generator, DANGER, WARNING,

CAUTION and NOTE blocks are used to alert personnel to special instructions about a particular service or operation that may be hazardous if performed incorrectly or carelessly. Observe them carefully. Their definitions are as follows:

DANGER

After this heading, read instructions that, if not strictly complied with, will result in personal injury or property damage.

After this heading, read instructions that, if not strictly complied with, may result in personal injury or property damage.

The operator is responsible for proper and safe use of the equipment. Generac strongly recommends that the operator read this Owner's Manual and thoroughly understand all instructions before using this equipment. Generac also strongly recommends instructing other users to properly start and operate the unit. This prepares them if they need to operate the equipment in an emergency.

‹

OPERATION AND MAINTENANCE

It is the operator's responsibility to perform all safety checks, to make sure that all maintenance for safe operation is performed promptly, and to have the equipment checked periodically by a Generac

Authorized Service Dealer. Normal maintenance service and replacement of parts are the responsibility of the owner/operator and, as such, are not considered defects in materials or workmanship within the terms of the warranty. Individual operating habits and usage contribute to the need for maintenance service.

Proper maintenance and care of the generator ensures a minimum number of problems and keep operating expenses at a minimum. See the Generac Authorized

Service Dealer for service aids and accessories.

Operating instructions presented in this manual assume that the standby electric system has been installed by a Generac Authorized Service Dealer or other competent, qualified contractor. Installation of this equipment is not a “do-it-yourself” project.

‹

HOW TO OBTAIN SERVICE

When the generator requires servicing or repairs, contact a Generac Authorized Service Dealer for assistance. Service technicians are factory-trained and are capable of handling all service needs.

When contacting a Generac Authorized Service

Dealer about parts and service, always supply the complete model number of the unit as given on the front cover of this manual or on the DATA LABEL affixed to the unit.

After this heading, read instructions that, if not strictly complied with, could result in damage to equipment and/or property.

NOTE:

After this heading, read explanatory statements that require special emphasis.

These safety warnings cannot eliminate the hazards that they indicate. Common sense and strict compliance with the special instructions while performing the service are essential to preventing accidents.

Four commonly used safety symbols accompany the

DANGER, WARNING and CAUTION blocks. The type of information each indicates is as follows:

!

This symbol points out important safety information that, if not followed, could endanger personal safety and/or property of others.

This symbol points out potential explosion hazard.

This symbol points out potential fire hazard.

This symbol points out potential electrical shock hazard.

AUTHORIZED SERVICE

DEALER LOCATION

To locate the nearest GENERAC AUTHORIZED

SERVICE DEALER, please call this number:

1-800-333-1322

OR

Locate us on the web at:

www.generac.com

Generac ® Power Systems, Inc.

Table of Contents

Guardian Liquid-cooled 27 kW and 30 kW Generators

INTRODUCTION ................................................IFC

SAFETY RULES ....................................................2

Section 1 — GENERAL INFORMATION ............4

1.1

Generator ..............................................................4

1.2

Transfer Switch ....................................................4

1.3

Automatic System Operation ................................4

1.4

Generator AC Connection Systems........................4

1.5

Main Circuit Breaker ............................................4

1.6

Generator Fuel System ..........................................5

1.7

Engine Protective Devices ......................................5

1.8

Unpacking ............................................................6

1.9

Lifting the Generator ............................................6

1.10 Specifications ........................................................7

1.11 Fuel Consumption ................................................7

1.12 Reconfiguring the Fuel System ..............................7

1.13 Torque Specifications ............................................8

1.14 Engine Oil Recommendations ..............................8

1.15 Coolant Recommendations....................................8

1.16 Before Installation ................................................8

Section 2 — INSTALLATION ............................8

2.1

Standby Generator Installation ............................8

2.2

Generator Location................................................9

2.3

Generator Mounting and Support ........................9

2.4

Basic Standby Electric System ..............................9

2.5

Emergency Circuit Isolation Method....................10

2.6

Total Circuit Isolation Method ............................10

2.7

Grounding the Generator ....................................10

2.8

Generator AC Neutral Connections......................10

2.9

Transfer Switch Start Signal Connections ..........10

2.10 Battery Installation ..............................................11

2.11 Preparation Before Start-Up ................................11

Section 3 — OPERATION ................................12

3.1

Using a Standard “GTS” Transfer Switch............12

3.2

Control Console Components..............................13

3.3

Manual Transfer and Startup ..............................14

3.4

Engine Governor Adjustments ............................14

3.5

Retransfer and Shutdown....................................14

3.6

Automatic Operation ..........................................14

3.7

Weekly Exercise Cycle..........................................14

Section 4 — MAINTENANCE ..........................15

4.1

Maintenance Performed by Authorized

Service Facilities ..................................................15

4.2

Cooling System....................................................15

4.3

Overload Protection for Engine DC

Electrical System ................................................15

4.4

Checking Fluid Levels ........................................16

4.5

Maintenance Owner/Operator

Can Perform ........................................................16

4.6

Miscellaneous Maintenance ................................18

4.7

Scheduled Maintenance ......................................20

Section 5 — TROUBLESHOOTING ..................23

Section 6 — NOTES ........................................24

Section 7 — INTALLATION DIAGRAM ............25

Section 8 — ELECTRICAL DATA ....................26

Section 9 — EXPLODED VIEWS AND

PARTS LISTS ..............................30

Section 10 — WARRANTY .................Back Cover

Generac ® Power Systems, Inc.

1

IMPORTANT SAFETY INSTRUCTIONS

Guardian Liquid-cooled 27 kW and 30 kW Generators

!

!

Study these SAFETY RULES carefully before installing, operating or servicing this equipment. Become familiar with this Owner’s Manual and with the unit. The generator can operate safely, efficiently and reliably only if it is properly installed, operated and maintained. Many accidents are caused by failing to follow simple and fundamental rules or precautions.

Generac cannot anticipate every possible circumstance that might involve a hazard. The warnings in this manual, and on tags and decals affixed to the unit are, therefore, not all-inclusive. If using a procedure, work method or operating technique that Generac does not specifically recommend, ensure that it is safe for others.

Also make sure the procedure, work method or operating technique utilized does not render the generator unsafe.

!

!

!

!

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.

!

SAVE THESE INSTRUCTIONS – This manual contains important instructions that should be followed during installation and maintenance of the generator and batteries.

!

!

GENERAL HAZARDS

!

WARNING:

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.

DANGER

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.

Parts of the generator are rotating and/or hot during operation. Exercise care near running generators.

• For safety reasons, Generac recommends that this equipment be installed, serviced and repaired by a

Generac Authorized Service Dealer or other competent, qualified 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 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 monoxide 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 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 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.

• 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.

2 Generac ® Power Systems, Inc.

IMPORTANT SAFETY INSTRUCTIONS

Guardian Liquid-cooled 27 kW and 30 kW Generators

• Inspect the generator regularly, and promptly repair or replace all worn, damaged or defective parts using only factory-approved parts.

• Before performing any maintenance on the generator, 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 conditions 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 generator. 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 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 equipment only while standing on such insulative mats.

• The National Electrical Code (NEC), Article 250 requires the frame and external electrically conductive parts of the generator to be connected to an approved earth ground and/or grounding rods. 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 maximum 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 possibly fatal electrical shock.

• Connecting this unit to an electrical system normally 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 operating. 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 NOR-

MAL (UTILITY) source voltage is removed or is below an acceptable preset level. To prevent such automatic start-up and possible injury to personnel, 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, immediately 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 implement, such as a dry rope or board, to free the victim from the live conductor. If the victim is unconscious, apply first aid and get immediate medical help.

• Never wear jewelry when working on this equipment.

Jewelry can conduct electricity resulting in electric shock, or may get caught in moving components 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 extinguisher 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 combustible materials are left in the generator compartment, or on or near the generator, as FIRE or EXPLOSION may result. Keep the area surrounding the generator clean and free from debris.

• Generac generator sets may operate using one of several types of fuels. All fuel types are potentially FLAM-

MABLE and/or EXPLOSIVE and should be handled with care. Comply with all laws regulating the storage and handling of fuels. Inspect the unit’s fuel system frequently and correct any leaks immediately. Fuel supply lines must be properly installed, purged and leak tested according to applicable fuel-gas codes before placing this equipment 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.

Generac ® Power Systems, Inc.

3

Section 1 - General Information

Guardian Liquid-cooled 27 kW and 30 kW Generators

1.1

GENERATOR

This equipment is a liquid-cooled, engine-driven generator set. The generator is designed to supply electrical power that operates critical electrical loads during utility power failure. The unit has been factory-installed in a weather resistant, all metal enclosure and is intended for outdoor installation only. Use this generator as a source of electrical power for the operation of 120 and/or 240VAC, single-phase loads.

!

If this generator is used to power electrical load circuits normally powered by a UTILITY power source, it is required by code to install a transfer switch. The transfer switch must effectively isolate the electric system from the utility distribution system when the generator is operating

(NEC 701). Failure to isolate an electrical system by such means results in damage to the generator and may also result in injury or even death to utility power workers due to backfeed of electrical energy.

1.2

TRANSFER SWITCH

This generator system may include a matched automatic transfer switch which is intended to be used in conjunction with the Generac generator. It is supplied in either a NEMA 1 enclosure or a NEMA 3R enclosure. The NEMA 1 enclosure is intended for indoor use only. The NEMA 3R enclosure is weather proof and can be used indoors or outdoors. Follow these rules:

• Install the transfer switch on a firm, sturdy supporting structure.

• To prevent switch distortion, level the switch if necessary. This can be done by placing washers between the switch enclosure and the mounting surface.

• Never install the switch where water or any corrosive substance might drip onto the enclosure.

• Protect the switch at all times against excessive moisture, dust, dirt, lint, construction grit and corrosive vapors.

If a transfer switch is not included, one may be purchased separately from a Generac Authorized Dealer.

1.3

AUTOMATIC SYSTEM OPERATION

When this generator, along with a transfer switch, has been installed and interconnected, a circuit board in the generator panel constantly monitors UTILITY power source voltage. Should that voltage drop below a preset value, and remain at such a low state for a preset amount of time, the generator cranks and starts. After the generator starts, the transfer switch transfers load circuits so the generator can power them.

When UTILITY source voltage has been restored, the switch re-transfers back to the UTILITY source voltage and the generator then shuts down.

Please reference the transfer switch manual for specific information.

1.4

GENERATOR AC CONNECTION

SYSTEMS

The generator was shipped from the factory with its stator AC output leads connected in a single-phase, three-wire generator AC connection system (Figure

1.1). The stator assembly in this system consists of a pair of stationary windings, with two leads brought out of each winding. Each single winding can supply

120VAC, 60 Hertz. When the two windings are connected in series, a 240VAC, 60 Hertz AC output results. Typically the two HOT leads in the circuit are wires 11 and 44. The NEUTRAL leads are the junction of Wires 22 and 33. The NEUTRAL is not grounded.

Figure 1.1 - Generator AC Connection System

1.5

MAIN CIRCUIT BREAKER

The generator’s main circuit breaker is included with the unit as shipped from the factory. The breaker for each unit is described in Figure 1.2.

Figure 1.2 - Main Circuit Breaker

Model

004988-2

Rating

27,000 NG

30,000 LP

Phase Actual Current

1

1

112.5

125.0

* Amp Rating of C/B structured under model.

C/B Rating*

150

150

4 Generac ® Power Systems, Inc.

Circuit Breaker

150A QN2

150A QN2

Section 1 - General Information

Guardian Liquid-cooled 27 kW and 30 kW Generators

1.6

GENERATOR FUEL SYSTEM

The unit has been factory tested and adjusted using a natural gas fuel system. If propane (LP) gas is necessary, contact an authorized service dealer.

Fuel pressure for a natural gas set up should be five inches to 14 inches of water column (0.18 to 0.5

psi) at all load ranges.

Fuel pressure for an LP vapor set up should be 11 inches to 14 inches of water column (0.4 to 0.5

psi) at all load ranges.

NOTE:

A seperate gas line and regulator may be needed to assure proper gas pressure to the generator.

Improper gas pressure can cause hard starting and affect engine durability.

!

Gaseous fuels such as natural and LP (propane) gas are highly explosive. Even the slightest spark can ignite such fuels and cause an explosion. No leakage of fuel is permitted. Natural gas, which is lighter than air, tends to collect in high areas. LP gas is heavier than air and tends to settle in low areas.

1.7

ENGINE PROTECTIVE DEVICES

The engine has several safety switches which cause the engine to automatically shut down under the following conditions: low oil pressure, high coolant temperature, engine overspeed, low coolant level or overcrank (Figure 1.3).

Figure 1.3 - Engine Protective Devices

Figure 1.4 - Low Oil Pressure Switch

NOTE:

The Low Oil Pressure, High Coolant Temperature and Low Coolant Level are not monitored for the first 10 seconds of engine run time.

‹

1.7.2

HIGH COOLANT TEMPERATURE

SWITCH

This normally open (N.O.) thermostatic switch has sensing tip which is immersed in captive coolant.

Should coolant temperature exceed about 230°F

(110°C), the switch contacts close. This causes the engine to shut down automatically and turns on the high coolant temperature/low coolant level LED

(Figure 1.5).

Figure 1.5- High Coolant Temperature Switch

LOW COOLANT

LEVEL SWITCH

LOW OIL

PRESURE

SWITCH

HIGH

COOLANT

TEMPERATURE

SWITCH

‹

1.7.1

LOW OIL PRESSURE SWITCH

This switch is normally-closed (N.C.) but is held open by engine oil pressure during engine running. Should operating oil pressure drop below about 8-10 psi

(55-68 kPa), the switch contacts close, the engine shuts down automatically, and the low oil pressure

LED is turned ON (Figure 1.4).

‹

1.7.3

LOW COOLANT LEVEL SWITCH

Should engine coolant level drop below the level of the high coolant temperature switch, it is possible for the engine to overheat without automatic shutdown.

To prevent such overheating without automatic shut down, the engine has a low coolant level sensor. If the engine coolant drops too low, the engine automatically shuts down and turns on the high coolant temperature/low coolant level LED (Figure 1.6 on page 6).

Generac ® Power Systems, Inc.

5

Section 1 — General Information

Guardian Liquid-cooled 27 kW and 30 kW Generators

Figure 1.6 - Low Coolant Level Sensor

‹

1.7.4

OVERSPEED SHUTDOWN

The engine control board receives AC frequency signals from an engine run winding in the alternator.

Should AC frequency exceed about 72 Hertz for three seconds or 75 Hertz instantaniously, the engine shuts down and the overspeed LED turns on. Should AC frequency exceed about 72 Hertz, circuit board action will automatically shutdown the engine (Figure 1.7).

Figure 1.7 - Printed Circuit Board Assembly

C27 Q2

R44

LED1

C9

C4

U7

D10

C21

C26

J2

C30

C2

RL2

R1

R48

D17

RL1

R49

U1

J1

L3

D19

906 REV.

0E4 PCB#

‹

1.7.5

RPM SENSOR LOSS

If the engine control board does not receive a proper rpm signal from the starter during cranking or running, it shuts down the engine on rpm sensor loss and flash the overspeed LED.

‹

1.7.6

OVERCRANK SHUTDOWN

The engine control board uses a cyclic cranking process when attempting to start the engine. The first crank cycle is a 15-second crank followed by a sevensecond rest. This is followed by five more crank cycles each with a seven-second crank followed by a seven-second rest.

If the engine fails to start after all six attempts, the start attempt is stopped and the overcrank LED’s illuminated.

6 Generac ® Power Systems, Inc.

‹

1.7.7

LOW BATTERY

The engine control board continually monitors the battery voltage and turns on the low battery LED if the battery voltage falls below 11.0 VDC for one minute. Low battery voltage is a non-latching alarm, which will automatically clear if the battery voltage rises above 11.0 VDC.

The control system will not attempt to start the engine if there is a low battery condition, however, if the engine is already running when the low battery condition occurs, the engine will continue to run as long as possible.

Battery voltage is NOT monitored during the crank cycle.

‹

1.7.8

ALARM RESET

If the engine control board shuts down the generator for any of the above reasons, the engine remains stopped until the alarm is cleared by placing the

AUTO/OFF/MANUAL switch into the OFF position.

‹

1.7.9

DC FUSES

These fuses are located on the front panel of the control system. They protect the panel wiring and components from damaging overload. Always remove the

15 amp main fuse before working on the generator.

The unit will not start or crank if this fuse is blown.

Replace the fuse with one of the same size, type, and rating (main AGC-15, battery charger AG4).

1.8

UNPACKING

‹

1.8.1 UNPACKING PRECAUTIONS

Handle shipping cartons and crates with care. Use care to avoid damage from dropping, bumping, collision, etc. Store and unpack cartons with the proper side up, as noted on the shipping carton.

‹

1.8.2 INSPECTION

After unpacking, carefully inspect the generator for any damage that may have occurred during shipment. If loss or damage is noted at the time of delivery, have the person(s) making delivery note all damage on the freight bill or affix their signature under the consignor’s memo of loss or damage.

1.9

LIFTING THE GENERATOR

!

When lifting or hoisting equipment is used, be careful not to touch overhead power lines. The generators weight of more than 900 pounds requires proper tools, equipment, and qualified personnel to be used in all phases of handling and unpacking.

Section 1 — General Information

Guardian Liquid-cooled 27 kW and 30 kW Generators

1.10 SPECIFICATIONS

‹

1.10.1 GENERATOR SPECIFICATIONS

Model

Rated Max. Cont.

AC Power Output (kW)

Rated voltage (volts)

No. of Rotor Poles

Driven Speed of Rotor

Rotor Excitation System

Type of Stator

Rotor/Stator Insulation

Single-phase

004988-2

27 (NG), 30 (LP)

120/240

4

1800

Direct excited brush type

4 Wire

Class F/H

‹

1.10.2 ENGINE SPECIFICATIONS

Make........................................................................................................Ford

Displacement ....................................................................................3.0 liters

Cylinder Arrangement ..............................................................................V-6

Valve Arrangement ................................................................Overhead Valve

Firing Order ..................................................................................1-4-2-5-3-6

Number of Main Bearings ............................................................................4

Compression Ratio ............................................................................9.3 to 1

No. of Teeth on Flywheel ..........................................................................164

Ignition Timing at 1800 rpm ..............................................30 degrees BTDC

Spark Plug Gap ..................................................................0.042-0.046 inch

Recommended Spark Plugs

Motor Craft ..........................................................................AG, SF 32PGM

Oil Pressure ....................................................................................40-50 psi

Crankcase Oil Capacity ........................................5.0 U.S. quarts (4.7 liters)

Recommended Engine Oil ..........................................................SAE 5W-20

Type of Cooling System ..................................Pressurized, closed recovery

Cooling Fan ................................................................................Pusher Type

Cooling System Capacity ..................................3.0 U.S. gallons (11.4 liters)

Recommended Coolant ............................................Use a 50-50 mixture of ethylene glycol base and de-ionized water.

1.11 FUEL CONSUMPTION

Natural Gas:

% of Load m3/hr ft3/hr

LP Vapor:

% of Load m3/hr ft3/hr

25%

3.1

110.3

25%

1.3

45.6

50%

5.9

209.0

50%

2.4

86.4

75%

8.5

299.5

75%

3.5

123.8

100%

11.0

387.0

100%

4.5

160.0

NOTE:

Fuel consumption is given at rated maximum continuous power output when using natural gas rated at 1000 Btu per cubic foot. LP gas is rated at 2520

Btu per cubic foot. Actual fuel consumption obtained may vary depending on such variables as applied load, ambient temperature, engine conditions and other environmental factors.

Fuel pressure for a natural gas set up should be five inches to 14 inches of water column (0.18 to 0.5

psi) at all load ranges.

Fuel pressure for an LP vapor set up should be 11 inches to 14 inches of water column (0.4 to 0.5

psi) at all load ranges.

1.12 RECONFIGURING THE FUEL

SYSTEM

NOTE:

All models are configured for natural gas from the factory.

To reconfigure the fuel system from NG to LP vapor, follow these steps:

1. Turn the main gas supply off.

2. Remove the carburetor fuel hose from the outlet port (Port 1) of the demand regulator (Figure

1.8).

3. Remove the brass hose fitting from the outlet port

(Port 1) of the demand regulator.

4. Remove pipe plug from Port 2.

5. Install brass hose fitting into Port 2.

6. Install pipe plug into Port 1.

7. Connect carburetor gas hose to brass fitting.

8. Tighten all clamps and plugs.

9. Make sure fuel supply is of the proper pressure and type for configuration.

10. Reverse the procedure to convert back to natural gas.

Figure 1.8 — Reconfigure the Fuel System

Port 1 Port 2

PLUG

FUEL HOSE

BRASS HOSE

FITTING

OUT

PORT 1

HOUSING

PORTS

FUEL HOSE

BRASS HOSE

FITTING

OUT

PORT 2

HOUSING

PORTS

PLUG

NG FUEL SYSTEM LP FUEL SYSTEM

NOTE:

Port 1 is for NG only and Port 2 is for LP vapor only. No provision for dual fuel has been made.

!

DANGER

Serious injury or damage may occur if not configured properly. Please consult an authorized

Generac Service Dealer with any questions.

Generac ® Power Systems, Inc.

7

Section 2 — Installation

Guardian Liquid-cooled 27 kW and 30 kW Generators

1.13 TORQUE SPECIFICATIONS

Cylinder Head ............................................15 (+ 90° + 90°) ft.lb.

Intake Manifold ................................................................13 ft.lb.

Exhaust Manifold..............................................................13 ft.lb.

1.14 ENGINE OIL RECOMMENDATIONS

The unit has been filled with 5W-20 engine oil at the factory. Use a high-quality detergent oil classified “For

Service CC, SD, SE, SF.” 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:

Temperature

Above 80° F (27° C)

32° to 80° F (-1° to 27° C)

Below 32° F (0° C)

Oil Grade (Recommended)

SAE 5W-20

SAE 5W-20

SAE 5W-20

NOTE:

Synthetic oil is highly recommended in any element with temperatures above 90° F or below 30° F.

!

Any attempt to crank or start the engine before it has been properly serviced with the recommended oil may result in an engine failure.

1.15 COOLANT RECOMMENDATIONS

Use a mixture of half low silicate ethylene glycol base anti-freeze and half de-ionized water. Cooling system capacity is about 12 U.S. quarts (11.4 liters). Use only de-ionized 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 chromiumhydroxide (“green slime”) forms and will cause overheating. Engines that have been operated 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. It is also recommend that any soluble oil inhibitor is NOT USED for this equipment.

1.16 BEFORE INSTALLATION

Before installing this equipment, check the ratings of both the generator and the transfer switch. Read

“Emergency Isolation Method” and “Total Circuit

Isolation Method” in Sections 2.6 and 2.6.

8 Generac ® Power Systems, Inc.

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.

This generator can be installed in conjunction with an engineered Generac “GTS” type transfer switch, if necessary.

The standard transfer switch has no sensing or controlling circuit boards. Instead, the generator control console houses a “Printed Circuit Board Assembly”, which controls all phases of operation, including engine start up and load transfer.

2.1

STANDBY GENERATOR

INSTALLATION

DANGER

Connecting this generator to an electrical system normally supplied by an electric utility shall be by means of a transfer switch, so as to isolate the electric system from the utility distribution system when the generator is operating.

Failure to isolate the electric 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 electrical energy.

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.

Only qualified, 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 noncompliance with such codes, standards and regulations.

‹

2.1.1 NFPA STANDARDS

The following published standards booklets pertaining to standby electric systems are available form the

National Fire Protection Association (NFPA),

Batterymarch Park, Quincy, MA 02269:

NOTE:

It is essential to use the latest version of any standard to ensure correct and current information.

Section 2 — Installation

Guardian Liquid-cooled 27 kW and 30 kW Generators

• NFPA No. 37, STATIONARY COMBUSTION

ENGINES AND GAS TURBINES.

• NFPA No. 76A, ESSENTIAL ELECTRICAL SYS-

TEMS FOR HEALTH CARE FACILITIES.

• NFPA No. 220, STANDARD TYPES OF BUILDING

CONSTRUCTION

• NFPA No. 68, GUIDE FOR EXPLOSION VENTING

• NFPA No. 70, NATIONAL ELECTRICAL CODE.

• NFPA No. 30, FLAMMABLE AND COMBUSTIBLE

LIQUIDS CODE.

• NFPA No. 10, INSTALLATION, MAINTENANCE AND

USE OF PORTABLE FIRE EXTINGUISHERS.

‹

2.1.2 OTHER PUBLISHED STANDARDS

In addition to NFPA standards, the following information pertaining to the installation and use of standby electric systems is available:

NOTE:

It is essential to use the latest version of any standard to ensure correct and current information.

• Article X, NATIONAL BUILDING CODE, available from the American Insurance Association, 85 John

Street, New York, N.Y. 10038.

• AGRICULTURAL WIRING HANDBOOK, obtainable from the Food and Energy Council, 909 University

Avenue, Columbia, MO, 65201.

• ASAE EP-364.2, INSTALLATION AND MAINTE-

NANCE OF FARM STANDBY ELECTRIC POWER, available from the American Society of Agricultural

Engineers, 2950 Niles Road, St. Joseph, MI 49085.

• A52.1, AMERICAN NATIONAL STANDARD FOR

CHIMNEYS, FIREPLACES AND VENTING SYS-

TEMS, available from the American National

Standard Institute, 1430 Broadway, New York, N.Y.

10018.

2.2

GENERATOR LOCATION

Install the generator set, in its protective enclosure outdoors, where adequate cooling and ventilating air always is available. Consider these factors:

• Install the unit where air inlet and outlet openings will not become obstructed by leaves, grass, snow, etc. If prevailing winds will cause blowing or drifting, consider using a windbreak to protect the unit.

• Install the generator on high ground where water levels will not rise and endanger it.

• This genset must be installed on a level surface.

The base frame must be level within 1/2 inch all around.

• Allow sufficient room on all sides of the generator for maintenance and servicing. A good rule is to allow five feet of space on all sides.

• Where strong prevailing winds blow from one direction, face the generator air inlet openings into the prevailing winds.

• Install the generator as close as possible to the transfer switch. This reduces the length of wiring and conduit.

• Install the generator as close as possible to the fuel supply, to reduce the length of piping. HOWEVER,

REMEMBER THAT LAWS OR CODES MAY REG-

ULATE THE DISTANCE.

2.3

GENERATOR MOUNTING AND

SUPPORT

Retain the generator compartment to a concrete slab with 1/4-inch masonry type anchor bolts. Be sure the bolts are long enough to retain the compartment. The slab should be at least six inches thick and should extend beyond the enclosure to a distance of at least three inches on all sides. See Section 6 for generator major dimensions.

2.4

BASIC STANDBY ELECTRIC

SYSTEM

Figure 2.1 shows a schematic diagram of a basic standby electric system. Both the UTILITY power supply and the STANDBY (GENERATOR) output are connected to an approved transfer switch. The transfer switch is required by electrical code and serves the following functions:

• Allows the LOAD circuits to be connected to only one power supply at a time.

• Prevents electrical backfeed between the generator and the UTILITY power circuits.

Notice that both the STANDBY and the UTILITY power supplies to the transfer switch are protected against overload by a main line circuit breaker.

Figure 2.1 – Basic Standby Electric System

Generac ® Power Systems, Inc.

9

Section 2 — Installation

Guardian Liquid-cooled 27 kW and 30 kW Generators

2.5

EMERGENCY CIRCUIT ISOLATION

METHOD

This prevents overloading the generator by keeping electrical loads below the wattage/amperage capacity of the generator. If the generator is powering only critical loads, within the wattage/amperage capacity, during utility power outages, consider using the emergency circuit isolation method.

Critical electrical loads are grouped together and wired into a separate “Emergency Distribution

Panel.” Load circuits powered by that panel are within the wattage/amperage capacity of the generator set.

When this method is used, it is difficult to overload the generator. The transfer switch must meet the following requirements:

• It must have an ampere rating equal to the total amperage rating of the emergency distribution panel circuit.

• Have it installed between the building’s main distribution panel and the emergency distribution panel.

2.6

TOTAL CIRCUIT ISOLATION

METHOD

When a generator capable of powering all electrical loads in the circuit is to be installed, use the “Total

Circuit Isolation Method.” It is possible for the generator to be overloaded when this isolation method is employed. The following apply to the transfer switch in this type of system.

• Ampere rating of the transfer switch must equal the ampere rating of the normal incoming utility service.

• The transfer switch is installed between the utility service entrance and the building distribution panel.

2.7

GROUNDING THE GENERATOR

The National Electrical Code requires the frame and external electrically conductive parts of this equipment to be properly connected to an approved earth ground and/or grounding rods. For that purpose, a

GROUND LUG (Figure 2.2) is provided on the generator mounting base. Consult a qualified electrician for grounding requirements in the area. Grounding procedures must meet local regulations.

Figure 2.2 – Generator Grounding Lug (typical)

GROUNDING

LUG

DANGER

Do not connect the ground wire to any pipe that carries a flammable or explosive substance

– FIRE or an EXPLOSION may result.

Proper grounding helps protect personnel against electrical shock in the event of a ground fault condition in the generator or in connected electrical devices. In addition, grounding helps dissipate static electricity that often builds up in ungrounded devices.

2.8

GENERATOR AC NEUTRAL

CONNECTIONS

Generac uses an UNGROUNDED AC neutral.

Grounding is recommended only at the main service entrance. If the neutral wire is grounded and one of the phase loads becomes grounded, the excessive current opens the load circuit breaker or collapses the generator field. The actual result depends on the electrical characteristics of the particular installed generator.

!

Failure to connect the generator neutral properly will result in unbalanced line-to-neutral voltages. Resulting high voltages will cause equipment damage.

2.9

TRANSFER SWITCH SIGNAL

CONNECTIONS

‹

2.9.1 PRE-PACKAGED ATS

If the generator is to be installed with a pre-packaged transfer switch, it is necessary to connect the control wires to the generator and set position two of the four-position dip switch to OFF.

Setting switch two to OFF allows the control PCB to perform the ATS control functions.

10 Generac ® Power Systems, Inc.

Section 2 — Installation

Guardian Liquid-cooled 27 kW and 30 kW Generators

Control system interconnections consist of N1 and

N2, and leads 23 and 194. Control system interconnection leads must be run in a conduit that is separate from the AC power lead. Recommended wire gauge sizes for this wiring depends on the length of the wire, as recommended below:

MAXIMUM WIRE LENGTH

460 feet (140m)

461 to 730 feet (223m)

731 to 1,160 feet (354m)

1,161 to 1,850 feet (565m)

RECOMMENDED WIRE

SIZE

No. 18 AWG.

No. 16 AWG.

No. 14 AWG.

No. 12 AWG.

‹

2.9.2 GTS-TYPE ATS

If the generator is to be installed with an automatic transfer switch, such as an engineered Generac GTStype switch, it is necessary to connect the two-wire start control system.

Connect the two-wire start signal from the automatic transfer switch to the automatic start connection, which is located in the middle, on the bottom, inside the control panel. Match wires 178 and 183 in the transfer switch to 178 and 183 on the terminal strip in the control panel. The conductors for the two-wire start circuit must be in their own conduit. (See

Section 3.1 for further explanation.)

2.10 BATTERY INSTALLATION

DANGER

!

!

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 flame, sparks or any spark producing tools or equipment near the battery.

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.

!

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.

!

Do not dispose of the battery in a fire. 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.

When replacing batteries, use the same number and type of battery. The recommended batteries are

Group 26, 12V negative ground 525 CCA/75 AH minimum capacity, or Group 27F, 12V negative ground

600 CCA/90 AH minimum capacity. 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 specific gravity or electrolyte level.

Have these procedures performed at the intervals specified in Section 4, “Maintenance.” 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 will result if the battery connections are made in reverse.

2.11 PREPARATION BEFORE START-UP

The instructions in this section assume that the standby generator has been properly installed, serviced, tested, adjusted and otherwise prepared for use by a competent, qualified installation contractor. Be sure to read the “Safety Rules” on Pages 2 and 3, as well as all other safety information in this manual, before attempting to operate this (and related) equipment.

Generac ® Power Systems, Inc.

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Section 3 — Operation

Guardian Liquid-cooled 27 kW and 30 kW Generators

‹

2.11.1 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.

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 Section 4, “Maintenance.”

‹

2.11.2 TRANSFER SWITCH

If this generator is used to supply power to any electrical system normally powered by an electric utility, the National Electrical Code requires that a transfer switch be installed. The transfer switch prevents electrical backfeed between two different electrical systems (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.

‹

2.11.3 FUEL SYSTEM

Make sure the fuel supply system to the generator (a) delivers the correct fuel at the correct pressure and

(b) is properly purged and leak tested according to code. No fuel leakage is permitted. See

“Specifications” (Section 1.10) for more information.

‹

2.11.4 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”

(Section 1.10) and “Engine Oil Recommendations”

(Section 1.14).

NOTE:

This engine is shipped from the manufacturer with 5W-20 oil. This oil should be changed after

30 hours of operation.

‹

2.11.5 ENGINE COOLANT

Have the engine cooling system properly filled with the recommended coolant mixture. Check the system for leaks and other problems. See “Specifications”

(Section 1.10) and “Coolant” (Section 1.15).

12 Generac ® Power Systems, Inc.

‹

2.11.6 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 5/8inch (10 to 16 mm).

‹

2.11.7 ELECTRICAL SYSTEM

Make sure the generator is properly connected to an approved earth ground and/or ground rod.

Make sure the generator battery is fully charged, properly installed and interconnected, and ready for use.

Check to ensure that there are no loose electrical connections. Restrain any loose wires to keep them clear of any moving generator set components.

3.1

USING A STANDARD “GTS”

TRANSFER SWITCH

When required, the pre-packaged standby generator can be installed with a standard Generac “GTS” type automatic transfer switch.

In this application, the GTS is responsible for utility sensing, weekly exercising, and load transferring.

Position two of the four-position dip switch is used to turn over this control to the GTS.

Pos2 ON — GTS Application

• The control board will NOT monitor utility.

• The control board will NOT perform a weekly exercise. (The five red LEDs will not flash in this mode.)

• The control board will NOT activate the transfer output.

• The control board WILL monitor all engine conditions and shut down on all the faults listed in this document.

Pos2 OFF — ATS Application

• The control board will perform all of the automatic features listed in this document.

• The two-wire start connections should NOT be used.

GTS Mode Operation

When in GTS mode, the control board will respond as follows based on the AUTO/OFF/MANUAL switch position.

OFF — The generator will not start and run in this position.

MANUAL — The control board will start and run the generator whenever the switch is in the manual position.

Section 3 - Operation

Guardian Liquid-cooled 27 kW and 30 kW Generators

AUTO — The control board will monitor the two-wire start circuit. When a two-wire start is issued the control board will immediately start and run the generator. Whe the two-wire start is removed the control board will immediately stop the generator.

NOTE:

If the generator is installed in conjunction with a standard GTS type transfer switch, refer to the applicable transfer switch manual for exact operating parameters and timing sequences.

3.2

CONTROL CONSOLE

COMPONENTS

The components of a home standby generator control console (Figure 3.1) are as follows:

‹

3.2.1 AUTO/OFF/MANUAL SWITCH

Use this three-position switch as follows:

• Set the switch to AUTO for fully automatic operation. See “Automatic Operation” (Section 3.5).

• Set switch to MANUAL position to crank and start the generator engine.

• Set switch to OFF position to shut down an operating engine. With OFF selected, operation will not be possible.

DANGER

!

With switch set to AUTO, engine can crank and start suddenly without warning. Such automatic start up normally occurs when utility source voltage drops below a pre-set level. To prevent possible injury that might be caused by such sudden starts, set AUTO/OFF/MANUAL switch to OFF before working on or around the unit.

Then, place a “DO NOT OPERATE” tag on control console.

Figure 3.1 - Home Standby Generator Panel

SET

EXECISER

TIME

SWITCH

4A FUSE

BATTERY

CHARGER

LED INDICATORS:

FLASHING GREEN LED = NO UTILITY SENSE

5 FLASHING RED LED'S = EXERCISER NOT SET

(IN AUTO MODE ONLY) SOLID GREEN LED = SYSTEM READY, UTILITY POWER ON

RED LED'S = INDIVIDUAL FAULT

(SEE OWNER'S MANUAL FOR COMPLETE LED DETAILS)

OVER CRANK

US

E

F

F

US

E

AUTO

OFF

OFF

ON

SET

EXERCISE

TIME

MANUAL

TO SET EXERCISER TIME

1) PLACE AUTO/OFF/MANUAL SWITCH TO AUTO POSITION.

0E7194

RED LED

GREEN LED

15A FUSE

MAIN

POWER

AUTO/OFF/MANUAL

SWITCH

‹

3.2.2 FAULT INDICATOR LED

This LED goes ON when one or more of the following engine faults occurs and when engine shuts down.

• Low Oil Pressure

• Overcrank

• Low Battery

• Overspeed/RPM Sensor Loss

• High Coolant Temperature/Low Coolant Level

See Section 1.7 for further explanation of engine protection functions.

‹

3.2.3 15 AMP FUSE

Fuse protects the control console’s DC control circuit against electrical overload. If the fuse has melted open because of an overload, engine cranking and startup cannot occur. If the fuse needs to be replaced, use only an identical 15-amp replacement fuse. (Type

AGC)

‹

3.2.4 4.0 AMP INLINE FUSE

This fuse protects the battery charger against electrical overload. If the fuse needs to be replaced, use only an identical 4 amp replacement fuse (type AG).

NOTE:

This fuse will not remove the + battery input power from the PCB when it opens. This means the exercise timer will not be reset.

‹

3.2.5 SET EXERCISE TIME SWITCH

This switch allows programming the generator to start and exercise automatically. “See Weekly

Exercise Cycle.”

‹

3.2.6 SYSTEM READY LED

The System Ready LED (green) has two main proposes. First, the LED will be ON when the

AUTO/OFF/MANUAL switch is in the AUTO position, utility is present, and there are no system alarms.

This ON state indicates the system is fully ready for automatic operation.

The system ready LED will be OFF when the switch is in the manual or OFF positions.

The system ready LED is also used to indicate the presence of utility sensing at the PCB when the switch is either in the AUTO or MANUAL modes. The LED will flash at the rate of 1/2 second on, 1/2 second off if the utility sensing level is below the transfer back threshold.

This secondary function is only available with dip switch two in the OFF position (standard ATS application).

Generac ® Power Systems, Inc.

13

Section 3 — Operation

Guardian Liquid-cooled 27 kW and 30 kW Generators

3.3

MANUAL TRANSFER AND

START-UP

To transfer electrical loads to the Standby (EMER-

GENCY) power source side and start the engine manually, refer to the Owner’s Manual of the particular transfer switch.

3.4

ENGINE GOVERNOR

ADJUSTMENTS

Engine speed governing is also controlled by the engine control board. Connector J2 on the engine control board interfaces with a governor driver module and the Bosch throttle body. The engine governor has been set by the factory during final testing of the generator and, in most cases, should not be adjusted.

If, however, adjustments are necessary, or a new engine control board is installed in the generator, the following procedure should be followed (Figure 3.2):

1. Set all three potentiometers (pots) fully counterclockwise.

2. Under no load condition, increase the GAIN pot as much as possible without causing instability.

3. Apply 1/4, 1/2, 3/4 and full load to the unit.

Decrease the GAIN pot if there is instability at any load point.

4. Under full load condition, increase the stability pot until the unit returns to 60 Hertz (or 50 Hertz in 50 Hertz applications).

Figure 3.2 — Engine Governor Adjustment

LED1

C9

C27 Q2

R44

C4

U7

D10

C21

C26

J2

C30

C2

RL2

R1

R48

D17

RL1

R49

U1

J1

L3

D19

PCB# 0E4906 REV.

0 0

DIFFERENTIAL

STABILITY

1

3

2

4

DIP SWITCH

UNUSED

GTS/ATS

50/60 HZ

POSITION 1

50/60 HZ

ON = 50 HZ

OFF = 60 HZ

POSITION 2

GTS/ATS Select

ON = GTS

OFF = ATS (standard mode)

5. Reduce load to 3/4, 1/2, 1/4 and no load.

Decrease the stability pot if there is instability at any load point.

6. Adjust differential pot to make the recovery to load changes even faster and minimize load change undershoot and overshoot. If it is set too high it may introduce oscillations at some load. It can be set to zero (full CCW) if a small amount causes oscillations at some load.

3.5

RETRANSFER AND SHUTDOWN

When utility power source voltage has been restored, electrical loads may be transferred back to that source and the generator can be shut down as follows:

• Verify that UTILITY power supply voltage to the transfer switch has been positively turned OFF, using whatever means provided (such as utility main line circuit breaker).

• Set the generator’s main circuit breaker to its OFF or OPEN position.

• Let the generator engine run at no-load for a few minutes, to stabilize internal unit temperatures.

• On the generator console, set the AUTO/OFF/

MANUAL switch to OFF. Wait for engine to come to a complete stop.

• For transfer to utility position, refer to the Owner’s

Manual of the particular transfer switch.

• Turn on the UTILITY power supply to the transfer switch, using whatever means provided (such as a utility main line circuit breaker). The UTILITY power source now powers the loads.

3.6

AUTOMATIC OPERATION

To set the system for fully automatic operation, proceed as follows:

• Check that load circuits are connected to the utility power supply.

• Set the AUTO/OFF/MANUAL switch to its AUTO position.

• Set the generator main circuit breaker to its ON or

CLOSED position.

3.7

WEEKLY EXERCISE CYCLE

The engine control board will start and run the generator once every seven days for approximately 12 minutes. If utility should fail during this exercise period, the engine control board will transfer the load to the generator output and continue to run until utility returns.

On the day, and at the time of day chosen for the generator to exercise, set the weekly exercise cycle as follows:

1. Place the AUTO/OFF/MANUAL switch in the

AUTO position.

14 Generac ® Power Systems, Inc.

Section 4 — Maintenance

Guardian Liquid-cooled 27 kW and 30 kW Generators

2. Press and hold the “Set Exercise” switch for three seconds, then release.

At this time all five red LEDs will flash for approximately 10 seconds, then the engine will start and run for it’s 12 minute exercise period, then shut down.

The generator will now start and run each week at the same time.

If DC power to the control board is lost, the weekly exercise setting will be lost. This is indicated by all five red LEDs continually flashing. In this state the generator will still start and run in manual mode, or automatically start and run if UTILITY is lost while in

Auto mode, but it will not perform a weekly exercise cycle.

If a failure occurs while running in this mode, the five red LEDs will stop flashing, the individual fault LED will turn on and the engine will shut down. Once the

AUTO/OFF/MANUAL switch has been switch to OFF, the individual fault LED will turn OFF and the five red LEDs will begin flashing to show exercise has still not been set.

Figure 3.2 - “Set Exercise” Switch

FUSE

4A

BAT.

CHARGER

E

F

US

US

F

E FUSE

15A

MAIN

S

E

F

US

FU

F

U

E

AUTO

OFF

OFF

ON

SET

EXERCISE

TIME

MANUAL

4.1

MAINTENANCE PERFORMED BY

AUTHORIZED SERVICE FACILITIES

A. EVERY THREE MONTHS

1. Check battery state of charge and condition.

2. Inspect and test fuel system.

3. Check transfer switch.

4. Inspect exhaust system.

5. Check engine ignition system.

6. Check fan belts.

B. ONCE EVERY SIX MONTHS

1. Test Engine Safety Devices (low oil pressure, low coolant level, high coolant temperature).

C. ONCE ANNUALLY

1. Test engine governor. Adjust or repair, if needed.

2. Clean, inspect generator.

3. Flush cooling system.

D. FIRST 100 OPERATING HOURS

1. Change engine oil and oil filter. (After initial change, service engine oil and filter at 150 operating hours or 6 months, whichever comes first.)

2. Retorque cylinder head. (See Torque Specs,

Section 1.13.)

3. Retorque intake and exhaust manifold. (See

Torque Specs, Section 1.13.)

E. EVERY 500 OPERATING HOURS

1. Service air cleaner.

2. Check starter.

3. Check engine DC alternator.

4.2

COOLING SYSTEM

Air intake and outlet openings in the generator compartment must be open and unobstructed for continued proper operation. This includes such obstructions as high grass, weeds, brush, leaves and snow.

Without sufficient cooling and ventilating air flow, the engine/generator quickly overheats, which causes it to shut down. (See Section 6 for installation drawings and vent locations.)

The exhaust system parts from this product get extremely hot and remain hot after shutdown.

High grass, weeds, brush, leaves, etc. must remain clear of the exhaust. Such materials may ignite and burn from the heat of the exhaust system.

4.3

OVERLOAD PROTECTION FOR

ENGINE DC ELECTRICAL SYSTEM

Engine cranking, start up and running are controlled by a solid state Engine Controller circuit board.

Battery voltage is delivered to that circuit board via a

15 amp fuse. These overcurrent protection devices will open if the circuit is overloaded.

!

If a circuit breaker opens or a fuse element melts, find the cause of the overload before resetting the circuit breaker or replacing the fuse.

Generac ® Power Systems, Inc.

15

Section 4 — Maintenance

Guardian Liquid-cooled 27 kW and 30 kW Generators

4.4

CHECKING FLUID LEVELS

‹

4.4.1 CHECK ENGINE OIL

Check engine crankcase oil level (Figure 4.1) at least every 20 hours of operation, or prior to use.

• Remove oil dipstick and wipe dry with a clean, lint-free cloth.

• Install oil dipstick, then remove again.

• Oil should be between FULL and ADD marks.

• If oil level is below the dipstick ADD mark, remove oil fill cap. Add the recommended oil to bring oil level up to the FULL mark. DO NOT FILL ABOVE

THE “FULL” MARK. See Section 1.14 for recommended oils.

Figure 4.1 - Oil Dipstick and Oil Fill Cap

OIL

DIPSTICK

OIL

FILL

‹

4.4.2 BATTERY FLUID

Check battery electrolyte fluid at least once weekly.

Fluid should cover separators in all battery cells. If fluid level is low, add distilled water to cover tops of separators. DO NOT USE TAP WATER IN BATTERY.

‹

4.4.3 ENGINE COOLANT

Check coolant level in coolant recovery bottle. See

Specifications, Section 1.10.

• Add recommended coolant mixture as necessary.

• Periodically remove radiator pressure cap to make sure the coolant recovery system is functioning properly. Coolant should be at bottom of radiator filler neck. If coolant level is low, inspect gasket in radiator pressure cap. Replace cap, if necessary.

To have pressure cap tested, contact an authorized

Generac Service Dealer. Inspect cooling system and coolant recovery system for leaks.

4.5

MAINTENANCE OWNER/

OPERATOR CAN PERFORM

‹

4.5.1 CHECK ENGINE OIL LEVEL

Refer to “Checking Fluid Levels” in Section 4.4.

‹

4.5.2 CHECK BATTERY

• Check battery fluid level each week as outlined under “Check Fluid Levels”.

• Check battery cables for condition, tightness, corrosion or damage. Clean, tighten or replace as necessary.

‹

4.5.3 EXERCISE SYSTEM

Start the generator engine at least once every seven days and let it run at least 20 minutes. See Section

3.6, “Weekly Exercise Cycle”.

‹

4.5.4 INSPECT COOLING SYSTEM

• Inspect engine cooling system at least once each month.

• Check hoses for damage, deterioration, leaks, etc.

Correct any discrepancies found.

• Check hose clamps for tightness.

‹

4.5.5 CHECK ENGINE COOLANT LEVEL

See “Checking Fluid Levels” in Section 4.4.

‹

4.5.6 PERFORM VISUAL INSPECTION

Complete a thorough visual inspection of the entire engine-generator monthly. Look for obvious damage, loose, missing or corroded nuts, bolts and other fasteners. Look for fuel, oil or coolant leaks.

‹

4.5.7 INSPECT EXHAUST SYSTEM

Inspect the exhaust system at least once every three months. Check all exhaust system pipes, mufflers, clamps, etc. for condition, tightness, leaks, security, damage.

‹

4.5.8 CHECK FAN BELT

• Inspect fan belts every three months. Replace any damaged, deteriorated, worn or otherwise defective belt.

• Check fan belt tension. Thumb pressure, exerted midway between pulleys, should deflect about 3/8 to 5/8 inch. Adjust belt tension as required.

‹

4.5.9 INSPECT ENGINE GOVERNOR

Visually inspect electronic governor.

16 Generac ® Power Systems, Inc.

Section 4 — Maintenance

Guardian Liquid-cooled 27 kW and 30 kW Generators

!

DANGER

Do not attempt to adjust the governor. Only qualified service facilities should adjust the governor. Excessively high operating speeds are dangerous and increase the risk of personal injury. Low speeds impose a heavy load on the engine when adequate engine power is not available and may shorten engine life. Correct rated frequency and voltage are supplied only at the proper governed speed. Some connected electrical load devices may be damaged by incorrect frequency and/or voltage. Only qualified service technicians should adjust the governed speed.

‹

4.5.10 CHANGING ENGINE OIL

Refer to maintenance performed by authorized service facilities for engine oil and filter change frequencies.

Drain the oil while the engine is still warm from running. This means warm up the engine, shut it down and drain immediately as follows:

1. Remove OIL DRAIN HOSE from its retaining clip.

2. Loosen and remove OIL DRAIN HOSE CAP. Drain oil completely into suitable container.

3. When all oil has drained, install and tighten OIL

DRAIN HOSE CAP, and re-install into its retaining clip.

4. Turn OIL FILTER (Figure 4.2) counterclockwise and remove. Dispose of old filter.

5. Apply light coating of new engine oil to seal of new oil filter. Install FILTER and tighten by hand only.

DO NOT OVERTIGHTEN.

6. Remove OIL FILL CAP. Add recommended oil (see

SPECIFICATIONS). DO NOT FILL ABOVE THE

DIPSTICK “FULL” MARK. Crankcase oil capacity is 4.0 U.S. quarts (3.8 liters).

Figure 4.2 - Oil Filter

!

After refilling the crankcase with oil, always check oil level on dipstick. NEVER OPERATE

ENGINE WITH OIL BELOW THE DIPSTICK “ADD”

MARK.

7. Start engine and check for oil leaks.

‹

4.5.11 CHANGING THE ENGINE AIR CLEANER

To replace the engine air cleaner, (part number

059402), remove the air cleaner cover and replace the air filter making sure it is positioned properly before reattaching the cover (Figure 4.3).

Figure 4.3 – Engine Air Cleaner

See the “Service Schedule,” Section 6, for air cleaner maintenance.

‹

4.5.12 SPARK PLUGS

Reset the spark plug gap or replace the spark plugs as necessary. See Section 6.

1. Clean the area around the base of the spark plugs to keep dirt and debris out of the engine. Clean by scraping or washing using a wire brush and commercial solvent. Do not blast the spark plugs to clean.

2. Remove the spark plugs and check the condition.

Replace the spark plugs if worn or if reuse is questionable. See the “Service Schedule,” Section

6, for recommended inspection.

3. Check the spark plug gap using a wire feeler gauge. Adjust the gap to 1.06-1.16 mm (0.042-

0.046 inch) by carefully bending the ground electrode (Figure 4.4).

OIL FILTER

Generac ® Power Systems, Inc.

17

Section 4 — Maintenance

Guardian Liquid-cooled 27 kW and 30 kW Generators

Figure 4.4 – Setting the Spark Plug Gap

SET PLUG GAP AT 1.06-1.16 mm

(0.042-0.046 inch)

‹

4.5.13 COOLANT CHANGE

Every year, have Authorized Service Facility drain, flush and refill the cooling system. See SPECIFICA-

TIONS (Section 1.10) for cooling system recommendations.

4.6

MISCELLANEOUS MAINTENANCE

‹

4.6.1 CLEANING THE GENERATOR

Keep the generator as clean and as dry as possible.

Dirt and moisture that accumulates on internal generator windings have an adverse effect on insulation resistance.

Periodically clean generator exterior surfaces. A soft brush may be used to loosen caked on dirt. Use a vacuum system or dry, low pressure air to remove any accumulations of dirt. The generator is housed inside an all-weather enclosure, clean the enclosure with a soft, damp cloth or sponge and water.

Once each year, have the generator cleaned and inspected by an Authorized Service Dealer. That dealer will use dry, low pressure air to clean internal windings. Parts inside the control console should be cleaned and inspected at this time as well.

Finally, have the insulation resistance of stator and rotor windings checked. If insulation resistances are excessively low, the generator may require drying.

‹

4.6.2 BATTERY

All lead-acid storage batteries discharge when not in use. Refer to specific instructions and warnings that accompany the battery. If such information is not available, observe the following precautions when handling a battery:

• DO NOT use jumper cables and a booster battery to crank or start the generator engine.

• DO NOT recharge a weak battery while it is installed in the generator. Remove battery from generator and recharge in a well-ventilated area, away from fuel vapors, sparks, heat or flames.

18 Generac ® Power Systems, Inc.

• Battery electrolyte fluid is an extremely caustic sulfuric solution that can cause severe burns. DO

NOT permit fluid to contact eyes, skin, clothing, painted surfaces, wiring insulation, etc. If any battery fluid is spilled, flush the affected area with clear water immediately.

• Always wear safety glasses, rubber apron and gloves when handling a battery.

• Batteries give off explosive hydrogen gas while charging. The gas can form an explosive mixture around the battery for several hours after charging.

Any spark, heat or flames can ignite the gas and cause an explosion which can shatter the battery, causing blindness or other serious injury.

‹

4.6.3 BATTERY MAINTENANCE

The battery should be inspected per the “Service

Schedule,” Section 6. The following procedure should be followed for inspection:

1. Inspect the battery posts and cables for tightness and corrosion. Tighten and clean as necessary.

2. Check the battery fluid level of unsealed batteries and, if necessary, fill with DISTILLED WATER

ONLY. DO NOT USE TAP WATER IN BATTERIES.

3. Have the state of charge and condition checked.

This should be done with an automotive-type battery hydrometer.

DANGER

!

!

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 flame, sparks or any spark producing tools or equipment near the battery.

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 the fluid is spilled, flush the affected area immediately with clear water.

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.

Section 4 — Maintenance

Guardian Liquid-cooled 27 kW and 30 kW Generators

!

Do not use any jumper cables or booster battery to crank and start the generator engine. If the battery has completely discharged, remove it from the generator for recharging.

!

Be sure the AUTO/OFF/MANUAL switch is set to the OFF position before connecting the battery cables. If the switch is set to AUTO or MANUAL, the generator can crank and start as soon as the battery cables are connected.

Be sure the UTILITY power supply is turned off, or sparking may occur at the battery posts as the cables are attached and cause an explosion.

‹

4.6.4 BATTERY REPLACEMENT

When replacing batteries, use the same number and the type of battery that follows:

BCI Group No.

26/26R

27

CCA

525 @ 0 deg. F

600 @ 0 deg. F

NOTE:

The BCI number should be located directly on the battery.

Part Name

Oil Filter

Radiator Cap

Air Cleaner

Spark Plug

PERIODIC REPLACEMENT PARTS

Generac’s Part Number

# 0E7180

# 046627

# 0C8127

# 0E7079

Generac ® Power Systems, Inc.

19

Section 4 — Maintenance

Guardian Liquid-cooled 27 kW and 30 kW Generators

4.7

SCHEDULED MAINTENANCE

Following is a recommended maintenance schedule for Generac small standby and residential generator sets. The established intervals in the schedule are the maximum recommended when the unit is used in an average service application. They will need to be decreased (performed more frequently) if the unit is used in a severe application.

Use the unit hour meter or calendar time, whichever occurs first, from the previous maintenance interval to determine the next required maintenance interval.

Service Maintenance Interval Information:

The various service maintenance intervals are designated by interval numbers as follows:

1 An early inspection of the generator set to ensure it is ready to operate when required and to identify any potential problem areas.

Performed monthly or following each 10 hours of operation of the unit and requires approximately .5 manhours per unit to complete.

This inspection may be performed by the end user providing the following safety steps are taken to prevent the engine from starting automatically without warning:

To prevent injury, perform the following steps in the order indicated before starting any maintenance:

Disable the generator set from starting and/or connecting to the load by setting the control panel

AUTO-OFF-MANUAL switch to the “OFF” position.

Remove the control panel fuse.

Turn off the battery charger.

Remove the negative battery cable.

The battery charger must be turned off BEFORE removing the battery cable to prevent an over current condition from burning out sensitive control panel components and circuits.

Following all maintenance, reverse these steps to insure the unit is returned to standby setup for normal operation when required.

2 A break-in service inspection of the generator set to ensure it is ready to operate and carry the load when required, and to identify any potential problem areas.

Performed ONLY ONCE following the first three months or the first 30 hours of operation after purchase of the unit and requires approximately 2.5 man-hours per unit to complete.

This inspection contains some maintenance tasks which require special tools, equipment, and/or knowledge to accomplish and should be performed only by an authorized Generac Service Dealer.

3 An operational inspection of the generator set to ensure it is ready to operate and carry the load when required, and to identify any potential problem areas.

Performed semi-annually or following each 50 hours of operation of the unit and requires approximately 1.5

man-hours per unit to complete.

This inspection contains some maintenance tasks which require special tools, equipment, and/or knowledge to accomplish and should be performed only by an authorized Generac Service Dealer.

4 A mid-level inspection of the generator set to ensure it is ready to operate and carry the load when required, and to identify any potential problem areas.

Performed annually or following each 100 hours of operation of the unit and requires approximately 4.0

man-hours per unit to complete.

This inspection contains some maintenance tasks which require special tools, equipment, and/or knowledge to accomplish and should be performed only by an authorized Generac Service Dealer.

20 Generac ® Power Systems, Inc.

Section 4 — Maintenance

Guardian Liquid-cooled 27 kW and 30 kW Generators

Maintenance

Tasks

1. Disable the unit from operating per the first page warning.

2. Check the engine oil level.

Adjust as necessary.

3. Check the engine coolant level. Adjust as necessary.

4. Check the engine coolant thermal protection level.

Correct as necessary.

5. Check the natural gas delivery system on gas engine driven units.

Tighten connections as necessary.

6. Check the air inlets and outlets for debris. Clean as necessary.

7. Check the battery electrolyte level if accessible. Adjust as necessary.

8. Check the battery posts, cables, and charger for loose connections, corrosion, and proper operation. Correct as necessary.

9. Check the unit wiring for loose connections, corrosion, and damage.

Correct as necessary.

10. Check the engine accessory drive belts for wear, weather cracking, and damage. Replace as necessary.

11. Visually inspect the unit looking for leaks, wear or damage, loose connections or components, and corrosion. Correct as necessary.

12. Test the engine and transfer switch safety devices. Correct and/or adjust as necessary.

Level 1 Level 2 Level 3 Level 4

RecomTask Required Task Required Task Task mended Comp.

to be done Comp.

to be done Comp.

Required Comp.

to be done (Date3 months/ (DateSemi(Dateto be done (Datemonthly/ Initials) Break-in Initials) annually/ Initials) Annually/ Initials)

10 hrs.

30 hrs.

50 hrs.

100 hrs.

Generac ® Power Systems, Inc.

21

Section 4 — Maintenance

Guardian Liquid-cooled 27 kW and 30 kW Generators

Maintenance

Tasks

13. Initiate an automatic start and transfer of the unit to site load and exercise it for at least 1 hour looking for leaks, loose connections or components, and abnormal operating conditions. Correct as necessary.

14. Start and exercise the unit at full rated load (use a load bank if the site load is not enough) for at least 2 hours looking for leaks, loose connections or components, and abnormal operating conditions.

Correct as necessary.

15. Change the engine oil.

16. Replace the engine oil filter(s).

17. Replace the engine air filter(s).

18. Replace the engine fuel filter(s) on diesel engine driven units and re-prime the fuel system.

19. Check the engine spark plugs on gas engine driven units. Clean and re-gap or replace as necessary.

20. Perform a 5 minute no-load operational run of the unit looking for any post service problems.

21. Return the unit to standby setup for operation when required.

Level 1 Level 2 Level 3 Level 4

RecomTask Required Task Required Task Task mended Comp.

to be done Comp.

to be done Comp.

Required Comp.

to be done (Date3 months/ (DateSemi(Dateto be done (Datemonthly/ Initials) Break-in Initials) annually/ Initials) Annually/ Initials)

10 hrs.

30 hrs.

50 hrs.

100 hrs.

22 Generac ® Power Systems, Inc.

Section 5 — Troubleshooting

Guardian Liquid-cooled 27 kW and 30 kW Generators

TROUBLESHOOTING POINTS

PROBLEM

Engine won’t crank.

CAUSE

1. 15 amp fuse blown.

2. Loose or corroded or defective battery cables.

3. Defective starter contactor.

4. Defective starter motor.

5. Dead or Defective Battery.

6. 4 amp fuse blown.

Engine cranks, but won't start 1. Out of fuel.

2. Fuel solenoid (FS) is defective

3. Open Wire #14 from Engine Control circuit board.

4. Spark plugs defective.

Engine starts hard, runs rough.

Engine starts, then shuts down.

AUTO/OFF/MANUAL Switch at,

OFF engine continues to run

No AC output from generator.

1. Flame arrestor (air cleaner) plugged or damaged.

2. Plugged fuel line.

3. Defective spark plugs.

1. Engine oil level is low.

2. Engine is overheated.

3. Defective Low Oil Pressure Switch

4. Defective Coolant Temperature Switch

5. Defective Control Module circuit board.

6. Coolant Level is Low.

7. Defective Low Coolant Level Switch

1. Defective AUTO/OFF/MANUAL switch

2. Open/disconnected wire #15A between

AUTO/OFF/MANUAL switch and Control

Module circuit board.

3. Defective Control Module circuit board

1. Check main line circuit breaker.

2. Check circuit breaker & fuses.

3. Transfer switch set to NORMAL position

4. Generator internal failure.

5. Thermal circuit breaker open.

CORRECTION

1. Replace fuse.

2. Tighten, clean or replace battery cables as necessary.

3. Replace contactor.

4. Replace starter motor.

5. Remove, change or replace battery.

6. Replace fuse.

1. Replenish fuel.

2. Replace solenoid.

3. Reconnect wire.

4. Clean, regap or replace plugs.

1. Clean or replace as needed.

2. Unclog fuel line.

3. Clean, regap or replace plugs.

1. Check oil and add oil as needed.

2. Check cooling system for leaks.

3. Replace switch.

4. Replace switch.

5. Replace board.

6. Repair leak - Add coolant.

7. Replace Switch.

1. Replace switch.

2. Reconnect/close wire.

3. Replace board.

1. Reset to ON or CLOSED.

2. Reset and replace, if necessary.

3. Set to GENERATOR position.

4. Contact an Authorized Generac facility.

5. Auto-reset - Wait 5 min. and attempt restart.

Generac ® Power Systems, Inc.

23

Section 6 - Notes

Guardian Liquid-cooled 27 kW and 30 kW Generators

24 Generac ® Power Systems, Inc.

Section 7 — Installation Diagram

Guardian Liquid-cooled 27 kW and 30 kW Generators

Installation Diagram — Drawing No. 0E8695

Generac ® Power Systems, Inc.

25

Section 8 - Electrical Data

Guardian Liquid-cooled 27 kW and 30 kW Generators

Wiring Diagram — Engine — Drawing No. 0E6199-F

NOTE: SIZE (AWG)

ALL WIRES ARE 18 AWG 300

VOLT UL LISTED UNLESS

OTHERWISE NOTED AS SHOWN: 16

OA

13A

1b

1

1a

16

16

239

15A

15

2b

2a

1

85

RL1

13A

F2

16

15

13

13

F1

14

225A

224A

8

1

2

7

4

5

3 6

178

178

TB1

0

0

14

225

224

TR2

TR1

0

55

14

0

0

BA

11

44

55

66

1

4

2

5

6

1 2 3 4 5 6

IC

11

CB1

44

NB

NEUTRAL

TRANSFER SWITCH

CUSTOMER CONNECTION

LEGEND:

AVR -

BA -

B/C -

BC1 -

CB1 -

CB2 -

D1 -

F1 -

AUTOMATIC VOLTAGE REGULATOR

BRUSH ASSEMLY (GENERATOR)

BATTERY CHARGER

BULKHEAD CONNECTOR 1 (ENGINE)

CIRCUIT BREAKER (OUTPUT)

CIRCUIT BREAKER (EXCITATION)

DIODE [FIELD BOOST]

FUSE, BAT. POWER (15A AGC TYPE)

26 Generac ® Power Systems, Inc.

6

6

6

6

44

11

22

33

STATOR

CB2

AVR

6

14

4

5

1

2

3

162

1

162

11

4

44

6

55

0

0

0

2

D1

4

4

23

66

LEGEND {CONT.]:

F2 FUSE, B/C (4A AGC TYPE)

ICT -

NB -

RL1 -

SW1 -

SW2 -

INTERCONNECT. TERMINAL BLOCK

NEUTRAL BLOCK

RELAY 1

AUTO/OFF/MANUAL SWITCH

SET EXERCISER SWITCH

TB1 -

TR1 -

TR2 -

TERMINAL BLOCK 1

TRANSFORMER 1 (56 VA 240/16 VAC)

TRANSFORMER 2 (6 VA 240/16 VAC)

14

16

16

0

BC1

14

224

225

239

0

0

0A

13

14A

15A

15E

3

4

5

6

7

8

9

2

1

10

11

12

23

66

Section 8 - Electrical Data

Guardian Liquid-cooled 27 kW and 30 kW Generators

Wiring Diagram — Engine — Drawing No. 0E6199-F

23

66

2

3

4

5

6

7

8

PCB J2

1 767

765

769

766

768

0

N/C

14

4

5

6

2

3

7

8

9

10

11

12

13

14

1

PCB J1

56

86

15A

23

224

0

239

15E

85

14A

225

66

3

4

5

2

1

6

7

8

9

10

11

12

C1

0

14

224

225

239

0

0

0A

13

14A

15A

15E

16

14

16

16

86

0

0

23

66

LEGEND:

ALT -

BAT -

C1 -

CC -

DEG -

FS -

GND1-

GND2-

GOV -

D.C. CHARGE ALTERNATOR

12VDC BATTERY

CONNECTOR 1 (ENGINE)

STARTER CONTACTOR

DRIVER ELEC. GOVERNOR

FUEL SOLENOID

GROUND (SENSING/LOW AMP)

GROUND (POWER/HIGH AMP)

ELEC. GOVERNOR ACTUATOR

NOTE: SIZE (AWG)

ALL WIRES ARE 18 AWG 300

VOLT UL LISTED UNLESS

OTHERWISE NOTED AS SHOWN:

CC JB

0

BAT

16

13

13

4

4

FS

0

13

0

0

10

10

0

0A

0

0

14

-

+

85

85

BLK

RED

10

10

4

16

16

16

4

SM

16

16

16

0

0

14

14

14

ALT

GND1

HCT

WLS

16

14

14

0

449

449

14

0

0

DEG

765

766

14

766

765

767

770

771

768

767

769

GOV

771

767

765

770

N/C

766

16

16

16

16

3

2

111

5

3

4

5

6

2

1

5

6

7

8

9

10

11

12

2

1

3

4

IC

IM

6

1

3

4

5

2

LEGEND [CONT.]:

HCT HIGH COOLANT TEMP SWITCH

IC IGNITION COIL

IM -

J-1 -

J-2 -

JB -

LOS -

SM -

WLS -

IGNITION MODULE (ON DISTRIBUTOR)

JUNCTION 1 (ON PCB)

JUNCTION 2 (ON PCB)

JUNCTION BLOCK (RUN POWER)

LOW OIL PRESSURE SWITCH

STARTER MOTOR

COOLANT LEVEL SWITCH

Generac ® Power Systems, Inc.

27

Section 8 - Electrical Data

Guardian Liquid-cooled 27 kW and 30 kW Generators

Electrical Schematic — Engine — Drawing No. 0E6200-B

LEGEND:

AR -

AS -

AVR -

BA -

B/C -

BCW -

CB1 -

CB2 -

D1 -

DPE -

ALTERNATOR ROTOR

ALTERNATOR STATOR

AUTOMATIC VOLTAGE REGULATOR

BRUSH ASSEMLY (GENERATOR)

BATTERY CHARGER

BATTERY CHARGE WINDING

CIRCUIT BREAKER (OUTPUT)

CIRCUIT BREAKER (EXCITATION)

DIODE [FIELD BOOST]

DISPLACED PHASE EXCITATION

RL1 -

SW1 -

SW2 -

TR1 -

TR2 -

LEGEND {CONT.]:

F1 FUSE, BAT. POWER (15A AGC TYPE)

FUSE, B/C (4A AGC TYPE) F2 -

ICT -

NB -

TERMINAL BLOCK, INTERCONNECT.

NEUTRAL BLOCK

RELAY 1

SWITCH, AUTO/OFF/MANUAL

SWITCH, SET EXERCISER

TRANSFORMER 1 (56 VA 240/16 VAC)

TRANSFORMER 2 (6 VA 240/16 VAC)

66

0

0

RL1

14A

14

BCW

15

15

14

14

55 66

F2

BA

4

1

AR

5

4

6

5

1

D1

4

6

DPE

2 2

CB2

162

11

44

N1

N2

11 22

AS

33 44

CB1

E1 00

NB

CUSTOMER CONNECTION

120/240V 1-PHASE

E3

TRANSFER SWITCH

CONNECTION

2

3

4

1

5

6

AVR

224A

1 2 3

1 2

225A

23

194

183

178

TR1

ICT

13A

0A

15

15

F1

224

225

13

13

15

194

183

178

3

2

1

TR2

SW2

1 2

15

15A

178

4

5

6

239

SW1

IN OFF POSITION

2a

SHOWN

0

0A

13

0

0

14A

15A

15E

14

224

225

239

10

11

12

1

2

3

4

5

6

7

8

9

66

23

28 Generac ® Power Systems, Inc.

66

23

13

14A

15A

15E

14

0

0A

0

0

224

225

239

10

11

12

3

4

5

6

2

1

7

8

9

Section 8 - Electrical Data

Guardian Liquid-cooled 27 kW and 30 kW Generators

Electrical Schematic — Engine — Drawing No. 0E6200-B

85

14

0

0

86

13

LOS

FS

CC

56

16

13

0

CC

ALT

0

239

15E

85

14A

225

66

56

86

15A

23

224

0

J1-1

J1-2

J1-3

J1-4

J1-5

J1-6

J1-7

J1-8

J1-9

J1-10

J1-11

J1-12

J1-13

J1-14

PCB

J2-1

J2-2

J2-3

J2-4

J2-5

J2-6

J2-7

J2-8

1

2

3

4

5

6

GOV

771

767

765

770

N/C

766

767

765

769

766

768

0

N/C

14

LEGEND:

ALT -

C1 -

CC -

DEG -

FS -

GOV -

HCT -

D.C. CHARGE ALTERNATOR

CONNECTOR 1 (ENGINE)

CRANKING CONTACTOR

DRIVER ELEC. GOVERNOR

SOLENOID FUEL

ELEC. GOVERNOR ACTUATOR

SWITCH, HIGH COOLANT TEMP

WLS HCT

0

13

16

14

SC

12V BATTERY

) (+

RED

(-)

BLACK

SM

SC

6

IC

14

3

5

6

2

1

4

IM

DEG

0

765

766

14

766

765

767

770

771

768

767

769

4

5

6

7

8

9

10

11

12

2

3

1

0

LEGEND [CONT.]:

IC -

IM -

IGNITION COIL

LOS -

SC -

IGNITION MODULE (ON DISTRIBUTOR)

SWITCH LOW OIL PRESSURE

CONTACTOR, STARTER MOTOR

SM -

WLS -

STARTER MOTOR

SENSOR, COOLANT LEVEL

Generac ® Power Systems, Inc.

29

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Mounting Base — Drawing No. 0E6266-E

30 Generac ® Power Systems, Inc.

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Mounting Base — Drawing No. 0E6266-E

ITEM PART NO.

QTY.

16

17

18

20

21

11

12

13

14

15

8

9

6

7

10

3

4

1

2

5

22

23 *

24 *

25 *

26 *

30

049814

046526

022131

075763

050331

050331A

0A4010

052858

061902

059473

049820

055414

026850

022097

022473

049813

0A1694

052213

025507

027482

022129

0E5822

052860

052251

052257

052252

052259

052891

0536210213

074906

047411

045771

051756

046526

022131

055934M

077483

058665

038804D

038805AA

021991

39

40

41

42

43

44

34

35

36

37

38

31

32

33

* NOT SHOWN-USED TO HOLD DOWN I/N 32

2

1

1

2

1

1

2

1

1

1

2

REF.

REF.

1

1

1

1

1

1

1

1

3

2

4

1

1

1

2

1

2

1

1

1

4

4

1

4

4

1

4

4

DESCRIPTION

BASEFRAME, WELDMENT 3.0L FORD

NUT FLANGED HEX M12-1.75

DAMPENER VIBRATION 40 BLUE

SPACER .49 X .62 X 1.87 PWDR/ZNC

DAMPENER VIBRATION

WASHER FLAT M12

SCREW HHC M12-1.75 X 80 G8.8

ASSY GRNDWIRE 11"/3/8 & 5/16 LUG

SCREW HHTT M6-1.0 X 20 BP

SCREW HHC M6-1.0 X 16 BP

LUG SLDLSS #2-#8 X 17/64 CU

WASHER SHAKEPROOF EXT 1/4 STL

WASHER LOCK M6-1/4

WASHER FLAT M6-1/4 ZINC

NUT HEX M6 -1.0 G8 YEL CHR

1-1/2" BUTTON PLUG

SCREW HHC M10-1.25 X 20 G8.8

WASHER SHAKEPROOF EXT 7/16 STL

WASHER SHAKEPROOF EXT 5/16 STL

WASHER LOCK M8-5/16

NUT HEX M8-1.25 G8 YEL CHR

SCREW HHC M10-1.5 X 20 G8.8

WASHER LOCK M10

WASHER FLAT 3/8-M10 ZINC

CLAMP VINYL .75 X .343 Z

BATT 12VDC 75-AH 26

BATT 12VDC 90-AH 27F

CABLE BATT RED #4 X 20.00

CABLE BATT BLK #4 X 30"

EARTH STRAP

SCREW HHC M10-1.5 X 25 G8.8

WASHER LOCK M10

WASHER FLAT 3/8 ZINC

BOOT BATTERY CABLE

BATTERY POST COVER BACLK -

BATTERY POST COVER RED +

SCREW HHC M8-1.25 X 60 G8.8 FT

NUT TOP LOCK FL M8-1.25

HOLD DOWN BATTERY

HOLD DOWN BATTERY

NUT HEX LOCK M8-1.25 NY INS

Generac ® Power Systems, Inc.

31

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Compartment — Drawing No. 0E8333-D

32 Generac ® Power Systems, Inc.

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Compartment — Drawing No. 0E8333-D

ITEM PART NO.

QTY.

DESCRIPTION

36

37

38

39

40

31

32

33

34

35

26

27

28

29

30

21

22

23

24

25

16

17

18

19

20

11

12

13

14

15

8

9

6

7

10

3

4

1

2

5

51

52

53

54

55

41

42

43

44

50 *

56

57

58

59

* ALL ITEMS NOTATED WITH "AI" ARE COMPONENTS OF 0E8441

070015

0E7662

0D2537A

0D2537

0D2023

0E7869

0E8001

0E8060

0E8406

0D3037A

0C7781

0E7794

0E8052

0D3037

0E8007

0E8008

0E6989

0E8055

026850

0912970063

089961

0A2115

0E8404

0D2538A

0D2538

043116

022097

022473

0E7570

0E7571

0E8411

0E8042

0E8041

0C2454

0E8402

0E7808

0E7809

0E8387

0E6986

0E7795

0912970064

049813

0E8665

0D2023

0E8441

0E7829A

0E7829B

0E7829P

0E7829R

0E7829S

0E7829T

0E7829N

0E7829U

078115

1

4

1

1

2

1

1

2

1

1

1

1

2

1

1

1

1

4

4

2

8

12

12

2

4

1

1

2

4

1

1

2

1

1

1

1

1

1

62

1

4

2

1

2

1

1

1

2

2

1

2

8

1

2

INTAKE DUCT HSB

DUCT DISCHARGE RH FRONT

DUCT DISCHARGE LH FRONT

SCREW TH-FRM M6-1 X 16 N WA Z/JS

BAFFLE REAR BOTTOM

POST CORNER LH REAR

POST CORNER RH REAR

BAFFLE REAR TOP

DOOR COMPARTMENT SIDE

SUPPORT, R/H SIDE

FOAM STRIP 3/4" WIDE X 3/16" THK (40" LG)

WASHER NYLON .257

BRACKET STIFFENER RH FRONT

HINGE LIFT OFF TYPE B KNUCKLE

HINGE LIFT OFF TYPE B PIN

SCREW HHC M6-1.0 X 12 G8.8

WASHER LOCK M6-1/4

WASHER FLAT 1/4-M6 ZINC

GAS SPRING

BALL STUD GAS SPRING MOUNT

NUT HEX 5/16-18 LOCK

SCREW WING M6-1.00 X 25

HINGE LIFT OFF TYPE A KNUCKLE

HINGE LIFT OFF TYPE A PIN

TRIM VINYL SELF GRIPPING (91" LG)

BRACKET STIFFENING BACK

MUFFLER BOX

ROOF W/GAS SPRING MNT 3.0L FRD

BRACE FRONT TOP

LATCH 1/4 TURN NONLOCKING

PAWL DOOR HSB

SUPPORT LH SIDE

MUFFLER BOX TOP

LATCH QUARTER TURN LOCKING

POST CORNER LH FRONT

POST CORNER RH FRONT

BRACE FRONT BOTTOM

DUCT DISCHARGE MID FRONT

WASHER SHAKEPROOF EXT 1/4 STL

ASSY GRD WIRE 99HSB

ASSEMBLY BASE-DOOR GROUND WIRE

NUT HEX M6 X 1.0 G8 YEL CHR

BRACKET STIFFENER LH FRONT

TRIM VINYL SELF GRIPPING (165.5"LG)

KIT INSULATION 3.0L HSB

AI ROOF PANEL 1

AI DOOR PANEL

AI CORNER POST PANEL 1

AI CORNER POST PANEL 2

AI SUPPORT LH PANEL

AI SUPPORT RH PANEL

AI ROOF PANEL 2

AI BRACE PANEL

WASHER SELF LOCKING DOME

Generac ® Power Systems, Inc.

33

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Control Panel — Drawing No. 0E7118-K

34 Generac ® Power Systems, Inc.

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Control Panel — Drawing No. 0E7118-K

28

29

30

31

25

26

27

32

33

34

35

36

16

17

18

19

20

11

12

13

14

15

21

8

9

6

7

10

3

4

1

2

5

22

23

24

0E2514

0A9457

0E7539

046357 *

0D3719B

057073

0E7283

0E3628

0E3664

0E7539A

0D4698 *

0E7252

0C1229

060015

054199

0C2657

099076

040213

0E9668

067680

0E6875A

0E6881 *

0C5139 *

0C5142 *

0E7195

0E7196

0E7197

0E7193

0E7194

0E4494

082573

032300

022676

067682B

0E3161

054450

0D5070A

1

1

1

REF.

1

1

1

1

1

1

REF.

1

1

1

1

1

REF.

REF.

1

1

1

1

2

REF.

2

1

1

1

1

1

1

1

1

1

1

1

1

ITEM PART NO.

QTY.

DESCRIPTION

CONTROL BOX HSB

COVER FRONT PANEL HSB

COVER TOP PANEL HSB

DECAL WARNINGS HSB

DECAL CONTROLS HSB

SWITCH ROC DPDT ON-OFF-ON

SWITCH ROCKER DPST 125V SPD

HOLDER FUSE

FUSE 15A X AGC15

FUSE 4A SLO BLO GLASS

FITTING CONDUIT 90D 3/8"

DECAL DANGER HIGH VOLTAGE

TRANSFRMR 16V 6VA

TRANSFORMER 16V 56VA

PCB SUPPORT SNAP-IN 1/4"

ASSY PCB HSB CONTROLLER

ASSY VOLTAGE REGULATOR 60HZ

RELAY 12VDC C FORM W/DIODE

SOCKET RELAY

CONN DEUTSCH RECEPT GY/FLN

CONN DEUTSCH RECEPT WDGE

BLKHD

ASSY BOSCH GOV DRIVER

CIRCT BRK 5.5 X 1 ETA 46-500-P

ASSY 2A 12V UL BATTERY

CHARGER

FITTING CONDUIT STR 1-1/2"

DECAL NEUTRAL

DECALCUSTOMER CNNCTN XFER

SW

BLOCK TERM 20A 6 X 6 X 1100V

DECAL CUSTOMER CNNCTN

JUNCTION BLOCK 3/8-16

CB 0150A2P240V S QN2 LL

CB 0200A2P240V S QN2 LL

BASE QN CIRCUIT BREAKER

DECAL TB1 HSB CONTROL PANEL

BLOCK TERM 20A 6 X 3 X 1100V

BRACKET CB 221.5 X 102

DECAL WARNING ELECTRICAL

SHOCK

ITEM PART NO.

QTY.

DESCRIPTION

40

41

42

37

38

39

56

57

58

59

60

51

52

53

54

55

43

44

45

46

47

49

50

65

66

67

68

69

61

62

63

64

0C1127

0A1441B

0E7128

0E7358

074908

0C5141

0C2699

0C2323

022155

0C2265

022264

020911

066849

022152

023897

051716

090388

042568

022097

022473

0441140187

070370

023762

055444

030468

049939

022158

022985

038750

0A2115

0C2454

0F6146

1

1

1

8

6

1

11

4

15

4

4

2

2

4

2

2

8

6

2

2

4

3

1

1

1

1

1

1

2

4

4

1

* ITEMS INCLUDED AS PART OF I/N 39

DECAL AVR COVER

COVER PLATE, AVR

HARNESS CNTRL PNL (NOT

SHOWN)

SCREW PPPH HI-LO #4-24 X 3/8

SCREW HHTT M5-0.8 X 10 BP

CONN DEUTSCH GASKET 8/12 POS

DT

SCREW PHTT #6-32 X 3/8 ZYC

SCREW PHTT #6-32 X 5/8 ZYC

WASHER LOCK #6

SCREW PHTT M4-0.7 X 12 ZYC

WASHER LOCK #8-M4

SCREW PPHM M5-0.8 X 30 ZINC

SCREW HHTT M5-0.8 X 16

WASHER LOCK #10

WASHER FLAT #10 ZINC

NUT HEX M5-0.8 G8 YEL CHR

SCREW HHTT M6-1.0 X 12 ZINC

SCREW HHC M6-1.0 X 20 G8.8

WASHER LOCK M6-1/4

WASHER FLAT 1/4-M6 ZINC

WIRE ASSY 3" X (2) 3/16" TABS

WASHER MICA .203

WASHER SHAKEPROOF EXT #10

STL

HEATSINK

WASHER STEP NYLON .20

RECTIFIER MSC 12A 600V 1N1206R

NUT HEX #10-32 STEEL

WASHER FLAT #6 ZINC

SCREW HHC M6-1.0 X 30 G8.8

WASHER NYLON .257

SCREW THF M6-1 X 16 N WA Z/JS

HANG TAG 2 WIRE START (NOT

SHOWN)

Generac ® Power Systems, Inc.

35

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Engine — Drawing No. 0E8170-N

69

27

28

60

2

58

57

61

42

24

25

55

68

24

25

60

51

58

57

86

1

39

35

36

30

31

32

63

64

65

39

35

17

GROUND

WIRE

66

16

85

6

42

43

42

49

47

4

78

49

46

47

18

2

42

81

38

42

81

15

14 84

2

38

10

8

3

36

7

36

35

37

33

82

8

40

36

35

34

6

5

BAFFLE

REAR UPPER

12

47

26

73

11

29

30

48

44

48

45

42

41

19

36 Generac ® Power Systems, Inc.

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Engine — Drawing No. 0E8170-N

9 **

10

11

12

14

15

16

17

4

7

8

5

6

1

2

3

38

39

40

41

42

33

34

35

36

37

43

44

45

46

28

29

30

31

32

24

25

26

27

18

19

20

21

0E6202

0E8824

0E8963

0E9020

0A1232

0A7801B

0A5610

0E6308

0E7804

0D3488F

0E7996

0E8006

035606

0E0561

0E6729

0E6703

0E6667

0E5048

035579

0A8584

047411

040976

022129

022145

045771

051756

049821

059980

0D5417

046526

083896

084929

055597

077996

057823

056739

047411

022097

022473

022131

059982

098780

051769

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

1

11

4

2

3

6

16

4

REF.

18

4

4

24

22

1

6

6

1

1

6

1

1

6

6

1

1

1

1

ITEM PART NO.

QTY.

DESCRIPTION

ENGINE 3.0L FORD (RD) (MAKE)

STAMPING ENG FOOT 3.0L FORD

PULLEY CRANKSHAFT 3.0L FORD

RD

BRACKET DC ALT 3.0L FORD

D.C. ALTERNATOR ASSY

PULLEY POLY-V 82 OD.

BRACKET ALTERNATOR

PULLEY WATERPUMP 3.0L FORD

(RD)

HARN IGNITION 3.0L FORD (NOT

SHOWN)

BELT SERPENTINE 38.35

CLUTCH COOLING FAN FORD

FAN 18" 7 BLADE STEEL ECS

SENSOR HI COOLANT SHUTDOWN

ASSY WATER LEVEL SENSOR C/E

PL

STARTER DELCO-REMY 12V

COVER FLYWHEEL ACCESS 3.0L

HSB

ENGINE ADAPTER 3L FORD

FLEXPLATE 3.0L FORD

BUSHING REDUCER 1/4 TO 1/8

SWITCH OIL PRESSURE 10PSI

2POL

WASHER LOCK 1/4-M6 SS

WASHER FLAT 1/4 SS

SCREW HHC M12-1.75 X 85 G8.8

CAP HOSE

CLAMP HOSE #10 .56-1.06

RELAY SOLENOID 12VDC PNL MNT

SCREW HHC M6-1.0 X 16 G8.8

WASHER LOCK M6-1/4

WASHER FLAT 1/4-M6 ZINC

SCREW HHC M6-1.0 X 16 G8.8

SCREW SHC M8-1.25 X 20 G12.9

WASHER LOCK M8-5/16

WASHER FLAT 5/16-M8 ZINC

NUT HEX M8-1.25 G8 YEL CHR

SCREW HHC M10-1.5 X 20 G8.8

SCREW SHC M8-1.25 X 30 G12.9

SCREW HHC M10-1.5 X 25 G10.9

SCREW HHC M10-1.0 X 25 G10.9

WASHER LOCK M10

WASHER FLAT 3/8-M10 ZINC

SCREW SHC M12-1.75 X 45 G10.9

SCREW HHC M12-1.75 X 65 G8.8

WASHER LOCK M12

ITEM PART NO.

QTY.

DESCRIPTION

53

54

55

56

47

48

49

50

51

57

58

60

61

62

78

79

83

84

85

86

87

80

81

82

76

77

67

68

69

70 *

71 *

63

64

65

66

72

73

74

75

049808

051430

045773

0E6203C

0E6679

049226

091526

093278

0E6517

0E7163

0E5527

0E7202

085296

0E6203D

057772

057765

043790

069860C

057822

069811

026925

065852

0A2111

057073

066849

022152

0E7880

0E7880A

0E7880B

055934C

027482

0E8940

0A7387

022097

022473

055934H

0F5966

022985

036261

2

6

3

1

2

7

3

4

1

2

2

2

6

1

1

1

1

1

2

1

1

1

1

1

2

2

2

4

1

1

1

4

1

3

4

2

1

2

3

WASHER FLAT M12

WASHER SHAKEPROOF INT 1/2

NUT HEX M12-1.75 G8 YEL CHR

COIL IGNITION 3.0L FORD

BRACKET IGN COIL 3.0L FORD

WASHER LOCK M5

SCREW PPHM M5-0.8 X 12 ZNC

SCREW HHTT M5-0.8 X 25 BP

HARNESS ENGINE 3.0L FORD HSB

(NOT SHOWN)

GASKET EXHAUST 3.0L FORD

MANIFOLD EXHAUST 3.0L FORD

HEAT SHIELD 260 X 80 HOT

SCREW HHC 1/4-20 X 1/2 SS

WIRE SET 3.0L FORD (NOT

SHOWN)

WASHER NYLON .565

ADAPTER M14-1.50 X 3/8 NPT

BARBED EL 90 3/8 NPT X 3/8

HOSE OIL DRAIN ASSY 21"

CLAMP HOSE #8 .53-1.00

CAP HEX 1/4 NPT BRASS

PLUG STD PIPE 3/8 STEEL SQ HD

SPRING CLIP HOLDER .37-.62

SCREW SWAGE 10-32 X 5/16 Z/YC

JUNCTION BLOCK 3/8-16

SCREW HHTT M5-0.8 X 16

WASHER LOCK #10

CLIP SPARK PLUG 3P SCREW-

MOUNT (NOT SHOWN)

CLIP SPARK PLUG 2P SCREW-

MOUNT (NOT SHOWN)

CLIP SPARK PLUG 3P FREEHANG

(NOT SHOWN)

CLAMP VINYL .5 X .406 Z

WASHER SHAKEPROOF EXT 5/16

STL

SPACER FLEXPLATE HSB

SCREW HHC M10-1.5 X 40 G10.9

WASHER LOCK M6-1/4

WASHER FLAT 1/4-M6 ZINC

CLAMP VINYL .62 X .406 Z

REFLECTIVE HEAT SHIELD 3.0L FD

WASHER FLAT #6 ZINC

RIVET POP .125 X .275 SS

* NOT SHOWN-USED TO HOLD OIL DRAIN ASSEMBLY.

** NOT SHOWN

Generac ® Power Systems, Inc.

37

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Radiator — Drawing No. 0E8528-B

38 Generac ® Power Systems, Inc.

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Radiator — Drawing No. 0E8528-B

ITEM

17

18

20

21

22

11

12

13

14

15

23

24

25

26

27

8

9

6

7

10

3

4

1

2

5

PART NO.

045772

035685

0E8562

058443

0C2454

048031C

029032

046627

069811

065852

0E9947

0E6340

0E8531

0E6398

0E6397

080713

076749

049814

022131

046526

0A2111

052250

035461

0C7649

069860C

QTY.

1

1

1

1

1

1

4

4

4

9

1

1

1

2

1

4

8

1

1

4

2

1

1

1

1

DESCRIPTION

RADIATOR R-IN,L-OUT 658X489X49

VENTURI 3.0L FORD HSB

SIDE SUPPORT RADIATOR HSB

TUBE LOWER RAD 3.0L FORD HSB

HOSE UPPER RAD 3.0LFORD HSB

BRACKET COOLANT TANK

TANK COOLANT RECOVERY

SCREW HHC M10-1.5 X 25 G8.8

WASHER FLAT 3/8-M10 ZINC

WASHER LOCK M10

NUT HEX M10-1.5 G8 YEL CHR

CLAMP HOSE #28 1.32-2.25

FAN GUARD HSB

SCREW CRIMPTITE 1/4-20 X 5/8

SCREW TH-FRM M6-1 X 16 N WA Z/JS

CLAMP HOSE BAND 1/4

HOSE 9/32 ID (30" LG)

CAP RADIATOR

CAP HEX 1/4 NPT BRASS

SPRING CLIP HOLDER .37-.62

SCREW SWAGE 10-32 X 5/16 Z/YC

TAPE FOAM 1 X 1 (27" LG)

BARBED STR 1/4 NPT X 3/8

CLAMP HOSE .38-.87

HOSE OIL DRAIN ASSY 21"

Generac ® Power Systems, Inc.

39

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Fuel System — Drawing No. 0E8190-C

40 Generac ® Power Systems, Inc.

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Fuel System — Drawing No. 0E8190-C

ITEM PART NO.

QTY.

34

35 **

36 **

37 **

38 **

39

40

41

42

43

29

30

31

32

33

21

25

26

27

28

16

17

18

19

20

11

12

13

14

15

8

9

6

7

10

1 *

2

3

4

5

* SHOWN IN OTHER VIEW

** NOT SHOWN-USED TO HOLD #31 IN PLACE

049099

055934M

047411

022097

O22473

0E9295A

0E6382A

0E7121

0E6376A

0F2119

057753B

047487

022097

051751

035685

057823

047290

047290

0A4121

0E6609

0E1056

0E6584

057823

059194

044117

0D1509

050279

0E6123

0E6586

0E4395

---------

075580

0E7691

039253

022145

022129

045771

042907

0C2454

026307

1

1

1

1

1

1

1

1

1

1

1

1

4

1

1

8

4

1

4

2

1

1

1

1

1

2

1

1

1

1

2

2

4

2

1

1

2

1

1

2

DESCRIPTION

WELDMENT MOUNTING BASE

FLANGE FUEL INLET

ASSY REGULATOR 3.0L NG OR LPV

SCREW HHC M8-1.25 X 20 G8.8

WASHER FLAT 5/16 ZINC

WASHER LOCK M8-5/16

NUT HEX M8-1.25 G8 YEL CHR

SCREW HHC M8-1.25 X 16 G8.8

SCREW TH-FRM M6-1 X 16 N WA Z/JS

ELBOW 90D STREET 3/4

FUEL HOSE ASSY NAT.GAS/L.P.V.

BRACKET REGULATOR 3.0L FORD HSB

CLAMP HOSE #10 .56 - 1.06

HOSE 5/8 ID LPG & NG (20" LG)

BARBED STR 3/8 NPT X 5/8

DECAL INLET PRESSURE

DECAL FUEL INLET NG

INTAKE ADAPTER 3.0L FORD-BOSCH

GASKET BOSCH 32

ACTUATOR BOSCH 32 GOVERNOR

HOSE 1.5 ID X 2 LG 20R4

SCREW SHC M6-1.0 X 18 G12.9

WASHER LOCK M6-1/4

SCREW HHC M6-1.0 X 50 G8.8

CLAMP HOSE #28 1.32-2.25

CLAMP HOSE #10 .56-1.06

HOSE 3/8 ID SINGLE BRAID (305mm [12"] LONG)

HOSE 3/8 ID SINGLE BRAID (432mm [17"] LONG)

VALVE PCV

GROMMET ROCKER COVER 3.0LFORD

BARBED EL 90 3/8 X 3/8 PLST

CLAMP VINYL .75 X .343 Z

SCREW HHC M6-1.0 X 16 G8.8

WASHER LOCK M6-1/4

WASHER FLAT 1/4-M6 ZINC

ASSY THROTTLE 27MM

VENTURI HOLDER W/32MM ACTUATOR

O-RING 47.625 ID X 2.38 WIDTH

VENTURI, 27 ID THROTTLE W/CHOK

O-RING 45.63 ID X 2.62 WIDTH

Generac ® Power Systems, Inc.

41

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Alternator — Drawing No. 0F5092-A

42 Generac ® Power Systems, Inc.

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Alternator — Drawing No. 0F5092-A

ITEM PART NO.

15

16

17

18

19

10

11

12

13

14

20

21

1

2

3

4

5

8

9

6

7

043123

051779

0E7587

023365

0C3993

057192

0A2602

042558

0A2601

022264

038150

077043F

077043F

0F1659A

0F1657A

0F1655A

0F5073A

0E7413A

0F1660A

0F1658A

0F1656A

0F5074A

0E7412A

0E5706

0E5048

0E5048B

0E5048A

0E6668

0E6076

046526

051755

04576100BK

04576100BF

ROTOR REPLACEMENT PARTS

30

31

047248

070892

QTY.

1

1

4

1

4

1

1

4

4

4

4

1

1

4

4

1

8

4

1

REF

REF

REF

1

1

1

1

1

1

1

1

1

1

1

1

1

DESCRIPTION

ROTOR 390 15KW 1P DIRECT HSB (2.5L FORD)

ROTOR 390 20KW 1P DIRECT HSB (2.5L FORD)

ROTOR 390 25KW 1P DIRECT HSB (2.5L FORD)

ROTOR 390__30AD1 HSB TECUM

RTR 390 40KW 1P DIRECT HSB

STR 390 15AD HSB (382MM LONG) (2.5L FORD)

STR 390 20AD HSB (382MM LONG) (2.5L FORD)

STR 390 25AD HSB (382MM LONG) (2.5L FORD)

STR-390__30AD1 HSB TECUM

STR-390--40AD HSB (433MM LONG)

REAR BEARING CARRIER 390/DRCT

FLEXPLATE 3.0L FORD

FLEXPLATE 2.5L FORD

FLEXPLATE HSB 3.9L CHRYSLER

FLYWHEEL ASSY 3.0L HSB LG GEAR

REVCOR FAN 10.75 X 2 W/PRESS DIS

WASHER LOCK M10

SCREW HHC M10-1.5 X 16 G8.8

STUD M14-2.0 X 490 G5 ZINC (3.0L FORD & 2.5L FORD)

STUD M14-2.0 X 540 G5 ZINC

WASHER LOCK M14

NUT HEX M14-2.0 G8 YEL CHR

ASSY BRUSH HOLDER 390/HSB

WASHER SHAKEPROOF INT #8

SCREW HHTT M4-0.7 X 25 BP

SCREW SHC M10-1.5 X 30 G12.9

WASHER FLAT .688 ID X 3.25 OD

KEY SQ 3/8 X 1 STEEL

SCREW HHC M16-2.0 X 45 G8.8

WASHER LOCK #8-M4

WASHER FLAT #8 ZINC

CONDUIT FLEX 1-1/4" (30" LG - 3.0L FORD & 3.9L CHRYSLER)

CONDUIT FLEX 1-1/4" (18" LG - 2.5L FORD)

BALL BEARING-45 MM

SLIP RING -MACHINED-

Generac ® Power Systems, Inc.

43

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Muffler — Drawing No. 0E6479-E

13

7

13

9

13

13

6

10

TO

COMPARTMENT

11

12

10

11

12

5

1

2

22

11

8

4

TO

MANIFOLD

17

21

2

8

8

3

8

TO

MANIFOLD

17

21

18

19

20

19

20

18

ITEM PART NO.

QTY.

DESCRIPTION

8

9

6

7

10

3

4

1

2

5

0E6134

0E6464

0E6465

0E6465A

0E5914

060366

027837

036797

039253

022145

1

2

1

1

1

1

1

4

2

2

MUFFLER, 3.0L FORD

EXHAUST ELBOW 3.0L FORD HSB

EXHAUST PIPE LH 3.0L FORD HSB

EXHAUST PIPE RH 3.0L FORD HSB

BRACKET MUFFLER 3.0L FORD

HSB

MUFFLR STRAP 6IN DIA

SCREW RHM 1/4-20 X 2-1/4

BOLT U 5/16-18 X 2.25

SCREW HHC M8-1.25 X 20 G8.8

WASHER FLAT 5/16-M8 ZINC

44 Generac ® Power Systems, Inc.

ITEM PART NO.

QTY.

DESCRIPTION

17

18

19

20

21

22

11

12

13

022129

045771

0C2454

044149

0E0170

085917

0D2611

081265

022259

2

4

2

2

4

8

10

2

4

WASHER LOCK M8-5/16

NUT HEX M8-1.25 G8 YEL CHR

SCREW TH-FRM M6-1X16 N WA

Z/JS

GASKET EXHAUST RING

EXHAUST BLANKET 750MM

WASHER LOCK 3/8 SS

SCREW HHC 3/8-16 X 1-3/4 SS

MOUNTING FLANGE

NUT HEX 5/16-18 STEEL

Section 9 - Exploded Views and Parts

Guardian Liquid-cooled 27 kW and 30 kW Generators

Air Cleaner — Drawing No. 0E8189-A

ITEM PART NO.

QTY.

DESCRIPTION

8

9

10

6

7

1

2

3

4

5

0E5193

0E8200

0E8201

036434

0E0519A

0C8127

0A5547

062974

022127

037561

1

1

1

1

1

1

1

1

1

1

PLATE AIR CLEANER ADAPTER

TUBE AIR INTAKE 3.0L FORD

BRACKET AIR INTAKE 3.0L FORD

BOLT U 5/16-18 X 2.09

ADAPTER CARBURETOR W/PVC

CONN

ELEMENT AIR CLEANER

COVER - AIR CLEANER

STUD TH 1/4-20 X 4-1/2 G2 ZNC

NUT HEX 1/4-20 STEEL

NUT WING 1/4-20 NYLK

ITEM PART NO.

QTY.

DESCRIPTION

14

15

16

17

18

11

12

13

19

20

21

049226

049815

052619

051713

051716

022131

046526

051755

022145

022129

022259

2

2

4

4

2

8

4

4

2

2

2

WASHER LOCK M5

SCREW HHC M5-0.8 X 16 G8.8

SCREW HHC M5-0.8 X 20 G8.8

WASHER FLAT M5

NUT HEX M5-0.8 G8 YEL CHR

WASHER FLAT 3/8-M10

WASHER FLAT M10

SCREW HHC M10-1.5 X 16 G8.8

WASHER FLAT 5/16-M8 ZINC

WASHER LOCK M8-5/16

NUT HEX 5/16-18 STEEL

Generac ® Power Systems, Inc.

45

Section 10 – Warranty

Guardian Liquid-cooled 27 kW and 30 kW Generators

GENERAC POWER SYSTEMS "TWO YEAR" LIMITED WARRANTY FOR GUARDIAN

®

"PREPACKAGED EMERGENCY AUTOMATIC STANDBY GENERATORS"

For a period of two years from the date of original sale, Generac Power Systems, Inc. (Generac) warrants that its Guardian generator will be free from defects in material and workmanship for the items and period set forth below. Generac will, at its option, repair or replace any part which, upon examination, inspection and testing by Generac or a Guardian Authorized Warranty Service Dealer, is found to be defective. Any equipment that the purchaser/owner claims to be defective must be examined by the nearest Guardian Authorized

Warranty Service Dealer. All transportation costs under the warranty, including return to the factory, are to be borne and prepaid by the purchaser/owner. This warranty applies only to Generac Guardian prepackaged emergency automatic standby generators sold and rated for use in "Standby" applications.

WARRANTY SCHEDULE

YEARS ONE and TWO - 100% (one hundred percent) transferable coverage on Labor and Part(s) listed (proof of purchase and maintenance is required):

Engine - All Components

Alternator - All Components

Transfer System - All Components

Steel enclosures are warranted against rusting for the first year of ownership only. Damage caused after receipt of generator is the responsibility of the owner and is not covered by this warranty. Nicks, scrapes, dents or scratches to the painted enclosure should be repaired promptly by the owner.

All warranty expense allowances are subject to the conditions defined in Guardian's Warranty Policies, Procedures and Flat Rate

Manual.

THIS WARRANTY SHALL NOT APPLY TO THE FOLLOWING:

• Guardian generators that utilize non-Guardian/Generac replacement parts.

• Guardian generators utilizing non-Guardian/Generac automatic transfer switches.

• Repairs or diagnostics performed by individuals other than Guardian/Generac authorized dealers not authorized in writing by

Generac Power Systems.

• Any Guardian generators used as rental or trailer mounted applications.

• Units used for prime power in place of existing utility power where utility power is present or in place of utility power where utility power service does not normally exist.

• Costs of normal maintenance, adjustments, installation and start-up.

• Steel enclosures that are rusting due to the improper installation, location in a harsh or saltwater environment or scratched where integrity of paint applied is compromised.

• Failures caused by any contaminated fuels, oils, coolants or lack of proper fluid amounts.

• Failures due, but not limited, to normal wear and tear, accident, misuse, abuse, negligence or improper installation. As with all mechanical devices, the Generac engines need periodic part(s) service and replacement to perform well. This warranty will not cover repair when normal use has exhausted the life of a part(s) or engine.

• Failures caused by any external cause or act of God, such as collision, theft, vandalism, riot or wars, nuclear holocaust, fire, freezing, lightning, earthquake, windstorm, hail, volcanic eruption, water or flood, tornado or hurricane.

• Damage related to rodent and/or insect infestation.

• Products that are modified or altered in a manner not authorized by Generac in writing.

• Any incidental, consequential or indirect damages caused by defects in materials or workmanship, or any delay in repair or replacement of the defective part(s).

• Failure due to misapplication.

• Telephone, cellular phone, facsimile, internet access or other communication expenses.

• Living or travel expenses of person(s) performing service, except as specifically included within the terms of a specific unit warranty period.

• Expenses related to "customer instruction" or troubleshooting where no manufacturing defect is found.

• Rental equipment used while warranty repairs are being performed.

• Costs incurred for equipment used for removal and/or reinstallation of generator, (i.e.; cranes, hoists, lifts, etc.)

• Overnight freight costs for replacement part(s).

• Overtime labor.

• Starting batteries, fuses, light bulbs and engine fluids.

THIS WARRANTY IS IN PLACE OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED. SPECIFICALLY, GENERAC MAKES

NO OTHER WARRANTIES AS TO THE MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

GENERAC'S ONLY LIABILITY SHALL BE THE REPAIR OR REPLACEMENT OF PART(S) AS STATED ABOVE. IN NO EVENT

SHALL GENERAC BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF SUCH DAMAGES ARE A

DIRECT RESULT OF GENERAC'S NEGLIGENCE. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply to you.

This warranty gives you specific legal rights. You also have other rights from state to state.

GENERAC ® POWER SYSTEMS, INC.

P.O. BOX 297

WHITEWATER, WI 53190

Part No. 0F5095 Revision B (05/05/05)

Revision (02/01/05)

Printed in U.S.A.

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