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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.
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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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Table of contents
- 4 SAFETY RULES
- 6 Section 1 — GENERAL INFORMATION
- 6 Generator
- 6 Transfer Switch
- 6 Automatic System Operation
- 6 Generator AC Connection Systems
- 6 Main Circuit Breaker
- 7 Generator Fuel System
- 7 Engine Protective Devices
- 8 Unpacking
- 8 Lifting the Generator
- 9 1.10 Specifications
- 9 1.11 Fuel Consumption
- 9 1.12 Reconfiguring the Fuel System
- 10 1.13 Torque Specifications
- 10 1.14 Engine Oil Recommendations
- 10 1.15 Coolant Recommendations
- 10 1.16 Before Installation
- 10 Section 2 — INSTALLATION
- 10 Standby Generator Installation
- 11 Generator Location
- 11 Generator Mounting and Support
- 11 Basic Standby Electric System
- 12 Emergency Circuit Isolation Method
- 12 Total Circuit Isolation Method
- 12 Grounding the Generator
- 12 Generator AC Neutral Connections
- 12 Transfer Switch Start Signal Connections
- 13 2.10 Battery Installation
- 13 2.11 Preparation Before Start-Up
- 14 Section 3 — OPERATION
- 14 Using a Standard “GTS” Transfer Switch
- 15 Control Console Components
- 16 Manual Transfer and Startup
- 16 Engine Governor Adjustments
- 16 Retransfer and Shutdown
- 16 Automatic Operation
- 16 Weekly Exercise Cycle
- 17 Section 4 — MAINTENANCE
- 17 Service Facilities
- 17 Cooling System
- 17 Electrical System
- 18 Checking Fluid Levels
- 18 Can Perform
- 20 Miscellaneous Maintenance
- 22 Scheduled Maintenance
- 25 Section 5 — TROUBLESHOOTING
- 26 Section 6 — NOTES
- 27 Section 7 — INTALLATION DIAGRAM
- 28 Section 8 — ELECTRICAL DATA
- 32 PARTS LISTS