ortable Generator 004090 2 004091 2 004092 2 004093 2 004094 2 004095 2 004096 2 004097 2 004474 0 004124 1 004125 1 004126 1 004127 1 004128 1 004130 1 004131 1 004475 0 User Manual
®
P O W E R S YS TE M S , IN C .  
Owner’s Manual  
Liquid-cooled, Prepackaged  
Standby Generators  
Model Numbers  
(Natural Gas)  
004090-2  
004092-2  
004094-2  
004096-2  
004091-2  
004093-2  
004095-2  
004097-2  
004474-0 (w/TS)  
(Liquid Propane Vapor)  
004124-1  
004126-1  
004128-1  
004131-1  
004125-1  
004127-1  
004130-1  
004475-0 (w/TS)  
ONLY QUALIFIED ELECTRICIANS OR CONTRACTORS  
SHOULD ATTEMPT INSTALLATION!!  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table of Contents  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Retransfer and Shutdown..........................................................14  
INTRODUCTION............................................................  
Automatic Operation..................................................................14  
Weekly Exercise Cycle..............................................................14  
Engine Heater ..........................................................................14  
Section 3  
SAFETY RULES ........................................................................2  
Section 1  
GENERAL INFORMATION ........................................................4  
Generator ....................................................................................4  
Automatic System Operation ......................................................4  
Generator AC Connection Systems ............................................4  
Main Circuit Breaker....................................................................5  
Generator Fuel System ..............................................................5  
Engine Protective Devices ..........................................................5  
Unpacking....................................................................................6  
Generator Specifications ............................................................6  
Lifting the Generator ..................................................................7  
Engine Specifications..................................................................7  
Fuel Consumption ......................................................................7  
Lifting the Generator ..................................................................7  
Engine Oil Recommendations ....................................................7  
Before Installation........................................................................8  
Section 2  
MAINTENANCE........................................................................15  
Maintenance Performed by  
Authorized Service Facilities ....................................................15  
Overload Protection for Engine DC Electrical System..............15  
Checking Fluid Levels ..............................................................15  
Maintenance Owner/Operator Can Perform..............................16  
Miscellaneous Maintenance......................................................17  
TROUBLESHOOTING..............................................................18  
Section 4  
NOTES ......................................................................................19  
Section 5  
WIRING DIAGRAMS AND SCHEMATICS..........................20-25  
Section 6  
EXPLODED VIEWS AND PARTS LISTS............................26-43  
STANDBY GENERATOR INSTALLATION ................................9  
Basic Standby Electric System..............................................................9  
Emergency Circuit Isolation Method....................................................10  
Total Circuit Isolation Method ..............................................................10  
Grounding the Generator ....................................................................10  
Generator AC Neutral Connections ....................................................10  
Transfer Switch Start Signal Connections ..........................................10  
Battery Installation ..............................................................................10  
Preparation Before Start-Up................................................................11  
Section 3  
Section 7  
INSTALLATION DRAWINGS ..............................................44-45  
Section 8  
WARRANTY.......................................................46 - Back Cover  
Figure 1- Water Cooled Emergency Pow er System  
OPERATION ............................................................................12  
Using a Standard “GTS” Transfer Switch ..................................12  
Control Console Components ..................................................13  
Manual Transfer and Startup ....................................................13  
®
G e n e r a c P o w e r S y s t e m s , In c .  
1
Download from Www.Somanuals.com. All Manuals Search And Download.  
Important Safety Instructions  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
S AVE THES E INS TRUCTIONS – The m a n u fa ctu r er s u gges ts tha t thes e r u les for s a fe  
oper a tion be copied a n d pos ted in poten tia l ha za r d a r ea s . S a fety s hou ld be s tr es s ed to a ll  
oper a tor s , poten tia l oper a tor s , a n d s er vice a n d r epa ir techn icia n s for this equ ipm en t.  
S AVE THES E INS TRUCTIONS – This m a n u a l con ta in s im por ta n t in s tr u ction s tha t s hou ld be  
follow ed du r in g in s ta lla tion a n d m a in ten a n ce of the gen er a tor a n d ba tter ies .  
GENERAL HAZARDS  
WARNING:  
The engine exhaust from this product  
• For  
safety  
r easons,  
Gener ac  
r ecom m end s  
contains chemicals known to the state  
of California to cause cancer, birth  
defects or other reproductive harm.  
that this equipm ent be installed, serviced and  
repaired by a Generac Authorized Service Dealer or  
other com petent, qualified electrician or installation  
technician who is fam iliar with applicable codes,  
standards and regulations. The operator also m ust  
com ply with all such codes, standards and regula-  
tions.  
WARNING:  
This product contains or emits chemicals  
known to the state of California to cause  
cancer, birth defects or other reproductive harm.  
• Installation, operation, servicing and repair of this  
(and related) equipm ent m ust always com ply with  
applicable codes, standards, laws and regulations.  
Adhere strictly to local, state and national electrical  
and building codes. Com ply with regulations the  
Occupational Safety and Health Ad m inistr ation  
(OSHA) has established. Also, ensure that the gener-  
ator is installed, operated and serviced in accordance  
with the m anufacturer’s instructions and recom m en-  
dations. Following installation, you m ust not do any-  
thing that m ight render the unit unsafe or in non-  
com pliance with the aforem entioned codes, stan-  
dards, laws and regulations.  
• The engine exhaust fum es contain carbon m onoxide  
gas, which can be DEADLY. This dangerous gas, if  
breathed in sufficient concentrations, can cause  
unconsciousness or even death. For that reason, ade-  
quate ventilation m ust be provided. Exhaust gases  
m ust be piped safely away from any building or  
enclosure that houses the generator to an area where  
people, anim als, etc., will not be harm ed. This  
exhaust system m ust be installed properly, in strict  
com pliance with applicable codes and standards.  
• Keep hands, feet, clothing, etc., away from drive belts,  
fans, and other m oving or hot parts. Never rem ove  
any drive belt or fan guard while the unit is operating.  
• Adequate, unobstructed flow of cooling and ventilat-  
ing air is critical in any room or building housing the  
generator to prevent buildup of explosive gases and  
to ensure correct generator operation. Do not alter  
the installation or perm it even partial blockage of  
ventilation provisions, as this can seriously affect safe  
operation of the generator.  
Study these SAFETY RULES carefully before installing,  
operating or servicing this equipment. Become familiar  
with this Owner’s Ma nua l and with the unit. The genera-  
tor can operate safely, efficiently and reliably only if it is  
properly installed, operated and maintained. Many acci-  
dents are caused by failing to follow simple and funda-  
mental rules or precautions.  
Generac cannot possibly anticipate every possible cir-  
cum stance that m ight involve a hazard. The warnings in  
this  
m anual,  
and  
on  
tags  
and  
d ecals  
affixed to the unit are, therefore, not all-inclusive. If you  
use a procedure, work m ethod or operating technique  
that Generac does not specifically recom m end, you  
m ust satisfy yourself that it is safe for you and others.  
You also m ust m ake sure the procedure, work m ethod  
or operating technique that you choose does not render  
the generator unsafe.  
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 w ork on the  
generator.  
Parts of the generator are rotating and/or hot  
during operation. Exercise care near running gen-  
erators.  
• Keep the area around the generator clean and unclut-  
tered. Rem ove any m aterials that could becom e haz-  
ardous.  
• When working on this equipm ent, rem ain alert at all  
tim es. Never work on the equipm ent when you are  
physically or m entally fatigued.  
®
2
G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Important Safety Instructions  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
• Inspect the generator regularly, and prom ptly repair • Generators installed with an autom atic transfer  
or replace all worn, dam aged or defective parts using  
only factory-approved parts.  
• Before perform ing any m aintenance on the generator,  
disconnect its battery cables to prevent accidental  
start-up. Disconnect the cable from the battery post  
ind icated by a NEGATIVE, NEG or (–) fir st.  
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  
m ay result in dangerous operating conditions from  
leaking exhaust gases, fuel leakage, oil leakage, etc.  
switch will crank and start autom atically when nor-  
m al (utility) source voltage is rem oved or is below an  
acceptable preset level. To prevent such autom atic  
start-up and possible injury to personnel, disable the  
generator’s autom atic 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, im m edi-  
ately shut down the source of electrical power. If this  
is not possible, attem pt to free the victim from the  
live conductor. AVOID DIRECT CONTACT WITH  
THE VICTIM. Use a nonconducting im plem ent, 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 im m ediate m edical help.  
• Never wear jewelry when working on this equipm ent.  
J ewelry can conduct electricity resulting in electric  
shock, or m ay get caught in m oving com ponents  
causing injury.  
ELECTRICAL HAZARDS  
• All generators covered by this m anual produce dan-  
gerous electrical voltages and can cause fatal electrical  
shock. Utility power delivers extrem ely high and dan-  
gerous voltages to the transfer switch as well as the  
standby generator. Avoid contact with bare wires, ter-  
m inals, connections, etc., on the generator as well as  
the transfer switch, if applicable. Ensure all appropri-  
ate covers, guards and barriers are in place before  
operating the generator. If you m ust work 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 m ust stand on m etal or concrete while  
installing, operating, servicing, adjusting or repairing  
this equipm ent, place insulative m ats over a dry  
wooden platform . Work on the equipm ent only while  
standing on such insulative m ats.  
FIRE HAZARDS  
• Keep a fire extinguisher near the generator at all  
tim es. Do NOT use any carbon tetra-chloride type  
extinguisher. Its fum es are toxic, and the liquid can  
deteriorate wiring insulation. Keep the extinguisher  
properly charged and be fam iliar with its use. If you  
have any question pertaining to fire extinguishers,  
consult your local fire departm ent.  
EXPLOSION HAZARDS  
• The National Electrical Code (NEC), Article 250  
requires the fram e and external electrically conduc-  
tive 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 m ight be caused by a ground fault condi-  
tion in the generator set or by static electricity. Never  
disconnect the ground wire.  
• Wire gauge sizes of electrical wiring, cables and cord  
sets m ust be adequate to handle the m axim um elec-  
trical current (am pacity) to which they will be sub-  
jected.  
• Before installing or servicing this (and related) equip-  
m ent, m ake 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 norm ally  
supplied by an electric utility shall be by m eans 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 m eans will result in dam age to the generator  
and m ay also result in injury or death to utility power  
workers due to backfeed of electrical energy.  
• Properly ventilate any room or building housing the  
generator to prevent build-up of explosive gas.  
• Do not sm oke around the generator. Wipe up any fuel  
or oil spills im m ediately. Ensure that no com bustible  
m aterials are left in the generator com partm ent, or  
on or near the generator, as FIRE or EXPLOSION  
m ay result. Keep the area surrounding the generator  
clean and free from debris.  
• Generac generator sets m ay operate using one of sev-  
eral types of fuels. All fuel types are potentially FLAM-  
MABLE and/or EXPLOSIVE and should be handled  
with care. Com ply with all laws regulating the storage  
and handling of fuels. Inspect the unit’s fuel system  
frequently and correct any leaks im m ediately. Fuel  
supply lines m ust be properly installed, purged and  
leak tested according to applicable fuel-gas codes  
before placing this equipm ent into service.  
• Diesel fuels are highly FLAMMABLE. Gaseous fluids  
such as natural gas and liquid propane (LP) gas are  
extrem ely EXPLOSIVE. Natural gas is lighter than air,  
and LP gas is heavier than air; install leak detectors  
accordingly.  
®
G e n e r a c P o w e r S y s t e m s , In c .  
3
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 1 - General Information  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
GENERATOR  
AUTOMATIC SYSTEM OPERATION  
This equipm ent is an water-cooled, engine-driven gen- When this generator along with its transfer switch has  
erator set. The generator is designed to supply electrical been installed and interconnected, a circuit board in the  
power that operates critical electrical loads during util- generator panel constantly m onitors utility power  
ity power failure. The unit has been factory-installed in source voltage. Should that voltage drop below a preset  
a weather resistant, all m etal sound attenuated enclo- value, and rem ain at such a low state for a preset  
sure and is intended for outdoor installation only. Use am ount of tim e, the generator cranks and starts. After  
this generator as a source of electrical power for the the generator starts, the transfer switch transfers load  
operation of 120 and/or 240 volts, single or 3-phase circuits so the generator can power them .  
loads, or 120 and/or 208 volts, 3-phase loads.  
When utility source voltage has been restored, the  
switch re-transfers back to the utility source voltage and  
the generator then shuts down.  
These m odels are available. They are rated as follows:  
Model 004090: Provides 10,000 watts (10 kW) of 1-phase power.  
GENERATOR AC  
Model 004091: Provides 10,000 watts (10 kW) of 3-phase power.  
CONNECTION SYSTEMS  
The generator was shipped from the factory with its sta-  
Model 004124: Provides 10,000 watts (10 kW) of 1-phase power.  
tor AC output leads connected in one of the “Delta” con-  
Model 004125: Provides 10,000 watts (10 kW) of 3-phase power.  
Model 004092: Provides 15,000 watts (15 kW) of 1 phase power.  
Model 004093: Provides 15,000 watts (15 kW) of 3 phase power.  
Model 004126: Provides 15,000 watts (15 kW) of 1 phase power.  
Model 004127: Provides 15,000 watts (15 kW) of 3 phase power.  
Model 004094: Provides 20,000 watts (20 kW) of 1-phase power.  
Model 004095: Provides 20,000 watts (20 kW) of 3-phase power.  
Model 004128: Provides 20,000 watts (20 kW) of 1-phase power.  
Model 004096: Provides 25,000 watts (25 kW) of 1 phase power.  
Model 004097: Provides 25,000 watts (25 kW) of 3 phase power.  
Model 004130: Provides 25,000 watts (25 kW) of 1 phase power.  
Model 004131: Provides 25,000 watts (25 kW) of 3 phase power.  
Model 004474: Provides 25,000 watts (25 kW) of 1 phase power.  
Model 004475: Provides 25,000 watts (25 kW) of 1 phase power.  
figurations, as shown in Figure 2. This type of connec-  
tion system will supply a 120 and/or 240 volts, 1 or  
3-phase output as shown in the illustration.  
Figure 2 - Generator AC Connection System  
WARNING: If this generator is used to pow er  
electrical load circuits normally pow ered by a  
utility pow er source, you are required by code to  
install a transfer sw itch. The transfer sw itch must  
effectively isolate the electric system from the  
utility distribution system w hen the generator is  
operating (NEC 701). Failure to isolate an electri-  
cal system by such means results in damage to  
the generator and may also result in injury or  
even death to utility pow er w orkers due to back-  
feed of electrical energy.  
If, however, load voltage requires 120/208 volts, 3-phase  
output, generator will require reconnecting of the sta-  
tor’s output leads. This task should only be perform ed  
by a qualified Generac service technician. Refer to the  
installation m anual (Part No. 079699) for details.  
®
4
G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 1 - General Information  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Figure 3 represents a single-phase, 3-wire generator AC  
ENGINE PROTECTIVE DEVICES  
connection system . The stator assem bly in this system  
consists of a pair of stationary windings, with two leads  
brought out of each winding. Each single winding can  
supply 120 volts AC, 60 Hertz. When the two windings  
are connected in series, a 240 volts, 60 Hertz AC output  
results. Typically the two “hot” leads in the circuit are  
Wires No. 11 and 44. The “Neutral” leads are the junc-  
tion of Wires 22 and 33.  
The engine has several safety switches which cause the  
engine to autom atically shut down under the following  
conditions: low oil pressure, high coolant tem perature,  
engine overspeed, low coolant level or overcrank.  
LOW OIL PRESSURE SWITCH:  
This switch is norm ally-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 and the engine shuts  
down autom atically (Figure 4).  
Figure 3 - Generator AC Connection System  
Figure 4 - Low Oil Pressure Sw itch  
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 as  
follows:  
HIGH COOLANT TEMPERATURE SWITCH:  
MODEL  
CIRCUIT BREAKER RATING  
Norm ally open (N.O.) therm ostatic switch has sensing  
tip which is im m ersed in captive coolant. Should  
coolant tem perature exceed about 230°F (110°C), the  
switch contacts close, which causes the engine to shut  
down autom atically (Figure 5).  
004090-2, 004124-1  
004091-2, 004125-1  
004092-2, 004128-1  
004093-2  
004094-2, 004126-1  
004095-2, 004127-1  
004096-2, 004130-1  
004097-2, 004131-1  
004474-0, 004475-0  
50 amp BQ2 breaker  
40 amp BQ3 breaker  
90 amp BQ2 breaker  
70 amp BQ3 breaker  
70 amp BQ2 breaker  
60 amp BQ3 breaker  
125 amp BQ2 breaker  
90 amp BQ3 breaker  
125 amp BQ2 breaker  
Figure 5 - High Coolant Temperature Sw itch  
GENERATOR FUEL SYSTEM  
Your unit has been factory tested and adjusted using a  
natural gas fuel system . If propane (LP) gas is pre-  
ferred, contact an authorized service dealer.  
WARNING: 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.  
®
G e n e r a c P o w e r S y s t e m s , In c .  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 1 — General Information  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Figure 7 - Control Module Assembly Circuit Board  
LOW COOLANT LEVEL SWITCH:  
Should engine coolant level drop below the level of the  
high coolant tem perature switch, it is possible for the  
engine to overheat without autom atic shutdown. To  
prevent such overheating without autom atic shut down,  
the engine has a low coolant level sensor. If the engine  
coolant drops too low, the engine autom atically shuts  
down (Figure 6).  
Figure 6 - Low Coolant Level Sensor  
OVERCRANK SHUTDOWN:  
After 90 seconds of crank-rest cycles, this function ends  
cranking if the engine fails to start in that 90-second  
span.  
DC FUSE  
This clearly labeled fuse is located on the front panel of  
the control system . It protects the panel wiring and  
com ponents from dam aging overload. Always rem ove  
this fuse before com m encing work on the generator.  
The unit will not start or crank if the fuse is blown.  
Replace the fuse with one of the sam e size, type, and rat-  
ing. Generac norm ally uses an AGC fuse rated at 15  
am ps.  
OVERSPEED SHUTDOWN:  
The CMA circuit board on liquid cooled units receives  
AC frequency (rpm ) signals directly from the stator AC  
power windings, via sensing leads S15 and S16. Should  
AC frequency exceed about 72 Hz, circuit board action  
will autom atically shutdown the engine (Figure 7).  
*Rated power of gen erator is subject to an d lim ited by  
such factors as am bien t tem perature, altitude, en gin e  
con dition , an d oth er factors. En gin e power will decrease  
about 3 .5 % for each 1 0 0 0 feet above sea level an d will  
decrease an addition al 1% for each 10°F above 60°F.  
Maxim um output power of th e gen erator is lim ited by  
UNPACKING  
UNPACKING PRECAUTIONS:  
Handle shipping cartons and crates with care. Use care  
to avoid dam age from dropping, bum ping, collision, etc.  
Store and unpack cartons with the proper side up, as  
noted on the shipping carton.  
m axim um engine power.  
† Models 0 0 4 4 7 4 & 0 0 4 4 7 5 h as sam e specificat ion s  
as m odels 0 0 4 0 9 6 & 0 0 4 1 3 0 below.  
SPECIFICATIONS  
GENERATOR SPECIFICATIONS  
3-Phase  
1-Phase  
Model  
004097  
004131  
004095  
004127  
004093  
004091  
004125  
004096† 004094 004092 004090  
004130† 004126 004128 004124  
*Rated Max. Cont.  
AC Power Output (kW)  
Rated Voltage (volts)  
Rated Max. Cont.  
Current @ 240 V, 1Ø  
Current @ 208 V, 3Ø  
No. of Rotor Poles  
Driven Speed of Rotor  
Rotor Excitation System  
Type of Stator  
25  
20  
15  
10  
25  
20  
15  
120/240  
10  
120/208  
N/A  
86.8  
N/A  
69.5  
N/A  
52.1  
N/A  
34.7  
104.2  
N/A  
83.3  
N/A  
62.5  
N/A  
41.6  
N/A  
2
4
2
4
3600  
3600  
1800  
1800  
3600  
3600  
1800  
1800  
Direct excited brush type system  
12 wire reconnectable  
Class F  
Rotor/Stator Insulation  
®
6
G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 1 — General Information  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
INSPECTION:  
FUEL CONSUMPTION  
Models 004096, 004097, 004130, 004131, 004474, 004475  
Using Natural Gas ....................................441 cu. ft. per hour  
Using LP Gas ........................175 cubic ft.(4.8 gal.) per hour  
Models 004094, 004095, 004126, 004127  
After unpacking, carefully inspect the generator for any  
dam age that m ay have occurred during shipm ent. If  
loss or dam age is noted at the tim e of delivery, have the  
person(s) m aking delivery note all dam age on the freight  
bill or affix his signature under the consignor’s m em o of  
loss or dam age.  
Using Natural Gas ....................................359 cu. ft. per hour  
Using LP Gas ........................143 cubic ft. (4.0 gal.) per hour  
Model 004092, 004093, 004128  
LIFTING THE GENERATOR  
WARNING: When lifting or hoisting equipment is used,  
be careful not to touch overhead power lines. The gener-  
ators weight of more than 900 pounds requires proper  
tools, equipment, and qualified personnel to be used in  
all phases of handling and unpacking.  
Using Natural Gas ....................................277 cu. ft. per hour  
Using LP Gas ........................110 cubic ft.(3.1 gal.) per hour  
Models 004090, 004091, 004124, 004125  
Using Natural Gas ....................................195 cu. ft. per hour  
Using LP Gas ..........................77 cubic ft. (2.2 gal.) per hour  
SPECIFICATIONS  
NOTE:  
Fu el con su m pt ion is given at rat ed m axim u m con -  
t in u ou s power ou t pu t wh en u sin g n at u ral gas rat ed  
at 1 0 0 0 Bt u per cu bic foot ; or LP gas rat ed 2 5 2 0  
Bt u p er cu bic foot . Act u al fu el con su m p t ion  
obt ain ed m ay vary depen din g on su ch variables as  
applied load, am bien t t em perat u re, en gin e con di-  
t ion s an d ot h er en viron m en t al fact ors.  
ENGINE SPECIFICATIONS  
Make................................................................................Mitsubishi  
Displacement ................................................92 inches3 (1.5 liters)  
Cylinder Arrangement........................................................4, in-line  
Valve Arrangement..................................................Overhead Cam  
Firing Order..........................................................................1-3-4-2  
Number of Main Bearings ............................................................5  
Compression Ratio ................................................................9 to 1  
No. of Teeth on Flywheel ..........................................................104  
Ignition Timing  
TORQUE SPECIFICATIONS  
Cylinder Head ......................................15 (+ 90° + 90°) ft.lb.  
Intake Manifold ..........................................................13 ft.lb.  
Exhaust Manifold ......................................................13 ft.lb.  
ENGINE OIL RECOMMENDATIONS  
The unit has been filled with 15W-40 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 am bient  
tem perature range anticipated before the next oil  
change:  
at 1800 rpm ....................................................35 degrees BTDC  
at 3600 rpm ....................................................43 degrees BTDC  
Spark Plug Gap....................................................0.020-0.025 inch  
Recommended Spark Plugs  
Champion ......................................................................RN11YC4  
Oil Pressure......................................................................30-50 psi  
Crankcase Oil Capacity..........................4.0 U.S. quarts (3.8 liters)  
Recommended Engine Oil..........................................SAE 15W-40  
Type of Cooling System....................Pressurized, closed recovery  
Cooling Fan ................................................................Pusher Type  
Cooling System Capacity ........................2 U.S. gallons (7.6 liters)  
Temperature  
Above 80° F (27° C)  
32° to 80° F (-1° to 27° C)  
Below 32° F (0° C)  
Oil Grade (Recommended)  
SAE 30W or 15W-40  
SAE 20W-20 or 15W-40  
SAE 10W or 15W-40  
CAUTION: Any attempt to crank or start the  
engine before it has been properly serviced w ith  
the recommended oil may result in an engine  
failure.  
Recommended Coolant..............................Use a 50-50 mixture of  
ethylene glycol base.  
®
G e n e r a c P o w e r S y s t e m s , In c .  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 1 — General Information  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
BEFORE INSTALLATION  
Before installing this equipm ent, check the ratings of  
both the generator and the transfer switch. Read  
“Em er gency Isolation Method ” and “Total Cir cuit  
Isolation Method” in the installation m anual (Part No.  
079699).  
The generator’s rated wattage/am perage capacity m ust  
be adequate to handle all electrical loads that the unit  
will power. You m ay have to group the critical (essential)  
loads together and wire them into a separate “em er-  
gency” distribution panel.  
This generator can be installed in conjunction with a  
stand ar d Gener ac “GTS” type tr ansfer switch, if  
desired.  
The standard transfer switch has no sensing or con-  
trolling circuit boards. Instead, the generator control  
console houses a “Control Module Assem bly”, which  
controls all phases of operation, including engine start  
up and load transfer.  
®
8
G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 2 — Installation  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
STANDBY GENERATOR INSTALLATION  
Connecting this generator to an electrical system normally supplied by an electric utility shall be by  
means of a transfer sw itch (such as the Generac “GTS” type transfer switch), so as to isolate the electric  
system from the utility distribution system w hen the generator is operating. Failure to isolate the  
electric system by these means w ill result in damage to the generator and may also result in injury  
or death to utility w orkers due to backfeed of electrical energy.  
• Article X, NATIONAL BUILDING CODE, available  
from the Am erican Insurance Association, 85 J ohn  
Street, New York, N.Y. 10038.  
• AGRICULTURAL WIRING HANDBOOK, obtainable  
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  
from the Food and Energy Council, 909 University  
Avenue, Colum bia, MO, 65201.  
• ASAE EP-364.2, INSTALLATION AND MAINTE-  
NANCE OF FARM STANDBY ELECTRIC POWER,  
available from the Am erican Society of Agricultural  
Engineers, 2950 Niles Road, St. J oseph, MI 49085.  
• A52.1, AMERICAN NATIONAL STANDARD FOR  
CHIMNEYS, FIREPLACES AND VENTING SYS-  
TEMS, available fr om the Am er ican National  
Standard Institute, 1430 Broadway, New York, N.Y.  
10018.  
the generator set.  
Only qualified, com petent installation contractors or  
electricians thoroughly fam iliar with applicable codes,  
standards and regulations should install this standby  
electric power system . The installation m ust com ply  
strictly with all codes, standards and regulations per-  
taining to the installation.  
BASIC STANDBY ELECTRIC SYSTEM  
Figure 2.1 shows a schem atic diagram of a basic stand-  
by 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:  
After the system has been installed, you must not do  
anything that might render the installation in noncom-  
pliance w ith such codes, standards and regulations.  
NOTE:  
For m ore inform ation about the installation of a stand-  
by system , you can order Engine-Genera tor Sta ndby  
Electr ic Pow er S ys tem s In s ta ller ’s Gu id e a n d  
Reference Ma nua l (part # 46622) from your Generac  
Authorized Service Dealer.  
• Perm its the LOAD circuits to be connected to only one  
power supply at a tim e.  
• 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 m ain line circuit breaker.  
NFPA STANDARDS  
◆
The following published standards booklets pertaining  
to standby electric system s are available form the  
National Fir e  
Pr otection  
Association  
(NFPA),  
Batterym arch Park, Quincy, MA 02269:  
NOTE:  
• NFPA No. 37, STATIONARY COMBUSTION ENGINES  
AND GAS TURBINES.  
• NFPA No. 76A, ESSENTIAL ELECTRICAL SYSTEMS  
FOR HEALTH CARE FACILITIES.  
Gen erac recom m en ds th e use of a Gen erac power  
system s “GTS” type tran sfer switch in con jun ction  
with th is gen erator.  
Figure 2.1 – Basic Standby Electric System  
• 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.  
OTHER PUBLISHED STANDARDS  
◆
In addition to NFPA standards, the following inform a-  
tion pertaining to the installation and use of standby  
electric system s is available:  
®
G e n e r a c P o w e r S y s t e m s , In c .  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 2 — Installation  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Figure 2.2 – Generator Grounding Lug (typical)  
EMERGENCY CIRCUIT  
ISOLATION METHOD  
This prevents overloading the generator by keeping elec-  
trical loads below the wattage/am perage capacity of the  
generator. If the generator is powering only critical  
loads, within the wattage/am perage capacity, during util-  
ity power outages, you m ight consider using the em er-  
gency circuit isolation m ethod.  
Critical electrical loads are grouped together and wired  
into a separate “Em ergency Distribution Panel.” Load  
cir cuits power ed by that panel ar e within the  
wattage/am perage capacity of the generator set. When  
this m ethod is used, it is difficult to overload the gener-  
ator. The transfer switch m ust m eet the following  
requirem ents:  
GENERATOR AC  
NEUTRAL CONNECTIONS  
• It m ust have an am pere rating equal to the total  
am perage rating of the em ergency distribution panel  
circuit.  
• Have it installed between the building’s main distribu-  
tion panel and the emergency distribution panel.  
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 actu-  
al result depends on the electrical characteristics of the  
particular installed generator.  
TOTAL CIRCUIT ISOLATION METHOD  
When a generator capable of powering all electrical  
loads in the circuit is to be installed, you m ay use the  
“Total Circuit Isolation Method.” It is possible for the  
generator to be overloaded when this isolation m ethod  
is em ployed. The following apply to the transfer switch  
in this type of system .  
TRANSFER SWITCH START  
SIGNAL CONNECTIONS  
If your generator is to be installed with an autom atic  
transfer switch, such as a Generac GTS-type switch, it  
will be necessar y to connect the two-wir e star t  
control system .  
• Am pere rating of the transfer switch m ust equal the  
am pere rating of the norm al incom ing utility service.  
• The transfer switch is installed between the utility  
service entrance and the building distribution panel.  
Connect the two-wire start signal from the automatic  
transfer switch to the automatic start connection, which is  
located in the right hand corner of 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  
GROUNDING THE GENERATOR  
The National Electrical Code requires the fram e and  
external electrically conductive parts of this equipm ent  
to be properly connected to an approved earth ground  
and/or grounding rods. For that purpose, a GROUND conductors for the two-wire start circuit must be in their  
LUG (Figure 2.2) is provided on the generator m ounting  
base. Consult a qualified electrician for grounding  
requirem ents in your area. Grounding procedures m ust  
m eet local regulations.  
own conduit.  
BATTERY INSTALLATION  
Standby generators installed w ith automatic trans-  
fer sw itches w ill crank and start automatically  
w hen normal (utility) source voltage is removed or  
is below an acceptable preset level. To prevent  
such automatic start-up and possible injury to per-  
sonnel, do not connect battery cables until you are  
certain that normal source voltage at the transfer  
sw itch is correct and you are ready to place the  
system into operation.  
Do not connect the ground w ire to any pipe that  
carries a flammable or explosive substance – FIRE  
or an EXPLOSION may result.  
Proper grounding helps protect personnel against electri-  
cal 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.  
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  
®
1 0 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 2 — Installation  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Servicing of batteries is to be perform ed or supervised  
an explosion. Such an explosion can shatter the bat-  
tery 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.  
by personnel knowledgeable of batteries and the  
required precautions. Keep unauthorized personnel  
away from batteries.  
For recom m ended batteries, see “Specifications.” All  
batteries m ust be at 100 percent state-of-charge before  
they are installed on the generator.  
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 w hen handling a  
battery. If you spill the fluid, flush the affected  
area immediately w ith clear w ater.  
When using m aintenance-free batteries, it is not neces-  
sary to check the specific gravity or electrolyte level.  
Have these procedures perform ed at the intervals spec-  
ified in Section 4, “Maintenance.” A negative ground sys-  
tem is used. Battery connections are shown on the  
wiring diagram s. Make sure all batteries are correctly  
connected and term inals are tight. Observe battery  
polarity when connecting batteries to the generator set.  
Do not dispose of the battery in a fire. The  
battery is capable of exploding.  
Note:  
Do not open or mutilate the battery. Released  
electrolyte can be toxic and harmful to the skin  
and eyes.  
Dam age will result if th e battery con n ection s are  
m ade in reverse.  
The battery represents a risk of high short circuit  
current. When w orking on the battery, alw ays  
remove w atches, rings or other metal objects, and  
only use tools that have insulated handles.  
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 safe-  
ty information in this manual, before attempting to  
operate this (and related) equipment.  
VENTED BATTERIES  
◆
The electrolyte is a dilute sulfuric acid that is  
harmful to the skin and eyes. It is electrically con-  
ductive and corrosive. The follow ing procedures  
are to be observed:  
PRIOR TO INITIAL START-UP  
• Wear full eye protection and protective clothing,  
• Where electrolyte contacts the skin, w ash it off  
immediately w ith w ater,  
• Where electrolyte contacts the eyes, flush thoroughly  
and immediately w ith w ater and seek medical atten-  
tion, and  
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 w ith the recommended types and quanti-  
ties of engine fluids (oil, coolant, fuel, etc.) may  
result in an engine failure.  
• Spilled electrolyte is to be w ashed dow n w ith 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 w ater. The bicarbonate  
of soda solution is to be added until the evidence of  
reaction (foaming) has ceased. The resulting liquid is  
to be flushed w ith w ater and the area dried.  
Before starting the generator for the first tim e, the  
installer m ust com plete the following procedures. For  
follow-up m aintenance inform ation and/or service inter-  
vals, please refer to Section 4, “Maintenance,” and the  
“Service Schedule” on Page 17.  
Transfer Switch  
Lead acid batteries present a risk of fire because  
they generate hydrogen gas. The follow ing proce-  
dure are to be follow ed:  
If this generator is used to supply power to any electri-  
cal system norm ally 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 system s.  
(For additional inform ation, see the applicable transfer  
switch m anual for this unit.) The transfer switch, as  
well as the generator and other standby com ponents,  
m ust be properly located and m ounted in strict com pli-  
ance with applicable codes, standards and regulations.  
• DO NOT SMOKE w hen near batteries,  
• DO NOT cause flame or spark in battery area, and  
• Discharge static electricity from body before touching  
batteries by first touching a grounded metal surface.  
®
G e n e r a c P o w e r S y s t e m s , In c . 1 1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 3 — Operation  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Fuel System  
Electrical System  
Make sure the fuel supply system to the generator (a)  
delivers the correct fuel at the correct pressure and (b)  
is pr oper ly pur ged and leak tested accor d ing  
to cod e. No fuel leak age is per m itted . See  
“Specifications” (Page 7) for m ore inform ation.  
Make sure the generator is properly connected to an  
approved earth ground.  
Make sure the generator battery is fully charged, proper-  
ly installed and interconnected, and ready for use.  
Check to ensure that there are no loose electrical con-  
nections. Restrain any loose wires to keep them clear of  
any m oving generator set com ponents.  
If the unit has been idle for a long period of tim e, or if  
the fuel lines or system com ponents have been rem oved  
and reinstalled, the fuel system m ay require bleeding to  
rem ove air from the system . Air in the fuel system  
causes hard starting and rough operation. All fuel  
system lines m ust be installed and m ust be tight. A  
loose line m ay show no sign of leakage, but m ay draw  
air into the system .  
USING A STANDARD “GTS” TRANSFER  
SWITCH  
When required, the pre-packaged standby generator  
can be installed with a standard Generac “GTS” type  
autom atic transfer switch.  
When you use a standard GTS type transfer switch, it  
controls autom atic operation and autom atic transfer as  
follows:  
Use a suitable container to catch the fuel that w ill  
spill during system bleeding process. Clean up all  
spilled fuel after bleeding.  
• Solid state circuits in the transfer switch m onitor util-  
ity power source voltage.  
Generator Set Lubrication  
• When utility source voltage drops below a pre-set  
level, transfer switch action closes the circuit. The  
engine then cranks and starts as controlled by the  
pre-packaged generator’s Control Module circuit  
board.  
Check the engine crankcase oil level before operating  
and add oil to the proper level – the dipstick “FULL”  
m ark. Never operate the engine with the oil level below  
the dipstick “ADD” m ark. See “Specifications” (Page 7)  
and “Engine Oil Recom m endations” (Page 8).  
• After the engine starts and when the generator AC  
output voltage and frequency have reached a pre-set  
value, transfer switch circuits signal the transfer  
switch m ain contacts to actuate to the “Standby”  
power source side. Generator AC output then powers  
load circuits.  
• When the utility power source voltage is restored  
above a pre-set level, transfer switch solid state cir-  
cuits signal the switch m ain contacts to m ove back to  
their utility power source side.  
NOTE:  
Th is en gin e is sh ipped from th e m an ufacturer with  
1 5 W-4 0 oil. Th is oil sh ould be ch an ged after 3 0  
h ours of operation .  
Check the oil level in the generator gearbox (If so  
equipped, contact sales for availability.) prior to initial  
use and at the intervals indicated by the “Service  
Schedule.” The recom m ended oil is SAE 90 gear lubri-  
cant.  
• Following re-transfer back to the utility power source  
side, transfer switch circuit board action opens the  
circuit. Engine then shuts down.  
Also, if the engine is equipped with a m echanical gover-  
nor, m ake sure the governor is properly lubricated with  
clean engine oil.  
NOTE:  
Engine Coolant  
If you r gen erat or is in st alled in con ju n ct ion wit h a  
st an dard GTS t ype t ran sfer swit ch , refer t o t h e  
applicable t ran sfer swit ch m an u al for exact oper-  
at in g param et ers an d t im in g sequ en ces.  
Have the engine cooling system properly filled with the  
recom m ended coolant m ixture. Check the system for  
leaks and other problem s. See “Specifications” (Page 7)  
and “Coolant” (Page 8).  
Belt Tension  
Check the engine fan belt tension and condition prior to  
placing the unit into service and at recom m ended  
intervals. Belt tension is correct when a force of approx-  
im ately 22 pounds (10 kg), applied m idway between  
pulleys, d eflects the belt about 3/8- to 5/8-inch  
(10 to 16 m m ).  
®
1 2 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 3 - Operation  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
HOURMETER:  
CONTROL CONSOLE COMPONENTS  
The com ponents of a water-cooled generator control  
console (Figure 8) are as follows:  
Indicates tim e the engine-generator has operated, in  
hours and tenths of hours. Use the hourm eter along  
with the periodic m aintenance schedule for your gener-  
ator set.  
Figure 8 - Water-Cooled Generator Panel  
AUTO/ OFF/ MANUAL SWITCH:  
Use this 3-position switch as follows:  
• Set the switch to “Auto” for fully autom atic operation.  
See “Autom atic Operation”.  
• Set switch to “Manual” position to crank and start the  
generator engine.  
• Set switch to “Off” position to shut down an operat-  
ing engine. With “Off” selected, operation will not be  
possible.  
DANGER! With sw itch set to "auto", engine can  
crank and start suddenly w ithout w arning. Such  
automatic start up normally occurs w hen 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  
sw itch to "off" before w orking on or around the  
unit. Then, place a "do not operate" tag on con-  
trol console.  
AC VOLTMETER:  
The voltm eter displays generator AC output voltage dur-  
ing operation. Voltage is regulated by a solid state volt-  
age regulator and is proportional to AC frequency. Refer  
to your unit’s DATA PLATE for rated AC voltage.  
FAULT INDICATOR LAMP:  
AC AMMETER:  
Lam p goes ON when one or m ore of the following  
engine faults occurs and when engine shuts down.  
Indicated current draw of connected electrical loads  
during operation. DO NOT EXCEED YOUR UNIT’S  
RATED MAXIMUM CONTINUOUS CURRENT. Refer to  
the unit DATA PLATE.  
• Low oil pressure  
•
•
Overcrank  
Overspeed  
• High coolant tem perature  
• Low coolant level  
AC FREQUENCY METER:  
30 AMP FUSE:  
Indicates generator AC output frequency in “Hertz”  
(cycles per second). Frequency is proportional to engine  
speed. Units with a 4-pole rotor supplies 60 Hertz at  
1800 rpm . Units with a 2-pole rotor supplies 60 Hz at  
3600 rpm . Frequency reading with no electrical loads  
connected (no-load condition) should be between 59-61  
Hertz.  
Fuse protects the control console’s DC control circuit  
against electrical overload. If the fuse has m elted open  
because of an overload, engine cranking and startup  
cannot occur. Should you need to replace the fuse, use  
only an identical 30-am p replacem ent fuse. (Type AGC)  
METER READING SELECTOR SWITCH:  
DC VOLTMETER:  
Switch perm its you to select either line-to-line or  
line-to-neutral voltage and am perage readings on the  
console AC voltm eter and AC am m eter.  
The generator is equipped with a belt-driven DC  
alternator, which m aintains battery state of charge when  
the engine operates. The Control Module Assem bly also  
incorporates a trickle charge circuit which m aintains  
battery state of charge during non-operating periods.  
Battery voltage should read about 12.5 to 14.5 volts DC.  
SET EXERCISE TIME SWITCH:  
Switch allows you to program the generator to start and  
exercise autom atically. “See Weekly Exercise Cycle.”  
A
low batter y voltage ind icates the batter y is  
discharging.  
MANUAL TRANSFER AND START UP  
To transfer electrical loads to the “Standby” (generator)  
power source side and start the engine m anually, refer  
to the Owner’s Manual of your particular transfer  
switch.  
®
G e n e r a c P o w e r S y s t e m s , In c . 1 3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 3 — Operation  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
every 7 days thereafter, on day and tim e of day the  
switch was actuated.  
• Place a sign on the generator control panel and the  
transfer switch, indicating the day and tim e the gen-  
erator will be exercising.  
RETRANSFER AND SHUTDOWN  
When utility power source voltage has been restored,  
electrical loads m ay 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 what-  
ever m eans provided (such as utility m ain line circuit  
breaker).  
• Set the generator’s m ain circuit breaker to its “Off” or  
“Open” position.  
• Let the generator engine run at no-load for a few m in-  
utes, to stabilize internal unit tem peratures.  
• On the generator console, set the Auto-Off-Manual  
switch to “Off”. Wait for engine to com e to a com -  
plete stop.  
NOTE:  
If bat t ery t erm in als are discon n ect ed or con t rol  
pan el fu se is rem oved, t h e exercise t im er n eeds t o  
be reset for correct au t om at ic exercise operat ion .  
Figure 9 - “Set Exercise” Sw itch  
• For transfer to utility position, refer to the Owner’s  
Manual of your particular transfer switch.  
• Turn on the utility power supply to the transfer  
switch, using whatever m eans provided (such as a  
utility m ain line circuit breaker). The utility power  
source now powers the loads.  
AUTOMATIC OPERATION  
To set the system for fully autom atic operation, proceed  
as follows:  
ENGINE HEATER  
Your Generac standby generator com es equipped with a  
block heater (Figure 10), sim ilar to the block heaters  
used in autom otive applications.  
• Check that load cir cuits ar e connected to the  
utility power supply.  
Figure 10 - Engine Block Heater  
• Set the Auto/Off/Manual switch to its “Auto” position.  
• Set the generator m ain circuit breaker to its “On” or  
“Closed” position.  
WEEKLY EXERCISE CYCLE  
The generator will start and exercise once every 7 days.  
During this weekly exercise, the unit runs for about 20  
m inutes and shuts down. Transfer of loads to genera-  
tor output does not occur during the exercise.  
To select day and tim e for exercising, proceed as fol-  
lows:  
• Set the Auto/Off/Manual switch to OFF.  
• Set generator m ain circuit breaker to OFF or OPEN.  
• Locate the rocker switch on the control panel identi-  
fied with the words “Set Exercise Tim e” (Figure 9).  
• Push “Set Exercise Tim e” switch to ON position for  
20 to 30 seconds and then release. Switch will spring  
back into its original position when released.  
• Wait 30 seconds before setting the Auto/Off/Manual  
switch to “AUTO” position.  
Refer to applicable wiring diagram(s) and electrical schematic(s) at  
back of manual for wiring connections.  
CAUTION: If you sw itch the Auto/Off/Manual  
sw itch too soon, the engine may start. If engine  
does start, it w ill shut dow n automatically in  
about tw o (2) minutes.  
• Set the generator m ain circuit breaker to its ON or  
CLOSED position.  
• Generator is now program m ed to start and exercise  
®
1 4 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 3 — Maintenance  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
MAINTENANCE PERFORMED BY  
CHECKING FLUID LEVELS  
AUTHORIZED SERVICE FACILITIES  
CHECK ENGINE OIL  
A. EVERY THREE MONTHS  
Check engine crankcase oil level (Figure 11) at least  
every 20 hours of operation, or prior to use.  
1.Check battery state of charge and condition.  
2.Inspect and test fuel system .  
3.Check transfer switch.  
• Rem ove oil dipstick and wipe dry with a clean,  
lint-free cloth.  
• Install oil dipstick, then rem ove again.  
4.Inspect exhaust system .  
• Oil should be between FULL and ADD m arks.  
• If oil level is below the dipstick ADD m ark, rem ove oil  
fill cap. Add the recom m ended oil to bring oil level  
up to the FULL m ark. DO NOT FILL ABOVE THE  
“FULL” MARK. See page 6 for recom m ended oils.  
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 tem perature).  
Figure 11 - Oil Dipstick and Oil Fill Cap  
c
C. ONCE ANNUALLY  
1.Test engine governor; adjust or repair, if needed.  
2.Clean, inspect generator.  
3.Flush cooling system .  
OIL FILL CAP  
OIL DIPSTICK  
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 m onths, whichever com es first.)  
2.Retorque cylinder head. (See Torque Specs, page 7.)  
3.Retorque intake and exhaust m anifold. (See Torque  
Specs, page 7.)  
ap  
E. EVERY 500 OPERATING HOURS  
BATTERY FLUID  
1.Service air cleaner.  
2.Check starter.  
3.Check engine DC alternator.  
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 sep-  
arators. DO NOT USE TAP WATER IN BATTERY.  
F. EVERY 800 OPERATING HOURS  
1.Retorque cylinder head. (See Torque Specs, page 7.)  
2.Retorque intake and exhaust m anifold. (See Torque  
Specs, page 7.)  
ENGINE COOLANT  
Check coolant level in coolant recovery bottle. See  
Specifications, page 7  
3.Check engine com pression.  
4.Check valve clearance.  
• Add recom m ended coolant m ixture as necessary.  
• Periodically rem ove radiator pressure cap to m ake  
sure the coolant recovery system is functioning prop-  
erly. Coolant should be at bottom of radiator filler  
neck. If coolant level is low, inspect gasket in radia-  
tor pressure cap. Replace cap, if necessary. To have  
pressure cap tested, contact an authorized Generac  
Service Facility. Inspect cooling system and coolant  
recovery system for leaks.  
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 30 am p  
fuse. These overcurrent protection devices will open if  
the circuit is overloaded.  
CAUTION! If a circuit breaker opens or a fuse  
element melts, you should find the cause of the  
overload before resetting the circuit breaker or  
replacing the fuse.  
®
G e n e r a c P o w e r S y s t e m s , In c . 1 5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 3 — Maintenance  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
DANGER: Do not attempt to adjust the gover-  
MAINTENANCE OWNER/ OPERATOR CAN  
PERFORM  
nor. 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 w hen adequate engine  
pow er 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.  
CHECK ENGINE OIL LEVEL  
Refer to “Checking Fluid Levels” on page 15.  
CHECK BATTERY  
• Check battery fluid level each week as outlined under  
“Check Fluid Levels”.  
• Check battery cables for condition, tightness, corro-  
sion or dam age.  
necessary.  
Clean, tighten or replace as  
CHANGING ENGINE OIL  
EXERCISE SYSTEM  
Refer to m aintenance perform ed by authorized service  
facilities for engine oil and filter change frequencies.  
Start the generator engine at least once every seven days  
and let it run at least 20 m inutes. See page 14, “Weekly  
Exercise Cycle”.  
Drain the oil while the engine is still warm from run-  
ning. This m eans warm up the engine, shut it down and  
drain im m ediately as follows:  
INSPECT COOLING SYSTEM  
1.Rem ove OIL DRAIN HOSE from its retaining clip.  
2.Loosen and rem ove OIL DRAIN HOSE CAP. Drain  
oil com pletely into suitable container.  
• Inspect engine cooling system at least once each  
m onth.  
• Check hoses for dam age, deterioration, leaks, etc.  
Correct any discrepancies found.  
• Check hose clam ps for tightness.  
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 12) counterclockwise and  
rem ove. Dispose of old filter.  
CHECK ENGINE COOLANT LEVEL  
See “Checking Fluid Levels” on page 15.  
Figure 12 - Oil Filter  
PERFORM VISUAL INSPECTION  
Com plete a thorough visual inspection of the entire  
engine-generator m onthly. Look for obvious dam age,  
loose, m issing or corroded nuts, bolts and other fasten-  
ers. Look for fuel, oil or coolant leaks.  
INSPECT EXHAUST SYSTEM  
Inspect the exhaust system at least once every three  
m onths. Check all exhaust system pipes, m ufflers,  
clam ps, etc. for condition, tightness, leaks, security,  
dam age.  
OIL FILTER  
CHECK FAN BELT  
• Inspect fan belts every three m onths. Replace any  
dam aged, deteriorated, worn or otherwise defective  
belt.  
• Check fan belt tension. Thum b pressure, exerted  
m idway between pulleys, should deflect about 3/8 to  
3/4 inch. Adjust belt tension as required.  
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.Rem ove OIL FILL CAP (Figure 11, page 15). Add  
recom m ended oil (see SPECIFICATIONS). DO NOT  
FILL ABOVE THE DIPSTICK “FULL” MARK.  
Crankcase oil capacity is 4.0 U.S. quarts (3.8 liters)  
INSPECT ENGINE GOVERNOR  
Visually inspect electronic governor.  
®
1 6 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 3 — Maintenance  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
• Battery electrolyte fluid is an extrem ely caustic  
CAUTION: After refilling the crankcase w ith oil,  
alw ays check oil level on dipstick. NEVER  
OPERATE ENGINE WITH OIL BELOW THE DIP-  
STICK “ADD” MARK.  
sulfuric solution that can cause severe burns. DO  
NOT perm it fluid to contact eyes, skin, clothing,  
painted surfaces, wiring insulation, etc. If you spill  
any battery fluid, flush the affected area with clear  
water im m ediately.  
7.Start engine and check for oil leaks.  
• Always wear safety glasses, rubber apron and gloves  
when handling a battery.  
COOLANT CHANGE  
Every year, have Authorized Service Facility drain, flush  
and refill the cooling system . See SPECIFICATIONS  
(page 7) for cooling system recom m endations.  
• Batteries give off explosive hydrogen gas while  
charging. The gas can form an explosive m ixture  
around the battery for several hours after charging.  
Any spark, heat or flam es can ignite the gas and  
cause an explosion which can shatter the battery,  
causing blindness or other serious injury.  
MISCELLANEOUS MAINTENANCE  
CLEANING THE GENERATOR  
BATTERY REPLACEMENT  
Keep your generator as clean and as dry as possible.  
Dirt and m oisture that accum ulates on internal genera-  
tor windings have an adverse effect on insulation resist-  
ance.  
Generac uses these different types of vented batteries on  
units ranging up to 400 kW. When replacing batteries,  
use the sam e num ber and the type of battery that  
follows:  
Periodically clean generator exterior surfaces. A soft  
brush m ay be used to loosen caked on dirt. You can use  
a vacuum system or dry, low pressure air to rem ove any  
accum ulations of dirt. The generator is housed inside  
an all-weather enclosure, clean the enclosure with a  
soft, dam p cloth or sponge and water.  
Generac P/N  
58665  
BCI Group No.  
CCA  
27F  
4DLT  
8D  
700 @ 0 deg. F  
810 @ 0 deg. F  
1155 @ 0 deg. F  
61915  
61104  
Not e:  
Once each year have the generator cleaned and inspect-  
ed by an Authorized Service Facility. That facility will Th e BCI n u m be r s h ou ld be loc a t e d d ir e c t ly  
use dry, low pressure air to clean internal windings. on t h e ba t t e ry.  
Parts inside the control console should be cleaned and “Specificat ion s.”  
inspected at this tim e as well.  
For m ore in form a t ion , se e  
Finally, have the insulation resistance of stator and  
rotor windings checked. If insulation resistances are  
excessively low, the generator m ay require drying.  
BATTERY  
All lead-acid storage batteries discharge when not in  
use. Refer to specific instructions and warnings that  
accom pany your battery. If such inform ation is not  
available, observe the following precautions when  
handling a battery:  
• DO NOT use jum per 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. Rem ove battery from generator and  
recharge in a well-ventilated area, away from fuel  
vapors, sparks, heat or flam es.  
®
G e n e r a c P o w e r S y s t e m s , In c . 1 7  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 4 — Troubleshooting  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
PERIODIC REPLACEMENT PARTS  
Part Name  
Generac’s Part Number  
Oil Filter  
# 0A45310244  
# 046627  
# 059402  
Radiator Cap  
Air Cleaner  
Spark Plug  
# 0A45310275  
TROUBLESHOOTING POINTS  
PROBLEM  
CAUSE  
CORRECTION  
Engine won’t crank.  
1. 30 amp fuse blown.  
2. Loose or corroded or defective  
1. Replace fuse.  
2. Tighten, clean or replace  
battery cables as necessary.  
3. Defective starter contactor.  
4. Defective starter motor.  
5. Dead or Defective Battery.  
3. Replace contactor.  
4. Replace starter motor.  
5. Remove, change or replace battery.  
Engine cranks but won't start  
1. Out of fuel.  
2. Fuel solenoid (FS) is defective  
1. Replenish fuel.  
2. Replace solenoid.  
3. Reconnect wire.  
3. Open Wire #14 from Engine Control  
circuit board  
4. Spark plugs defective.  
4. Clean, regap or replace plugs.  
1. Clean or replace as needed.  
Engine starts hard, runs rough.  
Engine starts then shuts down.  
1. Flame arrestor (air cleaner) plugged or  
damaged.  
2. Plugged fuel line.  
3. Defective spark plugs.  
2. Unclog fuel line.  
3. Clean, regap or replace 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.  
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.  
7. Defective Low Coolant Level Switch  
Auto/Off/Manual Switch at OFF,  
engine continues to run  
1. Defective Auto/Off/Manual switch  
1. Replace switch.  
2. Reconnect/close wire.  
2. Open/disconnected wire #15A between  
Auto/Off/Manual switch and Control  
Module circuit board.  
3. Defective Control Module circuit board  
3. Replace board.  
No AC output from generator.  
1. Check main line circuit breaker.  
2. Check circuit breaker & fuses.  
3. Transfer switch set to NORMAL position  
4. Generator internal failure.  
1. Reset to ON or CLOSED.  
2. Reset and replace, if necessary.  
3. Set to GENERATOR position.  
4. Contact an Authorized Generac  
facility.  
5. Thermal circuit breaker open.  
5. Auto-reset - Wait 5 min. and  
attempt restart.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 5 - Notes  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
®
G e n e r a c P o w e r S y s t e m s , In c . 1 9  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 6 - Electrical Data  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Wiring Diagram — Control Panel (1-Phase) —Drawing No. 0A2803C  
FUSE  
®
2 0 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 6 - Electrical Data  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Electrical Schematic — Control Panel (1-Phase) — Drawing No. 0A2802A  
®
G e n e r a c P o w e r S y s t e m s , In c . 2 1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 6 - Electrical Data  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Wiring Diagram — Control Panel (3-Phase) — Drawing No. 0A2804C  
®
2 2 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 6 - Electrical Data  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Electrical Schematic — Control Panel (3-Phase) — Drawing No. 0A2805B  
®
G e n e r a c P o w e r S y s t e m s , In c . 2 3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 6 - Electrical Data  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Wiring Diagram — Control Panel (3-Phase) — Drawing No. 0A7176A  
®
2 4 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 6 - Electrical Data  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Electrical Schematic — Control Panel (3-Phase) — Drawing No. 0A7182A  
®
G e n e r a c P o w e r S y s t e m s , In c . 2 5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Enclosure — Drawing No. 0C1404A  
®
2 6 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Enclosure — Drawing No. 0C1404A  
ITEM  
PART NO.  
QTY.  
DESCRIPTION  
ITEM  
PART NO.  
QTY.  
DESCRIPTION  
1
2
3
A2110  
A2115  
A3133A  
A3133B  
A3133C  
A3133D  
A3359  
A3360  
C1245  
C1245A  
A3449  
A4822  
A4823  
A4824  
A4825  
A4826  
C1193  
A4831  
A4832  
C1067  
C1067A  
C1068  
C8817  
C1244  
A9955  
C1053Z  
22097  
32  
32  
4
4
2
1/4"-20-1/2" FASTENER  
1/4" NYLON WASHER  
SLIP HINGE, MALE L.H.  
SLIP HINGE, FEMALE L.H.  
SLIP HINGE, MALE R.H.  
SLIP HINGE, FEMALE R.H.  
BHSCS M6 x 16 S.S.  
SHAKEPROOF, INT M6 S.S.  
PANEL, TOP SIDE L.H.  
PANEL,TOP SIDE R.H.  
DOOR, SIDE  
PANEL, FRONT  
PANEL, SIDE BOTTOM  
PANEL, REAR  
CORNER POST, REAR L.H.  
CORNER POST, REAR R.H.  
TOP, ENCLOSURE  
24  
25  
26  
27  
28  
29  
30  
31  
35  
37  
38  
39  
40  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
22129  
22127  
22145  
89961  
22473  
82570  
39253  
42568  
49813  
37337  
A6807  
57042  
67577  
12  
4
12  
24ft.  
20  
1
12  
14  
4
4
1
2
4
4
1
2
1
1
1
1
2
LOCKWASHER, 5/16"-M8  
NUT, 1/2"-20  
FLAT WASHER, 5/16"-M8  
FOAM STRIP, 3/4" x 1/4"  
FLAT WASHER, 1/4"-M6  
PLUG BUTTON 4"  
HHCS, M8-1.25 x 20  
HHCS, M6-1.0 x 20LG  
NUT, HEX M6-1.0  
HEX NUT JAM-3/8"-24  
LATCH & CAM (REWORK)  
LATCH AND CAM  
SPEED NUT 1/4"-20  
1/4"-20 x 1 HHCS  
INSULATION, PANEL TOP  
INSULATION, DOOR  
INSULATION, PANEL, FRONT R.H.  
INSULATION, PANEL, FRONT L.H.  
INSULATION, DUCT, FRONT  
INSULATION, PANEL, FRONT TOP  
INSULATION, PANEL, SIDE  
INSULATION, PANEL, REAR  
INSULATION, DUCT, L.H. SIDE  
INSULATION, DUCT, R.H. SIDE  
INSULATION, DOOR, REAR  
WASHER, SELF LOC/DOME  
RUBBER GROMMET  
2
4
5
6
24  
24  
1
1
2
1
2
1
1
1
1
1
2
1
1
1
1
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
22413  
C1053B  
C1053A  
C1053E  
C1053F  
C1063G  
C1053H  
C1053D  
C1053J  
C1053K  
C1053L  
C1053M  
78115  
DOOR, REAR  
DUCT  
RADIATOR, SUPPORT-L.H.  
RADIATOR, SUPPORT-R.H.  
SUPPORT, MUFFLER  
TOP-CONTROL PANEL-SAE  
FRONT AIR DUCT  
BASE, MOUNTING  
KIT, INSULATION 1.5L  
LOCKWASHER, 1/4"-M6  
1
1
1
1
14  
2
1
1
1
16  
30486  
®
G e n e r a c P o w e r S y s t e m s , In c . 2 7  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Control Panel — Drawing No. 0C8847B  
®
2 8 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Control Panel — Drawing No. 0C8847B  
ITEM  
PART NO. QTY.  
DESCRIPTION  
ITEM  
PART NO. QTY.  
DESCRIPTION  
1
2
3
4
5
6
7
8
9
0C5077  
075589  
0A1775  
0C5078  
0C4224A  
057073  
022985  
081988  
070043  
070055  
070042  
070081  
076037  
022152  
022158  
061945  
032300  
022668  
076020  
083048  
0A2077  
075476  
022264  
0A3968  
039782  
0C2323  
076039  
051756  
048476  
022237  
022097  
022473  
082573  
043116  
1
1
1
1
1
1
4
1
1
1
1
1
1
10  
10  
1
1
1
1
1
1
14  
14  
1
1
2
2
3
1
1
8
8
1
4
SUPPORT, CONTROL PANEL L.H.  
BRACKET, VOLTAGE REGULATOR  
CONTRLPANEL-BACK  
SUPPORT CONTROL PANEL R.H.  
SILKSCREEN, PANEL (SAE)  
BLOCK JUNCTION 3/8-16  
WASHER FLAT #6 ZINC  
DECAL EXERCISE INFO  
VOLTMETER AC 0-300  
AMMETER AC 0-100  
FREQUENCY METER 55-65HZ  
HOURMETER  
VOLTMETER DC 8-18V  
WASHER, LOCK #10  
NUT, HEX #10-32 STEEL  
SWITCH 6A AMP/V SELECTOR  
HOLDER, FUSE  
FUSE 30A X AGC30 HLDR22669 HKP  
SWITCH DPDT 15/10 SP ON-OFF-ON  
ASY POTTED REG WOFIN  
CIRCT BRK 125X2 120/240V  
SCREW, PPHM-M4-0.7 x 16MM  
WASHER, LOCK-M4  
CAPACITOR, FILTER ASSY.  
BRACKET CIRCT BRK MOUNTING  
SCREW TAPTITE PH 6-32X5/8 ZYC  
SCREW PPHM M5-0.8 X 40  
SCREW HHC M10-1.5 X 20 G8.8  
CIRCT BRK 4.5X1 AUT30KW CNT45K  
WASHER LOCK 3/8  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
48  
49  
50  
51  
52  
53  
54*  
55  
56  
57  
58  
59*  
60*  
61  
62  
63  
64  
65  
66  
67  
056739  
072252  
063212  
058318  
033121  
049226  
023897  
075595  
049811  
072355  
055440  
022241  
022155  
098647  
057335  
021480  
048766  
058589  
070882  
0A7215  
076040  
049813  
061979  
0A2833  
0A6821  
064009  
064009  
0A1354A  
0C2212  
0C3826  
0C4427  
0C8817  
1
2
1
2
2
4
10  
1
8
2
1
1
2
1
1
1
1
1
1
10  
2
8
1
1
1
1
1
1
6
2
8
1
RELAY SOLENOID 12VDC PNL MNT  
GROMMET 1.37 X .06 X 1.00  
GROMMET 1.75 X .12 X 1.50  
TRANSFRM 150A TO 5A 5VA  
SCREW HHM 10-32 X 1/2  
WASHER LOCK M5  
WASHER FLAT #10 ZINC  
ASSM.,CMA BOX  
WASHER FLAT M6  
HHCS M6-1X12-A/C-.HD  
SCREW HHC M5-0.8 X 25 G8.8  
NUT HEX 3/8-16 STEEL  
WASHER LOCK #6  
ASSY L.C. ELECT GOV  
BLOCK TERM 20A 20 X 6 X 1100V  
DECAL TERMINAL STRIP  
BLOCK TERM 20A 2 X 6 X 1100V  
DECAL WARN ENG START  
ASSY SUPPRESSION  
SCREW SW 1/4-20X5/8 N WA JS500  
SCREW PPHM M5-0.8 X 16  
NUT HEX M6-1.0 G8 YEL CHR  
BUS BAR  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
HARNESS PNL "PP" 1P  
HARNESS WIRING (1.5L)  
LIGHT 12VDC .02A LED RED PILOT  
DECAL, TRANS. SWITCH CONN.  
REGULATOR - DC ALT  
SCREW TAPTITE PH M4-0.7X16 ZYC  
HINGE, CONTROL PANEL  
M6X1.0X12 T.H.M.S SS  
WASHER LOCK M6-1/4  
WASHER FLAT 1/4 ZINC  
SWITCH DPST 5 125V SPD RCKR  
SCREW HHC M6-1.0 X 12 G8.8  
TOP, CONTROL PANEL (SAE)  
*NOT SHOWN ON THIS ASSEMBLY  
®
G e n e r a c P o w e r S y s t e m s , In c . 2 9  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Radiator — Drawing No. 0C1406B  
®
3 0 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Radiator — Drawing No. 0C1406B  
ITEM  
PART NO.  
QTY.  
DESCRIPTION  
1
2
3
4
5
6
7
8
0A4822  
0A5734  
0A6237  
0A6238  
084918  
050967  
057823  
099502  
083709  
042568  
022097  
049813  
022473  
084427  
050967  
075443  
056892  
0A6284  
0A6258  
029032  
031669  
060035  
022127  
022145  
022129  
045771  
042907  
076749  
080712  
0A7215  
030486  
0A2111  
065852  
0C1067A  
0C1067  
0C1480  
1
1
1
1
1
12"  
4
4
2
6
15  
2
11  
1
18"  
6
4
1
1
1
4
PANEL FRONT  
RADIATOR 1.5L  
VENTURI 1.5L  
GUARD FAN  
HEATER 500W 1020  
HOSE RES 5/8 RIA 250F  
CLAMP HOSE #10 .56 - 1.06  
CLAMP HOSE #24 1.06 - 2.00  
CLAMP WIRE HOSE .573 - .551  
SCREW HHC M6-1.0 X 20 G8.8  
WASHER LOCK M6-1/4  
NUT HEX M6 -1.0 G8 YEL CHR  
WASHER FLAT M6-1/4 ZINC  
BRACKET HEATER  
HOSE RES 5/8 RIA 250F  
CRMPTIT 1/4-20 X 5/8  
CRMPTIT 10-24 X 3/8  
HOSE LOWER RADIATOR  
HOSE UPPER RADIATOR  
HOSE 9/32 ID  
BOLT CARR 1/4-20 X 1-3/4 JS500  
SPACER .41 X .75 X .87 ST/ZNC  
NUT HEX 1/4-20 STEEL  
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  
TANK COOLANT RECOVERY  
BRACKET COOLANT RECOVERY TANK  
SCREW SW 1/4-20X5/8 N WA JS500  
GROMMET 7/16 X 1/16 X 1/4  
SCREW SWAGE 10-32 X 5/16 Z/YC  
NUT SPRINGCLIP .37 - .62  
SUPPORT RADIATOR RH  
SUPPORT RADIATOR LH  
BRACKET COOLANT BOTTLE  
9
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
4
5
12  
12  
12  
12  
1
1
1
2
2
2
1
1
1
®
G e n e r a c P o w e r S y s t e m s , In c . 3 1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Radiator — Drawing No. 0C1405A  
ITEM  
PART NO. QTY.  
DESCRIPTION  
1
3
4
5
6
7
8
9
10  
12  
13  
14  
15  
0A9955  
070936  
070936C  
039253  
022145  
022129  
045771  
071956  
051730  
057821  
021991  
027482  
0A2308  
1
2
2
BASE MOUNTING  
DAMPENER VIBRATION  
DAMPENER VIBRATION  
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  
WASHER FLAT M8  
SCREW HHC M8-1.25 X 60 G8.8  
SCREW HHC M8-1.25 X 40 G8.8  
EARTH STRAP  
8
12  
12  
12  
4
2
2
1
2
1
WASHER SHAKEPROOF EXT 5/16 STL  
PLUG BUTTON 2" DIA  
®
3 2 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Muffler — Drawing No. 0C1408B  
ITEM  
PART NO.  
QTY.  
DESCRIPTION  
1
2
3
0A4355  
0C1636  
036434  
036449  
0C1330  
0C1318  
0C1068  
0C1412  
0A5728  
060366  
066889  
022145  
022129  
045771  
0A8974  
1
1
4
4
1
1
1
1
1
2
4
4
4
4
1
MANIFOLD EXHAUST 1.5L  
NIPPLE TOE 1.5 NPT X 6.5 BL IRON  
BOLT U 5/16-18 X 2.09  
SADDLE 2 INCH  
PIPE EXHAUST  
FLEX PIPE EXHAUST  
SUPPORT MUFFLER 1.5L  
ELBOW EXHAUST 45 DEG  
MUFFLER 1.6/1.5L SAE  
STRAP MUFFLER 6" DIA  
SCREW HHC M8 X 1.25 X 20MM  
WASHER FLAT 5/16 ZINC  
WASHER LOCK M8-5/16  
NUT HEX M8-1.25 G8 YEL CHR  
CAP RAIN 2"  
4
5
6
7
8
9
10  
11  
12  
13  
14  
®
G e n e r a c P o w e r S y s t e m s , In c . 3 3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Circuit Breaker — Drawing No. 0A3371B  
ITEM PART NO. QTY. DESCRIPTION  
ITEM PART NO. QTY. DESCRIPTION  
1
0A2103  
0A2104  
0A2105  
0A2106  
0A2052  
033130  
022264  
039783  
080522  
047585  
057906  
056783  
049942  
040533  
049135  
062812  
053691  
040532  
039782  
076640  
057903  
057472  
077906  
043240  
1
1
1
1
1
-
SILKSCREEN "A" PANEL  
SILKSCREEN "B" PANEL  
SILKSCREEN "C" PANEL  
SILKSCREEN "P" PANEL  
COVER BQ CIRCUIT BREAKER  
SCREW HHM #8-32 X 1/4  
WASHER LOCK M4  
BRACKET MOUNTING CIRCT BRK  
CIRCT BRK 20 X 3 INACTIVE  
CIRCT BRK 30 X 3 240V MT PL  
CIRCT BRK 35 X 3 240V  
CIRCT BRK 40X3 240V  
CIRCT BRK 50X3 W/MOUNT PL ITE  
CIRCT BRK 60X3 240V  
CIRCT BRK 70 X 3 240V  
CIR BKR 80-A 3P BQ3  
CIRCT BRK 90 X 3 ITE BQ3-B090  
CIRCT BRK 100X3 240V 39783 BR  
BRACKET MOUNTING CIRCT BRK  
CIRCT BRK 20 X 2 ITE BQ2-B020  
CIRCT BRK 25 X 2 240V ITE  
CIRCT BRK 30 X 2 240V ITE  
CIRCT BRK 35X2 W/39782 BRACKET  
CIRCT BRK 40X2 240V  
057905  
039765  
048373  
063452  
039766  
048374  
0A2077  
056967  
053640  
038150  
022471  
0A2670  
0A2820  
0A2821  
0A2822  
0A2828  
1
1
1
1
1
1
1
3
4
4
4
1
1
1
1
1
CIRCT BRK 45X2 240V  
CIRCT BRK 50X2 240V 39782 BRKT  
CIRCT BRK 70X2 240V  
CIRCT BRK 80X2 240V  
CIRCT BRK 90X2 240V  
CIRCT BRK 100X2 240V  
CIRCT BRK 125X2 120/240V  
PLUG PLASTIC .375  
SCREW RHM #8-32 X 3-1/4  
WASHER FLAT #8 ZINC  
NUT HEX #8-32 STEEL  
COVER,CIR.BRKR. 480V  
MCB 16A 3P 480V B-TR  
MCB 25A 3P 480V B-TR  
MCB 32A 3P 480V B-TR  
MCB 40A 3P 480V B-TR  
2*  
3
4
5
6
-
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
9
10  
11  
12  
13**  
14  
7
8
* USE WITH ITEM 14 ONLY  
** USE WITH ITEM 8 ONLY  
®
3 4 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – CMA Assembly — Drawing No. 081086D  
ITEM PART NO. QTY. DESCRIPTION  
ITEM PART NO. QTY. DESCRIPTION  
1
074100  
1
1
ASSY HOME STDBY LOGIC  
(MODELS 921, 863, 865)  
PP LOGIC ASM 50/60HZ  
(MODEL 9428)  
NUT SPACER .250 PCB  
SCREW PPH TAPPING #6X5/8 SS  
DECAL TERMINAL STRIP  
BLOCK TERM 20A 7 X 6 X 1100V  
SCREW PPHM M4-0.7 X 16  
TRANSFORMER ASM CMA 240/12V  
WASHER FLAT #6 ZINC  
WASHER LOCK M4  
SCREW HHC M4-0.7 X 16 G8.8  
BOX CMA  
DECAL, CMA LABEL  
DECAL, CMA LABEL  
TUBING SHRINK 19"ID RED  
14  
15  
16  
17*  
18  
19  
20  
21  
038057  
058443  
081224  
079682  
086093  
083736  
051715  
077401  
2
2
1
1
2
1
2
1
GROMMET 7/8 X 1/16 X 3/4  
SCREW CRIMPTITE 1/4-20 X 5/8  
DECAL MFG NAMEPLATE  
HARNESS CMA WIRE  
DECAL CMA WARNING  
DECAL CSA GTS  
076009A  
2
3
4
5
6
7
8
9
072566  
080882  
074978  
047822  
075476  
083264  
022985  
022264  
051787  
079847  
0A8504  
0A8504A  
022661V  
4
4
1
1
2
1
4
4
2
1
1
1
.083'  
NUT HEX M4-0.7 G8 YEL CHR  
COVER SILKSCREEN CMA  
* NOT SHOWN  
10  
11  
12  
13*  
®
G e n e r a c P o w e r S y s t e m s , In c . 3 5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Governor Assembly — Drawing No. 0A7216A  
ITEM  
PART NO.QTY.  
DESCRIPTION  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
098290  
098941A  
098958A  
098942A  
098225  
043146  
022097  
064256  
098783  
037398  
0A7041  
0A7106  
074031  
029333A  
022507  
022473  
1
1
1
1
2
3
5
2
1
2
1
1
-
ASM MOTOR STEPPER  
HOUSING GOVERNOR CONNECTOR  
CONNECTOR INTERFACE ASSEMBLY  
COVER CONNECTOR HOUSING  
SCREW FHM #2 X 5/8 SELF TAP  
SCREW HHC M6-1.0 X 10 G8.8  
WASHER LOCK M6-1/4  
SCREW HHM #6-32 X 3/8 SELF TAP  
LEVER STEPPER MOTOR  
NUT LOCK HEX #10-32 NYL INS  
ASSEMBLY CARBURATOR LINKAGE  
BRACKET STEPPER MOTOR  
LIQUID NEOPRENE  
1
2
2
TIE WRAP 7" BLACK  
SCREW HHC 1/4-20 X 1/2 G5  
WASHER FLAT 1/4 ZINC  
®
3 6 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Battery — Drawing No. 098922E  
ITEM  
PART NO.  
QTY.  
DESCRIPTION  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
077483  
038804D  
038805B  
0742600131  
022131  
046526  
052213  
059567  
078121  
022145  
022129  
022259  
050331A  
050331  
075763  
1
1
1
1
1
1
1
2
1
2
2
2
1
1
3
BATT 12VDC 75-AH 26  
CABLE BATT RED #4 X 20.00  
CABLE BATT BLK #4 X 23.00  
ASSY,WIRE#16 RED 1.6  
WASHER FLAT 3/8 ZINC  
WASHER LOCK M10  
SCREW HHC M10-1.25 X 20 G8.8  
BOLT BATTERY HOLD DOWN  
BAR BATTERY HOLDDOWN  
WASHER FLAT M8-5/16 ZINC  
WASHER LOCK 5/16  
NUT HEX 5/16-18 STEEL  
BATTERY POST COVER (RED+)  
BATTERY POSTCOVER (BLACK-)  
BOOT, BATTERY CABLE  
®
G e n e r a c P o w e r S y s t e m s , In c . 3 7  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Generator — Drawing No. 0A9348B  
®
3 8 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Generator — Drawing No. 0A9348B  
ITEM  
PART NO. QTY.  
DESCRIPTION  
ITEM  
PART NO. QTY.  
DESCRIPTION  
1
098671  
098681  
098675  
098936  
0A5336A  
0A1659  
071912  
022152  
051713  
022129  
098672  
098673  
098674  
098682  
098683  
098684  
098676  
098677  
098678  
097620  
098937  
097621  
0A5382  
075591  
052813  
0A5601  
1
1
1
1
1
1
4
4
4
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
1
ASSY ROTOR 10KW  
ASSY ROTOR 15KW  
ASSY ROTOR 20KW  
ASSY ROTOR 25KW  
HOUSING BLOWER  
SCREEN AIR OUTLET  
SCREW PPHM M5-0.8 X 8  
LOCK WASHER-#10  
WASHER FLAT M5  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25**  
26*  
27  
075554B  
0A9375  
022152  
097146  
042558  
0A5061  
0A4989  
052213  
051769  
049541  
046526  
045772  
082130B  
087599  
077043E  
4
4
4
1
1
1
1
1
6
4
4
4
1
1
1
BOLT,STATOR X 16"LG  
SCREW RHM #10-24 X 2  
WASHER LOCK #10  
FAN & RING GEAR ASSEM.  
KEY SQ 3/8 X 1 STEEL  
SPACER-FLEX PLATE  
PLATE, FLEX  
SCREW HHC M10-1.25 X 20 G8.8  
WASHER LOCK M12  
SCREW HHC M10-1.5 X 35 G8.8  
WASHER LOCK M10  
NUT HEX M10-1.5 G8 YEL CHR  
ASSY MPU SPEED SENSOR 48"  
PLUG PLASTIC 3/8 CAPLUG #2  
FLEX CONDUIT 1" BLCK  
(NOT SHOWN)  
WASHER FLAT 3/8 ZINC  
SPACER ROTOR SHAFT  
SCREW HHC M12-1.25 X 25 G8.8  
WASHER FLAT M12  
2
3
4
5
6
7
8
WASHER LOCK M8-5/16  
ASSY STATOR 10KW A  
ASSY STATOR 10KW D  
ASSY STATOR 10KW GJK  
ASSY STATOR 15KW 1PH A  
ASSY STATOR 15KW 3PH D  
ASSY STATOR 15KW 1PH GJK  
ASSY STATOR 20KW 1PH A  
ASSY STATOR 20KW 1PH A  
ASSY STATOR 20KW 1PH GJK  
ASSY STATOR 25KW 1PH A  
ASSY STATOR 25KW 1PH D  
ASSY STATOR 25KW 1PH D  
BEARING CARRIER REAR  
HOLDER, BRUSH ASSEM.  
SCREW HHC M4-0.7 X 20 G8.8  
COVER, REAR BEARING CARRIER  
28  
29  
30  
31  
32  
33  
35  
022131  
072578  
0A7043  
049808  
058589  
023365  
0A8830  
4
1
5
5
1
4
4
DECAL-WARNING  
WASHER SHAKEPROOF INT #8  
WASHER FLAT .34ID X .75OD  
9
10  
11  
12  
* USED ON PRE-PACKAGED UNITS ONLY  
** USED ON "C" OPTION PANEL UNITS ONLY  
®
G e n e r a c P o w e r S y s t e m s , In c . 3 9  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Natural Gas Fuel System — Drawing No. 0A9349E  
®
4 0 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Natural Gas Fuel System — Drawing No. 0A9349E  
ITEM  
PART NO.  
QTY.  
DESCRIPTION  
1
2
3
4
5
6
7
8
9
0C2632  
075580  
026915  
039253  
022145  
022129  
045771  
0A2666  
046747  
0C3714  
0A5547  
0C1475  
0A9911  
0A7989  
0A6593  
059402  
037561  
059403  
059401  
034154  
022152  
023897  
062522  
022127  
022259  
050280  
0A6125  
052219  
048031C  
029032  
029032  
032552  
0A4682  
042907  
055934D  
0A7040  
0C3153  
1
2
3
4
5
7
4
2
1
1
1
1
1
1
1
1
1
1
1
4
4
4
1
1
2
1
2
1
3
WELDMENT MOUNTING BASE  
FLANGE FUEL INLET  
NIPPLE CLOSE 3/4 X 1.375  
SCREW HHC-M8-1.25 X 20  
WASHER FLAT 5/16 ZINC  
WASHER LOCK M8-5/16  
NUT HEX M8-1.25 G8 YEL CHR  
SOLENOID GAS FUEL  
BUSHING REDUCER 3/4 TO 3/8  
ASSY HOSE NG/LPV.31"  
COVER AIR CLEANER  
REGULATOR NATURAL GAS EM  
REGULATOR L.P. GAS EM  
NIPPLE PIPE 3/8 NPT X 4 BLK IRON  
ADAPTOR CARBURETOR  
FILTER ELEMENT  
NUT WING 1/4-20 NYLK  
CARBURETOR, CA55 EM  
GASKET CARBURETOR  
SCREW PHM 10-24 X 1/2 CAD  
WASHER LOCK #10  
WASHER FLAT #10 ZINC  
STUD THR 1/4-20X3 F THR G2 ZNC  
NUT HEX 1/4-20 STEEL  
NUT HEX 5/16-18 STEEL  
DECAL FUEL INLET LPG  
STUD 5/16-18 X 1.25 F THR  
BARBED STR 1/8NPT X 5/16  
CLAMP HOSE BAND 1/4  
HOSE 9/32 ID  
11  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
6-1/2"  
11"  
1
1
1
1
1
1
HOSE 9/32 ID  
BARBED EL 90 5/16 X 1/8NPT  
MANIFOLD INTAKE 1.5  
SCREW HHC M8-1.25 X 16 G8.8  
CLAMP VINYL 1.06 X .406 Z  
BRACKET-RADIATOR HOSE  
TORX PLUS BHS M8 X 30  
®
G e n e r a c P o w e r S y s t e m s , In c . 4 1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Engine Compartment — Drawing No. 0A7642J  
®
4 2 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 7 - Exploded Views and Parts  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Exploded View – Engine Compartment — Drawing No. 0A7642J  
ITEM  
PART NO.  
QTY. DESCRIPTION  
ITEM  
PART NO.  
QTY. DESCRIPTION  
BARBED EL 90 3/8NPT X 5/8  
1
2
3
4
5
6
7
8
9
0A4531  
035685  
075546A  
0A45310258  
0A4355  
0A6699  
022097  
022507  
052212  
046526  
022131  
0C2499  
055993  
045772  
023586  
020692  
0A7005  
052243  
0A4772  
070901  
051735  
056768  
022145  
022129  
022259  
052213  
047411  
052830  
045771  
058306  
030795  
0A2711A  
048665  
075885  
0A45310257  
0A4682  
057522  
0A6751  
1
1
1
1
1
1
8
2
4
ENGINE-1.5L  
CLAMP HOSE #28 1.32 - 2.25  
PIPE-FLEX EXHAUST  
GASKET-EXHAUST MANIFOLD  
MANIFOLD-EXHAUST  
SHIELD HEAT EXHAUST  
WASHER LOCK M6-1/4  
SCREW HHC 1/4-20 X 1/2 G5  
SCREW HHC M10-1.25 X 25 G8.8  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
034339  
026925  
061012  
039253  
0A5110  
0A7006  
025507  
022500B  
0A8584  
036277  
042574  
026073A  
0A6701  
039414  
0A5568  
051769  
0A4804  
0A4800  
0A5839  
0A1354B  
0A4839  
055816  
049811  
075614  
0A2628  
0A5275  
0A5586  
0A4814  
0A45310244  
0C1852  
0912970066  
070928  
069860C  
069811  
0A5317  
022473  
1
1
1
6
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
4
4
1
1
1
1
1
1
1
1
1
1
1
1
2
PLUG STD PIPE 3/8 STEEL SQ HD  
PLUG STD PIPE 1/8 SCKT HD  
SCREW HHC M8-1.25 X 20 G8.8  
PIPE WATER-INLET  
O-RING 1-1/16X1-5/16X1/8  
WASHER SHAKEPROOF EXT 7/16 STL  
SPACER .41X.75X.25 ST/ZNC  
SWITCH OIL PRESSURE  
ELBOW 90D STREET 1/8  
ADAPTOR 1/8NPTF TO 1/8-28  
PLUG STD PIPE 1/4 STEEL SQ HD  
SCREW HHC M10-1.5 X 110 G8.8  
SCREW HHC M8-1.25 X 35 G8.8  
SCREW HHC M12-1.25 X 55 G8.8  
WASHER LOCK M12  
PULLEY-CRANKSHAFT (1800 RPM)  
PULLEY-CRANKSHAFT (3600 RPM)  
BRACKET - ALT SUPPRT  
DC ALTERNATOR-12V  
ARM ADJUST ALTERNATOR  
SCREW HHC M6-1.0 X 70 G8.8  
WASHER FLAT M6  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
14 WASHER-LOCK-M10  
16 WASHER FLAT 3/8 ZINC  
2
1
4
2
1
2
1
1
2
3
2
2
STAMPING ENG FOOT  
SPACER .41 X .75 X .12 STL/ZNC  
NUT HEX M10-1.5 G8 YEL CHR  
SCREW SHC 5/16-18 X 2 G8.8 NZ  
STARTER-12V  
SPACER .56 X 1 X .37 ST/ZNC  
SCREW HHC M10-1.5 X 60 G8.8  
ENGINE PLATE  
57  
58  
59  
60  
61  
62  
63  
64  
SLEEVE DOWEL BLHSG  
SCREW HHC M10-1.5 X 70 G8.8  
SCREW HHC M10-1.5 X 90 G8.8  
WASHER FLAT 5/16 ZINC  
23 WASHER LOCK M8-5/16  
FAN ENG PUSHER 6/380  
PULLEY - FAN 95 DIA  
V-BELT 3/8 X 32-1/8 1.5L  
V-BELT 3/8 X 28.9 1.5L  
SPACER PULLEY  
FILTER OIL  
2
1
2
2
NUT HEX 5/16-18 STEEL  
SCREW HHC M10-1.25 X 20 G8.8  
SCREW HHC M6-1.0 X 16 G8.8  
SCREW HHC M10-1.25 X 45 G8.8  
65  
66  
67  
68  
69  
70  
71  
72  
73  
10 NUT HEX M8-1.25 G8 YEL CHR  
5
2
1
1
1
1
1
1
1
SCREW SHC M8-1.25 X 25 G12.9  
SCREW HHC 5/16-18 X 1 G5  
ADAPTER-THERMOSTAT  
GASKET THERMOSTAT  
THERMOSTAT 195 DEG  
GASKET INLET MANIFOLD  
MANIFOLD-INTAKE  
ADAPTER DRAIN OIL  
GROUND WIRE (STARTER)  
CLAMP HOSE - OIL DRAIN  
HOSE ASM.-OIL DRAIN  
CAP HEX 1/4NPT BRASS  
NAMEPLATE ENGINE  
WASHER FLAT 1/4 ZINC  
SENSOR COOLANT LEVEL  
SW-TMP 245DEG 3/8NPT  
®
G e n e r a c P o w e r S y s t e m s , In c . 4 3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 8 — Installation  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Installation Drawing – Drawing No. 0C1450  
®
4 4 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 8 — Installation  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
Installation Drawing – Drawing No. 0C1450  
®
G e n e r a c P o w e r S y s t e m s , In c . 4 5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 9 — Notes  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
®
4 6 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 9 — Notes  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
®
G e n e r a c P o w e r S y s t e m s , In c . 4 7  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 9 – Warranty  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT  
YOUR WARRANTY RIGHTS AND OBLIGATIONS  
The California Air Resources Board (CARB) and Generac Power System s, Inc. (Generac) are pleased to explain the Em ission  
Control System Warranty on your new engine.* In California, new utility, and lawn and garden equipm ent engines m ust be  
designed, built and equipped to m eet the state’s stringent anti-sm og standards. Generac will warrant the em ission control  
system on your engine for the periods of tim e listed below provided there has been no abuse, neglect, unapproved m odifi-  
cation or im proper m aintenance of your engine.  
Your em ission control system m ay include parts such as the carburetor, ignition system and exhaust system . Generac will  
repair your engine at no cost to you for diagnosis, replacem ent parts and labor, should a warrantable condition occur.  
MANUFACTURER’S EMISSION CONTROL SYSTEM WARRANTY COVERAGE:  
Em issions control system s on 1995 and later m odel year engines are warranted for two years as hereinafter noted. If, dur-  
ing such warranty period, any em ission-related com ponent or system on your engine is found to be defective in m aterials or  
workm anship, repairs or replacem ent will be perform ed by a Generac Authorized Warranty Service Facility.  
PURCHASER’S/ OWNER’S WARRANTY RESPONSIBILITIES:  
As the engine purchaser/owner, you are responsible for the com pletion of all required m aintenance as listed in your factory  
supplied Owner’s Ma nua l. For warranty purposes, Generac recom m ends that you retain all receipts covering m aintenance  
on your engine. However, Generac cannot deny warranty solely due to the lack of receipts or for your failure to ensure the  
com pletion of all scheduled m aintenance.  
As the engine purchaser/owner, you should, however, be aware that Generac m ay deny any and/or all warranty coverage or  
responsibility if your engine, or a part/com ponent thereof, has failed due to abuse, neglect , im proper m aintenance or unap-  
proved m odifications, or the use of counterfeit and/or “grey m arket” parts not m ade, supplied or approved by Generac.  
You are respon sible for presen tin g your en gin e to a Gen erac Auth orized Warran ty Service Facility as soon as a prob-  
lem occurs. The warranty repairs should be com pleted in a reasonable am ount of tim e, not to exceed 30 days.  
Warranty service can be arranged by contacting either your selling dealer or a Generac Authorized Warranty Service Facility.  
To locate the Generac Authorized Warranty Service Facility nearest you, call our toll-free num ber:  
1-800-333-1322  
IMPORTANT NOTE: This warranty statem ent explains your rights and obligations under the Em ission Control System  
Warranty (ECS Warranty), which is provided to you by Generac pursuant to California law. See also the “Generac Lim ited  
Warranties for Generac Power System s, Inc.,” which is enclosed herewith on a separate sheet, also provided to you by  
Generac. The ECS Warranty applies on ly to the em ission control system of your new engine. If there is any conflict in term s  
between the ECS Warranty and the Generac Warranty, the ECS Warranty shall apply except in circum stances where the  
Generac Warranty m ay provide a longer warranty period. Both the ECS Warranty and the Generac Warranty describe im por-  
tant rights and obligations with respect to your new engine.  
Warranty service can be perform ed only by a Generac Authorized Warranty Service Facility. When requesting warranty serv-  
ice, evidence m ust be presented showing the date of the sale to the original purchaser/owner.  
If you h ave an y question s regardin g your warran ty righ ts an d respon sibilities, you sh ould con tact Gen erac at th e fol-  
lowin g address:  
ATTENTION WARRANTY DEPARTMENT  
GENERAC POWER SYSTEMS, INC.  
P.O. BOX 8  
WAUKESHA, WI 53187  
Pa r t 1  
®
4 8 G e n e r a c P o w e r S y s t e m s , In c .  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 9 – Warranty  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
EMISSION CONTROL SYSTEM WARRANTY  
Em ission Control System Warranty (ECS Warranty) for 1995 and later m odel year engines:  
(a) Applicability: This warranty shall apply to 1995 and later m odel year engines. The ECS Warranty Period shall begin on  
the date the new engine or equipm ent is purchased by/delivered to its original, end-use purchaser/owner and shall con-  
tinue for 24 consecutive m onths thereafter.  
(b) General Em issions Warranty Coverage: Generac warrants to the original, end-use purchaser/owner of the new engine or  
equipm ent and to each subsequent purchaser/owner that each of its engines is ...  
(1) Designed, built and equipped so as to conform with all applicable regulations adopted by the CARB pursuant to its  
authority, and  
(2) Free from defects in m aterials and workm anship which, at any tim e during the ECS Warranty Period, m ay cause a war-  
ranted em issions-related part to fail to be identical in all m aterial respects to the part as described in the engine m an-  
ufacturer’s application for certification.  
(c) The ECS Warranty only pertains to em issions-related parts on your engine, as follows:  
(1) Any warranted, em issions-related parts that are not scheduled for replacem ent as required m aintenance in the Owner’s  
Ma nua l shall be warranted for the ECS Warranty Period. If any such part fails during the ECS Warranty Period, it shall  
be repaired or replaced by Generac according to Subsection (4) below. Any such part repaired or replaced under the  
ECS Warranty shall be warranted for the rem ainder of the ECS Warranty Period.  
(2) Any warranted, em issions-related part that is scheduled only for regular inspection as specified in the Owner’s Ma nua l  
shall be warranted for the ECS Warranty Period. A statem ent in such written instructions to the effect of “repair or  
replace as necessary” shall not reduce the ECS Warranty Period. Any such part repaired or replaced under the ECS  
Warranty shall be warranted for the rem ainder of the ECS Warranty Period.  
(3) Any warranted, em issions-related part that is scheduled for replacem ent as required m aintenance in the Owner’s  
Ma nua l shall be warranted for the period of tim e prior to the first scheduled replacem ent point for that part. If the part  
fails prior to the first scheduled replacem ent, the part shall be repaired or replaced by Generac according to Subsection  
(4) below. Any such em issions-related part repaired or replaced under the ECS Warranty shall be warranted for the  
rem ainder of the ECS Warranty Period prior to the first scheduled replacem ent point for such em issions-related part.  
(4) Repair or replacem ent of any warranted, em issions-related part under this ECS Warranty shall be perform ed at no  
charge to the owner at a Generac Authorized Warranty Service Facility.  
(5) When the engine is inspected by a Generac Authorized Warranty Service Facility, the owner shall not be held responsi-  
ble for diagnostic costs if the repair is deem ed warrantable.  
(6) Generac shall be liable for dam ages to other original engine com ponents or approved m odifications proxim ately caused  
by a failure under warranty of any em ission-related part covered by the ECS Warranty.  
(7) Throughout the ECS Warranty Period, Generac shall m aintain a supply of warranted em ission-related parts sufficient  
to m eet the expected dem and for such em ission-related parts.  
(8) Any Generac authorized and approved em ission-related replacem ent part m ay be used in the perform ance of any ECS  
Warranty m aintenance or repairs and will be provided without charge to the owner. Such use shall not reduce Generac  
ECS Warranty obligations.  
(9) Unapproved, add-on, m odified, counterfeit and/or “grey m arket” parts m ay not be used to m odify or repair a Generac  
engine. Such use voids this ECS Warranty and shall be sufficient grounds for disallowing an ECS Warranty claim .  
Generac shall not be held liable hereunder for failures of any warranted parts of a Generac engine caused by the use of  
such an unapproved, add-on, m odified, counterfeit and/or “grey m arket” part.  
EMISSION RELATED PARTS INCLUDE THE FOLLOWING:  
1) Fuel Metering System :  
3) Ignition System including:  
a) Spark plug  
b) Ignition m odule  
1.2) LPG/Natural Gas carburetion assem bly and its internal  
com ponents.  
a) Fuel controller (if so equipped)  
4) Catalytic Muffler Assem bly (if so equipped) including:  
a) Muffler gasket  
b) Exhaust m anifold  
b) Mixer and its gaskets (if so equipped)  
c) Carburetor and its gaskets (if so equipped)  
d) Prim ary gas regulator (if so equipped)  
e) LP liquid vaporizer (if so equipped)  
5) Crankcase Breather Assem bly including:  
a) Breather connection tube  
2) Air Induction System including:  
a) Intake pipe/m anifold  
b) Air cleaner  
*Generac engine types covered by this warranty statem ent include the following:  
1) Prepackaged Standby Generator  
2) Auxiliary Power Unit (APU) Generator  
3) Standby Generator  
Pa r t 2  
®
G e n e r a c P o w e r S y s t e m s , In c . 4 9  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Section 9 – Warranty  
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators  
GENERAC’S STANDARD ONE-YEAR LIMITED WARRANTY FOR STANDBY POWER SYSTEMS  
For a period of one year or 1,500 hours of operation from the date of original sale, whichever occurs first, Generac Power  
System s, Inc. (Generac) will, at its option, repair or replace any part which, upon exam ination by Generac or a  
Generac/Guardian Authorized Warranty Service Facility, is found to be defective under norm al use and service, in accordance  
with the warranty schedule set forth below. Any equipm ent that the purchaser/owner claim s to be defective m ust be returned  
to  
and  
exam ined  
by  
the  
near est  
Gener ac/Guar d ian  
Author ized  
War r anty  
Ser vice  
Facility.  
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 generators used in “Standby” applications, as Standby has been defined by  
Generac, provided said generators have been initially installed and inspected on-site by a Generac/Guardian Authorized  
Service Dealer or branch thereof.  
WARRANTY SCHEDULE  
YEAR ONE – 100 percent coverage on m ileage*, labor and parts listed:  
• En gin e – All com ponents  
• Altern ator – All com ponents  
• Tran sfer System – All com ponents  
*Tr a vel a llow a n ce is lim ited to 3 0 0 m iles or 7 .5 h ou r s , w h ich ever occu r s fir s t, a n d a pplies on ly to per m a n en tly w ir ed a n d  
m ou n ted u n its .  
All warranty expense allowances are subject to the conditions defined in Generac’s Warranty Policies, Procedures and Flat  
Rate Manual.  
Units that have been resold are not covered under the Generac warranty, as this warranty is not transferable.  
THIS WARRANTY SHALL NOT APPLY TO THE FOLLOWING:  
1. Costs of norm al m aintenance, adjustm ents, installation and start-up.  
2. Units sold, rated or used for “Prim e Power” applications as Prim e Power has been defined by Generac. Contact a dis-  
tributor for Prim e Power definition and warranty.  
3. Failures due to (a) norm al wear and tear, or (b) accident, m isuse, abuse, negligence or im proper installation.  
4. Products that are m odified or altered in a m anner not authorized by Generac in writing.  
5. Any incidental, consequential or indirect dam ages caused by defects in m aterials or workm anship, or any delay in repair  
or replacem ent of the defective parts.  
6. Failure due to m isapplication.  
7. Telephone, telegraph, teletype or other com m unication expenses.  
8. Living or travel expenses of persons perform ing service, except as specifically included within the term s of a specific unit  
warranty.  
9. Rental equipm ent used while warranty repairs are being perform ed.  
10. Overtim e labor.  
11. Starting batteries, fuses, light bulbs and engine fluids.  
THIS WARRANTY IS IN PLACE OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED. SPECIFICALLY, GENERAC MAKES  
NO OTHER WARRANTIES AS TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Som e states do not  
allow lim itations on how long an im plied warranty lasts, so the above lim itation m ay not apply to you.  
GENERAC’S ONLY LIABILITY SHALL BE THE REPAIR OR REPLACEMENT OF PARTS 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. Som e states do not allow the exclusion or lim itation of incidental or  
consequential dam ages, so the above lim itation m ay not apply to you. Purchaser/owner agrees to m ake no claim s against  
Generac based on negligence.  
This warranty gives you specific legal rights. You also m ay have other rights that vary from state to state.  
®
G E N E R A C P O W E R S Y S T E M S , IN C .  
P .O . B O X 8  
W AU K E S H A, W I 5 3 1 8 7  
P a r t N o . C 8 8 4 0  
R e v is io n 0 (0 4 / 2 5 / 0 1 )  
P r in t e d in U .S .A .  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Navigon GPS Receiver 92 PLUS User Manual
NEC Water System N 1093100 User Manual
Nikon Projector LT180 User Manual
Nilfisk ALTO Vacuum Cleaner GD 911 Battery User Manual
Nuvo Speaker System NV AP16OW User Manual
Omron Fitness Electronics HJ 320 User Manual
Optoma Technology Projector Accessories EP7150RFBA User Manual
Panasonic All in One Printer UF 5950 User Manual
Panasonic Digital Camera DMC FS5 User Manual
Paradox Hellas SA Door DGP2 640 User Manual