Generac Power Systems 6055 User manual

ii Synergy Automatic Standby Generator Owner’s Manual
Use this page to record important information about your generator set.
Record the information found on your unit data label on this page for quick and easy
reference. The label is affixed to the inside partition left of the control pad. For direc-
tions on how to open the lid and remove the front panel, see Section 3 Operation.
The Unit Identification label provides the following information:
 Model Number
 Serial Number
 Control Board Part Number
 Voltage Rating of the unit
 Maximum Current Rating of the unit (AMPS)
When contacting an independent Authorized Service Dealer about parts and service,
always supply the complete model number and serial number of the unit.
Operation and Maintenance: Proper maintenance and care of the generator
ensures a minimum number of problems and keeps operating expenses at a mini-
mum. It is the operator’s responsibility to perform all safety checks, to make sure that
all maintenance for safe operation is performed promptly, and to have the equipment
checked periodically by an independent Authorized Service Dealer. Normal mainte-
nance, service and replacement of parts are the responsibility of the owner/operator
and, as such, are not considered defects in materials or workmanship within the
terms of the warranty. Individual operating habits and usage may contribute to the
need for additional maintenance or service.
When the generator requires servicing or repairs, contact an independent Authorized
Service Dealer for assistance. Authorized service technicians are factory-trained and
are capable of handling all service needs.
To find your Local Independent AUTHORIZED SERVICE DEALER
INDEPENDENT AUTHORIZED
SERVICE
DEALER LOCATION
To locate the nearest INDEPENDENT
AUTHORIZED SERVICE DEALER, please
call this number:
1-800-333-1322
or, visit the dealer locator at:
www.generac.com/Service/Dealer Locator/
(000005)
WARNING
California Proposition 65. This product contains or
emits chemicals known to the state of California to
cause cancer, birth defects, and other reproductive
harm.
(000004)
WARNING
California Proposition 65. Engine exhaust and some of
its constituents are known to the state of California to
cause cancer, birth defects, and other reproductive
harm.

Table of Contents
Synergy Automatic Standby Generator Owner’s Manual iii
Section 1 Safety
1.1 Introduction .......................................................................................................................... 1
1.2 General Safety ...................................................................................................................... 2
1.3 General Safety Hazards ....................................................................................................... 2
1.4 Exhaust Hazards .................................................................................................................. 3
1.5 Electrical Hazards ................................................................................................................ 3
1.6 Fire Hazards .......................................................................................................................... 3
1.7 Explosion Hazards ............................................................................................................... 4
Section 2 General Information
2.1 Synergy Operating Principle ............................................................................................... 5
2.1.1 Benefits ......................................................................................................................................... 5
2.1.2 Start Up ......................................................................................................................................... 5
2.1.3 Normal Running ............................................................................................................................ 5
2.1.4 Small Load Changes .................................................................................................................... 5
2.1.5 Large Load (Not Overload) ........................................................................................................... 5
2.1.6 Overload ....................................................................................................................................... 6
2.1.7 Low Speed Exercise ..................................................................................................................... 6
2.1.8 Normal Exercise ...........................................................................................................................6
2.1.9 Automatic Voltage Regulator (AVR) Cooling Fans ....................................................................... 6
2.2 The Generator ....................................................................................................................... 7
2.3 Protection Systems .............................................................................................................. 8
2.3.1 Alarms ........................................................................................................................................... 8
2.3.2 Warnings ....................................................................................................................................... 8
2.4 Emission Information .......................................................................................................... 8
2.5 Specifications ....................................................................................................................... 9
2.5.1 Generator ...................................................................................................................................... 9
2.5.2 Engine ........................................................................................................................................... 9
2.5.3 Fuel Requirements .....................................................................................................................10
2.5.4 Battery Requirements .................................................................................................................10
2.5.5 Battery Charger ..........................................................................................................................10
2.5.6 Engine Oil Requirements ............................................................................................................10
2.6 Accessories ........................................................................................................................ 10
Section 3 Operation
3.1 Control Pad ......................................................................................................................... 13
3.2 Auto/Manual/Off ................................................................................................................. 14
3.3 Menu Navigation ................................................................................................................ 15
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Table of Contents
iv Synergy Automatic Standby Generator Owner’s Manual
3.4 Change Time and Date .......................................................................................................15
3.5 Programmable Timers ........................................................................................................15
3.5.1 Dealer Programmable ................................................................................................................ 15
3.5.1.1 High Run Speed Timer ....................................................................................................... 15
3.5.1.2 Start-Up Delay Timer .......................................................................................................... 15
3.5.2 User Programmable ................................................................................................................... 16
3.5.2.1 Exercise Time ..................................................................................................................... 16
3.6 USB Port for Firmware Updates ........................................................................................16
3.7 Transfer Switch Automatic Operation ..............................................................................18
3.7.1 Automatic Sequence of Operation .............................................................................................. 18
3.7.1.1 Utility Failure ....................................................................................................................... 18
3.7.1.2 Cranking.............................................................................................................................. 18
3.7.1.3 Load Transfer...................................................................................................................... 18
3.7.2 Load Shed Functionality ............................................................................................................. 19
3.8 Transfer Switch Manual Operation ...................................................................................19
3.8.1 Transfer to Generator Power ...................................................................................................... 19
3.8.2 Transfer Back to Utility Power .................................................................................................... 19
3.9 Removal From Service During Utility Outages ................................................................20
3.10 Side Door Compartment ..................................................................................................21
3.10.1 LED Indicators .......................................................................................................................... 21
3.10.2 120V GFCI Outlet/15 Amp Breaker .......................................................................................... 21
3.11 Battery Charger ................................................................................................................22
3.12 Setting the Exercise Timer ..............................................................................................22
Section 4 Maintenance
4.1 Maintenance ........................................................................................................................23
4.2 Maintenance Kits ................................................................................................................23
4.3 Service Maintenance Schedule .........................................................................................23
4.4 Remove From Service ........................................................................................................24
4.5 Daily Maintenance (If Running Continuously) .................................................................24
4.5.1 Check Enclosure Louvers ........................................................................................................... 24
4.5.2 Check Lines and Connections .................................................................................................... 25
4.5.3 Check Engine Oil Level .............................................................................................................. 25
4.5.3.1 Engine Oil Recommendations ............................................................................................ 25

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Synergy Automatic Standby Generator Owner’s Manual v
4.6 Schedule A Maintenance ................................................................................................... 26
4.6.1 Check Battery Condition/Fluid Level ...........................................................................................26
4.6.1.1 Check Condition and Clean ................................................................................................ 26
4.6.1.2 Check Fluid Level ............................................................................................................... 26
4.6.1.3 Check State of Charge........................................................................................................ 26
4.6.1.4 Battery Replacement .......................................................................................................... 26
4.6.2 Replace AVR Filter ..................................................................................................................... 27
4.6.3 Replace Engine Oil and Oil Filter ................................................................................................27
4.7 Schedule B Maintenance ................................................................................................... 29
4.7.1 Replace Engine Air Filter ............................................................................................................29
4.7.2 Clean/Gap/Replace Spark Plugs ................................................................................................29
4.7.3 Check/Adjust Valve Clearance ...................................................................................................30
4.7.3.1 Check Valve Clearance ...................................................................................................... 30
4.7.3.2 Adjust Valve Clearance....................................................................................................... 31
4.8 Return to Service ............................................................................................................... 32
4.9 Attention After Submersion .............................................................................................. 32
4.10 Corrosion Protection ....................................................................................................... 32
4.11 Out of Service Procedure ................................................................................................ 32
4.11.1 Remove For Storage ................................................................................................................32
4.11.2 Return To Service After Storage ...............................................................................................33
Section 5 Troubleshooting
5.1 Engine Troubleshooting .................................................................................................... 35
5.2 Generator Troubleshooting ............................................................................................... 36
5.3 Synergy Troubleshooting .................................................................................................. 38
5.4 Load Shed Troubleshooting ............................................................................................. 40

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vi Synergy Automatic Standby Generator Owner’s Manual
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Synergy Automatic Standby Generator Owner’s Manual 1
Section 1 Safety
1.1 — Introduction
Thank you for purchasing this compact, high performance, variable speed, air-cooled, engine-driven stationary auto-
matic standby generator set. Every effort was made to make sure that the information and instructions in this manual
were both accurate and current at the time the manual was written. However, the manufacturer reserves the right to
change, alter or otherwise improve this product or manual at any time without prior notice.
This generator is designed to automatically supply electrical power to operate critical loads during a utility power failure.
This unit is factory installed in an all-weather metal enclosure and is intended exclusively for outdoor installation.
This generator will operate using either vapor withdrawn liquid propane (LP) or natural gas (NG).
NOTE: When properly sized, this generator is suitable for supplying typical residential loads such as Induction Motors
(sump pumps, refrigerators, air conditioners, furnaces, etc.), Electronic Components (computer, monitor, TV, etc.),
Lighting Loads and Microwaves.
READ THIS MANUAL THOROUGHLY: The operator is responsible for proper and safe use of this equipment. The
manufacturer strongly recommends that the operator read and thoroughly understand the instructions and contents of
this owner’s manual before attempting to use the equipment. If any portion of this publication is not understood, contact
the nearest Authorized Service Dealer for starting, operating and servicing procedures.
SAVE THESE INSTRUCTIONS: The manufacturer suggests that this manual and the rules for safe operation be cop-
ied and posted near the unit’s installation site. Safety should be stressed to all operators and potential operators of this
equipment.
SAFETY: Throughout this manual, and on tags and decals affixed to the unit, DANGER, WARNING, CAUTION and
NOTE blocks are used to alert personnel to special instructions about a particular operation, function or service that
may be hazardous if performed incorrectly or carelessly. Observe them carefully. Their definitions are as follows:
NOTE: Notes contain additional information important to an operation or procedure.
(000001)
DANGER
Indicates a hazardous situation which, if not avoided, will
result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.

Safety
2 Synergy Automatic Standby Generator Owner’s Manual
Four commonly used safety symbols accompany the DANGER, WARNING and CAUTION blocks. The type of informa-
tion each indicates is as follows:
This symbol points out important Safety Information that, if not followed, could endanger personal safety and/or
property of others.
This symbol points out a potential Explosion Hazard.
This symbol points out a potential Fire Hazard.
This symbol points out a potential Electrical Shock Hazard.
These “Safety Alerts” cannot eliminate the hazards that they signal. Strict compliance with these special instructions,
plus common sense are major accident prevention measures.
1.2 — General Safety
Study these safety rules carefully before operating or servicing this equipment. Become familiar with this Owner’s Man-
ual and with the unit. The generator can operate safely, efficiently and reliably only if it is properly installed, operated
and maintained. Many accidents are caused by failing to follow simple and fundamental rules or precautions.
The manufacturer cannot anticipate every possible circumstance that might involve a hazard. The warnings in this
manual, and on tags and decals affixed to the unit are, therefore, not all-inclusive. If using a procedure, work method or
operating technique the manufacturer does not specifically recommend, ensure that it is safe for personnel. Also make
sure the procedure, work method or operating technique utilized 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 and maintain this equipment.
Potentially lethal voltages are generated by these machines. Ensure steps are taken to make
the machine safe before attempting to work on the generator.
Parts of the generator are rotating and/or hot during operation. Exercise care near a running
generator.
The installation of this generator must always comply with applicable codes, standards, laws
and regulations.
A running generator gives off DEADLY carbon monoxide, an odorless, colorless, poisonous
gas. Breathing carbon monoxide can cause dizziness, throbbing temples, nausea, muscular
twitching, headache, vomiting, weakness, sleepiness, inability to think clearly, fainting, uncon-
sciousness or even death.
The control panel for this unit is intended to be operated by qualified service personnel only.
1.3 — General Safety Hazards
For safety reasons, this equipment should only be installed, serviced and repaired by a Service Dealer or other
competent, qualified electrician or installation technician who is familiar with applicable codes, standards, regula-
tions and product Installation Manual guidelines. The operator also must comply with all such codes, standards,
regulations and product Installation Manual guidelines.
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Safety
Synergy Automatic Standby Generator Owner’s Manual 3
The engine exhaust fumes contain carbon monoxide, which can be DEADLY. This dangerous gas, if breathed in
sufficient concentrations, can cause unconsciousness or even death. DO NOT alter or add to the exhaust system
or do anything that might render the system unsafe or in noncompliance with applicable codes and standards.
Install a carbon monoxide alarm indoors, according to manufacturer’s instructions/recommendations.
Adequate, unobstructed flow of cooling and ventilating air is critical for correct generator operation. Do not alter
the installation or permit even partial blockage of ventilation provisions, as this can seriously affect safe operation
of the generator. The generator MUST be installed and operated outdoors only.
Keep hands, feet, clothing, etc. away from drive belts, fans, and other moving or hot parts. Never remove any
drive belt or fan guard while the unit is operating.
When working on this equipment, remain alert at all times. Never work on the equipment when physically or men-
tally fatigued.
Inspect the generator regularly, and contact the nearest Dealer for parts needing repair or replacement.
Before performing any maintenance on the generator, remove the control panel fuse and disconnect the Nega-
tive (—) battery cable to prevent accidental startup. When disconnecting battery cables always remove the NEG-
ATIVE (NEG or “—”) cable first, then remove the POSITVE (POS, or “+”) cable. When reconnecting the cables,
connect the POSITIVE cable first, and the NEGATIVE cable last.
Never use the generator or any of its parts as a step. Stepping on the unit can stress and break parts, and may
result in dangerous operating conditions from leaking exhaust gases, fuel leakage, oil leakage, etc.
1.4 — Exhaust Hazards
Generator engine exhaust contains DEADLY carbon monoxide, an odorless, colorless, poisonous gas. Breathing
carbon monoxide can cause dizziness, throbbing temples, nausea, muscular twitching, headache, vomiting,
weakness, sleepiness, inability to think clearly, fainting, unconsciousness or even death. If any carbon monoxide
poisoning symptom is experienced, move into fresh air and immediately seek medical attention.
This generator is designed for OUTDOOR installation ONLY. Never operate the generator inside any garage or
other enclosed space.
1.5 — Electrical Hazards
All generators covered by this manual produce dangerous electrical voltages that can cause fatal electrical
shock. Utility power delivers extremely high and dangerous voltages to the transfer switch, as does the standby
generator when it is in operation. Avoid contact with bare wires, terminals, connections, etc. while the unit is run-
ning. Ensure all appropriate covers, guards and barriers are in place, secured and/or locked before operating the
generator. If work must be done around an operating unit, stand on an insulated, dry surface to reduce potential
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.
This is an Automatic Standby Generator, the generator may crank and start at any time when utility is lost. When
this occurs, load circuits are transferred to the STANDBY (generator) power source. To prevent injury, before
working on this generator (for inspection, service or maintenance), always put the generator into the OFF mode
and remove the 7.5 Amp fuse from the generator control panel.
In case of accident caused by electric shock, immediately shut down the source of electrical power. If this is not
possible, attempt to free the victim from the live conductor. AVOID DIRECT CONTACT WITH THE VICTIM. Use
a nonconducting implement, such as a dry rope or board, to free the victim from the live conductor. If the victim is
unconscious, apply first aid and get immediate medical help.
Never wear jewelry when working on this equipment. Jewelry can conduct electricity resulting in electric shock,
or may get caught in moving components resulting in injury.
1.6 — Fire Hazards
For fire safety, the generator must be installed and maintained properly. Installation MUST always comply with
applicable codes, standards, laws, regulations and product Installation Manual guidelines. Adhere strictly to
local, state, and national electrical and building codes. Comply with regulations the Occupational Safety and

Safety
4 Synergy Automatic Standby Generator Owner’s Manual
Health Administration (OSHA) has established. Also, ensure that the generator is installed in accordance with the
manufacturer’s instructions and recommendations. Following proper installation, do nothing that might alter a
safe installation and render the unit in noncompliance with the aforementioned codes, standards, laws and regu-
lations.
Keep a fire extinguisher near the generator at all times. Extinguishers rated “ABC” by the National Fire Protection
Association are appropriate for use on the standby generator. Keep the extinguisher properly charged and be
familiar with its use. Consult the local fire department with any questions pertaining to fire extinguishers.
1.7 — Explosion Hazards
Do not smoke around the generator. Wipe up any fuel or oil spills immediately. Ensure that no combustible mate-
rials are left in the generator compartment, or on or near the generator as FIRE or EXPLOSION may result. Keep
the area surrounding the generator clean and free from debris.
Gaseous fluids such as natural gas and liquid propane (LP) gas are extremely EXPLOSIVE. Install the fuel sup-
ply system according to applicable fuel-gas codes. Before placing the home standby electric system into service,
fuel system lines must be properly purged and leak tested according to applicable code. After installation, inspect
the fuel system periodically for leaks. No leakage can be permitted.
If this generator is used to power electrical load circuits normally powered by a utility power
source, it is required by code to install a transfer switch. The transfer switch must effectively
isolate the electrical system from the utility distribution system when the generator is
operating (NEC 702). Failure to isolate an electrical system by such means will result in
damage to the generator and also may result in injury or death to utility power workers due
to backfeed of electrical energy.
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Synergy Automatic Standby Generator Owner’s Manual 5
Section 2 General Information
2.1 — Synergy Operating Principle
2.1.1— Benefits
The Synergy 20 kW generator brings exciting new technology to the Home Standby generator product. The generator
is significantly more fuel efficient than constant speed generators at normal loads, provides premium power quality, and
is significantly quieter while operating at exercise and normal loads.
Exceptionally quiet exercise at 57 dB
Quieter operation - 3 dB with improved tonal qualities at exercise and under normal loads
Cleanest Standby power available with 1.5 THD
Significant fuel savings: more fuel efficient under normal loads
Lower operating speed at 2700 rpm at low loads
Tuned Helmhortz resonator and muffler to further lower sound levels
Variable Speed / Constant Frequency operation
2.1.2— Start Up
When the generator starts up, the engine ramps up to 3600 RPM to produce maximum power. This ensures that there
is sufficient power to carry the load when the transfer switch operates. The engine RPM then gradually ramps down to
a speed appropriate for the attached load.
For example, if there is no load, the engine ramps down to approximately 2700 RPM. The time it takes to ramp down to
2700 RPM is approximately 4-5 minutes. Since the ramp rate is linear, less time would be required for it to ramp down
to only 3400 RPM.
During startup, as the engine ramps up to 3600 RPM, the Automatic Voltage Regulator (AVR) electronics performs a
self test (before transfer) involving an overall system check of the unit. If a fault is detected, the unit shuts down and
displays an alarm.
2.1.3— Normal Running
The engine operates between 2700 RPM - 3600 RPM depending on the attached load. When the load increases or
decreases, the speed increases or decreases accordingly.
2.1.4— Small Load Changes
The system is designed to maintain the current engine speed for small load changes. Larger load changes result in a
change in engine speed to appropriately handle the load.
2.1.5— Large Load (Not Overload)
The engine always runs at a speed appropriate for the attached load. When a large load is applied, the fast Loadshed
signal is activated. All loads attached to the Loadshed controller in the transfer switch are dropped and the engine
speed immediately increases to 3600 RPM. Five seconds later, the Loadshed signal is deactivated and Loads 3 and 4
are sequenced back on, spaced 15 seconds apart. Loads 1 and 2, which are designed for air conditioners, are
sequenced back on after 5 minutes.
The engine speed remains at 3600 RPM for a programmable time (20 minutes default) and then ramps down to the
speed appropriate for the attached load. The programmable time can be changed by the dealer to prevent annoying
ramps up and down in engine speed if large loads turn on and off frequently.

General Information
6 Synergy Automatic Standby Generator Owner’s Manual
2.1.6— Overload
If a load is sensed that is too large for the engine, that load will be locked out for a period of 30 minutes. If the load is
not connected through a fast Loadshed enabled controller and module, then the generator shuts down with an “Over-
load” alarm.
2.1.7— Low Speed Exercise
Low speed exercise operates at 1950 RPM for five minutes. The output voltage and frequency will not be at the rated
voltage and frequency during exercise.
2.1.8— Normal Exercise
Normal exercise is at 3600 RPM at normal voltage and frequency levels for 5 minutes.
2.1.9— Automatic Voltage Regulator (AVR) Cooling Fans
The system is equipped with two fans to cool the AVR electronics. The primary fan is powered by AC during operation.
The secondary fan is powered by 12V DC through the controller. The fans are monitored during operation and if a fail-
ure occurs, an alarm is displayed.
The secondary fan continues to operate for up to one hour after the generator is shut down. Proper cooling must occur
before removing battery connections for maintenance or other service activity.
If utility is present, the secondary 12V DC fan continues to operate for up to one hour after the genera-
tor is shut down (even if the 7.5 amp ATO fuse is removed). To avoid hand injury, always exercise cau-
tion when working near the AVR fan housing.
NOTE: The AVR cooling air inlet includes a filter. Verify the filter is installed and properly seated at time the
unit is installed. Check the filter at regular maintenance intervals to verify proper airflow.
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General Information
Synergy Automatic Standby Generator Owner’s Manual 7
2.2 — The Generator
Figure 2-1. Component Locations
A. Automatic Voltage Regulator (AVR) H. Circuit Breakers
B. Oil Dipstick I. Fuel Inlet (Back)
C. Oil Fill Cap J. Fuel Regulator
D. Engine Air Filter K. Battery Compartment
E. AVR Air Filter L. Oil Filter
F. Data Label M. Composite Base
G. Control Pad N. Exhaust Enclosure
A
BC
D E
F
G
H
I
J
K
L
M
N

General Information
8 Synergy Automatic Standby Generator Owner’s Manual
2.3 — Protection Systems
The owner/operator is alerted to Alarm and/or Warning conditions via the control pad LCD screen. All Alarm conditions
cause the generator to shut down. The Warning messages alert the operator to conditions that do not disable the unit,
require immediate correction, or result in shut down.
Some of the possible Alarm/Warning messages are listed below.
NOTE: For Synergy specific alarms, see Subsection 5.3 — Synergy Troubleshooting.
2.3.1— Alarms
2.3.2— Warnings
The above list is not all inclusive. For more information about alarms, see Section 5 Troubleshooting.
NOTE: A WARNING alerts the operator to a condition that must be addressed, but does not shut down the gen-
erator. An ALARM shuts down the generator to protect the unit from damage. In the event of an alarm, the
owner may clear the alarm and restart the generator. If the alarm occurs again, contact your independent ser-
vicing dealer.
2.4 — Emission Information
The U.S. Environmental Protection Agency (EPA) requires that this generator comply with exhaust emission standards.
This generator is certified to meet the applicable EPA emission levels, and is certified for use as a stationary engine for
standby power generation. Any other use may be a violation of federal and/or local laws. To ensure that the engine
complies with applicable emission standards for the duration of its service life, it is important to perform the mainte-
nance tasks described in Subsection 4.3 — Service Maintenance Schedule. This generator is certified to operate on
Liquid Propane Vapor fuel or pipeline Natural Gas.
The Emission Control System code is EM (Engine Modification). The Emission Control System on this generator may
consist of the following components:
High Temperature
Low Oil Pressure
Overcrank
Overspeed
Underspeed
RPM Sensor Loss
Wiring Error
Overvoltage
Undervoltage
Fuse Problem
Overload
Stepper Overcurrent
Charger Warning
Charger Missing AC
Low Battery
Exercise Set Error
USB Warning
Download Failure
Air Induction System
– Intake Pipe / Manifold
– Air Cleaner
Ignition System
– Spark Plug
– Ignition Module
Fuel Metering System
– Carburetor / Mixer
Assembly
– Fuel Regulator
Exhaust System
– Exhaust Manifold
– Muffler

General Information
Synergy Automatic Standby Generator Owner’s Manual 9
2.5 — Specifications
2.5.1— Generator
2.5.2— Engine
The specification sheet for this generator was included in the documentation provided with the unit at the time of pur-
chase. For additional copies, consult your local Authorized Independent Service Dealer.
Model 20 kW Synergy
Rated Voltage 240
Rated Maximum Load
Current (Amps) at 240 Volts (LP)*
83.3
Main Circuit Breaker 90 Amp
Phase 1
Rated AC Frequency 60 Hz
Battery Requirement Group 26R, 12 Volts and 525 CCA Minimum (Generac Part No. 0H3421S)
Unit Weight in Lbs. (kilos) 509 (231)
Enclosure Aluminum
Normal Operating Range This unit is tested in accordance to UL 2200 standards with an operating temperature of
-20º F (-29º C) to 122º F (50º C). For areas where temperatures fall below 32º F (0º C) a
cold weather kit is required. When operated above 77º F (25º C) there may be a decrease in
engine power. Please reference the engine specifications section.
These generators are rated in accordance with UL 2200, Safety Standard for Stationary Engine Generator Assemblies, and CSA-
C22.2 No. 100-04
Standard for Motors and Generators.
* Natural Gas ratings will depend on specific fuel Btu/joules content. Typical derates are between 10-20% off the LP gas rating.
Model 20 kW Synergy
Type of Engine GT-999
Number of Cylinders 2
Displacement 999 cc
Cylinder Block Aluminum w/Cast Iron Sleeve
Recommended Spark Plug RC12YC
Spark Plug Gap 1.02 mm (0.040 in)
Starter 12 VDC
Oil Capacity Including Filter Approx. 1.9 Qt/1.8 L
Recommended Oil Filter Part #070185E
Recommended Air Filter Part #0J8478
Engine power is subject to and limited by such factors as fuel Btu/joules content, ambient temperature and altitude. Engine power
decreases about 3.5 percent for each 1,000 feet (304.8 meters) above sea level, and also will decrease about 1 percent for each
6º C (10º F) above 15º C (60º F) ambient temperature.

General Information
10 Synergy Automatic Standby Generator Owner’s Manual
2.5.3— Fuel Requirements
The engine has been fitted with a dual fuel carburetion system. The unit will run on natural gas or LP gas (vapor), but it
has been factory set to run on natural gas. The fuel system is configured for the selected fuel source during installation.
Recommended fuels should have a btu content of at least 1,000 Btus per cubic foot (37.26 megajoules per cubic
meter) for natural gas, or at least 2,500 Btus per cubic foot (93.15 megajoules per cubic meter) for LP gas (vapor).
If converting to LP gas from natural gas, a minimum LP tank size of 250 gallons (946 liters) is recommended. See the
Installation Manual for complete procedures and details.
Gaseous fuels such as natural gas and liquid propane gas are highly explosive. Any 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.
2.5.4— Battery Requirements
Group 26R, 12V, minimum 525CCA (Generac Part No. 0H3421S).
For proper battery maintenance, see Subsection 4.6.1— Check Battery Condition/Fluid Level.
2.5.5— Battery Charger
The battery charger is integrated into the control system. It operates as a “Smart Charger,” which ensures output
charging levels are safe and continuously optimized to promote maximum battery life.
2.5.6— Engine Oil Requirements
For correct engine oil type, see Subsection 4.5.3.1— Engine Oil Recommendations.
2.6 — Accessories
See Table 2-1. The following accessories are available.
Table 2-1. Accessories
Accessory Description
Cold Weather Kit Required in areas where temperatures fall below 32 º F (0 º C).
Scheduled Maintenance
Kit
Includes all pieces necessary to perform maintenance on the generator along with oil recom-
mendations.
Auxiliary Transfer Switch
Lockout
Enables any of the transfer switches to completely lock out one large electrical load by tying
into its control system.
Fascia Skirt Wrap Standard on all 22 kW units. Available for all current production air-cooled units that don't
include it. It snaps together, around the base and mounting pad of the generator, to provide a
smoothing, contoured look as well as rodent/insect protection. Requires use of the mounting
pad shipped with the generator.
Mobile Link™ Provides a personalized web portal that displays the generator’s status, maintenance schedule,
event history and much more. This portal is accessible via computer, tablet or smart phone.
Sends emails and/or text notifications the moment there is any change in the generator’s sta-
tus. Notification settings can be customized to what type of alert is sent and how often. For
more information, visit www.standbystatus.com.
Wireless Local Monitor Completely wireless and battery powered, the Wireless Local Monitor provides you with instant
status without ever leaving the house. Status lights (red, yellow and green) alert owners when
the generator needs attention. Magnetic backing permits refrigerator mounting and gives a 600
foot line of sight communication.
$

General Information
Synergy Automatic Standby Generator Owner’s Manual 11
Contact an independent authorized Dealer for additional information on accessories.
Power Management Mod-
ule (PMM) Starter Kit
Includes one module with transformer. The transformer, which is mounted inside the ATS enclo-
sure, interfaces with the OPCB to generate the 24 Vac signal needed for control of the contac-
tor (Load 1 on the OPCB).
Power Management Mod-
ule (PMM)
Includes one module only. To achieve full system functionality, a total of three kits are required
to allow control of the three remaining contactors (Loads 2/3/4 on the OPCB).
Touch-Up Paint Kit Very important to maintain the look and integrity of the generator enclosure. This kit includes
touch-up paint and instructions.
Extended Warranty Cov-
erage
Extend your generator’s warranty coverage by purchasing the 5 year extended warranty cover-
age. Covers 5 years of both parts and labor. Extended coverage can be purchased within 12
months of the end-users purchase date. This extended coverage is applicable to registered
units and end-user proof of purchase must be available upon request.
Available for Generac ®, Guardian ® and Centurion ® products.
Not available for Corepower™ and EcoGen products or all international purchases.
Table 2-1. Accessories (Continued)
Accessory Description

General Information
12 Synergy Automatic Standby Generator Owner’s Manual
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Synergy Automatic Standby Generator Owner’s Manual 13
Section 3 Operation
3.1 — Control Pad
The control pad is intended for use by qualified service personnel only.
See Figure 3-1. The control pad is located under the lid of the enclosure. The lid is secured by two locks, one on each
side of the enclosure. For best results, press down on the lid directly above the side lock, and while holding the lid
down, use key to unlock the latch. Repeat step on opposite side of enclosure. Always unlock both the left and right side
locks before attempting to lift the lid.
NOTE: The lid may appear stuck if pressure is not applied as described. Always verify that the side locks are
unlocked before pulling up on lid.
To remove the front access panel, lift it straight up to disengage side hooks, and then outward away from unit.
When closing the unit, remember to lock both left and right side locks.
Figure 3-1. Control Pad and Side Door Compartment
*
7.5 Amp Fuse
and USB Port
(Under Flap)
Side Lock
Generator Disconnect
Circuit Breaker
Side Door Compartment
LCD Screen
Control Pad

Operation
14 Synergy Automatic Standby Generator Owner’s Manual
With the control pad set to AUTO, the engine may crank and start at any time without warning. Such
automatic starting occurs during the programmed exercise cycle or when utility power source voltage
drops below the configured level. To prevent possible injury that might occur during sudden starts,
always set the control pad to OFF and remove the 7.5 amp fuse before working on or around the gener-
ator or transfer switch. For added security, place a DO NOT OPERATE tag or placard at both the control
pad and transfer switch.
NOTE: Never run the generator with any access panel removed.
Figure 3-2. Control Pad and LCD Screen
3.2 — Auto/Manual/Off
Feature Description
AUTO
Press to activate fully automatic operation. Green LED illuminates to confirm that system is in AUTO mode.
Transfer to standby power occurs if utility power fails.
Exercise timer functionality is enabled, if set.
MANUAL
Press to crank and start engine. Blue LED illuminates to confirm that system is in MANUAL mode.
Transfer to standby power occurs if utility power fails.
Exercise timer functionality is disabled.
OFF
Press to shut down engine, if running. Red LED illuminates to confirm that system is in OFF mode.
Transfer to standby power does not occur if utility power fails.
Exercise timer functionality is disabled.
*
LCD Screen
AUTO
UP ARROW
ENTER
ESCAPE
OFF
MANUAL
DOWN ARROW
Green
LED
Blue
LED
Red
LED