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                        Installation and
Owner’s Manual
7, 10, 13 and 16kW Air-cooled,
Automatic Standby Generators
Models: 005240, 005280 (6 kW NG, 7 kW LP)
 005241, 005281 (9 kW NG, 10 kW LP)
C US
 005242, 005282 (13 kW NG, 13 kW LP)
 005243, 005244, (15 kW NG, 16 kW LP)
LISTED
 005283, 005284
R
GENERAC
POWER SYSTEMS,  INC.
R
Not intended for use as Primary Power in place of utility or in
 
life-support applications.
DANGER
DEADLY EXHAUST FUMES. OUTDOOR INSTALLATION ONLY!                                            
                    
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                        The operator is responsible for proper and safe use  INTRODUCTION of the equipment. The manufacturer strongly recom- Thank you for purchasing this model of the Guardian  mends that the operator read this Owner's Manual  product line by Generac Power Systems Inc. This  and thoroughly understand all instructions before  model is a compact, high performance, air-cooled,  engine-driven generator designed to automatically using this equipment. The manufacturer also strong- supply electrical power to 
                    
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                        Table of Contents Air-cooled Generators Introduction ........................Inside Front Cover Section 3 – Operation ....................................15  Read This Manual Thoroughly ........................ IFC 3.1 Using the AUTO/OFF/MANUAL Switch ........15  Contents ..........................................................IFC 3.2 Automatic Transfer Operation .....................16  Operation and Maintenance ............................ IFC 3.3 Sequence of Automatic Operation ............
                    
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                        IMPORTANT SAFETY INSTRUCTIONS Air-cooled Generators   SAVE THESE INSTRUCTIONS – The manufacturer suggests that these rules for safe operation  be copied and posted near the unit’s installation site. Safety should be stressed to all opera-   tors and potential operators of this equipment. � WARNING:    GENERAL HAZARDS    � The engine exhaust from this product contains chemicals known to the state � For safety reasons, the manufacturer recommends  of California to cause cancer, birth  that t
                    
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                        IMPORTANT SAFETY INSTRUCTIONS Air-cooled Generators � Keep a fire extinguisher near the generator at all   ELECTRICAL HAZARDS  times. Extinguishers rated “ABC” by the National    Fire Protection Association are appropriate for  � All generators covered by this manual produce  use on the standby electric system. Keep the extin- dangerous electrical voltages and can cause fatal  guisher properly charged and be familiar with its  electrical shock. Utility power delivers extremely  use. Consult th
                    
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                        Section 1 — General Information Air-cooled Generators There are LED readouts on the control panel to notify  DANGER personnel that one of these faults has occurred.  There is also a System Set LED that is lit when all   Only qualified electricians or contractors should   of the conditions described in section "System Set   attempt such installations, which must comply  LED" are true. (See the "Protection Systems" section  strictly with applicable codes, standards and regu- for details.) lations
                    
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                        Section 1 — General Information Air-cooled Generators 1.4  THE GENERATOR Figure 1.1 – 7kW, Single Cylinder GH-410 Engine Figure 1.2 – 10kW, V-twin GT-530 Engine Control Control Panel Panel Data Oil Oil Data Air Filter Decal Dipstick Dipstick Decal Cover Exhaust Exhaust Enclosure Air Filter Enclosure Fuel Fuel Inlet Inlet (Back) (Back) Fuel Fuel Regulator Regulator Composite Base Oil Filter Battery Compartment Composite Base Oil Filter Battery Compartment Figure 1.3 – 13kW and 16kW, V-twin GT-990
                    
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                        Section 1 — General Information Air-cooled Generators 1.5  SPECIFICATIONS  1.5.1 GENERATOR  Model 05240 & 05280 05241 & 05281 05242 & 05282 05243 & 05244     05283 & 05284  Rated Max. Continuous  6,000 NG/7,000 LP 9,000 NG/10,000 LP 13,000 NG/13,000 LP 15,000 NG/16,000 LP   Power Capacity (Watts*)  Rated Voltage 120/240 120/240 120/240 120/240  Rated Max. Continuous   Load Current (Amps) 120 Volts** 50.0 NG/58.3 LP 75.0 NG/83.3 LP 108.3 NG/108.3 LP 125 NG/133.3 LP 240 Volts 25.0 NG/29.2 LP 37.5 
                    
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                        Section 1 — General Information Air-cooled Generators Special considerations should be given when install- 1.6 SYSTEM SET LED ing the unit where local conditions include flooding,  The “System Set” LED is lit when all of the following  tornados, hurricanes, earthquakes and unstable  conditions are true: ground for the flexibility and strength of piping and  1. The AUTO/OFF/MANUAL switch is set to the  their connections. AUTO position. Use an approved pipe sealant or joint compound on  2. The uti
                    
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                        Section 1 — General Information Air-cooled Generators NOTE: 1.9  RECONFIGURING THE Use an approved pipe sealant or joint compound  FUEL SYSTEM on all threaded fittings to reduce the possibility  of leakage.  1.9.1 7 KW, 410CC ENGINE 9. Reverse procedure steps 1-6 to reinstall demand  To reconfigure the fuel system from NG to LP, follow  regulator. these steps (Figure 1.4): 10. Take the plastic plug supplied in the poly-bag  NOTE: with the generator and press it into the 3/4” hole  on the bottom 
                    
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                        Section 1 — General Information Air-cooled Generators Figure 1.5 - 10kW, GT-530 (Inlet Hose Slid Back) Figure 1.8 - 13/16kW, GT-990 (Airbox Cover  Removed) Fuel Selection Lever - "Out" Position for Liquid Propane  (Vapor) Fuel Fuel Selection  Lever - "In"  Position for  Natural Gas  Fuel Figure 1.6 - 10kW, GT-530 (Inlet Hose Slid Back) 1.10 LOCATION  1.10.1 GENERATOR Install the generator set, in its protective enclosure,  Fuel Selection  outdoors, where adequate cooling and ventilating air  Lev
                    
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                        Section 1 — General Information Air-cooled Generators � Install the generator as close as possible to the fuel � Install the transfer switch indoors on a firm, sturdy  supporting structure. supply, to reduce the length of piping. � To prevent switch distortion, level the switch if  � Install the generator as close as possible to the  necessary. This can be done by placing washers  transfer switch. REMEMBER THAT LAWS OR  between the switch enclosure and mounting sur- CODES MAY REGULATE THE DISTAN
                    
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                        Section 1 — General Information Air-cooled Generators Figure 1.10 – Battery Cable Connections   Do not open or mutilate the battery. Released   electrolyte has been known to be harmful to the  skin and eyes, and to be toxic.   The electrolyte is a dilute sulfuric acid that is   harmful to the skin and eyes. It is electrically  conductive and corrosive.  The following procedures are to be observed: � Wear full eye protection and protective clothing; �  Where electrolyte contacts the skin, wash 
                    
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                        Section 2 — Post Installation Start-up and Adjustments Air-cooled Generators 2.1 BEFORE INITIAL START-UP DANGER NOTE:   The transfer switch is now electrically “hot.”  These units have been run and tested at the fac-  Contact with “hot” parts will result in extremely  tory prior to being shipped and do not require any  hazardous and possibly fatal electrical shock.  type of break-in. Proceed with caution. Before starting, complete the following: 5. Use an accurate AC voltmeter to check utility 
                    
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                        Section 2 — Post Installation Start-up and Adjustments Air-cooled Generators 2.4 GENERATOR TESTS UNDER LOAD 2.5  CHECKING AUTOMATIC  To test the generator set with electrical loads applied,  OPERATION proceed as follows: To check the system for proper automatic operation,  1. Set generator’s main circuit breaker to its OFF  proceed as follows: (or OPEN) position. 1. Set generator’s main circuit breaker to its OFF  2. Turn OFF all breakers on the load center of the  (or OPEN) position. transfer b
                    
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                        Section 2 — Post Installation Start-up and Adjustments Air-cooled Generators 1. Turn off utility power to the main distribution  panel in the house. This can be done by switching  the service main breaker to the off or open posi-   Do not make any unnecessary adjustments.  tion.  Factory settings are correct for most applica- 2. Allow the generator to start. Before loading the  tions. However, when making adjustments, be  generator, confirm that the No Load Frequency,  careful to avoid overspee
                    
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                        Section 3 — Operation Air-cooled Generators 4. Connect a frequency meter across the generators NOTE: AC output leads. The access panel on top of the control panel must  5. Turn the primary adjust screw to obtain a fre- be removed to adjust the voltage regulator. quency reading of 61.5 Hertz. Turn the secondary  NOTE: adjust screw to obtain a frequency of 62.5 Hz. 6. When frequency is correct at no load, check the  The voltage regulator is housed above the gen- AC voltage reading. If voltage is i
                    
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                        Section 3 — Operation Air-cooled Generators A. Utility Voltage Dropout Sensor  3.1.4 CHOKE OPERATION � This sensor monitors utility source voltage. 1. 990 engines have an electric choke in the air box  � If utility source voltage drops below about 65  that is automatically controlled by the electronic  percent of the nominal supply voltage, the sensor  control board. energizes a 10 second timer. 2. 530 engines have an electric choke on the divider  � Once the timer has expired, the engine will c
                    
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                        Section 3 — Operation Air-cooled Generators 4. Use the manual transfer handle inside the trans- 5. Use the manual transfer handle inside the trans- fer switch to move the main contacts to their fer switch to move the main contacts back to their  STANDBY position, i.e., loads connected to the UTILITY position, i.e., loads connected to the util- standby power source (Figure 3.2). ity power source (Figure 3.2). 5. To crank and start the engine, set the AUTO/OFF/ 6. Turn ON the utility power supply 
                    
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                          n e s o o L           Section 3 — Operation Air-cooled Generators Low speed exercise will be handled as follows:  3.6.3 OVERCRANK 1. The standard start sequence will be initiated. This feature prevents the generator from damaging  2. The unit will run at 2,400 RPM. itself when it continually attempts to start and anoth- er problem, such as no fuel supply, prevents it from  3. If utility is lost during exercise, the controller will  starting. The unit will crank and rest for a preset  do the fo