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Installation and
Owner’s Manual
Air-cooled Automatic
Standby Generators
Models:
04758-2 (6 kW NG, 7 kW LP)
04759-2 (12 kW NG, 12 kW LP)
04760-2 (13 kW NG, 15 kW LP)
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GENERAC
POWER SYSTEMS, INC.
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*This manual should remain with the unit.*
Not intended for use as Primary Power in place of utility
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or in life-support applications.
DANGER
DEADLY EXHAUST FUMES. OUTDOOR INSTALLATION ONLY!!
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This symbol points out important safety informa- INTRODUCTION ! tion that, if not followed, could endanger personal Thank you for purchasing this Guardian model by Generac safety and/or property of others. Power Systems Inc.. This model is a compact, high per- formance, air-cooled, engine-driven generator designed to This symbol points out potential explosion hazard. automatically supply electrical power to operate critical loads during a utility power failure. This symbol points out potential f
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Table of Contents Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 3.2.2 “Off” Position....................................14 Introduction ........................Inside Front Cover Read This Manual Thoroughly ........................IFC 3.2.3 “Manual” Position ............................14 Contents ..........................................................IFC 3.3 Automatic Transfer Operation ....................15 Operation and Maintenance ............................IFC 3.4 Sequence of Au
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IMPORTANT SAFETY INSTRUCTIONS Guardian Air-cooled 7 kW, 12 kW and 15 kW 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 operators and potential operators of this equipment. ! ! ! ! WARNING: GENERAL HAZARDS The engine exhaust from this product For safety reasons, Generac recommends that the contains chemicals known to the state of California to cause c
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IMPORTANT SAFETY INSTRUCTIONS Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Keep a fire extinguisher near the generator at all times. Extinguishers rated “ABC” by the National ELECTRICAL HAZARDS Fire Protection Association are appropriate for use on the standby electric system. Keep the extin- All generators covered by this manual produce dangerous electrical voltages and can cause fatal guisher properly charged and be familiar with its use. If there are any questions pertaining to fi
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 1.2 PROTECTION SYSTEMS DANGER Unlike an automobile engine, the generator may have Only qualified electricians or contractors should to run for long periods of time with no operator pres- ! attempt such installations, which must comply ent to monitor engine conditions. For that reason, the strictly with applicable codes, standards and engine is equipped with the following systems that regulations. protect it agai
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 1.4 THE GENERATOR Figure 1.1 – 7 kW, Single Cylinder GH-410 Engine Control Panel Oil Data Dipstick Decal GFCI Outlet Exhaust Enclosure Fuel Regulator Fuel Inlet Battery Oil Filter Compartment Figure 1.2 – 12 kW/15 kW, V-twin GT-990/760 Engine Control Panel Oil Data Dipstick Decal GFCI Outlet Exhaust Enclosure Fuel Regulator Fuel Inlet Composite Base Battery Oil Filter Compartment Generac® Power Systems, Inc. 5
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 1.5 SPECIFICATIONS 1.5.1 GENERATOR Model 04758 Model 04759 Model 04760 Rated Max. Continuous Power Capacity (Watts*) 6,000 NG/7,000 LP 12,000 NG/12,000 LP 13,000 NG/15,000 LP† Rated Voltage 120/240 120/240 120/240 Rated Max. Continuous Load Current (Amps) 120 Volts + 50.0 NG/58.3 LP 100.0 NG/100.0 LP 108.3 NG/125.0 LP 240 Volts 25.0 NG/29.2 LP 50.0 NG/50.0 LP 54.2 NG/62.5 LP Main Line Circuit Breaker 30 Amp 50
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 1.6 FUEL REQUIREMENTS 1.8 RECONFIGURING THE AND RECOMMENDATIONS FUEL SYSTEM With LP gas, use only the vapor withdrawal system. This type of system uses the vapors formed 1.8.1 7 KW, 410CC ◆ above the liquid fuel in the storage tank. To reconfigure the fuel system from NG to LP, The engine has been fitted with a fuel carburetion follow these steps (Figure 1.3): system that meets the specifications of the 1997 N
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Figure 1.4 - Demand Regulator 1.8.2 12KW AND 15KW, 990CC ENGINES ◆ To reconfigure the fuel system from NG to LP, OUTLET PORTS follow these steps: FUEL HOSE NOTE: BRASS HOSE FITTING The primary regulator for the propane supply is IDLE CIRCUIT BRASS HOSE U SMALL PORT T FITTING 1 TAP FUEL JET NOT INCLUDED with the generator. A fuel pres- 1/8 NPT REGULATOR sure of 11 to 14 inches of water column (0.4 to 0.5 HOUSING
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Figure 1.5 – Battery Cable Connections 1.9.2 TRANSFER SWITCH ◆ 1.9.2.1 7 kW, 12 kW and 15 kW Units Transfer switches for use with these generators are sold separately and can be purchased from Generac Authorized Dealers. Install the transfer switch on a firm, sturdy sup- porting structure. To prevent switch distortion, level the switch if nec- essary. This can be done by placing washers between the switch
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Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators • Remove watches, rings or other metal objects; 2.1 BEFORE INITIAL START-UP Use tools with insulated handles; Before starting, complete the following: Wear rubber gloves and boots; 1. Set the generator’s main circuit breaker to its Do not lay tools or metal parts on top of the OFF (or open) position. battery; and Disconnect charging source prior to connecting or dis- 2. Set the ge
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Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 3. Check utility power source voltage across termi- 3. Turn OFF the utility power supply to the transfer nals N1 and the transfer switch neutral lug; then switch, using the means provided (such as a util- across terminal N2 and neutral. Nominal line-to- ity main line circuit breaker). neutral voltage should be 120 volts AC. 4. When certain that utility supply voltage is com- patible with t
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Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 4. Manually set the transfer switch to the UTILITY 4. When full load has been achieved. Connect a fre- position, i.e., load terminals connected to the util- quency meter to the output lugs of the generator’s ity power source side. main line circuit breaker. 5. Turn ON the utility power supply to the transfer 5. The fuel regulator is fitted with one (7 kW), or two switch, using the means pr
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Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators If this procedure or equipment are not available, 2.7.2 12 KW AND 15 KW UNITS ◆ locate the nearest Generac Guardian Dealer and they 1. Loosen governor clamp bolt (See Figure 2.4). can perform the adjustments. NOTE: Figure 2.4 — V-twin Engine Governor Adjustment A service fee may be charged for this adjustment. 2.7 ENGINE GOVERNOR ADJUSTMENT If both AC frequency and voltage are correspondin
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Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 7. Run the unit for one hour at 100 percent load. 2.7.3 ADDITIONAL CORROSION ◆ 8. Turn ON the utility power supply to the transfer PROTECTION switch, which will allow the transfer switch to Periodically spray all engine linkage parts and brack- transfer back to utility power. The unit will con- ets with corrosion inhibiting spray such as WD-40 or tinue to run for one minute and then shut down. a comparable product. 9. Al
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Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators D.Utility Voltage Pickup Sensor 3.3 AUTOMATIC TRANSFER This sensor monitors utility power supply volt- OPERATION age. When that voltage is restored to above 70 To select automatic operation, do the following: percent of the nominal source voltage, a retrans- fer time delay starts timing. 1. Make sure the transfer switch main contacts are set to their “Utility” position, i.e., loads connected E.Retransfer Time Delay t
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Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Figure 3.2 – Manual Transfer Switch Operation 3.6 SETTING THE EXERCISE TIMER The generator is equipped with an exercise timer. Once it is set, the generator will start and exercise once every seven days, on the day of the week and at the time of day the following sequence is completed. During this exercise period, the unit runs for approx- imately 12 minutes and then shuts down. Transfer of loads to the generator output d
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n e s o o L Section 4 — Maintenance Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators The generator panel’s 5 amp fuse protects the battery Figure 3.3 – Low Oil Pressure and charge circuit against overload. If the fuse element has High Temperature Switches melted open, battery charging capability will not be pos- Low Oil Switch High Temp Switch sible. Replace the fuse using only an identical 5 amp replacement. To remove fuse, push cap down and rotate counterclockwise. Figure 4.1 – Generator
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n e s o o L Section 4 — Maintenance Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 4. Install the dipstick. Figure 4.4 – Oil Drain Hose and Filter 5. Reset the AUTO/OFF/MANUAL switch to its origi- nal position. Figure 4.3 — Oil Dipstick and Fill, 12 kW and 15 kW Oil Dipstick Oil Drain Oil Fill Hose Oil Filter 4.4 CHANGING THE OIL FILTER Change the engine oil filter as follows: 1. With the oil drained, remove the old oil filter by turning it counterclockwise. 2. Apply a light coating of cl
