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Installation and
Owner’s Manual
Air-cooled Automatic
Standby Generators
Models:
04758-1 (6 kW NG, 7 kW LP)
04759-1 (12 kW NG, 12 kW LP)
04760-1 (13 kW NG, 15 kW LP)
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GENERAC
POWER SYSTEMS, INC.
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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 model by Generac safety and/or property of others. Power Systems Inc.. This model is a compact, high performance, air-cooled, engine-driven generator This symbol points out potential explosion hazard. designed to automatically supply electrical power to operate critical loads during a utility power failure. This symbol points out potential fire hazard.
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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 ....................14 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 Oil Check/Fill Data Decal Control Panel Exhaust Enclosure Air Filter Fuel Regulator Fuel Inlet Battery Compartment Oil Filter Figure 1.2 – 12 kW/15 kW, V-twin GT-990 Engine Data Control Decal Panel Oil Dipstick Air Filter Exhaust Enclosure Fuel Regulator Fuel Inlet Battery Compartment Oil Filter 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 3. Disconnect wire #0 and wire #14 from the gas 1.6 FUEL REQUIREMENTS solenoid located on the top of the demand regu- AND RECOMMENDATIONS lator. With LP gas, use only the vapor withdrawal 4. Remove the demand regulator by rotating coun- system. This type of system uses the vapors formed terclockwise. above the liquid fuel in the storage tank. 5. Remove the brass hose fitting from the outlet port of the demand r
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 3. Remove the small hose clamp and hose from the 1.9 LOCATION fuel regulator. It may be necessary to pry the hose 1.9.1 GENERATOR off of the brass fitting using a screw driver to gen- ◆ tly lift up the hose edge. Install the generator set, in its protective enclosure, 4. Remove the brass hose fitting screwed into the outdoors, where adequate cooling and ventilating air fuel regulator. is always available. Consid
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators NOTE: 1.10 BATTERY INSTALLATION Fill the battery with the proper electrolyte fluid if nec- The generator is equipped with a battery trickle essary and have the battery fully charged before charger that is active when the unit is set up for installing it. automatic operation. With the battery installed and utility power source voltage available to the Before installing and connecting the battery, complete transfe
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Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators The following procedures are to be observed: 2.2 CHECK TRANSFER SWITCH Wear full eye protection and protective clothing; OPERATION Where electrolyte contacts the skin, wash it off Refer to Section 3.5, of the owner’s manual for man- immediately with water; ual operation procedures. Where electrolyte contacts the eyes, immediately flush thoroughly with water and seek medical DANGER a
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Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 8. Connect an accurate AC voltmeter and a frequen- 8. Turn ON electrical loads. Apply an electrical load cy meter across transfer switch terminal lugs E1 equal to the full rated wattage/amperage capacity and E2. Voltage should be 242-252 volts; fre- of the installed generator. quency should read about 61-63 Hertz. 9. Connect an accurate AC voltmeter and a frequen- 9. Connect the AC voltmet
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Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Figure 2.2 — Placement of Regulator 2.6 ADJUSTING THE REGULATOR (NATURAL GAS ONLY) Although the generator has been factory set to pro- vide maximum power, it may be necessary in some areas to adjust this setting. Because natural gas has different BTU or power content across the country the engine may not perform as designed. If experiencing engine problems at high or full load conditions follow these steps. It will requir
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Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Figure 2.3 — Engine Governor Adjustment 2.7.3 ADDITIONAL CORROSION ◆ PROTECTION Periodically spray all engine linkage parts and brack- ets with corrosion inhibiting spray such as WD-40 or a comparable product. Idle Spring 2.8 VOLTAGE REGULATOR Governor Shaft ADJUSTMENT (Rotate Clockwise) With the frequency between 62-63.5 Hertz, slowly turn the slotted potentiometer (Figure 2.5) until line voltage reads 244-252 volts. N
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Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 8. Turn ON the utility power supply to the transfer 3.3 AUTOMATIC TRANSFER switch, which will allow the transfer switch to OPERATION transfer back to utility power. The unit will con- To select automatic operation, do the following: tinue to run for one minute and then shut down. 9. Allow the unit to cool. 1. Make sure the transfer switch main contacts are 10. Drain the oil and remove the oil filter. Replace the set to t
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Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators D.Utility Voltage Pickup Sensor Figure 3.2 – Manual Transfer Switch Operation This sensor monitors utility power supply volt- age. When that voltage is restored to above 70 percent of the nominal source voltage, a retrans- fer time delay starts timing. E.Retransfer Time Delay This timer runs for about 15 seconds. At end of a 15-second delay, circuit board action de-energizes the transfer relay in the transfer swit
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n e s o o L Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Figure 3.3 – Low Oil Pressure and 3.6 SETTING THE EXERCISE TIMER High Temperature Switches The generator is equipped with an exercise timer. Once it is set, the generator will start and exercise Low Oil Switch High Temp Switch 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 t
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Section 4 — Maintenance Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Figure 4.2 — Oil Dipstick and Fill, 7 kW 4.1 FUSE The generator panel’s 15 amp fuse (Figure 4.1) protects Oil Dipstick and Fill the DC control circuit against overload. The fuse is wired in series with the battery output lead to the panel. If the fuse element has melted open, the engine cannot crank or start. Replace the fuse using only an identical 15-amp replacement. The generator panel’s 5 amp fuse protects the batte
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n e s o o L Section 4 — Maintenance Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 4.3.2 OIL CHANGE PROCEDURE 4.5 CHANGING THE ENGINE To change the oil, proceed as follows: AIR CLEANER 1. Run the engine until it is thoroughly warmed up 4.5.1 7 KW, 12 KW AND 15 KW then shut OFF the engine. GENERATORS 2. Immediately after the engine shuts OFF, pull the oil drain hose (Figure 4.4) free of its retaining See Figures 1.1 and 1.2, for the location of the air clip. Remove the cap from the hose
