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Installation and
Owner’s Manual
Air-cooled, Prepackaged
Automatic Standby Generators
Models:
04389-2 (6 kW NG, 7 kW LP)
04456-2 (12 kW NG, 12 kW LP)
04390-2 (13 kW NG, 15 kW LP)
R
GENERAC
POWER SYSTEMS, INC.
R
*This manual should remain with the unit.
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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This symbol points out potential fire hazard. INTRODUCTION Thank you for purchasing this model of the Guardian product line by Generac Power Systems, Inc.. This This symbol points out potential electrical shock model is a compact, high performance, air-cooled, hazard. engine-driven generator designed to automatically The operator is responsible for proper and safe use supply electrical power to operate critical loads dur- of the equipment. Generac strongly recommends that ing a utility power fa
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Table of Contents Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Introduction ........................Inside Front Cover Section 3 – Operation ....................................14 Read This Manual Thoroughly ........................IFC 3.1 Break-in Procedure......................................14 Contents ..........................................................IFC 3.2 Using the Auto/Off/Manual Switch ..............14 Operation and Maintenance ............................IFC 3.3 Automa
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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. Consult the local fire department with any
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators There are LED readouts on the control panel to noti- DANGER fy 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 describe in Section 1.3 are true. ! attempt such installations, which must comply strictly with applicable codes, standards and regulations. 1.3 NEC REQUIREMENT FOR ARC FAULT CIRCUI
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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 and 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 ® 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 04389-2 Model 04456-2 Model 04390-2 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 A
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 1.6 SYSTEM SET LED DANGER The “System Set” LED is lit when all of the following Gaseous fuels such as natural gas and liquid conditions are true: propane (LP) gas are highly explosive. Even the 1. The AUTO/OFF/MANUAL switch is set to the slightest spark can ignite such fuels and cause AUTO position. an explosion. No leakage of fuel is permitted. 2. The utility voltage being supplied to the unit is Natural gas, w
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators NOTE: 14. It may be necessary to make minor adjustments to the preset adjustment screw settings to achieve The natural gas adjustment screw is preset during maximum power. If experiencing problems with installation and should not need any further the unit producing maximum power, follow the adjustment. procedure in Section 2.6 (Adjusting the Fuel Regulator). 1.9.2 12KW AND 15KW, 990CC ENGINES ◆ To reconfigure th
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Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Install the transfer switch indoors on a firm, stur- 5. Connect the black battery cable (from frame dy supporting structure. ground) to the battery post indicated by a nega- tive, NEG or (—). To prevent switch distortion, level the switch if nec- essary. This can be done by placing washers NOTE: between the switch enclosure and mounting sur- Damage will result if battery connections are made face. in reverse
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Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 5. Check the engine crankcase oil level and, if nec- essary, fill to the dipstick FULL mark with the recommended oil. Do not fill above the FULL Do not open or mutilate the battery. Released mark. ! electrolyte has been known to be harmful to 6. Check the fuel supply. Gaseous fuel lines must the skin and eyes, and to be toxic. have been properly purged and leak tested in The electrolyte is
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Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 7. When certain that utility supply voltage is com- patible with transfer switch and load circuit rat- ings, turn OFF the utility power supply to the Do not attempt manual transfer switch opera- transfer switch. tion until all power voltage supplies to the 8. On the generator panel, set the AUTO/OFF/ transfer switch have been positively turned off. MANUAL switch to MANUAL. The engine shoul
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Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 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 provided (such as a util- (12 & 15 kW) adjustment screws. While watching ity main line circuit breaker). the frequency meter, slowly turn the adjustment screws clockwise or counterclockwise one at a 6. Set the AUTO/OFF/MANUAL switch to AUTO. The time until the
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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 the equipment are not available, Figure 2.4 — Full Load Speed Adjust Screw locate the nearest Generac Guardian Dealer and they can perform the adjustments. Full Load Speed Adjust Screw NOTE: A service fee may be charged for this adjustment. 2.7 ENGINE GOVERNOR ADJUSTMENT If both AC frequency and voltage are correspondingly high or low, adjust the engine governor as fol
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Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators NOTE: 3.2 USING THE AUTO/OFF/MANUAL The access panel on top of the control panel must SWITCH (FIGURE 3.1) be removed to adjust the voltage regulator. NOTE: 3.2.1 “AUTO” POSITION The voltage regulator is housed above the genera- Selecting this switch position activates fully automat- tor's control panel. The regulator maintains a volt- ic system operation. It also allows personnel to start age in direct proportion to fre
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Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 3. Set the generator’s AUTO/OFF/MANUAL switch to F. Engine Cool-down Timer AUTO. When the load is transferred back to utility power source, the engine cool-down timer starts timing. 4. Set the generator’s main circuit breaker to its ON (or closed) position. The timer will run for about one minute, and the generator will then shut down. With the preceding steps complete, the generator will start automatically when util
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n e s o o L Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators NOTE: 3.5.2 TRANSFER BACK TO UTILITY POWER The exerciser will only work in the AUTO mode SOURCE and will not work unless this procedure When utility power has been restored, transfer back is performed. The exerciser will need to be reset to that source and shut down the generator. This can every time the 12-volt battery is disconnected and be accomplished as follows: then reconnected. The exerciser WILL NOT
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Section 4 — Maintenance Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators NOTE: 1. Start the generator by moving the AUTO/OFF/ MANUAL switch to the MANUAL position. Allow it If the fault is not repaired, the overcrank feature to run for a short while and then shut it down by will continue to activate. moving the switch to the OFF position. 2. Remove the dipstick and wipe it dry with a 3.7.3.1 Approximate Crank Cycle Times clean cloth. 15 seconds ON 3. Install the dipstick; then, remove i
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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 CHANGING THE ENGINE OIL 4.4 CHANGING THE OIL FILTER Change the engine oil filter as follows: 4.3.1 ENGINE OIL RECOMMENDATIONS 1. With the oil drained, remove the old oil filter by Use oil of American Petroleum Institute (API) Service turning it counterclockwise. Class SG, SH or SJ. Use all season SAE 5W-30 2. Apply a light coating of clean engine oil to the gas- Synthetic oil. Organic break-in oil is re
