INTRODUCTION Thank you for purchasing this model of the Guardian product line by Generac Power Systems Inc. This model is a compact, high performance, air-cooled, engine-driven generator 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 that is intended exclusively for outdoor installation.
Table of Contents Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Introduction ........................Inside Front Cover 3.2.2 “Off” Position ....................................13 Read This Manual Thoroughly ........................IFC Contents ..........................................................IFC Operation and Maintenance ............................IFC How to Obtain Service ....................................IFC Authorized Dealer Locator Number ....................IFC 3.2.
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 contains chemicals known to the state of California to cause cancer, birth defects or other reproductive harm.
IMPORTANT SAFETY INSTRUCTIONS Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators ELECTRICAL HAZARDS • All generators covered by this manual produce dangerous electrical voltages and 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 running.
Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators DANGER Only qualified electricians or contractors should attempt such installations, which must comply strictly with applicable codes, standards and regulations. 1.1 UNPACKING/INSPECTION After unpacking, carefully inspect the contents for damage. • This standby generator set has been factory supplied with a weather protective enclosure that is intended for outdoor installation only.
Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 1.4 YOUR GENERATOR Generac® Power Systems, Inc.
Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 1.5 SPECIFICATIONS 1.5.1 GENERATOR Rated Max. Continuous Power Capacity (Watts*) Rated Voltage Rated Max.
1.6 FUEL REQUIREMENTS AND RECOMMENDATIONS With LP gas, use only the vapor withdrawal system. This type of system uses the vapors formed above the liquid fuel in the storage tank. The engine has been fitted with a fuel carburetion system that meets the specifications of the 1997 California Air Resources Board for tamper-proof dual fuel systems. The unit will run on natural gas or LP gas, but it has been factory set to run on natural gas.
Section 1 — General Information Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 3. The unit has been factory set to run on NG fuel. To reset the system to run on LP fuel, turn the two adjustment screws 1/2 turn clockwise. Use a large screwdriver to make this adjustment. Be sure to replace the plastic plug in the back of the enclosure once the adjustment has been made. 4. The fuel system will now allow the engine to run on LP fuel.
Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators NOTE: Your generator is equipped with a battery trickle charger that is active when your unit is set up for automatic operation. With the battery installed and utility power source voltage available to the transfer switch, the battery receives a trickle charge while the engine is not running, to prevent self-discharge.
Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 2.2 CHECK TRANSFER SWITCH OPERATION Refer to Section 3.5 (Page 14), of the owner’s manual for manual operation procedures. DANGER Do not attempt manual transfer switch operation until all power voltage supplies to the transfer switch have been positively turned off. Failure to turn off all power voltage supplies will result in extremely hazardous and possibly fatal electrical shock. 2.
Section 2 — Post Installation Start-up and Adjustments Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 8. Turn ON electrical loads. Apply an electrical load equal to the full rated wattage/amperage capacity of the installed generator. 9. Connect an accurate AC frequency meter across terminal lugs E1 and E2. Voltage should be greater than 230 volts; frequency should be greater than 58 Hertz. 10. Let the generator run at full rated load for 20-30 minutes.
Figure 2.2 — Placement of Regulator Figure 2.3 — Engine Governor Adjustment Idle Spring Governor Shaft (Rotate Clockwise) Governor Clamp Bolt 7. Turn utility power to the main distribution panel back on. This can be done by switching the service main breaker to the on or closed position. Allow the generator to shut down. Do not make any unnecessary adjustments. Factory settings are correct for most applications. However, when making adjustments, be careful to avoid overspeeding the engine.
Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 2.7.3 ADDITIONAL CORROSION PROTECTION Periodically spray all engine linkage parts and brackets with corrosion inhibiting spray such as WD-40 or a comparable product. 2.8 VOLTAGE REGULATOR ADJUSTMENT With the frequency between 61-62 Hertz, slowly turn the slotted potentiometer (Figure 2.5) until line voltage reads 244-252 volts. NOTE: You must remove the access panel on top of the control panel to adjust the voltage regulator.
Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators ! 3.3 With the switch set to AUTO, the engine may crank and start at any time without warning. Such automatic starting normally occurs when utility power source voltage drops below a preset level or during the normal exercise cycle. To prevent possible injury that might be caused by such sudden starts, always set the switch to OFF and remove the fuse before working on or around the generator or transfer switch.
Section 3 — Operation Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators DANGER DANGER Do not attempt to activate the transfer switch manually until all power voltage supplies to the switch have been positively turned off. Failure to turn off all power voltage supplies may result in extremely hazardous and possibly fatal electrical shock. 4. Use the manual transfer handle inside the transfer switch to move the main contacts to their “Standby” position, i.e.
3.7 PROTECTION SYSTEMS 3.7.1 LOW OIL PRESSURE SWITCH This switch (Figure 3.3) has normally closed contacts that are held open by engine oil pressure during cranking and operating. Should oil pressure drop below the 8 psi range, switch contacts close, and the engine shuts down. The unit should not be restarted until oil is added, and the Auto/Off/Manual switch must be turned to OFF and then back to AUTO. 3.7.2 HIGH TEMPERATURE SWITCH This switch’s (Figure 3.
Section 4 — Maintenance Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Never operate the engine with the oil level below the “Add” mark on the dipstick. Doing this could damage the engine. 4. Install the dipstick. 5. Reset the Auto/Off/Manual switch to its original position. ! Figure 4.2 — Oil Dipstick and Fill, 7 kW Oil Dipstick and Fill ! Any attempt to crank or start the engine before it has been properly serviced with the recommended oil may result in an engine failure. 4.3.
4.5 CHANGING THE ENGINE AIR CLEANER 4.5.1 7 KW, 12 KW AND 15 KW GENERATORS See Figures 1.2 and 1.3, (Page 5), for the location of your air cleaner. Use the following procedure (Figure 4.6): 1. Turn the two screws counterclockwise to loosen. 2. Remove the cover and air filter. 3. Wipe away dust or debris from inside of the air box and around edges. 4. Install the new air cleaner into the air box. 5. Install the cover. Turn the two cover screws clockwise to tighten. See the “Service Schedule,” Section 4.
Section 4 — Maintenance Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators • • • • Remove watches, rings or other metal objects; Use tools with insulated handles; Wear rubber gloves and boots; Do not lay tools or metal parts on top of the battery; and • Disconnect charging source prior to connecting or disconnecting battery terminals. ! Do not open or mutilate the battery. Released electrolyte has been known to be harmful to the skin and eyes, and to be toxic.
Section 4 — Maintenance Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Figure 4.10 - Valve Clearance Adjustment Jam Nut Pivot Ball Stud Figure 4.9 – Cooling Vent Locations Rocker Arm Valve Stem • Install new valve cover gasket. • Re-attach the valve cover. The exhaust from this product gets extremely hot and remains hot after shutdown. High grass, weeds, brush, leaves, etc. must remain clear of the exhaust. Such materials may ignite and burn from the heat of the exhaust system.
Section 4 — Maintenance Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 4.12 OUT OF SERVICE PROCEDURE 4.12.2 RETURN TO SERVICE 4.12.1 REMOVAL FROM SERVICE To return the unit to service after storage, proceed as follows: If you cannot exercise the generator every seven days, and it is to be out of service longer than 90 days, prepare the generator for storage as follows: 1. Start the engine and let it warm up. 2.
Section 4 — Maintenance Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 4.13 SERVICE SCHEDULE ATTENTION: It is recommended that all service work be performed by your nearest Generac/Guardian Authorized Dealer. SYSTEM/COMPONENT X = Action R = Replace as Necessary * = Notify Dealer if Repair is Needed.
Section 5 — Troubleshooting Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 5.1 TROUBLESHOOTING GUIDE PROBLEM CAUSE The engine will not crank. 1. Fuse blown 1. Replace fuse. 2. Loose, corroded or defective 2. Tighten, clean or replace battery cables as necessary. 3. Defective starter contactor (7 kW) 3. * 4. Defective starter motor 4. * 5. Dead Battery 5. Charge or replace battery. The engine cranks but will not start. 1. Out of fuel 2. Defective fuel solenoid (FS) 3.
Section 6 — Electrical Data Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Wiring Diagram – 12 & 15 kW – Drawing No. 0C7830-B 24 Generac® Power Systems, Inc.
Section 6 — Electrical Data Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Wiring Diagram – 12 & 15 kW – Drawing No. 0C7830-B Generac® Power Systems, Inc.
Section 6 — Electrical Data Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Electrical Schematic – 12 & 15 kW – Drawing No. 0C7836-B 26 Generac® Power Systems, Inc.
Section 6 — Electrical Data Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Electrical Schematic – 12 & 15 kW – Drawing No. 0C7836-B Generac® Power Systems, Inc.
Section 6 — Electrical Data Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Wiring Diagram – 7 kW – Drawing No.
Generac® Power Systems, Inc.
Section 6 — Electrical Data Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Electrical Schematic – 7 kW – Drawing No.
Section 6 — Electrical Data Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Electrical Schematic – 7 kW – Drawing No.
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Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Enclosure – Drawing No. 0D3416-K ITEM 1 PART NO. QTY.
41 17 8,9 24 40 27 10 8,32 22 38 43 16 6 23 7 37 23 38 27 45 16 29 28 33 44 31 12 4 2 1 42 23 29 28 20 16 31 4 21 17 15 35 14 30 39 17 36 29 28 3 19 14 15 25 31 17 11 13 35 23 16 21 34 15 14 5 34 Generac® Power Systems, Inc.
Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Control Panel – Drawing No. 0D3418-D ITEM PART NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 QTY.
31 37 7 9 17 18 6 36 22 16 23 30 9 27 15 13 1 19 25 22 40 12 16 21 23 26 14 38 33 32 8 34 35 34 36 Generac® Power Systems, Inc.
Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 7 kW GTS Load Center Assembly – Drawing No. 0D3997-C ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 PART NO.
12 31 37 7 9 17 18 6 36 22 16 23 30 9 27 15 13 1 19 25 22 40 42 16 21 23 26 14 38 41 8 33 35 32 34 34 38 Generac® Power Systems, Inc.
Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 12 kW and 15 kW GTS Load Center Assembly – Drawing No. 0D3996-B ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 PART NO.
65 2, 5, 19, 20, 39, 40, 47, 63, 92, 141 66 8, 11, 12, 13 67 4, 5, 6 68 16, 17, 18 69 48, 49, 50, 51, 52, 53, 54, 55, 56, 58, 59, 61 70 7, 48, 49, 50, 51, 52, 53, 54, 55, 56, 58, 59 71 27, 28, 29 72 3, 32, 33, 34, 35, 36, 40, 71 34 37 36 35 3 38 39 34 22 40 33 32 3 41 9 21 12 31 42 10 13 29 28 25 27 3 11 30 26 44 43 24 16 23 14 15 8 18 17 53 45 54 55 56 46 7 20 19 47 48 49 6 61 50 62 51 3 63 52 1 64 57 58 59 40 Generac® Power Systems, Inc.
Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators GT-990/760 Engine – Drawing No. 0D3415-A Part 1 ITEM PART NO. QTY.
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Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators GT-990/760 Engine – Drawing No. 0D3415-A Part 2 ITEM PART NO. QTY.
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Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 7 kW Generator – Drawing No. 0D3504-B ITEM PART NO. QTY.
Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 12 kW and 15 kW Generator – Drawing No. 0D3417-A 36 6 36 34 40 35 29 7 1 37 28 2 39 3 29 26 21 8 4 38 24 22 32 30 20 12 32 31 28 23 11 17 10 17 38 31 19 10 14 5 18 25 9 28 10 15 16 27 19 32 33 24 13 28 31 32 46 Generac® Power Systems, Inc.
Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 12 kW and 15 kW Generator – Drawing No. 0D3417-A ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 PART NO. QTY.
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Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators GN410 Engine – Drawing No. 0D3539-B Part 1 ITEM PART NO. QTY.
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Section 7 — Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators GN410 Engine – Drawing No. 0D3539-B Part 2 ITEM PART NO. QTY. 1 0C1069 5 2 3 4 5 6 0D2922 0C8435 0C9997 088434 045756 1 1 1 1 11 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 088433B 0C3794 021544 040976 022129 0C2458A 083512 0D1401 091039 0C9619 049811 022097 040945 086999 0D5667A 049821 1 1 1 2 2 1 1 1 1 1 2 4 2 1 1 2 DESCRIPTION SCREW, TAPTITE M6-1.
8 7 2 6 21 5 10 4 20 3 25 24 23 10 1 22 19 28 16 26 29 18 15 14 12 11 28 28 17 19 13 23 27 12 22 26 15 14 11 25 29 18 20 16 17 28 24 13 9 21 ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 PART NO. QTY.
Section 8 — Notes Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators Generac® Power Systems, Inc.
Section 8 — Notes Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators 54 Generac® Power Systems, Inc.
CBHOM-F CBHOM-F CBHOM-F CBHOM-F CBHOM-F TYPE HOM 120/240v TYPE HOM 120/240v TYPE HOM 120/240v TYPE HOM 120/240v TYPE HOM 120/240v M6PEM-T M6PEM-T LEFT SIDE VIEW 622 [24.5"] 604 [23.5"] 76.2mm [3.00"] PEA GRAVEL MINUMUM 704 [27.7"] 207 [8.14"] TRANSFER SWITCH M6PEM-T CBHOM-F TYPE HOM 120/240v 716 [28"] 743 [29.
Section 10 – Warranty Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators NOTE: This Emission Control Warranty Statement pertains to this product only IF the generator size is 15 kW or below. CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT YOUR WARRANTY RIGHTS AND OBLIGATIONS The California Air Resources Board (CARB) and Generac Power Systems, Inc. (Generac) are pleased to explain the Emission Control System Warranty on your new engine.
Section 10 – Warranty Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators EMISSION CONTROL SYSTEM WARRANTY Emission Control System Warranty (ECS Warranty) for 1995 and later model year engines: (a) Applicability: This warranty shall apply to 1995 and later model year engines. The ECS Warranty Period shall begin on the date the new engine or equipment is purchased by/delivered to its original, end-use purchaser/owner and shall continue for 24 consecutive months thereafter.
Section 10 – Warranty Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators GENERAC POWER SYSTEMS "TWO YEAR" STANDARD WARRANTY FOR GUARDIAN® "PREPACKAGED EMERGENCY AUTOMATIC STANDBY GENERATORS" For a period of two years or 2000 hours of operation from the date of original sale, whichever occurs first, Generac Power Systems, Inc.
