Page 2 - INTRODUCTION; READ THIS MANUAL THOROUGHLY; This symbol points out potential explosion hazard.; and thoroughly; CONTENTS; Engine; OPERATION AND MAINTENANCE; DANGER; AUTHORIZED
Generac ® Power Systems, Inc. INTRODUCTION Thank you for purchasing this model of theCenturion product line by Generac Power SystemsInc. This model is a compact, high performance, air-cooled, engine-driven generator designed to automat-ically supply electrical power to operate critical loadsduring a...
Page 3 - Table of Contents; Section 2 – Post Installation Start-up
Table of Contents Air-cooled 8.5 kW Generator Generac ® Power Systems, Inc. 1 Introduction ........................Inside Front Cover Read This Manual Thoroughly ........................IFCContents ..........................................................IFCOperation and Maintenance ..................
Page 4 - Owner’s Manual; GENERAL HAZARDS
2 Generac ® Power Systems, Inc. Study these SAFETY RULES carefully beforeinstalling, operating or servicing this equipment.Become familiar with this Owner’s Manual and with the unit. The generator can operate safely, efficientlyand reliably only if it is properly installed, operatedand maintained. M...
Page 5 - ELECTRICAL HAZARDS; STANDARDS INDEX; IMPORTANT SAFETY INSTRUCTIONS
Generac ® Power Systems, Inc. 3 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 opera...
Page 6 - Section 1 — General Information; outdoor installation only; PROTECTION SYSTEMS
Section 1 — General Information Air-cooled 8.5 kW Generator Only qualified electricians or contractors shouldattempt such installations, which must comply strictlywith applicable codes, standards and regulations. 1.1 UNPACKING/INSPECTION After unpacking, carefully inspect the contents for damage. • ...
Page 7 - GENERATOR; Air Filter
Generac ® Power Systems, Inc. 5 Section 1 — General Information Air-cooled 8.5 kW Generator 1.4 YOUR GENERATOR ControlPanel Air Filter ExhaustEnclosure 12 Volt Battery Fuel Regulator Oil Filter Oil Dipstick DataDecal Figure 1.1 – 8.5 kW, V-Twin GT-990 Engine
Page 9 - FUEL CONSUMPTION; Figure 1.2 – Demand Regulator
Generac ® Power Systems, Inc. 7 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...
Page 10 - Figure 1.5 – Battery Cable Connections
1.9 LOCATION 1.9.1 GENERATOR Install the generator set, in its protective enclosure,outdoors, where adequate cooling and ventilating airis always available. Consider these factors:• Install the unit where air inlet and outlet openings will not become obstructed by leaves, grass, snow,etc. If prevail...
Page 11 - • Disconnect charging source prior to connecting or dis-; BEFORE INITIAL START-UP; Section 2 — Post Installation Start-up and Adjustments
Generac ® Power Systems, Inc. 9 amps for 8.5 kW at -17.8º C (0º F) minimum. Whenusing a maintenance-free battery, it is not necessaryto check the specific gravity or electrolyte level. Havethese procedures performed at the intervals specifiedin the “Service Schedule.” A negative ground systemis used...
Page 12 - GENERATOR TESTS UNDER LOAD
10 Generac ® Power Systems, Inc. 2. Turn OFF all loads connected to the transfer switch terminals T1 and T2. 3. Turn on the utility power supply to the transfer switch using the means provided (such as a utili-ty main line circuit breaker). The transfer switch is now electrically “hot.”Contact with ...
Page 13 - Figure 2.1 — Dual Fuel Regulators; Unit
Generac ® Power Systems, Inc. 11 15. Set the Auto/Off/Manual switch to OFF. The engine should shut down. 2.5 CHECKING AUTOMATIC OPERATION To check the system for proper automatic operation,proceed as follows:1. Check that the Auto/Off/Manual switch is set to OFF. 2. Turn OFF the utility power supply...
Page 14 - A service fee may be charged for this adjustment.; ENGINE GOVERNOR ADJUSTMENT; Figure 2.4 — Full Load Speed Adjust Screw
12 Generac ® Power Systems, Inc. Do not make any unnecessary adjustments.Factory settings are correct for most applica-tions. However, when making adjustments, becareful to avoid overspeeding the engine. If this procedure or equipment are not available toyou, locate the Generac Dealer nearest you an...
Page 15 - Section 3 — Operation; Figure 3.1 – Generator Control Panel
Generac ® Power Systems, Inc. 13 Section 3 — Operation Air-cooled 8.5 kW Generator 3.1 BREAK-IN PROCEDURE Once the unit has been installed and all electricalchecks have been made, it is strongly recommendedthat the following “Break-in Procedure” be completedto ensure correct generator operation in t...
Page 16 - MANUAL TRANSFER OPERATION; POWER SOURCE; Figure 3.2 – Manual Transfer Switch Operation
14 Generac ® Power Systems, Inc. Section 3 — Operation Air-cooled 8.5 kW Generator 3.4 SEQUENCE OF AUTOMATIC OPERATION The generator’s control panel houses a control logic circuit board. This board constantly monitors utility power source voltage. Should that voltage drop below a preset level, circu...
Page 17 - SETTING THE EXERCISE TIMER; LOW OIL PRESSURE SWITCH; Figure 3.3 – Low Oil Pressure and
Generac ® Power Systems, Inc. 15 3.5.2 TRANSFER BACK TO UTILITY POWERSOURCE When utility power has been restored, you will wantto transfer back to that source and shut down thegenerator. This can be accomplished as follows:1. Set the generator’s main circuit breaker to its OFF (or open) position. 2....
Page 18 - OVERCRANK; Approximately 90 seconds total; OVERSPEED; FUSE; Figure 4.1 – Generator Control Panel; Remove the dipstick and wipe it dry with a; Section 4 — Maintenance
16 Generac ® Power Systems, Inc. 3.7.3 OVERCRANK This feature prevents the generator from damagingitself when it continually attempts to start and anoth-er problem, such as no fuel supply, prevents it fromstarting. The unit will crank and rest for a preset timelimit. Then, it will stop cranking, and...
Page 19 - CHANGING THE ENGINE OIL; Figure 4.3 – Oil Drain Hose and Filter; CHANGING THE OIL FILTER
Generac ® Power Systems, Inc. 17 4.3 CHANGING THE ENGINE OIL 4.3.1 ENGINE OIL RECOMMENDATIONS Use oil of American Petroleum Institute (API) ServiceClass SG, SH or SJ. Use all season SAE 5W-30Synthetic oil. Organic break-in oil is required beforeusing synthetic oil. NOTE: The unit is supplied with “b...
Page 20 - Air Cleaner; Check the spark plug gap using a wire feeler; Figure 4.5 – Setting the Spark Plug Gap; BATTERY MAINTENANCE; and corrosion. Tighten and clean as necessary.; Cover; SET PLUG GAP AT 0.50 mm
18 Generac ® Power Systems, Inc. Figure 4.4 — 12 kW and 15 kW Engine Air Cleaner 4.6 SPARK PLUG(S) Reset the spark plug(s) gap or replace the sparkplug(s) as necessary. See Section 4.11 (Page 19) formaintenance requirements.1. Clean the area around the base of the spark plug(s) to keep dirt and debr...
Page 21 - ADJUSTING VALVE CLEARANCE; If you feel uncomfortable about doing this; COOLING SYSTEM; Figure 4.7 – Cooling Vent Locations
Generac ® Power Systems, Inc. 19 Lead-acid batteries present a risk of firebecause they generate hydrogen gas. The following procedures are to be followed: • DO NOT SMOKE when near the battery;• DO NOT cause flame or spark in battery area; and• Discharge static electricity from your body before touc...
Page 22 - ATTENTION AFTER SUBMERSION; MUST NOT; OUT OF SERVICE PROCEDURE
20 Generac ® Power Systems, Inc. The maximum ambient temperature for your generator is 48.9° C (104° F). 4.10 ATTENTION AFTER SUBMERSION If the generator has been submerged in water, it MUST NOT be started and operated. Following any submersion in water, have a Generac AuthorizedDealer thoroughly cl...
Page 23 - SERVICE SCHEDULE; ATTENTION: It is recommended that all service work
Generac ® Power Systems, Inc. 21 Section 4 — Maintenance Air-cooled 8.5 kW Generator 4.13 SERVICE SCHEDULE ATTENTION: It is recommended that all service work be performed by your nearest Generac Authorized Dealer. SYSTEM/COMPONENT PROCEDURE FREQUENCY X = Action Inspect Change Clean W = Weekly R = Re...
Page 24 - Section 5 — Troubleshooting; GUIDE; PROBLEM; *Contact your nearest Generac Authorized Dealer for assistance.
22 Generac ® Power Systems, Inc. Section 5 — Troubleshooting Air-cooled 8.5 kW Generator 5.1 TROUBLESHOOTING GUIDE PROBLEM CAUSE CORRECTION 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...
Page 25 - Section 6 — Mounting Dimensions
Generac ® Power Systems, Inc. 23 Section 6 — Mounting Dimensions Air-cooled 8.5 kW Generator Drawing No. 0D3739-A TYPE HOM TYPE HOM 120/240v 120/240v CBHOM-F CBHOM-F TYPE HOM TYPE HOM CBHOM-F CBHOM-F 120/240v 120/240v TYPE HOM TYPE HOM 120/240v 120/240v CBHOM-F CBHOM-F TYPE HOM TYPE HOM 120/240v 120...
Page 26 - Section 7 — Electrical Data
BATTERY CUSTOMER SUPPLIED 12V HTO BLACK 86 LOP 85 IM2 1 - 20 Vac Sense Transformer L.E.D - ALARM INDICATORS 3 - 50 Hz Operation 2 - Remote Not Auto 4 - SPARE 86 RED SM IC PRINTED CIRCUIT BOARD ON - INDICATES 3 2 1 ON DSW 4 CONTROL J2 J1 85 56 1 2 4 3 5 18 351 86 14 ENGINE WIRING ICT - INTERCONNECTIO...
Page 29 - Electrical Schematic - Drawing No. 0D8501
2 1 5 3 4 J2 2 1 3 2 1 8 14 16 17 15 11 13 12 10 9 J1 7 5 6 34 2 1 15 224 225 0 224A 239 IM2 15A 15 18 SP2 240V IM1 0 15 194 13 17 17 15 23 15 239 SW1 194 15A N1 N2 22 11 23 11 22 11 SP1 44 POWER WINDING 120V 120V 33 NEUTRAL N2 N1 23 CUSTOMER CONNECTIONS 194 0 17 66A 0 SC FS 16 14 BATTERY CUSTOMERSU...
Page 30 - Section 8 — Exploded Views and Parts Lists
28 Generac ® Power Systems, Inc. A A 51 23 36 24 37 49 35 26 47 46 49 2 43 49 43 32 33 50 7 51 4 35 25 51 15 51 48 21 1 67 62 70 59 13 49 42 39 10 3 59 25 35 14 47 54 9 8 27 35 22 51 49 50 51 49 49 11 50 16 17 51 5 47 19 12 6 31 44 47 30 29 28 18 86 41 40 55 57 56 58 52 49 20 52 72 64 65 66 45 71 69...
Page 31 - ITEM
Generac ® Power Systems, Inc. 29 ITEM PART NO. QTY. DESCRIPTION 1 0D8312 1 ASSEMBLY, ENCLOSURE BASE 2 0C6735 2 SUPPORT, ROOF FOLDING 3 0C7061 1 ENCLOSURE, FRONT 4 0C7062 1 ENCLOSURE, EXHAUST SIDE 5 0C7063 1 ENCLOSURE, SIDE & BACK 6 0C7064 1 ENCLOSURE, ROOF 7 0D8333 1 PANEL, ALTERNATOR DIVIDER 8 ...
Page 39 - Control Panel Assembly – Drawing No. 0D8503-B
Generac ® Power Systems, Inc. 37 ITEM PART NO. QTY. DESCRIPTION 1 0A9947E 1 CIRCUIT BREAKER 30 X 2 240V SQDQOU230 (7KW) 0A9947G 1 CIRCUIT BREAKER 40 X 2 240V SQDQOU240 (8.5KW) 0A9947F 1 CIRCUIT BREAKER 50 X 2 240V SQDQOU250 (12KW) 0A9947C 1 CIRCUIT BREAKER 60 X 2 240V SQDQOU260 (13KW) 2 0A18010SRV 1...
Page 41 - ENGINE ONLY
Generac ® Power Systems, Inc. 39 ITEM PART NO. QTY. DESCRIPTION 1 0D5694 1 CASTING, TWIN REGULATOR HOUSING 2 0C5765 1 SOLENOID, TWIN REGULATOR 3 0C4647 1 GASKET , SOLENOID 4 0C4680 1 PLUNGER, LP REGULATOR ASSEMBLY 5 0C6070 1 SPRING-SOLENOID, PLUNGER 6 022985 4 WASHER, FLAT #6 7 022264 4 WASHER, LOCK...
Page 42 - CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT; YOUR WARRANTY RIGHTS AND OBLIGATIONS; only; Section 9 – Warranty
40 Generac ® Power Systems, Inc. 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 EmissionControl System Warranty on your new engine. * In California, new...
Page 43 - EMISSION CONTROL SYSTEM WARRANTY; EMISSION RELATED PARTS INCLUDE THE FOLLOWING:
Generac ® Power Systems, Inc. 41 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 o...
Page 44 - WARRANTY SCHEDULE; THIS WARRANTY SHALL NOT APPLY TO THE FOLLOWING:; GENERAC
GENERAC POWER SYSTEMS "TWO YEAR" STANDARD WARRANTY FOR ® "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 PowerSystems, Inc. (Generac) will, at its option, repair ...
