Generac 37kW NG, 40kW LP Cooling System, Overload Protection for Engine DC Electrical System

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Section 4 — Maintenance

QUIETSOURCE™ 40kW Liquid-cooled Generators

On the day, and at the time of day chosen for the gen- erator to exercise, set the weekly exercise cycle as fol- lows:

1.Place the AUTO/OFF/MANUAL switch in the AUTO position.

2.Press and hold the “Set Exercise” switch for three seconds, then release.

At this time all five red LEDs will flash for approxi- mately 10 seconds, then the engine will start and run for it’s 12 minute exercise period, then shut down. The generator will now start and run each week at the same time.

If DC power to the control board is lost, the weekly exercise setting will be lost. This is indicated by all five red LEDs continually flashing. In this state the gener- ator will still start and run in manual mode, or auto- matically start and run if UTILITY is lost while in AUTO mode, but it will not perform a weekly exercise cycle.

If a failure occurs while running in this mode, the five red LEDs will stop flashing, the individual fault LED will turn on and the engine will shut down. Once the AUTO/OFF/MANUAL switch has been switch to OFF, the individual fault LED will turn OFF and the five red LEDs will begin flashing to show exercise has still not been set.

Figure 3.2 - “Set Exercise” Switch

 

 

S

 

 

 

S

 

FUSE

F

U

F

 

F

U

F

 

 

 

 

U

E

S

FUSE

E

S

4A

 

S

E

 

S

E

 

U

 

15A

 

UF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BAT.MAIN

CHARGER

AUTO

OFF

OFF

ON

SET

MANUAL

EXERCISE

 

TIME

 

4.1MAINTENANCE PERFORMED BY AUTHORIZED SERVICE FACILITIES

A. EVERY THREE MONTHS

1.Check battery state of charge and condition.

2.Inspect and test fuel system.

3.Check transfer switch.

4.Inspect exhaust system.

5.Check engine ignition system.

6.Check fan belts.

B. ONCE EVERY SIX MONTHS

1.Test Engine Safety Devices (low oil pressure, low coolant level, high coolant temperature).

C. ONCE ANNUALLY

1.Test engine governor. Adjust or repair, if needed.

2.Clean, inspect generator.

3.Flush cooling system.

D. FIRST 100 OPERATING HOURS

1.Change engine oil and oil filter. (After initial change, service engine oil and filter at 150 oper- ating hours or 6 months, whichever comes first.)

2.Retorque cylinder head. (See Torque Specs, Section 1.13.)

3.Retorque intake and exhaust manifold. (See Torque Specs, Section 1.13.)

E. EVERY 500 OPERATING HOURS

1.Service air cleaner.

2.Check starter.

3.Check engine DC alternator.

4.2COOLING SYSTEM

Air intake and outlet openings in the generator com- partment must be open and unobstructed for contin- ued proper operation. This includes such obstruc- tions as high grass, weeds, brush, leaves and snow.

Without sufficient cooling and ventilating air flow, the engine/generator quickly overheats, which causes it to shut down. (See Section 6 for installation drawings and vent locations.)

The exhaust system parts from this product get extremely hot and remain 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.

4.3OVERLOAD PROTECTION FOR

ENGINE DC ELECTRICAL SYSTEM

Engine cranking, start up and running are controlled by a solid state Engine Controller circuit board. Battery voltage is delivered to that circuit board via a 15-amp fuse. These overcurrent protection devices will open if the circuit is overloaded.

If a circuit breaker opens or a fuse element

!melts, find the cause of the overload before resetting the circuit breaker or replacing the fuse.

Generac® Power Systems, Inc. 15

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Contents Liquid-cooled, Prepackaged Standby Generators ‹ Operation and Maintenance Authorized Service Dealer Location‹ HOW to Obtain Service IntroductionTable of Contents General Hazards Electrical Hazards Generator Transfer SwitchAutomatic System Operation Generator AC Connection Systems‹ 1.7.2 High Coolant Temperature Switch ‹ 1.7.1 LOW OIL Pressure Switch‹ 1.7.3 LOW Coolant Level Switch Generator Fuel SystemLifting the Generator UnpackingReconfiguring the Fuel System Specifications‹ 1.10.1 Generator Specifications ‹ 1.10.2 Engine SpecificationsBefore Installation Torque SpecificationsEngine OIL Recommendations Coolant RecommendationsGenerator Mounting Support Generator LocationBasic Standby Electric System ‹ 2.1.1 Nfpa StandardsEmergency Circuit Isolation Method Transfer Switch Signal ConnectionsTotal Circuit Isolation Method Generator AC Neutral Connections‹ 2.10.1 Vented Batteries Battery Installation‹ 2.9.2 GTS-TYPE Engineered Transfer Switch Preparation Before START-UP Using AN Engineered GTS Transfer Switch‹ 3.2.2 Fault Indicator LED ‹ 3.2.1 AUTO/OFF/MANUAL Switch‹ 3.2.5 SET Exercise Time Switch Control Console ComponentsRetransfer and Shutdown Manual Transfer START-UP Engine Governor AdjustmentsAutomatic Operation Weekly Exercise CycleOverload Protection for Engine DC Electrical System Cooling SystemChecking Fluid Levels ‹ 4.5.10 Changing Engine OIL ‹ 4.5.11 Changing the Engine AIR Cleaner‹ 4.5.12 Spark Plugs ‹ 4.5.13 Coolant Change‹ 4.6.1 Cleaning the Generator Miscellaneous Maintenance‹ 4.6.2 Battery ‹ 4.6.4 Battery ReplacementService Maintenance Interval Information Scheduled MaintenanceLevel Maintenance Level Problem Cause Correction Troubleshooting PointsInstallation Diagram Electrical Data Electrical Data Electrical Data Electrical Data Carrier Rear Bearing Hold Down Battery Assy WireBoot Battery Cable Battery Post Covwer BlackSee Latch Detail ASSEMBLY,BASE-DOOR Ground Wire Assy GRD Wire 99HSBDuct Intake MID AL Duct Discharge RH ALGenerac Power Systems, Inc Control BOX HSB Assy 2A 12V UL BatteryCover Front Panel HSB Cover TOP Panel HSB ShockGenerac Power Systems, Inc Assembly Resistor Cover Flywheel AccessFlexplate 3.9L HSB SunkPump Radiator Copper Brass Tank Coolant RecoveryVENTURI,3.9L Cryslr HSB 22FAN Radiator Support L/H SideTo Engine Hold Down AIR Cleaner Base AIR Cleaner PlatePlate AIR Cleaner TOP Flange Fuel InletLeads Rotor 390 40KW 1P Direct HSB Rotor 390 30KW 1P Direct HSBSTR-390--40AD HSB 433MM LONG3.9L Chrysler Rear Bearing Carrier 390/DRCTWYE, Pipe 3.9L Chrysler OUTNUT TOP Lock FL M12-1.75 Pipe L/H Exhaust ManifoldQuietsource 40kW Liquid-cooled Generators Quietsource 40kW Liquid-cooled Generators Quietsource 40kW Liquid-cooled Generators This Warranty Shall not Apply to the Following