Guardian Technologies 04758-2 Generator Tests Under Load, Checking Automatic Operation, Danger

Page 13
2.4GENERATOR TESTS UNDER LOAD

Section 2 — Post Installation Start-up and Adjustments

Air-cooled 7 kW, 12 kW and 15 kW Generators

3.Check utility power source voltage across termi- nals N1 and the transfer switch neutral lug; then across terminal N2 and neutral. Nominal line-to- neutral voltage should be 120 volts AC.

4.When certain that utility supply voltage is compat- ible with transfer switch and load circuit ratings, turn OFF the utility power supply to the transfer switch.

5.Set the generator's main circuit breaker to its OFF (or open) position. Initial tests will be con- ducted at no-load condition.

6.On the generator panel, set the AUTO/OFF/ MANUAL switch to MANUAL. The engine should crank and start.

7.Let the engine warm up for about five minutes to allow internal temperatures to stabilize. Then, set the generator’s main circuit breaker to its ON (or closed) position.

2.5CHECKING AUTOMATICManual background DANGER

Proceed with caution! Generator power voltage is now supplied to the transfer switch. Contact with live transfer switch parts will result in dan- gerous and possibly fatal electrical shock.

8.Connect an accurate AC voltmeter and a fre- quency meter across transfer switch terminal lugs E1 and E2. Voltage should be 242-252 volts; frequency should read about 61-63 Hertz.

9.Connect the AC voltmeter test leads across ter- minal lug E1 and neutral; then across E2 and neutral. In both cases, voltage reading should be 121-126 volts AC.

10.Set the generator’s main circuit breaker to its OFF (or open) position. Let the engine run at no- load for a few minutes to stabilize internal engine generator temperatures.

11.Set the generator's AUTO/OFF/MANUAL switch to OFF. The engine should shut down.

NOTE:

It is important not to proceed until certain that generator AC voltage and frequency are correct and within the stated limits. Generally, if both AC frequency and voltage are high or low, the engine governor requires adjustment. If frequency is cor- rect, but voltage is high or low, the generator’s voltage regulator requires adjustment.

2.4GENERATOR TESTS UNDER LOAD

To test the generator set with electrical loads applied, proceed as follows:

1.Set generator’s main circuit breaker to its OFF (or open) position.

2.Set the generator's AUTO/OFF/MANUAL switch to OFF.

3.Turn OFF the utility power supply to the transfer switch, using the means provided (such as a util- ity main line circuit breaker).

Do not attempt manual transfer switch opera- tion 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.

4.Manually set the transfer switch to the STANDBY position, i.e., load terminals connected to the generator's E1/E2 terminals. The transfer switch operating lever should be down.

5.Set the generator's AUTO/OFF/MANUAL switch to MANUAL. The engine should crank and start immediately.

6.Let the engine stabilize and warm up for a few minutes.

7.Set the generator’s main circuit breaker to its ON (or closed) position. Loads are now powered by the standby generator.

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 voltmeter and a frequen- cy 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. Listen for unusual noises, vibration or other indications of abnormal operation. Check for oil leaks, evidence of overheating, etc.

11.When testing under load is complete, turn OFF electrical loads.

12.Set the generator's main circuit breakers to their OFF (or open) positions.

13.Let the engine run at no-load for a few minutes.

14.Set the AUTO/OFF/MANUAL switch to OFF. The engine should shut down.

2.5CHECKING AUTOMATIC

OPERATION

To check the system for proper automatic operation, proceed as follows:

1.Set the generator’s main circuit breaker to it’s OFF (or open) position.

2.Check that the AUTO/OFF/MANUAL switch is set to OFF.

3.Turn OFF the utility power supply to the transfer switch using the means provided (such as a utility main line circuit breaker).

11

Page 12 Page 14
Image 13
Page 12 Page 14
Contents 04760-2 13 kW NG, 15 kW LP Models 04758-2 6 kW NG, 7 kW LP 04759-2 12 kW NG, 12 kW LPThis manual should remain with the unit  Not intended for use as Primary Power in place of utility ‹ OPERATION AND MAINTENANCE ‹ CONTENTS‹ HOW TO OBTAIN SERVICE INTRODUCTIONand Adjustments Section 2 - Post Installation Start-upSection 4 - Maintenance Section 5 - TroubleshootingIMPORTANT SAFETY INSTRUCTIONS  GENERAL HAZARDS  WARNING  This product contains or emits chemicals FIRE HAZARDS   ELECTRICAL HAZARDS  EXPLOSION HAZARDS  ‹ STANDARDS INDEX1.2 PROTECTION SYSTEMS 1.1 UNPACKING/INSPECTION1.3 SYSTEM SET LED DANGERFigure 1.1 - 7 kW, Single Cylinder GH-410 Engine 1.4 THE GENERATORFigure 1.2 - 12 kW/15 kW, V-twin GT-990/760 Engine ‹ 1.5.1 GENERATOR 1.5 SPECIFICATIONS‹ 1.5.2 ENGINE 1.6 FUEL REQUIREMENTS AND RECOMMENDATIONS 1.8 RECONFIGURING THE FUEL SYSTEM1.7 FUEL CONSUMPTION DANGER‹ 1.8.2 12KW AND 15KW, 990CC ENGINES 1.9 LOCATION‹ 1.9.1 GENERATOR Figure 1.4 - Demand Regulator1.11 THE BATTERY 1.10 BATTERY INSTALLATION‹ 1.9.2 TRANSFER SWITCH 1.9.2.1 7 kW, 12 kW and 15 kW Units Figure 1.5 - Battery Cable Connections2.1 BEFORE INITIAL START-UP 2.2 CHECK TRANSFER SWITCH OPERATION2.3 ELECTRICAL CHECKS Section 2 - Post Installation Start-up and Adjustments2.5 CHECKING AUTOMATIC OPERATION 2.4 GENERATOR TESTS UNDER LOADFigure 2.2 - Placement of Regulator 2.6 ADJUSTING THE REGULATOR NATURAL GAS ONLYFigure 2.1 - Dual Fuel Regulators Figure 2.3 - Single Cylinder Engine Governor Adjustment 2.7 ENGINE GOVERNOR ADJUSTMENTFigure 2.4 - V-twin Engine Governor Adjustment Figure 2.5 - V-twin Full Load Speed Adjust Screw3.1 BREAK-IN PROCEDURE 2.8 VOLTAGE REGULATOR ADJUSTMENTFigure 2.6 - Voltage Adjustment Potentiometer ‹ 3.2.1 “AUTO” POSITION3.4 SEQUENCE OF AUTOMATIC OPERATION 3.3 AUTOMATIC TRANSFER OPERATION3.5 MANUAL TRANSFER OPERATION ‹ 3.5.1 TRANSFER TO GENERATOR POWER SOURCE‹ 3.5.2 TRANSFER BACK TO UTILITY POWER SOURCE 3.6 SETTING THE EXERCISE TIMER‹ 3.7.1 LOW OIL PRESSURE SWITCH Figure 3.2 - Manual Transfer Switch OperationFigure 3.3 - Low Oil Pressure and High Temperature Switches ‹ 3.7.2 HIGH TEMPERATURE SWITCH4.1 FUSE 4.2 CHECKING THE ENGINE OIL LEVEL‹ 4.3.2 OIL CHANGE PROCEDURE 4.5 CHANGING THE ENGINE AIR CLEANER4.3 CHANGING THE ENGINE OIL 4.4 CHANGING THE OIL FILTERFigure 4.6 - 7 kW, Engine Air Cleaner Location 4.7 BATTERY MAINTENANCEFigure 4.7 - 12 kW and 15 kW Engine Air Cleaner Figure 4.8 - Setting the Spark Plug GapFigure 4.10 - Valve Clearance Adjustment 4.8 ADJUSTING VALVE CLEARANCE4.9 COOLING SYSTEM ‹ 4.12.1 REMOVAL FROM SERVICE 4.12 OUT OF SERVICE PROCEDURE‹ 4.12.2 RETURN TO SERVICE 4.10 ATTENTION AFTER SUBMERSIONATTENTION It is recommended that all service work 4.13 SERVICE SCHEDULEbe performed by the nearest Authorized Dealer Problem 5.1 TROUBLESHOOTING GUIDECause CorrectionSection 6 - Electrical Data ENGINE WIRINGCUSTOMER CONTROL PANEL BOXCONNECTION Electrical Schematic - 12 & 15 kW - Drawing No. 0D8501-B Section 6 - Electrical Data Section 6 - Electrical Data ENGINE WIRINGCONTROL PANEL BOX 224A 225AElectrical Schematic - 7 kW - Drawing No. 0D9014-C PRE PACKAGED UNITS ONLY Section 7 - Exploded Views and Parts ListsCLOTH, HARDWARE 266.7mm x 146mm 7KW PART NO. QTY. DESCRIPTIONFOAM, EXHAUST SIDE ENCLOSURE FRONT FOAM, BACK EXHAUST ENCLOSURE COVERSection 7 - Exploded Views and Parts Lists DESCRIPTION PART NO. QTY66 2, 5, 19, 20, 39, 40, 47, 64, 93 67 8, 11, 12 68 4, 5 Views and Parts Lists69 16A, 16B, 17 72 27, 28 73 3, 32, 33, 34, 35, 36, 40ASSEMBLY, CRANKSHAFT HORIZONTAL ASSEMBLY, CRANKCASE HOUSING WITHITEM PART NO. QTY. DESCRIPTION ROLLER BEARING, GOVERNOR PLATESection 7 - Exploded Views and Parts Lists ASSY, IGNITION COIL GV-990 CYLINDER 7 kW Generator - Drawing No. 0D3504-E 1.25 FT 1.8 FT32 31 12 kW and 15 kW Generator - Drawing No. 0D3417-L3 FT 2.6 FT1.44 FT Section 7 - Exploded Views and Parts Lists DESCRIPTION Section 7 - Exploded Views and Parts ListsSection 7 - Exploded Views and Parts Lists DESCRIPTION Section 7 - Exploded Views and Parts ListsSection 7 - Exploded Views and Parts Lists DESCRIPTION Section 8 - Mounting ALL DIMENSIONS IN MILLIMETERS INCHESDrawing No Air-cooledSection 9 - Notes MANUFACTURER’S EMISSION CONTROL SYSTEM WARRANTY COVERAGE YOUR WARRANTY RIGHTS AND OBLIGATIONSPURCHASER’S/OWNER’S WARRANTY RESPONSIBILITIES CALIFORNIA AND FEDERAL EMISSION CONTROL WARRANTY STATEMENTEMISSION RELATED PARTS INCLUDE THE FOLLOWING EMISSION CONTROL SYSTEM WARRANTYWARRANTY SCHEDULE GENERAC POWER SYSTEMS TWO YEAR LIMITED WARRANTY FOR GUARDIANTHIS WARRANTY SHALL NOT APPLY TO THE FOLLOWING PREPACKAGED EMERGENCY AUTOMATIC STANDBY GENERATORS
Top Page Image Contents