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Table of Contents
Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators
Generac
®
Power Systems, Inc. 1
Introduction ........................Inside Front Cover
Read This Manual Thoroughly ........................IFC
Contents ..........................................................IFC
Operation and Maintenance ............................IFC
How to Obtain Service ....................................IFC
Authorized Dealer Locator Number ....................IFC
Safety Rules ........................................................2
Standards Index ..................................................3
Section 1 – General Information ..................4
1.1 Unpacking/Inspection ....................................4
1.2 Protection Systems ........................................4
1.3 System Set LED ............................................4
1.4 Your Generator ..............................................5
1.5 Specifications ................................................6
1.5.1 Generator ..........................................6
1.5.2 Engine ................................................6
1.6 Fuel Requirements and Recommendations....7
1.7 Fuel Consumption ........................................7
1.8 Reconfiguring the Fuel System ......................7
1.8.1 7 kW, 410cc Engine ............................7
1.8.2 12 kW and 15 kW, 990cc Engine ........7
1.9 Location ........................................................8
1.9.1 Generator ..........................................8
1.9.2 Transfer Switch ..................................8
1.10 Battery Installation ........................................8
1.11 The Battery....................................................9
Section 2 – Post Installation Start-up
and Adjustments ......................10
2.1 Before Initial Startup ..................................10
2.2 Check Transfer Switch Operation................10
2.3 Electrical Checks ........................................10
2.4 Generator Tests Under Load ......................11
2.5 Checking Automatic Operation ....................11
2.6 Adjusting the Regulator (Natural Gas Only) ..11
2.7 Engine Governor Adjustment ......................12
2.7.1 7 kW Units ......................................12
2.7.2 12 kW and 15 kW Units ..................13
2.7.3 Additional Corrosion Protection ......13
2.8 Voltage Regulator Adjustment......................13
Section 3 – Operation ....................................13
3.1 Break-in Procedure......................................13
3.2 Using the Auto/Off/Manual Switch ..............14
3.2.1 “Auto” Position ..................................14
3.2.2 “Off” Position ....................................14
3.2.3 “Manual” Position ............................14
3.3 Automatic Transfer Operation ....................14
3.4 Sequence of Automatic Operation................14
3.5 Manual Transfer Operation ........................15
3.5.1 Transfer to Generator
Power Source......................................15
3.5.2 Transfer Back to Utility
Power Source......................................15
3.6 Setting the Exercise Timer ..........................15
3.7 Protection Systems ......................................16
3.7.1 Low Oil Pressure Switch ..................16
3.7.2 High Temperature Switch ................16
3.7.3 Overcrank ........................................16
3.7.4 Overspeed ........................................16
Section 4 – Maintenance ..............................16
4.1 Fuse ............................................................16
4.2 Checking the Engine Oil Level ....................17
4.3 Changing the Engine Oil ..............................17
4.3.1 Engine Oil Recommendations ..........17
4.3.2 Oil Change Procedure ......................17
4.4 Changing the Oil Filter ................................18
4.5 Changing the Engine Air Cleaner ................18
4.5.1 7 kW, 12 kW and 15 kW
Generators........................................18
4.6 Spark Plug(s) ..............................................18
4.7 Battery Maintenance ....................................19
4.8 Adjusting GH-410/GT-990 Valve Clearance ..19
4.9 Cooling System............................................20
4.10 Attention After Submersion ........................20
4.11 Corrosion Protection ..................................20
4.12 Out of Service Procedure ............................21
4.12.1 Removal From Service ......................21
4.12.2 Return to Service..............................21
4.13 Service Schedule ........................................22
Section 5 – Troubleshooting ........................23
5.1 Troubleshooting Guide ................................23
Section 6 – Electrical Data ............................24
Section 7 – Exploded Views and
Parts Lists....................................32
Section 8 – Mounting Dimensions..............53
Section 9 – Notes ............................................54
Section 10 – Warranty ....................................56