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Table of Contents

Guardian Air-cooled Generators

Generac® Power Systems, Inc.

Introduction ......................Inside Front Cover

Read This Manual Thoroughly ......................IFC

Operation and Maintenance............................IFC

How to Obtain Service ....................................IFC

Authorized Dealer Location Number..................IFC

Safety Rules ......................................................2

Section 1 – Installation ..................................4

1.1 Introduction to Installation ..........................4

1.1.1 Installation Assistance......................4

1.1.2 Standards Index ..............................4

1.2 Unpacking....................................................4

1.2.1 Precautions ......................................4

1.2.2 Inspection ........................................4

1.3 Before Installation........................................5

1.4 Lifting the Generator....................................5

1.5 Engine Oil Recommendations ......................5

1.6 Gaseous Fuel System ..................................5

1.6.1 Fuel System Requirements

and Recommendations ....................5

1.6.2 Fuel Consumption ............................6

1.6.3 Fuel Pipe Sizing................................6

1.6.4 Reconfiguring the Fuel System ........6

1.7 Location and Mounting ................................7

1.7.1 Generator ........................................7

1.7.1.1 6 kW, 8 kW and

10 kW Units (Non-SA) ......7

1.7.1.2 Sound Attenuated Units ....7

1.7.2 Transfer Switch................................7

1.7.2.1 6 Kw, 8 kW and

10 kW Units (Non-SA) ......7

1.7.2.2 Sound Attenuated Units ....7

1.8 Emergency Circuit Isolation Method ..........11

1.9 Total Circuit Isolation Method....................11

1.10 Generator AC Connection System ..............12

1.11 Wiring Interconnections ..............................12

1.11.1 6 kW, 8 kW and

10 kW Units (Non-SA) ....................12

1.11.2 Sound Attenuated Units ................12

1.12 Generators and GTS Transfer Switches ....14

1.13 Control Circuit Interconnections ................14

1.14 Adapting Three-phase Transfer Switch ......15

1.15 Control Board Configuration......................15

1.16 Grounding the Generator ..........................15

1.17 The Battery.................................................16

1.17.1 Battery Installation ........................17

1.18 The Fuse.............. ......................................17

1.19 Post Installation Inspection ........................17

Section 2 – Operation ..................................18

2.1 Using the Auto/Off/Manual Switch ..............18

2.1.1 “Auto” Position................................18

2.1.2 “Off” Position..................................18

2.1.3 “Manual” Position ..........................18

2.2 Automatic Transfer Operation....................18

2.3 Sequence of Automatic Operation ..............19

2.4 Manual Transfer Operation........................19

2.4.1 Transfer to Generator

Power Source ..................................19

2.4.2 Transfer Back to Utility

Power Source ..................................20

2.5 Protection Systems ....................................20

2.5.1 Low Oil Pressure Switch ................20

2.5.2 High Temperature Switch ..............20

2.5.3 Overcrank ......................................20

2.5.3.1 Approximate Crank

Cycle Times ....................21

2.5.4 Overspeed ......................................21

2.6 Additional Generator Features ..................21

2.6.1 6 kW, 8 kW and

10 kW Units (Non-SA) ....................21

2.6.2 Sound Attenuated Units ................21

Section 3 – Post-installation Start-up

Adjustments ..............................22

3.1 Before Initial Start-up ................................22

3.2 Check Transfer Switch Operation ..............22

3.3 Electrical Checks ......................................22

3.4 Generator Tests Under Load ......................22

3.5 Checking Automatic Operation ..................23

3.6 Adjusting the Load Block ..........................23

3.7 Engine Governor Adjustment ....................24

3.7.1 6 kW Units (Non-SA) ......................24

3.7.2 8 kW and 10 kW Units (Non-SA)....24

3.7.3 Sound Attenuated Units ................25

3.8 Voltage Regulator Adjustment ....................25

3.9 Overspeed Calibration................................25

3.9.1 6 kW, 8 kW and

10 kW Units (Non-SA) ....................26

3.9.2 Sound Attenuated Units ................26

3.10 Setting the Exercise Timer ........................26

3.10.1 6 kW, 8 kW and

10 kW Units (Non-SA) ....................26

3.10.2 Sound Attenuated Units ................26

Section 4 – Troubleshooting ......................27

4.1 Troubleshooting Guide ..............................27

4.2 Installation Checklist ................................28

Section 5 – Notes ..........................................29