Generac 004626-1, 004373-2, 004373-2, 004626-1 Table of Contents, Engine DC Electrical System

Table of Contents

Guardian Liquid-cooled 40 kW Generator

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
Section 1 – General Information			4
1.1	Unpacking/Inspection		4
	1.1.1	Lifting the Generator	4
1.2	The Generator		4
1.3	Generator AC Connection Systems		4
1.4	Prepackaged Transfer Switch		4
1.5	Automatic System Operation		4
1.6	Main Circuit Breaker		5
1.7	Engine Protective Devices		5
	1.7.1 Low Oil Pressure Switch		5
	1.7.2	High Coolant
		Temperature Switch	5
	1.7.3 Low Coolant Level Switch		5
	1.7.4	Overspeed Shutdown	5
	1.7.5	Overcrank Shutdown	5
	1.7.6	DC Fuse	5
1.8	Specifications		5
	1.8.1	Generator	5
	1.8.1.1 Generator Load
		and Compatibility	6
	1.8.2	Engine	6

1.9Fuel Requirements

	and Recommendations	6
	1.9.1 Conversion to LP Gas Vapor	6
1.10	Engine Oil Recommendations	7
1.11	Coolant	7
1.12	Emission Control System	7

Section 2 – Installation			8
2.1	Basic Standby Electric System		8
2.2	Emergency Circuit Isolation Method		9
2.3	Total Circuit Isolation Method		9
2.4	Grounding the Generator		9
2.5	Generator AC Neutral Connections		9
2.6	Transfer Switch Start Signal Connections....		9
	2.6.1	Pre-Packaged Type Switch	9
	2.6.2	“GTS” Type Switch	9
2.7	Battery Installation		10
	2.7.1	Vented Batteries	10
2.8	Preparation Before Start-up		10
	2.8.1	Prior to Initial Start-up	11
	2.8.2	Transfer Switch	11
	2.8.3	Fuel System	11
	2.8.4	Generator Set Lubrication	11
	2.8.5	Engine Coolant	11

	2.8.6	Belt Tension	11
	2.8.7	Electrical System	11
	2.8.8	Rodent Protection	11
Section 3 – Operation			12
3.1	Control Console Components		12
	3.1.1	AC Voltmeter	12
	3.1.2	AC Ammeter	12
	3.1.3	AC Frequency Meter	12
	3.1.4	DC Voltmeter	12
	3.1.5	Hourmeter	12
	3.1.6	Auto/Off/Manual Switch	12
	3.1.7	Fault Indicator Lamp	12
	3.1.8	15-amp Fuse	12
	3.1.9	7.5 Amp Inline Fuse	12
	3.1.10	Voltage-phase Selector Switch	12
	3.1.11	Set Exercise Time Switch	12
3.2	Using the Auto/Off/Manual Switch		12
	3.2.1	“Auto” Position	12
	3.2.2	“Off” Position	13
	3.2.3	“Manual” Position	13
3.3	Automatic Transfer Operation		13
3.4	Sequence of Automatic Operation		13
3.5	Engine Heater		13
3.6	Weekly Exercise Cycle		14
Section 4 – Maintenance			14
4.1	Checking the Engine Oil Level		14
4.2	Changing the Engine Oil and Filter		15
	4.2.1	Engine Oil Recommendations	15
	4.2.2	Oil and Filter Change Procedure	15
4.3	Changing the Engine Air Cleaner		15
4.4	Spark Plugs		16
4.5	Battery Maintenance		16
4.6	Cooling System		17

4.7Overload Protection for

	Engine DC Electrical System			17
4.8	DC Fuse			17
4.9	Engine Coolant			17
4.10	Miscellaneous Maintenance			17
	4.10.1 Cleaning the Generator			17
	4.10.2 Rodent Protection			18
4.11 Out of Service Procedure				18
	4.11.1 Removal From Service			18
	4.11.2 Return to Service			18
4.12	Service Schedule			19
Section 5 – Troubleshooting				20
Section 6		– Electrical Data		21-29
Section 7		– Exploded Views and
		Parts Lists		30-54
Section 8		– Notes		55
Section 9		– Installation Drawings		........56-57
Section 10 – Warranty			Back Cover

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