SHOULD ATTEMPT INSTALLATION
Liquid-cooled, Prepackaged Standby Generators
POWER SYSTEMS, INC
004373-2 40 kW/Single-phase w/ 200 Amp Transfer Switch
HOW TO OBTAIN SERVICE
CONTENTS
OPERATION AND MAINTENANCE
This symbol points out important safety informa
Miscellaneous Maintenance
Table of Contents
Engine DC Electrical System
Parts of the generator are rotating and/or hot
GENERAL HAZARDS
Despite the safe design of this generator
during operation. Exercise care near running gen- erators
FIRE HAZARDS
ELECTRICAL HAZARDS
EXPLOSION HAZARDS
The generator’s weight of more than 2,000
1.4 PREPACKAGED TRANSFER SWITCH
Figure 1.1 - Single-phase Generator AC Connection System
1.1 UNPACKING/INSPECTION
1.7.1 LOW OIL PRESSURE SWITCH
1.8 SPECIFICATIONS
1.7.3 LOW COOLANT LEVEL SWITCH
1.6 MAIN CIRCUIT BREAKER
1.8.2 ENGINE
1.9 FUEL REQUIREMENTS AND RECOMMENDATIONS
1.8.1.1 Generator and Load Compatibility
1.9.1 CONVERSION TO LP GAS VAPOR
1.10 ENGINE OIL RECOMMENDATIONS
1.11 COOLANT
1.12 EMISSIONS CONTROL SYSTEM
1.12.1 AIR FUEL RATIO CONTROLLER
NFPA STANDARDS
STANDBY GENERATOR INSTALLATION
2.1 BASIC STANDBY ELECTRIC SYSTEM
OTHER PUBLISHED STANDARDS
2.6.2 “GTS” Type Engineered Switch
2.6 TRANSFER SWITCH START SIGNAL CONNECTIONS
2.6.1 Pre-Packaged Type Switch
2.2 EMERGENCY CIRCUIT ISOLATION METHOD
DO NOT cause flame or spark in battery area, and
2.7 BATTERY INSTALLATION
DO NOT SMOKE when near batteries
2.8 PREPARATION BEFORE START-UP
2.8.3 Fuel System
2.8.2 Transfer Switch
2.8.1 PRIOR TO INITIAL START-UP
2.8.6 Belt Tension
3.2 USING THE AUTO/OFF/MANUAL SWITCH
3.1 CONTROL CONSOLE COMPONENTS
3.2.3 “MANUAL” POSITION
With the switch set to AUTO, the engine may
3.2.2 “OFF” POSITION
3.3 AUTOMATIC TRANSFER OPERATION
3.6 WEEKLY EXERCISE CYCLE
Figure 3.3 - “Set Exercise” Switch on Control Panel
If you switch the Auto/Off/Manual switch is
4.1 CHECKING THE ENGINE OIL LEVEL
4.2 CHANGING THE ENGINE OIL AND FILTER
4.2.2 Oil and Filter Change Procedure
4.3 CHANGING THE ENGINE AIR CLEANER
4.2.1 Engine Oil Recommendations
Figure 4.3 - Engine Air Cleaner
4.5 BATTERY MAINTENANCE
Battery replacement
Figure 4.4 - Setting the Spark Plug Gap
4.8 DC FUSE
4.10 MISCELLANEOUS MAINTENANCE 4.10.1 Cleaning the Generator
4.7 OVERLOAD PROTECTION FOR ENGINE DC ELECTRICAL SYSTEM
4.9 ENGINE COOLANT
4.11.2 Return To Service
4.11 OUT OF SERVICE PROCEDURE 4.11.1 Removal From Service
4.10.2 Rodent Protection
ATTENTION It is recommended that all service work
4.12 SERVICE SCHEDULE
be performed by your nearest Generac/Guardian Authorized Dealer
CAUSE
5.1 TROUBLESHOOTING GUIDE
PROBLEM
CORRECTION
Electrical
Schematic Control
Generac Power Systems, Inc
Model No
Section
22 Generac Power Systems
Model No. WiringDiagram
004373
Generac
Power Systems, Inc
Model No. 004626-1 Guardian Schematic Control
Section 6 - Electrical Data
Generac Power Systems,Inc
Section 6 -ElectricalData
Generac Power Systems, Inc
Section 6 - Electrical Data
26 Generac Power Systems, Inc
Generac Power Systems, Inc
Section 6 - Electrical Data
Panel - Drawing No
Wiring Diagram
28 Generac Power Systems, Inc
004262-1 Guardian
Electrical Schematic - Lower Panel - Drawing No. 0D5997
CUSTOMER CONNECTION
T2 T1 U N2 T N1 S
120/240-V. 1-PHASE
Control Panel - Drawing No. 0D4995-C
PANEL FACE
Power
Model No. 004373-2 Guardian Liquid-cooled
PART NO. QTY. DESCRIPTION
PART NO. QTY. DESCRIPTION
0D1523
Control Panel - Drawing No. 0D6978-A
32 Generac Power Systems, Inc
NO USER SERVICEABLE PARTS
Model No. 004626-1 Guardian Liquid-cooled
PART NO. QTY
PART NO. QTY
DESCRIPTION
DESCRIPTION
PART NO.QTY
34 Generac Power Systems, Inc
DESCRIPTION
To Oil Drain
DESCRIPTION
DESCRIPTION
On Oil Pan
4640
36 Generac Power Systems, Inc
31 33
Engine Common Parts - Drawing No. 0A4304-L
For internal engine parts use Engine Parts Manual P/N 0D3749
Model Nos. 004373-2 & 004626-1 Guardian Liquid-cooled 40 kW Generator
PART NO.QTY. DESCRIPTION
38 Generac Power Systems, Inc
40KW GUARDIAN WIRE HARNESS NOT
CONNECTOR COIL TO DISTRIBUTOR
HOUSING THERMOSTAT/WATER INLET
HARNESS 4.3L STD WIRE NOT SHOWN
STATOR
TO ENGINE FlLYWHEEL ADJUSTMENT
ENGINEROTATENOTDODURING THIS ADJUSTMENT
LEADS
PART NO. QTY
ASSEMBLY FAN W/PRESS DISC 10.75 X
DESCRIPTION
DESCRIPTION
DESCRIPTION
42 Generac Power Systems, Inc
DESCRIPTION
DESCRIPTION
Section 7 - Exploded Views and Parts Lists
DESCRIPTION
KIT PART NO. 0D7947
TO STEPPER
USE FASTENER LOCATED ON ALTERNATOR FAN SCROLL
REGULATOR
MOTOR
PART NO. QTY
PART NO. QTY
DESCRIPTION
DESCRIPTION
QTY. DESCRIPTION
46 Generac Power Systems, Inc
QTY. DESCRIPTION
DESCRIPTION
Section 7 - Exploded Views and Parts Lists
PART NO. QTY
PART NO. QTY
Hose
QTY. DESCRIPTION
Lower Radiator To Water
Pump
BLACK
TO STARTER
SOLENOID
TO ENGINE BLOCK
LEADS
WIRE
ALT LEADS SENSING WIRE
SENSING
DECAL REMOTE START CONNECTION
DESCRIPTION
DESCRIPTION
DECAL CUSTOMER CONNECTN FOR TS
52 Generac Power Systems, Inc
Model No 004626-1 Guardian Liquid-cooled 40 kW Generators
PART NO. QTY. DESCRIPTION
PART NO. QTY. DESCRIPTION
Exhaust Muffler - Drawing No. 0D6976-A
DESCRIPTION
54 Generac Power Systems, Inc
DESCRIPTION
Compartment
Section 8 - Notes
Generac Power Systems, Inc
Guardian Liquid-cooled 40 kW Generators
Section 9 - Installation Drawings
56 Generac Power Systems, Inc
Generac Power Systems, Inc
RECOMMENDED FUEL/ELECTRICAL STUB-UPS SEE TOP VIEW
GENERAC POWER SYSTEMS, INC
GENERAC POWER SYSTEMS TWO YEAR STANDARD WARRANTY FOR GUARDIAN
WARRANTY SCHEDULE
PREPACKAGED EMERGENCY AUTOMATIC STANDBY GENERATORS