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