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