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