1. Manuals
  2. Brands
  3. Generac Power Systems Manuals
  4. Inverter
  5. Guardian 004721-0
  6. Owner's manual

Generac Power Systems 004721-0, 004722-0, 004723-0, 004724-0, 004725-0, 004725-1, 004725-2, 004725-3, 004726-0 Owner's Manual

Liquid-cooled, prepackaged standby generators
Hide thumbs Also See for 004721-0, 004722-0, 004723-0, 004724-0, 004725-0, 004725-1, 004725-2, 004725-3, 004726-0:
Table of Contents

Advertisement

Quick Links

Owner's Manual
Liquid-cooled, Prepackaged
Standby Generators
Model Numbers
004721-0, 004722-0,
004723-0, 004724-0,
004725-0, 004725-1,
004725-2, 004725-3,
004726-0
!
!
Not intended for use in critical life support applications.
ONLY QUALIFIED ELECTRICIANS OR CONTRACTORS SHOULD ATTEMPT
INSTALLATION!!
DEADLY EXHAUST FUMES. OUTDOOR INSTALLATION ONLY!
This manual should remain with the unit.

Advertisement

Table of Contents
loading

Related Manuals for Generac Power Systems 004721-0, 004722-0, 004723-0, 004724-0, 004725-0, 004725-1, 004725-2, 004725-3, 004726-0

Summary of Contents for Generac Power Systems 004721-0, 004722-0, 004723-0, 004724-0, 004725-0, 004725-1, 004725-2, 004725-3, 004726-0

  • Page 1 Owner’s Manual Liquid-cooled, Prepackaged Standby Generators Model Numbers 004721-0, 004722-0, 004723-0, 004724-0, 004725-0, 004725-1, 004725-2, 004725-3, 004726-0 Not intended for use in critical life support applications. ONLY QUALIFIED ELECTRICIANS OR CONTRACTORS SHOULD ATTEMPT INSTALLATION!! DEADLY EXHAUST FUMES. OUTDOOR INSTALLATION ONLY! This manual should remain with the unit.

  • Page 2: Introduction

    INTRODUCTION Thank you for purchasing this model of the standby generator set product line by Generac Power Systems. Every effort was expended to make sure that the information and instructions in this manual are both accurate and current at the time the manual was writ- ten.

  • Page 3: Table Of Contents

    Troubleshooting Points...22 Section 6 — NOTES...23 Section 7 — INSTALLATION Section 8 — ELECTRICAL DATA ...26 Section 9 — EXPLODED VIEWS AND Section 10 — WARRANTY ...48 Table of Contents DIAGRAM ...25 PARTS LISTS ...30 Generac ® Power Systems, Inc.

  • Page 4: Safety Rules

    Generac ® Power Systems, Inc. GENERAL HAZARDS • For safety reasons, Generac recommends that this equipment be installed, serviced and repaired by a Generac Authorized Service Dealer or other compe- tent, qualified electrician or installation technician who is familiar with applicable codes, standards and regulations.

  • Page 5: Electrical Hazards

    Keep the area surrounding the generator clean and free from debris. • Generac generator sets may operate using one of sev- eral types of fuels. All fuel types are potentially FLAM- MABLE and/or EXPLOSIVE and should be handled with care.

  • Page 6: Section 1 - General Information

    • Protect the switch at all times against excessive moisture, dust, dirt, lint, construction grit and cor- rosive vapors. • Failure to utilize a Generac/Guardian transfer switch with this generator will void the warranty. Generac ®...

  • Page 7: Engine Protective Devices

    % over rating 112% 108% 120% 1.7.1 LOW OIL PRESSURE SWITCH Figure 1.4 - Low Oil Pressure Switch 1.7.2 HIGH COOLANT TEMPERATURE SWITCH 1.7.3 LOW COOLANT LEVEL SWITCH Generac ® Power Systems, Inc. Circuit Breaker 70A BQ2 90A BQ2 125A BQ2...

  • Page 8: Unpacking

    The unit will not start or crank if the fuse is blown. Replace the fuse with one of the same size, type, and rating. Generac normally uses an AGC fuse rated at 15 amps (part number 022676). Handle shipping cartons and crates with care. Use care to avoid damage from dropping, bumping, colli- sion, etc.

  • Page 9: Specifications

    Figure 1.8 — Reconfigure the Fuel System Port 1 FUEL HOSE FUEL HOSE BRASS HOSE BRASS HOSE FITTING FITTING PORT 1 PORT 2 HOUSING HOUSING PORTS PORTS NG FUEL SYSTEM Generac ® Power Systems, Inc. Port 2 PLUG LP FUEL SYSTEM...

  • Page 10: Torque Specifications

    “emergency” distribution panel. This generator can be installed in conjunction with a standard Generac “GTS” type transfer switch, if desired. The standard transfer switch has no sensing or con- trolling circuit boards.

  • Page 11: Generator Location

    NOTE: For more information about the installation of a standby system, order Engine-Generator Standby Electric Power Systems Installer’s Guide and Reference Manual (part #046622) from a Generac Authorized Service Dealer. 2.1.1 NFPA STANDARDS The following published standards booklets pertain- ing to standby electric systems are available form the...

  • Page 12: Emergency Circuit Isolation Method

    Section 2 — Installation Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators NOTE: Generac recommends the use of a Generac Power Systems “GTS” type transfer switch in conjunc- tion with this generator. EMERGENCY CIRCUIT ISOLATION METHOD This prevents overloading the generator by keeping electrical loads below the wattage/amperage capacity of the generator.

  • Page 13: Battery Installation

    Before starting the generator for the first time, the installer must complete the following procedures. For follow-up maintenance information and/or service intervals, please refer to Section 4, “Maintenance.” NOTE: Generac ® Power Systems, Inc. 11...

  • Page 14: Section 3 - Operation

    ® Power Systems, Inc. When required, the pre-packaged standby generator can be installed with a standard Generac “GTS” type engineered automatic transfer switch. When a GTS type transfer switch is used, it controls automatic operation and automatic transfer as fol- lows: •...

  • Page 15: Manual Transfer And Startup

    • Wait 30 seconds before setting the AUTO/OFF/ MANUAL switch to AUTO position. Section 3 - Operation NOTE: 3.2.6 SET EXERCISE TIME SWITCH MANUAL TRANSFER AND START-UP AUTOMATIC OPERATION WEEKLY EXERCISE CYCLE Generac ® Power Systems, Inc. 13...

  • Page 16: Engine Heater

    (Figure 3.3), similar to the block heaters used in automotive applications. The block heater is wired to a grounded plug. Figure 3.3 - Engine Block Heater 14 Generac ® Power Systems, Inc. Refer to applicable wiring diagram(s) and electrical schematic(s) at back of manual for wiring connec- tions.

  • Page 17: Cooling System

    If coolant level is low, inspect gasket in radiator pressure cap. Replace cap, if necessary. To have pressure cap tested, contact an authorized Generac Service Dealer. Inspect cooling system and coolant recovery system for leaks. 4.5.1 CHECK ENGINE OIL LEVEL Refer to “Checking Fluid Levels”...
  • Page 18 Some connected electrical load devices may be damaged by incorrect fre- quency and/or voltage. Only qualified service technicians should adjust the governed speed. 16 Generac ® Power Systems, Inc. 4.5.10 CHANGING ENGINE OIL Refer to maintenance performed by authorized serv- ice facilities for engine oil and filter change frequen- cies.

  • Page 19: Miscellaneous Maintenance

    Any spark, heat or flames can ignite the gas and cause an explosion which can shatter the battery, causing blindness or other serious injury. MISCELLANEOUS MAINTENANCE Generac ® Power Systems, Inc. 17...
  • Page 20 BCI Group No. 26/26R NOTE: The BCI number should be located directly on the battery. PERIODIC REPLACEMENT PARTS Part Name Generac’s Part Number Oil Filter # 0A45310244 Radiator Cap # 046627 Air Cleaner # 059402 Spark Plug # 0A45310275 525 @ 0 deg.

  • Page 21: Scheduled Maintenance

    SCHEDULED MAINTENANCE The following is a recommended maintenance schedule for Generac Guardian small standby and residential gen- erator sets. The established intervals in the schedule are the maximum recommended when the unit is used in an average service application. They will need to be decreased (performed more frequently) if the unit is used in a severe application.
  • Page 22 Correct as necessary. 12. Test the engine and transfer switch safety devices. Correct and/or adjust as necessary. 20 Generac ® Power Systems, Inc. Level 2 Task Required Task Comp. to be done Comp.
  • Page 23 3 months/ (Date- Initials) Break-in Initials) 30 hrs. Level 3 Level 4 Required Task to be done Comp. Required Semi- (Date- to be done annually/ Initials) Annually/ 50 hrs. 100 hrs. Generac ® Power Systems, Inc. 21 Task Comp. (Date- Initials)

  • Page 24: Section 5 - Troubleshooting

    1. Replace switch. 2. Reconnect/close wire. 3. Replace board. 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. Contact an Authorized Generac facility. 5. Auto-reset - Wait five min. and attempt restart.

  • Page 25: Section 6 - Notes

    Section 6 — Notes Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Generac ® Power Systems, Inc. 23...
  • Page 26 Section 6 — Notes Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators 24 Generac ® Power Systems, Inc.

  • Page 27: Section 7 - Installation Diagram

    Section 7 - Installation Diagram Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Drawing No. 0E1533 Generac ® Power Systems, Inc. 25...

  • Page 28: Section 8 - Electrical Data

    Section 8 - Electrical Data Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Wiring Diagram — Control Panel —Drawing No. 0E0345 26 Generac ® Power Systems, Inc. BLACK...
  • Page 29 Wiring Diagram — 1.5L Engine — Drawing No. 0E0343-A DC-VR 1 1 2 12-V. BATTERY ELECTRONIC GOVERNOR CONTROLLER Section 8 - Electrical Data DC-A BLACK TO 120V/15A BLACK UTILITY FED WHITE CIRCUIT GREEN ACTUATOR CONNECTOR Generac ® Power Systems, Inc. 27 GOVERNOR ACTUATOR...
  • Page 30 Section 8 - Electrical Data Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Wiring Diagram — 1.5L Guardian — Drawing No. 0E1525 BLACK BLACK BLUE BLUE ® 28 Generac Power Systems, Inc.
  • Page 31 EH - ENGINE HEATER FS - FUEL SOLENOID GRD - GROUND ISC - IGNITION SYSTEM CONTACT LOS - LOW OIL SWITCH SM - STARTER MOTOR WTS - WATER TEMPERATURE SWITCH WLS - WATER LEVEL SWITCH Generac BLACK LEGEND ® Power Systems, Inc. 29...

  • Page 32: Parts Lists

    084543A 098783 037398 0E1326 0A7106 074031 029333A 022507 022473 064526 0E1694 30 Generac ® Power Systems, Inc. "A" INTAKE MANIFOLD (REF.) DESCRIPTION ASM MOTOR STEPPER HOUSING GOVERNOR CONNECTOR CONNECTOR INTERFACE ASSEMBLY COVER CONNECTOR HOUSING SCREW FHM #2 X 5/8 SELF TAP SCREW HHC M6-1.0 X 10 G8.8...
  • Page 33 SCREW HHC M6-1.0 X 16 G8.8 WASHER LOCK M6-1/4 WASHER FLAT 1/4-M6 ZINC LUG SLDLSS #2-#8 X 17/64 CU NUT HEX M6 X 1.0 G8 YEL CHR WASHER SHAKEPROOF EXT 1/4 STL 1-1/2" BUTTON PLUG Generac ® Power Systems, Inc. 31...
  • Page 34 Section 9 - Exploded Views and Parts Guardian Liquid-cooled 15 kW and 20 kW Generators Standard Compartment — Drawing No. 0E0771-D 32 Generac ® Power Systems, Inc.
  • Page 35 ASSEMBLY COVER ACCESS WASHER FLAT 1/4 ZINC WASHER LOCK M6-1/4 GASKET CLIP-ON SELF GRIPPING LATCH AND CAM NUT HEX JAM 3/8-24 SS GASKET CLIP-ON SELF GRIPPING DUCT LH SIDE 1.5L DUCT RH SIDE 1.5L Generac ® Power Systems, Inc. 33...
  • Page 36 Section 9 - Exploded Views and Parts Guardian Liquid-cooled 25 kW Generators Acoustic Compartment — Drawing No. 0E0772-E 34 Generac ® Power Systems, Inc.
  • Page 37 ACSTC INSLTN 1.5L REAR BRC PNL ACSTC INSLTN 1.5L BAFFLE PANEL ACSTC INSLTN 1.5L CNTRL SUPPT GASKET CLIP-ON SELF GRIPPING LATCH AND CAM NUT HEX JAM 3/8-24 SS DUCT LH SIDE 1.5L DUCT RH SIDE 1.5L Generac ® Power Systems, Inc. 35...
  • Page 38 Section 9 - Exploded Views and Parts Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Control Panel — Drawing No. 0E0778-G 36 Generac ® Power Systems, Inc.
  • Page 39 NUT HEX M6 X 1.0 G8 YEL CHR SCREW HHC #10-32 X 1/2 WASHER SHAKEPROOF EXT 1/4 NUT HEX #10-32 STEEL WASHER LOCK #10 CAPACITOR FILTER ASY SCREW PHTT #6-32 X 5/8 ZYC DECAL WARNING REMOVE FUSE Generac ® Power Systems, Inc. 37...
  • Page 40 Section 9 - Exploded Views and Parts Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Engine — Drawing No. 0E1228-E 38 Generac ® Power Systems, Inc.
  • Page 41 V-BELT 3/8 X 32-1/8 1.5L V-BELT 3/8 X 28.9 1.5L SPACER PULLEY FILTER OIL ADAPTER DRAIN OIL GROUND WIRE (STARTER) CLAMP HOSE - OIL DRAIN HOSE ASM.-OIL DRAIN CAP HEX 1/4NPT BRASS SCREW CRMPTIT 1/4-20 X 5/8 Generac ® Power Systems, Inc. 39...
  • Page 42 Section 9 - Exploded Views and Parts Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Radiator — Drawing No. 0E0769-G 40 Generac ® Power Systems, Inc.
  • Page 43 TANK COOLANT RECOVERY BRACKET WATER BOTTLE 1.5L MIT BARBED STR 1/4 NPT X 3/8 FOAM 1.5 X 1 ADH BAK SCREW SWAGE 10-32 X 5/16 Z/YC SPRING CLIP HOLDER .37-.62 ASSY. RAD. DRAIN HOSE Generac ® Power Systems, Inc. 41...
  • Page 44 Section 9 - Exploded Views and Parts Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Fuel System — Drawing No. 0E0774-D "C" "D" PORT "OUT 2" L.P. VAPOR 42 Generac ® Power Systems, Inc. 37 35 PORT "OUT 1" (NATURAL GAS) "D"...
  • Page 45 BARBED STR 3/8NPT X 1/2 W/VS HOSE LPG & NAT GAS 1/2 ID (23"LG) CLAMP HOSE #10 .56 - 1.06 PLATE, GAS REGULATOR MOUNTING SCREW HHC M8-1.25 X 16 G8.8 SCREW TH-FRM M6-1 X 16 N WA Z/JS Generac ® Power Systems, Inc. 43...
  • Page 46 Section 9 - Exploded Views and Parts Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Alternator — Drawing No. 0A9348-F 44 Generac ® Power Systems, Inc.
  • Page 47 WASHER FLAT 3/8-M10 ZINC SPACER ROTOR SHAFT SCREW HHC M12-1.25 X 25 G8.8 WASHER FLAT M12 DECAL WARN ENG START WASHER SHAKEPROOF INT #8 WASHER FLAT .34 ID X .75 OD DECAL, DANGER STANBY UNITS Generac ® Power Systems, Inc. 45...
  • Page 48 022131 046526 052213 075763 0D8668 050331A 050331 0C2454 025507 027482 46 Generac ® Power Systems, Inc. STARTER SOLENOID DESCRIPTION BATT 12VDC 75-AH 26 CABLE BATT RED #4 X 20.00 CABLE BATT BLK #4 X 23.00 ASSY,WIRE#16 RED 1.6 WASHER FLAT 3/8 ZINC WASHER LOCK M10 SCREW HHC M10-1.25 X 20 G8.8...
  • Page 49 BLANKET, EXHAUST 1.5L MITSU MUFFLER,1.5L ACOUSTIC&STANDARD STRAP MUFFLER 6" DIA SCREW HHC M8-1.25 X 20 G8.8 WASHER FLAT 5/16 ZINC WASHER LOCK M8-5/16 NUT HEX M8-1.25 G8 YEL CHR CAP RAIN 2" SCREW RHM 1/4-20 X 2-1/4 Generac ® Power Systems, Inc. 47...

  • Page 50: Section 10 - Warranty

    Owner’s Manual. For warranty purposes, Generac recommends that you retain all receipts covering maintenance on your engine. However, Generac cannot deny warranty solely due to the lack of receipts or for your failure to ensure the completion of all scheduled maintenance.

  • Page 51: Emission Control System Warranty

    Such use voids this ECS Warranty and shall be sufficient grounds for disallowing an ECS Warranty claim. Generac shall not be held liable hereunder for failures of any warranted parts of a Generac engine caused by the use of such an unapproved, add-on, modified, counterfeit and/or “grey market”...
  • Page 52 "PREPACKAGED EMERGENCY AUTOMATIC STANDBY GENERATORS" For a period of two years Generac Power Systems, Inc. (Generac) will, at its option, repair or replace any part which, upon examination, inspection and testing by Generac or a Generac Authorized Warranty Service Dealer, is found to be defective under normal use and service, in accordance with the warranty schedule set forth below.

Table of Contents