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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.
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The operator is responsible for proper and safe use INTRODUCTION of the equipment. Generac strongly recommends that Thank you for purchasing this model of the standby the operator read this Owner's Manual and thor- generator set product line by Generac Power Systems. oughly understand all instructions before using this Every effort was expended to make sure that the equipment. Generac also strongly recommends information and instructions in this manual are both instructing other users to proper
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Table of Contents Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators INTRODUCTION ..................................IFC Section 3 — OPERATION....................12 3.1 Using a Standard “GTS” Transfer Switch....12 SAFETY RULES ......................................2 3.2 Control Console Components......................13 Section 1 — GENERAL 3.3 Manual Transfer and Startup......................13 INFORMATION..................4 3.4 Automatic Operation ..................................13 1.1 G
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IMPORTANT SAFETY INSTRUCTIONS Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators SAVE THESE INSTRUCTIONS – The manufacturer suggests that these rules for safe operation be copied and posted in potential hazard areas. Safety should be stressed to all ! ! operators, potential operators, and service and repair technicians for this equipment. SAVE THESE INSTRUCTIONS – This manual contains important instructions that should be followed during installation and maintenance of the generator and b
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IMPORTANT SAFETY INSTRUCTIONS Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Inspect the generator regularly, and promptly repair Generators installed with an automatic transfer or replace all worn, damaged or defective parts using switch will crank and start automatically when nor- only factory-approved parts. mal (utility) source voltage is removed or is below an acceptable preset level. To prevent such automatic Before performing any maintenance on the generator, start-up and
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Section 1 - General Information Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators 1.1 GENERATOR 1.3 AUTOMATIC SYSTEM OPERATION This equipment is a liquid-cooled, engine-driven gen- When this generator, along with its transfer switch, has erator set. The generator is designed to supply elec- been installed and interconnected, a circuit board in trical power that operates critical electrical loads the generator panel constantly monitors utility power during utility power failure. The unit h
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Section 1 - General Information Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Figure 1.2 - Main Circuit Breaker Model Rating Phase Actual Current C/B Rating* % over rating Circuit Breaker 004721/004722 15,000 1 62.5 70 112% 70A BQ2 004723/004724 20,000 1 83.3 90 108% 90A BQ2 004725/004726 25,000 1 104.2 125 120% 125A BQ2 * Amp Rating of CB structured under model. Recommended fuels should have a Btu content of at 1.7.1 LOW OIL PRESSURE SWITCH least 1,000 Btus per cubic foot for natura
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R24 R84 R83 R76 R23 R75 CR13 R88 R77 R CR14 R62 R9 CR15 R87 CR36 R37 CR20 CR17 R43 R38 R32 R42 R39 CR18 R48 R44 R35 R52 R33 R46 R36 R74 R41 R51 R29 R47 R40 CR3 R27 R8 R7 R86 R65 R30 R85 CR30 R31 R61 R19 CR32 R4 CR12 R59 R5 R22 R26 R6 R21 R25 R57 R20 CR2 CR16 R53 CR38 R18 R72 R17 R71 R16 R70 R78 CR8 CR21 R63 CR19 R13 R69 R15 CR24 R14 CR29 R81 R50 R54 R3 R2 R66 R67 CR34 CR35 R82 CR40 CR33 J1 17 1 Section 1 — General Information Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators LED 2 is YE
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Section 1 — General Information Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators NOTE: 1.10 SPECIFICATIONS Fuel consumption is given at rated maximum con- 1.10.1 GENERATOR SPECIFICATIONS tinuous power output when using natural gas rated at 1000 Btu per cubic foot and LP gas rated 2520 Btu per cubic foot. Actual fuel consumption Single-Phase obtained may vary depending on such variables as Model 004725 004723 004721 applied load, ambient temperature, engine condi- 004726 004724 004722 ti
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Section 2 — Installation Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators NOTE: 1.16 BEFORE INSTALLATION Port 1 is for NG only and Port 2 is for LP vapor Before installing this equipment, check the ratings of only. No provision for simultaneous fuels has been both the generator and the transfer switch. Read made. “Emergency Isolation Method” and “Total Circuit Isolation Method” in Sections 2.5 and 2.6. DANGER The generator’s rated wattage/amperage capacity must be adequate to handle all
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Section 2 — Installation Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Install the generator as close as possible to the 2.1.1 NFPA STANDARDS transfer switch. This reduces the length of wiring The following published standards booklets pertain- and conduit. ing to standby electric systems are available form the Install the generator as close as possible to the fuel National Fire Protection Association (NFPA), supply, to reduce the length of piping. HOWEVER, Batterymarch Park, Qui
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Section 2 — Installation Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Proper grounding helps protect personnel against 2.5 EMERGENCY CIRCUIT ISOLATION electrical shock in the event of a ground fault condi- METHOD tion in the generator or in connected electrical This prevents overloading the generator by keeping devices. In addition, grounding helps dissipate static electrical loads below the wattage/amperage capacity electricity that often builds up in ungrounded of the generator. If
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Section 2 — Installation Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Spilled electrolyte is to be washed down with an 2.10 BATTERY INSTALLATION acid-neutralizing agent. A common practice is to use a solution of one pound (500 grams) bicarbon- DANGER ate of soda to one gallon (4 liters) of water. The bicarbonate of soda solution is to be added until Standby generators installed with automatic the evidence of reaction (foaming) has ceased. The ! transfer switches will crank and star
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Section 3 — Operation Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Before starting the generator for the first time, the 2.11.7 ELECTRICAL SYSTEM installer must complete the following procedures. For Make sure the generator is properly connected to an follow-up maintenance information and/or service intervals, please refer to Section 4, “Maintenance.” approved earth ground and/or ground rod. Make sure the generator battery is fully charged, 2.11.2 TRANSFER SWITCH properly installed
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Section 3 - Operation Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators 3.2.4 15 AMP FUSE 3.2 CONTROL CONSOLE The fuse protects the control console’s DC control COMPONENTS circuit against electrical overload. If the fuse has The components of a liquid-cooled generator control melted open because of an overload, engine cranking console (Figure 3.1) are as follows: and startup cannot occur. If replacement of the fuse is necessary, use only an identical 15-amp fuse. (Type Figure 3.1 - Liqui
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Section 4 — Maintenance Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Set the AUTO/OFF/MANUAL switch to OFF. Figure 3.3 - Engine Block Heater Set generator main circuit breaker to OFF or OPEN. Locate the rocker switch on the control panel iden- tified with the words “Set Exercise Time” (Figure 3.2). Push “Set Exercise Time” switch to ON position for 20 to 30 seconds and then release. Switch will spring back into its original position when released. Wait 30 seconds before set
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Section 4 — Maintenance Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators E. EVERY 500 OPERATING HOURS 4.4 CHECKING FLUID LEVELS 1.Service air cleaner. 4.4.1 CHECK ENGINE OIL 2.Check starter. Check engine crankcase oil level (Figure 4.1) at least 3.Check engine DC alternator. every 20 hours of operation, or prior to use. F. EVERY 800 OPERATING HOURS Remove oil dipstick and wipe dry with a clean, 1.Retorque cylinder head. (See Torque Specs, lint-free cloth. Section 1.13.) Install oil
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Section 4 — Maintenance Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators 4.5 MAINTENANCE OWNER/ DANGER OPERATOR CAN PERFORM DANGER: Do not attempt to adjust the gover- nor. Only qualified service facilities should 4.5.1 CHECK ENGINE OIL LEVEL ! adjust the governor. Excessively high operat- Refer to “Checking Fluid Levels” in Section 4.4. ing speeds are dangerous and increase the risk of personal injury. Low speeds impose a heavy load on the engine when adequate 4.5.2 CHECK BATTERY eng
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Section 4 — Maintenance Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Figure 4.4 – Setting the Spark Plug Gap SET PLUG GAP AT 0.5-0.6 mm After refilling the crankcase with oil, always (0.020-0.025 inch) check oil level on dipstick. NEVER OPERATE ! ENGINE WITH OIL BELOW THE DIPSTICK “ADD” MARK. 7. Start engine and check for oil leaks. 4.5.11 CHANGING THE ENGINE AIR CLEANER To replace the engine air cleaner, (part number 059402), simply remove the air cleaner cover and replace the air
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Section 4 — Maintenance Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators Battery electrolyte fluid is an extremely caustic 4.6.2 BATTERY ! sulfuric acid solution that can cause severe All lead-acid storage batteries discharge when not in burns. Do not permit fluid to contact eyes, skin, use. Refer to specific instructions and warnings that clothing, painted surfaces, etc. Wear protective accompany the battery. If such information is not goggles, protective clothing and gloves when avail
