GENERAC® GUARDIAN® SERIES
STANDBY GENERATORS - PREPACKAGED
20 kW
Air-Cooled Gas Engine Generator Sets
INCLUDES:
• True Power® Electrical Technology
• Two Line LCD Tri-lingual
Digital Nexus™ Controller
• Electronic Governor
• 200 Amp Service Rated Nexus Smart
Switch™ with Digital Load Management
Technology, NEMA 3R Rated
• External Main Circuit Breaker,
System Status & Maintenance Interval
LED Indicators and GFCI Duplex Outlet
• Sound Attenuated Enclosure
• Flexible Fuel Line Connector
• Composite Mounting Pad
• Base Fascia
• Natural Gas or LP Gas Operation
• 3 Year Limited Warranty
Standby Power Rating
Model 005875-1 (Aluminum - Gray) - 20 kW 60Hz
• UL 2200 Listed
FEATURES
¡ INNOVATIVE DESIGN & PROTOTYPE TESTING are key components
of GENERAC’S success in “IMPROVING POWER BY DESIGN.” But it
doesn’t stop there. Total commitment to component testing, reliability
testing, environmental testing, destruction and life testing, plus testing
to applicable CSA, NEMA, EGSA, and other standards, allows you to
choose GENERAC POWER SYSTEMS with the confidence that these
systems will provide superior performance.
¡ TRUE POWER® ELECTRICAL TECHNOLOGY: Superior harmonics and
sine wave form produce less than 5% Total Harmonic Distortion for utility
quality power. This allows confident operation of sensitive electronic equipment
and micro-chip based appliances, such as variable speed HVAC.
¡ TEST CRITERIA:
PROTOTYPE TESTED NEMA MG1-22 EVALUATION
SYSTEM TORSIONAL TESTED MOTOR STARTING ABILITY
¡ SOLID-STATE, FREQUENCY COMPENSATED VOLTAGE REGULATION.
This state-of-the-art power maximizing regulation system is standard on
all Generac models. It provides optimized FAST RESPONSE to changing
load conditions and MAXIMUM MOTOR STARTING CAPABILITY by
electronically torque-matching the surge loads to the engine. Digital
voltage regulation at +/- 1%.
¡ SINGLE SOURCE SERVICE RESPONSE from Generac’s extensive dealer
network provides parts and service know-how for the entire unit, from the
engine to the smallest electronic component.
¡ GENERAC TRANSFER SWITCHES. Long life and reliability are
synonymous with GENERAC POWER SYSTEMS. One reason for this
confidence is that the GENERAC product line includes its own transfer
systems and controls for total system compatibility.
FEATURES Generac
®
Guardian® Series Standby Generator - 20 kW
•Generac (OHVI) Design
•”Spiny-lok” cast iron cylinder walls
•Electronic ignition/spark advance
•Full pressure lubrication system
ENGINE
•Low oil pressure shutdown system
•High temperature shutdown
•Revolving field
•Skewed stator
•Displaced phase excitation
•Automatic voltage regulation
GENERATOR
•UL 2200 Listed
•Fully Automatic
•DLM Technology
Maximizes engine “breathing” for increased fuel efficiency. Plateau honed cylinder walls and plasma
moly rings helps the engine run cooler, reducing oil consumption resulting in longer engine life.
Rigid construction and added durability provide long engine life.
These features combine to assure smooth, quick starting every time.
Pressurized lubrication to all vital bearings means better performance, less maintenance and longer
engine life. Now featuring a 2 year/200 hour oil change interval.
Superior shutdown protection prevents catastrophic engine damage due to low oil.
Prevents damage due to overheating.
Allows for smaller, light weight unit that operates 25% more efficiently than a revolving armature generator.
Produces a smooth output waveform for compatibility with electronic equipment.
Maximizes motor starting capability.
Regulates the output voltage to ±1% prevents damaging voltage spikes.
For your safety.
Transfers your vital electrical loads to the energized source of power.
Digital Load Management technology allows for the smart control of two air conditioners without any
additional items.
•Remote Mounting
SWITCH
TRANSFER
•UL Listed
•Auto/Off/Manual switch
•Utility voltage sensing
•Generator voltage sensing
•Utility interrupt delay
•Engine warm-up
•Engine cool-down
•Programmable seven day exerciser
NEXUS™ CONTROLS
•Smart battery charger
•Main Line Circuit Breaker
•Electronic governor
•Weather protective enclosure
•Enclosed critical grade muffler
UNIT
•Small, compact, attractive
•SAE
Mounts near your existing distribution panel for simple, low cost installation.
For your safety.
Selects the operating mode.
Constantly monitors utility voltage, setpoints 60% dropout, 80% pick-up, of standard voltage.
Constantly monitors generator voltage to ensure the cleanest power delivered to the home.
Prevents nuisance start-ups of the engine, adjustable 10-30 seconds.
Ensures engine is ready to assume the load, setpoint approximately 5 seconds.
Allows engine to cool prior to shutdown, setpoint approximately 1 minute.
Operates engine to prevent oil seal drying and damage between power outages by running the
generator for 12 minutes every week.
Delivers charge to the battery only when needed at varying rates depending on outdoor air temperature.
Protects generator from overload.
Maintains constant 60 Hz frequency.
Ensures protection against mother nature. Hinged key locking roof panel for security.
Lift-out front for easy access to all routine maintenance items. Electrostatically applied
textured epoxy paint for added durability.
Quiet, critical grade muffler is mounted inside the unit to prevent injuries.
Makes for an easy, eye appealing installation.
Sound attenuated enclosure ensures quiet operation.
•1’ Flexible Fuel Line Connector
•Composite Mounting Pad
SYSTEM
INSTALLATION
Easy Installation.
®
SPECIFICATIONS
GENERATOR Model 005875-1 (20 kW)
Rated Maximum Continuous Power Capacity (LP) 20,000 Watts*
Rated Maximum Continuous Power Capacity (NG) 18,000 Watts*
Rated Voltage 240
Rated Maximum Continuous Load Current – 240 Volts 83.3 LP/75 NG
Total Harmonic Distortion Less than 5%
Main Line Circuit Breaker 90 Amp
Phase 1
Number of Rotor Poles 2
Rated AC Frequency 60Hz
Power Factor 1
Battery Requirement (not included) Group 26R 12 Volts and 525 Cold-cranking Amperes Minimum
Unit Weight (Pounds/Kilos) 451/204.6
Dimensions (L x W x H) Inches/mm 48 x 25 x 29 (1218 x 638 x 732)
Sound output in dB(A) at 23 ft. with generator operating at normal load 66
Sound output in dB(A) at 23 ft. with generator in Quiet-Test™ low speed exercise mode 60
ENGINE Model 005875-1 (20 kW)
Type of Engine GENERAC OHVI V-TWIN
Number of Cylinders 2
Displacement 999cc
Cylinder Block Aluminum w/Cast Iron Sleeve
Valve Arrangement Overhead Valve
Ignition System Solid-state w/Magneto
Governor System Electronic
Compression Ratio 9.5:1
Starter 12 Vdc
Oil Capacity Including Filter Approx. 1.9 Qts./1.8L
Operating RPM 3,600
Fuel Consumption
Natural Gas cu.ft./hr.
1/2 Load
Full Load
Liquid Propane ft3/hr (gal/hr) [Liter/hr]
1/2 Load
Full Load
Required fuel pressure to generator fuel inlet at all load ranges - 5 to 7 inches of water column for natural gas, 10 to 12 inches of water column for LP gas
For Btu content, multiply ft3/hr x 2520 (LP) or ft3/hr x 1000 (NG)
CONTROLS
2-Line Plain Text LCD Display Simple user interface for ease of operation.
Mode Switch
-Auto Automatic Start on Utility failure. 7 day exerciser.
-Off Stops unit. Power is removed. Control and charger still operate.
-Manual/Test (start) Start with starter control, unit stays on. If utility fails, transfer to load takes place.
Programmable start delay between 10-30 seconds Standard
Engine Start Sequence Cyclic cranking: 16 sec. on, 7 rest (90 sec. maximum duration).
Engine Warm-up 5 seconds
Engine Cool-Down 1 minute
Starter Lock-out Starter cannot re-engage until 5 sec. after engine has stopped.
Smart Battery Charger Standard
Automatic Voltage Regulation with Over and Under Voltage Protection Standard
Automatic Low Oil Pressure Shutdown Standard
Overspeed Shutdown Standard, 72Hz
High Temperature Shutdown Standard
Overcrank Protection Standard
Safety Fused Standard
Failure to Transfer Protection Standard
Low Battery Protection Standard
50 Event Run Log Standard
Future Set Capable Exerciser Standard
Incorrect Wiring Protection Standard
Internal Fault Protection Standard
Common External Fault Capability Standard
Rating definitions - Standby: Applicable for supplying emergency power for the duration of the utility power outage. No overload capability is available for this rating. (All ratings in accordance with BS5514,
ISO3046 and DIN6271). * Maximum wattage and current are subject to and limited by such factors as fuel Btu content, ambient temperature, altitude, engine power and condition, etc. Maximum power
decreases about 3.5 percent for each 1,000 feet above sea level. Sound output ratings from certain points on the generator subject to change based on installation parameters.
206
294
69 (1.89) [7.15]
106 (2.90) [10.98]
TRANSFER
SWITCH
8KW - 17KW
(IF SUPPLIED)
TRANSFER
SWITCH
20KW
(IF SUPPLIED)
H1
W1
W2
H2
H1
W1
W2
Generac® Guardian® Series Standby Generator - 20 kW
®
TRANSFER SWITCH Model 005875-1
No. of Poles 2
Current Rating (amps) 200
Voltage Rating (VAC) 250
Utility Voltage Monitor (fixed)
-Pick-up
-Dropout
Return to Utility approx. 13 sec.
Exerciser weekly for 12 minutes Standard
UL Listed Standard
Enclosure Type NEMA 3R
Withstand Rating (Amps) 10,000
Lug Range 400MCM - #4
W1
H2
80%
60%
H1
Transfer Switch Features
• Includes Digital Load Management technology standard (DLM).
• Intelligently manages two air conditioner loads with no additional hardware.
• Up to four more large (240V) loads can be managed when used in
conjunction with DLM modules.
• Electrically operated, mechanically-held contacts for fast, clean
connections.
• Rated for all classes of load, 100% equipment rated, both inductive and
resistive.
• Dual coil design.
• Service Rated.
• NEMA 3R aluminum outdoor enclosure.
• Main contacts are silver plated or silver alloy to resist welding and sticking.
200 Amps 120/240, 1ø
Open Transition Service Rated
Height Width
H1 H2 W1 W2
Inches 27.24 30.0 11.4 13.5 7.09
mm 692.0 762.4 289.0 343.0 180.0
Depth
DEPTH
Design and specifications subject to change without notice. Dimensions shown are approximate. Contact your Generac dealer for certified drawings. DO NOT USE THESE DIMENSIONS FOR INSTALLATION PURPOSES.
W2
637.6
[25.1]
1218
[47.9]
731.9
[28.8]
642
[25.3]
LEFT SIDE VIEW
76.2 [3.0]
PEA GRAVEL
MINIMUM
1226
[48.3]
FRONT VIEW
®
AVAILABLE ACCESSORIES
Model # Product Description
5819 26R Wet Cell Battery
Every standby generator requires a battery to start the system. Generac offers the
recommended 26R wet cell battery for use with all air-cooled standby product.
If the temperature regularly falls below 32° F, install a cold weather kit to maintain
6212 Cold Weather Kit
optimal battery temperature. Kit consists of battery warmer with thermostat built
into the wrap.
5621
Auxiliary Transfer Switch
Contact Kit
The auxiliary transfer switch contact kit allows the transfer switch to lock out a
single large electrical load you may not need.
5704 Paint Kit Medium Gray Kit
5665 Scheduled Maintenance Kit
Generac's scheduled maintenance kits provide all the hardware necessary to
perform complete routine maintenance on a Generac automatic standby generator.
Completely wireless and battery powered, Generac's Nexus wireless remote monitor
5928 Nexus Wireless Remote
provides you with instant status information without ever leaving the house. Not
compatible with CorePower or EcoGen systems.
Remotely control generator functions with the advanced model's LCD display. In
addition to remote testing of the generator, set the excercise cycle and maintenance
interval reminders. Not compatible with CorePower or EcoGen systems.
5951
Advanced Nexus Wireless
Remote
5937
DLM Load Control Module
(50 Amps)
DLM Modules are used in conjunction with the Nexus Smart Switch to increase
its load management capabilities. It gives the Nexus Smart Switch additional load
management flexibility not found in any other transfer switch.
Generac Power Systems, Inc. • S45 W29290 HWY. 59, Waukesha, WI 53189 • generac.com
©2012 Generac Power Systems, Inc. All rights reserved. All specifications are subject to change without notice. Bulletin 0186160SBY-J Printed in U.S.A. 10/15/12
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