Standby Power Rating 22 kW 60 Hz
Standby Power Rating
22 kW 60 Hz
Liquid Cooled
Gas Engine
Generator Sets
Model Number: 05638 (Gray - Aluminum)
Whisper-Test™
Low Speed Exercise
61 dB(A) at 23 feet
GENERAC 2.4L ENGINE
Naturally Aspirated
Gaseous Fueled
UL 2200 Listed
Transfer Switch is sold separately
STANDARD EQUIPMENT
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All input connections in one single area
High coolant temperature shutdown
Low oil pressure shutdown
Low coolant level automatic shutdown
Overspeed automatic shutdown
Crank timer
Exercise timer
Oil drain extension
Cool flow radiator
Closed coolant recovery system
UV/Ozone resistant hoses
Watertight state of the art electrical connectors
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Mainline circuit breaker
Radiator drain extension
Battery charge alternator
2 Amp static battery charger
Battery cables
Battery rack
Fan and belt guards
Isochronous governor
Flex fuel line
Hour meter
FEATURES
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Innovative design and fully prototype tested
UL2200 Listed
Solid state frequency compensated
voltage regulator
Dynamic and static battery charger
Sound attenuated acoustically designed enclosure
Whisper-Test™ for feature low noise level exercise
Acoustically designed engine cooling system
High flow low noise factory engineered exhaust system
State of the art digital control system with R-Series digital
control panel
• Watertight electrical connectors
• Rodent proof construction
• High efficiency, low distortion Generac designed
alternator
• Vibration isolated from mounting base
• Matching Generac transfer switches engineered and
tested to work as a system
• All components easily accessible for maintenance
• Electrostatically applied powder paint
APPLICATION
& ENGINEERING DATA
Standby 22 kW
GENERATOR SPECIFICATIONS
ENGINE SPECIFICATIONS
TYPE............................................................................................................Synchronous
ROTOR INSULATION...........................................................................................Class H
STATOR INSULATION..........................................................................................Class H
TOTAL HARMONIC DISTORTION............................................................................ <5%
TELEPHONE INTERFERENCE FACTOR (TIF).........................................................<50
ALTERNATOR OUTPUT LEADS 3 PHASE............................................................ 4 wire
BEARINGS..................................................................................................... Sealed Ball
COUPLING................................................................................................... Flexible Disc
LOAD CAPACITY (STANDBY RATING)................................................................. 22 kW
EXCITATION SYSTEM............................................................................................ Direct
MAKE................................................................................................................. Generac
MODEL..................................................................................................................Inline 4
CYLINDERS....................................................................................................................4
DISPLACEMENT..................................................................................................2.4 Liter
BORE.........................................................................................................................3.41
STROKE.....................................................................................................................3.94
COMPRESSION RATIO............................................................................................8.5:1
INTAKE AIR SYSTEM........................................................................ Naturally Aspirated
VALVE SEATS...................................................................................................Hardened
LIFTER TYPE.....................................................................................................Hydraulic
NOTE: Generator rating and performance in accordance with
ISO8528-5, BS5514, SAE J1349, ISO3046, and DIN6271 standards.
VOLTAGE REGULATOR
TYPE.................................................................................................................Electronic
SENSING.................................................................................................... Single Phase
REGULATION........................................................................................................... ± 1%
FEATURES................................................................................................ V/F Adjustable
Adjustable Voltage and Gain
LED Indicators
GENERATOR FEATURES

Revolving field heavy duty generator

Directly connected to the engine

Operating temperature rise 120 °C above a 40 °C ambient

Insulation is Class H rated at 150 °C rise

All models are fully prototyped tested
CONTROL PANEL FEATURES

SEVEN LED INDICATOR LIGHTS
 ADDITIONAL FUNCTIONS
•System ready
•Utility sensing
•Low fuel pressure
•Delay on utility failure for engine start
•Low battery
•Engine warm-up before transfer
•Low oil pressure
•Delay to retransfer to utility
•High coolant temp/low coolant temp
•Engine cooldown timer
•Overspeed
•Exerciser not set
•Overcrank
•Hour meter

INTERNAL FUNCTIONS:
•3 position switch (auto, off and manual)
•2 wire start for any transfer switch
•Communicates with the Generac RTS transfer switch
•Built-in 7 day exerciser
•Selectable engine speed at exercise
•Governor controller is built into the master control board
•Temperature range -40 °C to 70 °C
GOVERNOR SPECIFICATIONS
TYPE.................................................................................................................Electronic
FREQUENCY REGULATION........................................................................ Isochronous
STEADY STATE REGULATION...............................................................................± 0.25
ADJUSTMENTS FOR:
Speed......................................................................................................Yes
Droop.......................................................................................................Yes
ENGINE LUBRICATION SYSTEM
OIL PUMP.................................................................................................................Gear
OIL FILTER.............................................................................. Full flow spin-on cartridge
CRANKCASE CAPACITY....................................................................................4 Quarts
ENGINE COOLING SYSTEM
TYPE......................................................................................................................Closed
WATER PUMP..................................................................................................Belt driven
FAN SPEED..............................................................................................................1980
FAN DIAMETER........................................................................................... 17.75 inches
FAN MODE............................................................................................................ Pusher
FUEL SYSTEM
FUEL TYPE...........................................................................Natural gas, propane vapor
CARBURETOR...............................................................................................Down Draft
SECONDARY FUEL REGULATOR.................................................................... Standard
FUEL SHUT OFF SOLENOID........................................................................... Standard
OPERATING FUEL PRESSURE...................................................................5” - 14” H2O
ELECTRICAL SYSTEM
BATTERY CHARGE ALTERNATOR..............................................................12V 30 Amp
STATIC BATTERY CHARGER............................................................................... 2 Amp
RECOMMENDED BATTERY............................................................Group 26, 525 CCA
SYSTEM VOLTAGE.............................................................................................. 12 Volts
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 S5514,
ISO3046, ISO8528 and DIN6271).
Standby 22 kW
OPERATING DATA
KW RATING
STANDBY 22 kW
22
ENGINE SIZE
2.4 Liter 4 cyl. inline
GENERATOR OUTPUT VOLTAGE/KW - 60Hz
120/240V, single phase, 1.0 pf
GENERATOR LOCKED ROTOR KVA
AVAILABLE @ VOLTAGE DIP OF 35%
KW
22
single phase
ENGINE FUEL CONSUMPTION (Natural Gas) (Propane)
Exercise cycle
25% of rated load
50% of rated load
75% of rated load
100% of rated load
ENGINE COOLING
Air flow (inlet air including alternator and combustion air)ft3/min.
System coolant capacity
US gal.
Heat rejection to coolant
BTU/hr.
Max. operating air temp. on radiator
°C (°F)
Max. ambient temperature
°C (°F)
COMBUSTION AIR REQUIREMENTS
Flow at rated power 60 Hz
SOUND EMISSIONS IN DBA
db(A) @ 23 feet in exercise mode
db(A) @ 23 feet at normal operating load
EXHAUST
Exhaust flow at rated output 60 Hz
Exhaust temp. at muffler outlet
ENGINE PARAMETERS
Rated synchronous RPM
HP at rated KW
AMP
92
43
Natural Gas
(ft3/hr.)
42
100
190
255
316
Propane (gal/hr.)
cu ft/hr
0.44
16
1.0
38
2.0
98
2.7
98
3.3
120
2,400
2.5
99,000
60 (150)
50 (140)
cfm
68
61
70
cfm
°F
165
900
60 Hz
60 Hz
1800
40
POWER ADJUSTMENT FOR AMBIENT CONDITIONS
Temperature Deration 3% for every 10 °C above - °C
1.65% for every 10 °F above - °F
25
77
Altitude Deration
183
600
ENCLOSURE
Material
Color
1% for every 100 m above - m
3% for every 1000 ft. above - ft.
CB Size
125
Aluminum
PMS 422 (Bisque)
RATING:
All three phases units are rated at 0.8 power factor. All single phase units are rated at 1.0 power factor. STANDBY RATING: Standby ratings apply to installations served by
a reliable utility source. The standby rating is applicable to varying loads for the duration of a power outage. There is no overload capability for this rating. Ratings are in accordance
with ISO-3046-1. Design and specifications are subject to change without notice. Maximum wattage and current are subject to and limited by such factors as fuelBtu content, ambient
temperature, altitude, engine power and condition, etc.
INTERCONNECTIONS
Standby 22 kW
22
22
240 1 Ø
208 3 Ø
125
100
#2 to 1/0
#4 to 1/0
Installation Drawing Ref. No. 0G0325
INSTALLATION LAYOUT
62.2
46.02
DOOR TYP
28.98
AUTO
SET
EXERCISE
TIME
OFF
QUARTZ
OFF
ON
HOURS
1/10
MANUAL
OVER CRANK
OVER SPEED
LOW COOLANT LEVEL
HI COOLANT TEMPERATURE
LOW OIL PRESSURE
LOW BATTERY
LOW FUEL PRESSURE
SYSTEM READY
FUSES
LOCATED
INSIDE
DANGER
High voltage.
Contact with terminals
may result in personal
injury or death.
33.5
SEE INSTALL DWG 0G9370 FOR DETAILS
FRONT VIEW
WEIGHT: 895 lbs.
Generac Power Systems, Inc. • P.O. Box 8, Waukesha, WI 53187 • generac.com
©2008 Generac Power Systems, Inc. All rights reserved. All specifications are subject to change without notice. Bulletin 0178340SBY/Printed in U.S.A. 06.08, rev. 06.08
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