Series
®
Quietsource®
Series
INCLUDES:
• Two Line LCD Tri-Lingual Digital Nexus™
Controller
• Isochronous Electronic Governor
• Sound Attenuated Enclosure
• Closed Coolant Recovery System
• Smart Battery Charger
• UV/Ozone Resistant Hoses
• ±1% Voltage Regulation
• Natural Gas or LP Operation
• 2 Year Limited Warranty
®
QUIETSOURCE
SERIES
Standby Generators
Liquid-Cooled Gas Engine
Standby Power Rating
Model QT022 (Aluminum - Gray) - 22 kW 60Hz
Model QT027 (Aluminum - Gray) - 27 kW 60Hz
Model QT036 (Aluminum - Gray) - 36 kW 60Hz
Model QT048 (Aluminum - Gray) - 48 kW 60Hz
Quietsource
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• 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.
¡ TEST CRITERIA:
PROTOTYPE TESTED NEMA MG1-22 EVALUATION
SYSTEM TORSIONAL TESTED MOTOR STARTING ABILITY
Meets EPA Emission Regulations
22 & 27kW are CA/MA emissions compliant
48kW meets CA/MA emissions requirements with optional catalyst
36kW not for sale in CA/MA
¡ 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.
Series
®
22 • 27 • 36 • 48 kW application & engineering data
GENERATOR SPECIFICATIONS
Type Synchronous
Quietsource
Rotor Insulation Class
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Stator Insulation Class H
Telephone Interference Factor (TIF) <50
Alternator Output Leads 1-Phase 4 wire
Alternator Output Leads 3-Phase 6 wire
Bearings Sealed Ball
Coupling Flexible Disc
Excitation System Direct
VOLTAGE REGULATION
Type Electronic
Sensing Single Phase
Regulation ± 1%
GOVERNOR SPECIFICATIONS
Type Electronic
Frequency Regulation Isochronous
Steady State Regulation ± 0.25%
ELECTRICAL SYSTEM
Battery Charge Alternator 12 Volt 30 Amp
Static Battery Charger 2 Amp
Recommended Battery
System Voltage 12 Volts
GENERATOR FEATURES
Revolving field heavy duty generator
Directly connected to the engine
Operating temperature rise 120 °C above a 40 °C ambient
Class H insulation is rated at 150 °C rise at 25 °C ambient
Class F insulation is rated at 145 °C rise at 25 °C ambient
All models fully prototyped tested
ENCLOSURE FEATURES
Aluminum weather
protective enclosure
Enclosed critical grade
muffler
Small, compact, attractive Makes for an easy, eye appealing installation.
SAE Sound attenuated enclosure ensures quiet operation.
H (22 & 27 kW) or
F (36 & 48 kW)
Group 26 (22, 27 & 36 kW)
or Group 24F (48 kW), 525CCA
Ensures protection against mother nature.
Electrostatically applied textured epoxy paint for added
durability.
Quiet, critical grade muffler is mounted inside the unit
to prevent injuries.
ENGINE SPECIFICATIONS: 22, 27 & 36kW
Make Generac
Model In-line
Cylinders 4
Displacement (Liters) 2.4
Bore (in/mm) 3.41/86.5
Stroke (in/mm) 3.94/100
Compression Ratio 9.5:1
Intake Air System
Lifter Type Hydraulic
Naturally Aspirated (22 & 27 kW) or
Turbocharged/Aftercooled (36 kW)
ENGINE SPECIFICATIONS: 48kW
Make Generac
Model V-Type
Cylinders 8
Displacement (Liters) 5.4
Bore (in/mm) 3.55/90.2
Stroke (in/mm) 4.17/105.9
Compression Ratio 9:1
Intake Air System Naturally Aspirated
Lifter Type Hydraulic
ENGINE LUBRICATION SYSTEM
Oil Pump Type Gear
Oil Filter Type Full flow spin-on cartridge
Crankcase Capacity (quarts/liters)
4/3.8 (22, 27 & 36 kW) or
6/5.7 (48 kW)
ENGINE COOLING SYSTEM
Type Closed
Water Pump Belt driven
1980 - 22 & 27 kW
Fan Speed (rpm)
Fan Diameter (in/mm)
Fan Mode
18.1/459.7 (22 & 27 kW) or
1500 - 36 kW
1954 - 48 kW
22/558.8 (36 & 48 kW)
Pusher (22 & 27 kW) or
Puller (36 & 48 kW)
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
(All ratings in accordance with BS5514, ISO3046, ISO8528, SAE J1349 and DIN6271)
22 • 27 • 36 • 48 kW operating data
GENERATOR OUTPUT VOLTAGE/kW - 60Hz
kW LPG Amp LPG kW Nat. Gas Amp Nat. Gas CB Size (Both)
120/240 V, 1Ø, 1.0 pf 22 92 22 92 100
QT022
QT027
QT036
QT048
120/208 V, 3Ø, 0.8 pf 22 76 22 76 80
120/240 V, 3Ø, 0.8 pf 22 66 22 66 80
120/240 V, 1Ø, 1.0 pf 27 113 25 104 125
120/208 V, 3Ø, 0.8 pf 27 94 25 87 100
120/240 V, 3Ø, 0.8 pf 27 81 25 75 90
120/240 V, 1Ø, 1.0 pf 36 150 35 146 175
120/208 V, 3Ø, 0.8 pf 36 125 35 121 150
120/240 V, 3Ø, 0.8 pf 36 108 35 105 125
277/480 V, 3Ø, 0.8 pf 36 54 35 53 60
120/240 V, 1Ø, 1.0 pf 48 200 48 200 200
120/208 V, 3Ø, 0.8 pf 48 166.5 48 166 175
120/240 V, 3Ø, 0.8 pf 48 144 48 144 150
277/480 V, 3Ø, 0.8 pf 48 72 48 72 80
Series
®
Quietsource
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SURGE CAPACITY IN AMPS
Voltage Dip @ < .4 pf
15% 30%
120/240 V, 1Ø 89 216
QT022
QT027
QT036
QT048
Note: Fuel pipe must be sized for full load.
For Btu content, multiply ft3/hr x 2520 (LP) or ft3/hr x 1000 (NG)
For megajoule content, multiple m³/hr x 93.89 (LP) or m³/hr x 37.26 (NG)
Refer to "Emissions Data Sheets" for maximum fuel flow for EPA and SCAQMD permitting purposes.
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.
120/208 V, 3Ø 74 180
120/240 V, 3Ø 64 156
120/240 V, 1Ø 109 265
120/208 V, 3Ø 91 221
120/240 V, 3Ø 79 192
120/240 V, 1Ø 54 149
120/208 V, 3Ø 87 210
120/240 V, 3Ø 75 182
277/480 V, 3Ø 36 87
120/240 V, 1Ø 69 189
120/208 V, 3Ø 111 269
120/240 V, 3Ø 96 233
277/480 V, 3Ø 43 104
ENGINE FUEL CONSUMPTION
Exercise cycle 42 1.2 0.44 1.7
25% of rated load 100 2.8 1.1 4.2
QT022
QT027
QT036
QT048
50% of rated load 190 5.4 2.1 7.8
75% of rated load 255 7.2 2.8 10.5
100% of rated load 316 9 3.4 13
Exercise cycle 42 1.2 0.44 1.7
25% of rated load 108 3.1 1.2 4.5
50% of rated load 197 5.6 2.1 8.1
75% of rated load 287 8.2 3.1 11.8
100% of rated load 359 10.2 3.9 14.8
Exercise cycle 48 1.4 0.5 2
25% of rated load 156 4.4 1.7 6.4
50% of rated load 282 8 3.1 11.6
75% of rated load 392 11.1 4.3 16.2
100% of rated load 503 14.3 5.5 20.8
Exercise cycle 95 2.7 1 3.9
25% of rated load 204 5.8 2.16 8.5
50% of rated load 392 11.1 4.14 15.7
75% of rated load 547 15.5 5.8 22.8
100% of rated load 756 21.5 7.96 31.3
Natural Gas Propane
(ft3/hr) (m³/hr) (gal/hr) (l/hr)
Series
®
22 • 27 • 36 • 48 kW operating data
ENGINE COOLING
Air flow (inlet air including alternator and combustion air in cfm/cmm) 2400/68 2400/68 2200/62.3 4350/123.2
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System coolant capacity (gal/liters) 3/11.4 3/11.4 2.5/9.5 3/11.4
Heat rejection to coolant (BTU per hr/MJ per hr) 99,000/104.5 105,000/110.8 145,000/153 186,000/196.2
Maximum operation air temperature on radiator (°C/°F) 60/150
Maximum ambient temperature (°C/°F) 50/140
COMBUSTION REQUIREMENTS
Flow at rated power (cfm/cmm) 68/1.9 68/1.9 106/3 163/4.6
SOUND EMISSIONS
Sound output in dB(A) at 23 ft (7 m) with generator in exercise mode* 61 61 58 63
Sound output in dB(A) at 23 ft (7 m) with generator operating at normal load* 70 70 64 68
*Sound levels are taken from the front of the generator. Sound levels taken from other sides of the generator may be higher depending on installation parameters.
EXHAUST
Exhaust flow at rated output (cfm/cmm) 165/4.7 180/5.1 300/8.5 414/11.7
Exhaust temperature at muffler outlet (°C/°F) 482/900 538/1000 579/1075 552/1025
22 kW 27 kW 36 kW 48 kW
ENGINE PARAMETERS
Rated Synchronous RPM 1800
POWER ADJUSTMENT FOR AMBIENT CONDITIONS
Temperature Deration ...........................................................................................................3% for every 10 °C above 25 °C or 1.65% for every 10 °F above 77 °F
Altitude Deration (22, 27 & 48 kW) .....................................................................................1% for every 100 m above 183 m or 3% for every 1000 ft above 600 ft
Altitude Deration (36 kW) ................................................................................................ 1% for every 100 m above 915 m or 3% for every 1000 ft above 3000 ft
CONTROLLER FEATURES
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 ......................................................................................... 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 sec
Engine Cool-Down ..................................................................................................................................................................................................................1 min
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, 72 Hz
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
Governor Failure Protection ................................................................................................................................................................................................ Standard
22 • 27 • 36 • 48 kW available accessories
Model # Product Description
Series
®
005630-0 - 22, 27 & 36 kW
005632-0 - 48 kW
005616-0 - 22, 27 &36 kW
006204-0 - 48 kW
005621-0
005651-0 Base Plug Kit Add base plugs to the base of the generator to keep out debris.
005704-0 Paint Kit
005656-0 - 22 & 27 kW
005984-0 - 36 kW
006205-0 - 48 kW
005928-0 Wireless Remote
Cold Weather Kit
Extreme Cold Weather Kit
Auxiliary Transfer Switch
Contact Kit
Scheduled Maintenance Kit
If the temperature regularly falls below 32 °F (0 °C), install a cold weather
kit to maintain optimal battery temperature. Kit consists of battery warmer
with thermostat built into the wrap.
Recommended where the temperature regularly falls below 32 °F (0 °C) for
extended periods of time. For liquid cooled units only.
The auxiliary transfer switch contact kit allows the transfer switch to lock
out a single large electrical load you may not need.
If the generator enclosure is scratched or damaged, it is important to touchup the paint to protect from future corrosion. The paint kit includes the
necessary paint to properly maintain or touch-up a generator enclosure.
The Liquid-Cooled Scheduled Maintenance Kits offer all the hardware
necessary to perform complete maintenance on Generac liquid-cooled
generators.
Completely wireless and battery powered, Generac's wireless remote
monitor provides you with instant status information without ever leaving
the house.
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005951-0 Advanced Wireless Remote
006199-0 PMM Starter Kit
006186-0
006463-0 Mobile Link™
006478-0 Harness Adapter Kit
Power Management
Module (50 Amps)
Remotely control generator functions with the advanced model's LCD
display. In addition to remote testing of the generator, set the exercise cycle
and maintenance interval reminders.
The PMM Starter Kit consists of a 24 VAC, field installed transformer that
enables the use of the 24 VAC Power Management Modules (PMMs) and
one PMM. The standard controller (without starter kit) can control two
HVAC loads with no additional hardware. Not compatible with pre-wired
switches.
Power Management Modules are used in conjunction with the Smart Switch
to increase its power management capabilities. It gives the Smart Switch
additional power management flexibility not found in any other transfer
switch. Not compatible with pre-wired switches. Note: PMM Starter Kit
required.
Generac's Mobile Link allows you to check the status of your generator
from anywhere that you have access to an Internet connection from a
PC or with any smart device. You will even be notified when a change in
the generator’s status occurs via e-mail or text message. Note: Harness
Adapter Kit required.
The Harness Adapter Kit is required to make liquid-cooled units compatible
with Mobile Link™.
Series
®
22 • 27 • 36 • 48 kW interconnections
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RTS TRANSFER SWITCH
0 GROUND
T1
15B +12V
23 TRANSFER
N2
N1
NEUTRAL
CONTACTOR1CONTACTOR2CONTACTOR3CONTACTOR
AIR 1
AIR 2
UTILITY
(C1 & VR1)
4
PRIORITY 1
PRIORITY 2
PRIORITY 3
PRIORITY 4
LOAD SHED
N1 N2
MODULE
48850-T
E2E1
T1 T2
STANDBY
(C2 & VR2)
0
23
194
+12VDC
TRANSFER
DC COMMON
CUSTOMER CONNECTIONS
0
23
194
T1
N2N1
WARNING
NOTE WIRE ORIENTATION
T2
E2
E1
T1
CENTER
PROTECTED LOAD
NEUTRAL BLOCK
GROUND
CUSTOMER SUPPLIED
NEUTRAL WIRE
FEEDER SUPPLY FROM PANEL
(REQUIRES 4-WIRE FEEDER)
ON
NEU
T1/LINE
N2
CONNECTION PANEL
N1
LIQUID-COOLED GENERATOR
A TYPICAL RESIDENTIAL/COMMERCIAL
T1
N2
N1
NEUTRAL BLOCK
178
183
23
194
E1 E2
NEUT
0
23
194
GROUND
LIQUID COOLED INSTALLATION
Note: Use the generator's specific installation manual
and wiring diagrams to verify generator wiring
connections, as they may differ slightly from illustration.
NOTE:
MATCH WIRE
NUMBERS TO
TERMINAL NUMBERS
22 & 27 kW installation layout
Series
®
Quietsource
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Series
®
36 kW installation layout
Quietsource
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48 kW installation layout
Series
®
Quietsource
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Generac Power Systems, Inc. • S45 W29290 HWY. 59, Waukesha, WI 53189 • generac.com
©2013 Generac Power Systems, Inc. All rights reserved. All specifications are subject to change without notice. Bulletin 0199360SBY-B Printed in U.S.A. 07/30/13
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