Generac QT04854GNAC, QT04854GNAX, QT04854JNAX, QT04854ANAC User Manual
GENERAC® QUIETSOURCE® SERIES
STANDBY GENERATORS
48 kW
Liquid-Cooled Engine Generator Sets
INCLUDES:
• Generac Naturally Aspirated
Gaseous Fueled 5.4L Engine
• 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
• UL 2200 Listed
Standby Power Rating
Model QT048 (Gray) - 48 kW 60Hz
Meets EPA Emission Regulations
CA/MA Emissions Compliant with Optional Catalyst
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
¡ 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. An
unequalled ±1% voltage regulation.
¡ 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.
Application & Engineering Data
QT048
GENERATOR SPECIFICATIONS
TYPE Synchronous
ROTOR INSULATION Class F
STATOR INSULATION Class H
TELEPHONE INTERFERENCE FACTOR (TIF) <50
ALTERNATOR OUTPUT LEADS 1-PHASE
ALTERNATOR OUTPUT LEADS 3-PHASE
BEARINGS Sealed Ball
COUPLING Flexible Disc
LOAD CAPACITY (STANDBY RATING) 48 kW
EXCITATION SYSTEM Direct
4 wire
6 wire
VOLTAGE REGULATION
TYPE Electronic
SENSING Single Phase
REGULATION ± 1%
GENERATOR FEATURES
Revolving field heavy duty generator
Directly connected to the engine
Operating temperature rise 120 °C above at 40 °C ambient
Insulation is Class F rated at 145 °C rise at 25 °C ambient
All models are fully prototyped tested
ENCLOSURE FEATURES
Aluminum weather
protective enclosure
Enclosed critical grade
muffler
Small, compact,
attractive
SAE Sound attenuated enclosure ensures quiet
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.
Makes for an easy, eye appealing installation.
operation.
ENGINE SPECIFICATIONS
MAKE Generac
MODEL V8
CYLINDERS 8
DISPLACEMENT 5.4 Liter
BORE 3.55
STROKE 4.17
COMPRESSION RATIO 9:1
INTAKE AIR SYSTEM Naturally Aspirated
LIFTER TYPE Roller, Hydraulic
GOVERNOR SPECIFICATIONS
TYPE Electronic
FREQUENCY REGULATION Isochronous
STEADY STATE REGULATION ± 0.25%
ENGINE LUBRICATION SYSTEM
OIL PUMP Gear
OIL FILTER Full flow spin-on cartridge
CRANKCASE CAPACITY 6.5 Quarts
ENGINE COOLING SYSTEM
TYPE Pressurized Closed
FAN SPEED 1954
FAN DIAMETER 22 inches
FAN MODE Puller
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 24F, 525CCA
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 BS5514,
ISO3046 and DIN6271). (All ratings in accordance with BS5514, ISO3046, ISO8528, SAE J1349 and DIN6271).
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