Generac QT070 User Manual

GENERAC®STANDBY GENERATORS

70 kW

Liquid-Cooled Engine Generator Sets

INCLUDES:

• Generac Naturally Aspirated
Gaseous Fueled 6.8L Engine

• Two Line LCD Tri-lingual

Digital Nexus™ Controller

• Sound Attenuated Enclosure

• Isochronous Electronic Governor

• 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 QT070 (Bisque) - 70 kW 60Hz

Meets 2010 EPA Emission Regulations
Meets CA/MA emissions requirement 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

QT070

GENERATOR SPECIFICATIONS

TYPE Synchronous

ROTOR INSULATION Class H

STATOR INSULATION Class H

TELEPHONE INTERFERENCE FACTOR (TIF) <50

ALTERNATOR OUTPUT LEADS 3-PHASE/1-PHASE 6/4 wire

BEARINGS Sealed Ball

COUPLING Flexible Disc

LOAD CAPACITY (STANDBY RATING) 70 kW

EXCITATION SYSTEM Brushless

VOLTAGE REGULATION

TYPE Full Digital

SENSING Three Phase

REGULATION ± 1%

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 130 °C rise
All models are fully prototyped tested

ENCLOSURE FEATURES

Aluminum all weather

protective enclosure
options available

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 V-type

CYLINDERS 10

DISPLACEMENT 6.8 Liter

BORE 3.55

STROKE 4.17

COMPRESSION RATIO 9:1

INTAKE AIR SYSTEM Naturally Aspirated

LIFTER TYPE 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 5 Quarts

ENGINE COOLING SYSTEM

TYPE Closed

WATER PUMP Belt driven

FAN SPEED 2300

FAN DIAMETER 22 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 11” - 14” H

O

2

ELECTRICAL SYSTEM

BATTERY CHARGE ALTERNATOR 12V 30 Amp

SMART BATTERY CHARGER 12V, 2 Amp

RECOMMENDED BATTERY Group 24F, 12V, 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).