Generac Power Systems 04679-1 Installation And Owner'S Manual Download Page 8

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Generac

Power Systems, Inc.

Section 1 — General Information

Air-cooled 7 kW Generator

1.5 SPECIFICATIONS

1.5.1 GENERATOR

Rated Max. Continuous Power Capacity (Watts*) ......6,000
NG/7,000 LP
Rated Voltage ........................................................120/240
Rated Max. Continuous Load Current (Amps)

120 Volts ..............................................50.0 NG/58.3 LP
240 Volts ..............................................25.0 NG/29.2 LP

Main Line Circuit Breaker ....................................30 Amp
Phase ..............................................................................1
Number of Rotor Poles ....................................................2
Rated AC Frequency ................................................60 Hz
Power Factor....................................................................1
Recommended Air Filter ................Generac Part # C8127
Battery Requirement ....................Group 26/26R 12 Volts

and 350 Cold-cranking
Amperes Minimum

Weight ............................................................452 Pounds

* 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;
and also will decrease about 1 percent for each 12° C (10° F) above 15.5° C (60° F).

1.5.2 ENGINE

Type of Engine ......................................................GH-410
Number of Cylinders ......................................................1
Rated Horsepower ................................14.5 @ 3,600 rpm
Displacement............................................................410cc
Cylinder Block ....................Aluminum w/Cast Iron Sleeve
Valve Arrangement ..................................Overhead Valves
Ignition System ..............................Solid-state w/Magneto
Recommended Spark Plug ..................................RC12YC
Spark Plug Gap ..............................0.76 mm (0.030 inch)
Compression Ratio ....................................................8.6:1
Starter ....................................................................12 Vdc
Oil Capacity Including Filter ....................Approx. 1.5 Qts
Recommended Oil Filter ................Generac Part # 70185
Recommended Air Filter ..............Generac Part # 0C8127
Operating RPM ........................................................3,600

1.6

FUEL REQUIREMENTS
AND RECOMMENDATIONS

With LP gas, use only the vapor withdrawal
system.

This type of system uses the vapors formed

above the liquid fuel in the storage tank.

The engine has been fitted with a fuel carburetion
system that meets the specifications of the 1997
California Air Resources Board for tamper-proof dual
fuel systems. The unit will run on natural gas or LP
gas, but it has been factory set to run on natural gas.
Should the primary fuel need to be changed to LP
gas, the fuel system needs to be reconfigured. See
Section 1.8 for instructions on reconfiguration of the
fuel system.

Recommended fuels should have a Btu content of at
least 1,000 Btus per cubic foot for natural gas; or at
least 2,520 Btus per cubic foot for LP gas. Ask the
fuel supplier for the Btu content of the fuel.

Fuel pressure supplied to the generator for both nat-
ural gas and liquid propane set ups should be

inches to 14 inches of water column (0.6 psi)

at all

load ranges.

NOTE:

A separate gas line and regulator may be needed
to assure proper gas pressure (11-14”) to the gen-
erator. Low gas pressure can cause hard starting
and could affect engine durability.

1.7

FUEL CONSUMPTION

*Natural gas is in cubic feet per hour.
**LP is in gallons per hour/cubic feet per hour.

Gaseous fuels such as natural gas and liquid
propane (LP) gas are highly explosive. Even the
slightest spark can ignite such fuels and cause
an explosion. No leakage of fuel is permitted.
Natural gas, which is lighter than air, tends to
collect in high areas. LP gas is heavier than air
and tends to settle in low areas.

1.8

RECONFIGURING THE
FUEL SYSTEM

1.8.1 7 KW

To reconfigure the fuel system from NG to LP,
follow these steps:

1. Turn the main gas supply off.
2. Remove the carburetor fuel hose from the outlet

port of the demand regulator (Figure 1.3).

3. Disconnect wire #0 and wire #14 from the gas

solenoid located on the top of the demand regu-
lator.

4. Remove the demand regulator by rotating coun-

terclockwise.

5. Remove the brass hose fitting from the outlet port

of the demand regulator.