Fuel Consumption; Reconfiguring The Fuel System For Lp Vapor; Engine Oil Recommendations - Generac Power Systems QuietSource 005031-2 Owner's Manual

1.10.2 GENERATOR
Model
Rated Max. Cont.
AC Power Output (kW)
Rated voltage (volts)
No. of Rotor Poles
Driven Speed of Rotor
Rotor Excitation System
Type of Stator
Rotor/Stator Insulation
* Rated power of generator is subject to and limited by such
factors as ambient temperature, altitude, engine condition,
and other factors. Engine power will decrease about 3.5%
for each 1000 feet above sea level and will decrease an addi-
tional 1% for each 10°F above 60°F . Maximum output power
of the generator is limited by maximum engine power.

1.11 FUEL CONSUMPTION

25 kW Models
Using Natural Gas ........................................ 441 cu. ft. per hour
Using LP Gas ............................. 175 cubic ft.(4.8 gal.) per hour
Fuel consumption is given at rated maximum
continuous power output when using natural gas
rated at 1000 Btu per cubic foot; or LP gas rated
2520 Btu per cubic foot. Actual fuel consumption
obtained may vary depending on such variables as
applied load, ambient temperature, engine condi-
tions and other environmental factors.
Fuel pressure for a natural gas set up should be five
inches to 14 inches of water column (0.18 to 0.5
psi) at all load ranges.
Fuel pressure for an LP vapor set up should be 11
inches to 14 inches of water column (0.4 to 0.5
psi) at all load ranges.
1.12 RECONFIGURING THE FUEL
SYSTEM FOR LP VAPOR
All models are configured for natural gas (NG)
from the factory.
To reconfigure the fuel system from NG to LP vapor,
follow these steps:
1. Turn the main gas supply off.
2. Remove the carburetor fuel hose from the outlet
port (Port 1) of the demand regulator (Figure
1.8).
3. Remove the brass hose fitting from the outlet port
(Port 1) of the demand regulator.
Single-phase
005031-2
25
120/240
4
1800
Direct excited brush type
4 Wire
Class F/H
NOTE:
NOTE:
Section 1 — General Information
Liquid-cooled 25 kW Generators
4. Remove pipe plug from Port 2.
5. Install brass hose fitting into Port 2.
6. Install pipe plug into Port 1.
7. Connect carburetor gas hose to brass fitting.
8. Tighten all clamps and plugs.
9. Make sure fuel supply is of the proper pressure
and type for configuration (not to exceed 14 inch-
es water column).
10. Move DIP switch position 4 on the control board
to the off position (LP vapor, see Figure 3.2 and
Section 3.8).
11. Reverse the procedure to convert back to natural
gas.
Figure 1.8 — Reconfigure the Fuel System
Port 1
PLUG
NG FUEL SYSTEM
Port 1 is for NG only and Port 2 is for LP vapor
only. No provision for dual fuel has been made.

Serious injury or damage may occur if not con-
figured properly. Please consult an Authorized
Service Dealer with any questions.

1.13 ENGINE OIL RECOMMENDATIONS

The unit has been filled with 15W-40 engine oil at
the factory. Use a high-quality detergent oil classified
"For Service CC, SD, SE, SF ." Detergent oils keep the
engine cleaner and reduce carbon deposits. Use oil
having the following SAE viscosity rating, based on
the ambient temperature range anticipated before the
next oil change:
Temperature
Above 80° F (27° C)
32° to 80° F (-1° to 27° C)
Below 32° F (0° C)
Port 2
FUEL HOSE FUEL HOSE
BRASS HOSE
BRASS HOSE
FITTING
FITTING
OUT
OUT
PORT 1
PORT 2
FUEL INLET
LP FUEL SYSTEM
NOTE:
DANGER
Oil Grade (Recommended)
SAE 30W or 15W-40
SAE 20W-20 or 15W-40
SAE 10W or 15W-40
PLUG
7