Generac 37kW NG, 40kW LP Specifications, Fuel Consumption, Reconfiguring the Fuel System

Section 1 — General Information

QUIETSOURCE™ 40kW Liquid-cooled Generators

1.10 SPECIFICATIONS NOTE:

‹ 1.10.1 GENERATOR SPECIFICATIONS

	Single-phase
Model	005012-0
Rated Max. Cont.	37 (NG), 40 (LP)
AC Power Output (kW)
Rated voltage (volts)	120/240
No. of Rotor Poles	4
Driven Speed of Rotor	1800
Rotor Excitation System	Direct excited brush type
Type of Stator	4 Wire
Rotor/Stator Insulation	Class F/H

Fuel consumption is given at rated maximum con- tinuous power output when using natural gas rated at 1000 Btu per cubic foot. LP gas is rated at 2520 Btu per cubic foot. Actual fuel consump- tion obtained may vary depending on such vari- ables as applied load, ambient temperature, engine conditions and other environmental fac- tors.

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.

‹1.10.2 ENGINE SPECIFICATIONS

Make	Chrysler
Displacement	3.9 liters
Cylinder Arrangement	V-6
Valve Arrangement	Overhead Valve
Firing Order	1-6-5-4-3-2
Number of Main Bearings	4
Compression Ratio	9.1 to 1
No. of Teeth on Flywheel	164
Ignition Timing at 1800 rpm	30 degrees BTDC
Spark Plug Gap	1.01mm (0.040 in.)
Recommended Spark Plugs
Champion	RC12LC4
Oil Pressure	30-80 psi
Crankcase Oil Capacity	4.0 U.S. quarts (3.8 liters)
Recommended Engine Oil	SAE 15W-40
Type of Cooling System	Pressurized, closed recovery
Cooling Fan	Pusher Type
Cooling System Capacity	5.0 U.S. gallons (19.3 liters)
Recommended Coolant	Use a 50-50 mixture of
	ethylene glycol base
	and de-ionized water.

1.11 FUEL CONSUMPTION

Natural Gas:

	% of Load	25%	50%	75%	100%
	m3/hr	4.1	7.7	11.0	14.2
	ft3/hr	143.1	271.1	388.5	502.0
LP Vapor:
	% of Load	25%	50%	75%	100%
	m3/hr	1.7	3.3	4.7	6.0
	ft3/hr	60.7	115.0	164.9	213.0

1.12RECONFIGURING THE FUEL SYSTEM

NOTE:

All models are configured for natural gas 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).

Figure 1.8 — Reconfigure the Fuel System

	Port 1		Port 2
	FUEL HOSE	FUEL HOSE
PLUG	BRASS HOSE	BRASS HOSE	PLUG
	FITTING	FITTING
	OUT	OUT
	PORT 1	PORT 2
	HOUSING	HOUSING
		PORTS
	PORTS

NG FUEL SYSTEM LP FUEL SYSTEM

3.Remove the brass hose fitting from the outlet port (Port 1) of the demand regulator.

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.

10.Reverse the procedure to convert back to natural gas.

Generac® Power Systems, Inc. 7