Guardian Technologies 004988-4 Specifications, Reconfiguring the Fuel System, Fuel Consumption

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Section 1 — General Information

1.10 SPECIFICATIONS

‹1.10.1 GENERATOR SPECIFICATIONS

 

 

Single-phase

 

Model

004988-4

 

 

Rated Max. Cont.

27 (NG), 30 (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

 

 

 

 

‹1.10.2 ENGINE SPECIFICATIONS

Make

Ford

Displacement

3.0 liters

Cylinder Arrangement

V-6

Valve Arrangement

Overhead Valve

Firing Order

1-4-2-5-3-6

Number of Main Bearings

4

Compression Ratio

9.3 to 1

No. of Teeth on Flywheel

164

Ignition Timing at 1800 rpm

30 degrees BTDC

Spark Plug Gap

0.042-0.046 inch

Recommended Spark Plugs

 

Motor Craft

AG, SF 32PGM

Oil Pressure

40-50 psi

Crankcase Oil Capacity

5.0 U.S. quarts (4.7 liters)

Recommended Engine Oil

SAE 5W-20

Type of Cooling System

Pressurized, closed recovery

Cooling Fan

Pusher Type

Cooling System Capacity

3.0 U.S. gallons (11.4 liters)

Recommended Coolant

Use a 50-50 mixture of

 

ethylene glycol base and de-ionized water.

Liquid-cooled 30 kW Generators

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.

1.12RECONFIGURING 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).

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.

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

 

1.11 FUEL CONSUMPTION

Natural Gas:

 

% of Load

25%

50%

75%

100%

 

m3/hr

3.1

5.9

8.5

11.0

 

ft3/hr

110.3

209.0

299.5

387.0

LP Vapor:

 

 

 

 

 

% of Load

25%

50%

75%

100%

 

m3/hr

1.3

2.4

3.5

4.5

 

ft3/hr

45.6

86.4

123.8

160.0

HOUSING

HOUSING

PORTS

PORTS

 

NG FUEL SYSTEM

LP FUEL SYSTEM

NOTE:

Fuel consumption is given at rated maximum continuous 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 consumption obtained may vary depending on such variables as applied load, ambient temperature, engine condi- tions and other environmental factors.

NOTE:

Port 1 is for NG only and Port 2 is for LP vapor only. No provision for dual fuel has been made.

DANGER

Serious injury or damage may occur if not con- figured properly. Please consult an Authorized Service Dealer with any questions.

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Contents Liquid-cooled, Prepackaged Standby Generators ‹ Operation and Maintenance Authorized Service Dealer Location‹ HOW to Obtain Service IntroductionTable of Contents  Warning   Electrical Hazards  Generator Transfer SwitchAutomatic System Operation Generator AC Connection Systems‹ 1.7.1 LOW OIL Pressure Switch ‹ 1.7.2 High Coolant Temperature Switch‹ 1.7.3 LOW Coolant Level Switch LOW OIL Presure Switch LOW Coolant Level SwitchLifting the Generator UnpackingReconfiguring the Fuel System Specifications‹ 1.10.1 Generator Specifications ‹ 1.10.2 Engine SpecificationsStandby Generator Installation Torque SpecificationsBefore Installation Engine OIL RecommendationsGenerator Mounting Support Basic Standby Electric System‹ 2.1.2 Other Published Standards Emergency Circuit Isolation Method Transfer Switch Signal ConnectionsTotal Circuit Isolation Method Grounding the GeneratorBattery Installation Preparation Before START-UP‹ 2.9.2 GTS-TYPE ATS Using AN Engineered GTS Transfer Switch ‹ 3.2.2 Fault Indicator LED ‹ 3.2.1 AUTO/OFF/MANUAL Switch‹ 3.2.5 SET Exercise Time Switch Control Console ComponentsManual Transfer START-UP Engine Governor AdjustmentsRetransfer and Shutdown Automatic OperationCooling System Weekly Exercise CycleChecking Fluid Levels Overload Protection for Engine DC Electrical System‹ 4.5.8 Check FAN Belt ‹ 4.5.11 Changing the Engine AIR Cleaner‹ 4.5.9 Inspect Engine Governor ‹ 4.5.10 Changing Engine OIL‹ 4.6.3 Battery Maintenance Miscellaneous Maintenance‹ 4.6.1 Cleaning the Generator ‹ 4.5.13 Coolant Change‹ Periodic Replacement Parts ‹ 4.6.4 Battery ReplacementService Maintenance Interval Information Scheduled MaintenanceLevel Maintenance Level Problem Cause Correction Troubleshooting PointsLiquid-cooled 30 kW Generators Installation Diagram AUTO/OFF/MANUAL Switch Transfer SwitchSET Exerciser Switch Size AWGBAT Otherwise Noted AS ShownIgnition Coil On PCBSWITCH, AUTO/OFF/MANUAL SWITCH, SET ExerciserDPE ALT 12V Battery REDDEG Starter Motor GOVEngine Foot Battery Post Cover Baclk Boot Battery CableBattery Post Cover RED + Hold Down BatteryTo a To B Plcs Intake Duct HSB Assy Wire 14AWG 7.5 #0 GRN/YELDuct Discharge RH Front Duct Discharge LH FrontPage Control BOX HSB Assy 2A 12V UL BatteryDecal AVR Cover Cover Front Panel HSBCooled 30 kW Drawing No Exploded Not SHOWN-USED to Hold OIL Drain Assembly Wire SET 3.0L Ford notCoil Ignition 3.0L Ford Bracket DC ALT 3.0L FordFrame Radiator R-IN,L-OUT Tank Coolant RecoveryVenturi 3.0L Ford HSB Side Support Radiator HSBTo B Flange Fuel Inlet Weldment Mounting BaseAssy Regulator 3.0L NG or LPV Washer Flat 5/16 ZincLocktight Rotor 390 20KW 1P Direct HSB 2.5L Ford Rotor 390 15KW 1P Direct HSB 2.5L FordRotor 390 25KW 1P Direct HSB 2.5L Ford Rotor 39030AD1 HSB TecumPipe Muffler OUT Exhaust Flange 2 PipeWasher Lock 3/8 SS Gasket Exhaust RingElement AIR Cleaner Plate AIR Cleaner AdapterCover AIR Cleaner Adapter Carburetor W/PVC ConnWarranty Schedule

004988-4 specifications

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