Kohler Generator Sets 20--2800 kW User Manual download pdf (Page 41)

TP-5700 7/93 29Section 6 Fuel Systems

6.6 Gasoline Fuel Systems

Due to code restrictions which do not allow storage of

more than one gallon (3.8 L) of gasoline inside a

building, gasoline fuel systems are usually limited to

housed generator sets installed outdoors or portable

trailer-mounted units.

Gasoline will deteriorate if stored for more than six

months, so storage tank size should be kept to the

minimum required by code. Engine fuel pumps usually

will lift fuel up to four feet (1.20 m) or draw it horizontally

up to 20 feet (6.01 m). Auxiliary electric pumps powered

by the engine starting-battery can be connected in

series with the engine pump. See Figure 6-4. Auxiliary

pump pressure should be limited to approximately 5 psi

(34.5 kPa). If the auxiliary pump is located at the fuel

tank, horizontal and vertical distance limits of

approximately twice those for a lone engine pump are

practical.

Fuel supply lines should be Schedule 40 black iron pipe,

steel tubing, or copper tubing. Galvanized pipe and

fittings are not recommended. Line size should be kept

to the minimum necessary for the required flow.

TP-5700-6

1. Fuel tank

2. Fuel pump

3. Gasoline shutoff

4. Gasoline carburetor

Figure 6-4 Gasoline Fuel System

Flexible connections at least six inches (15.3 cm) in

length should be used between stationary piping and

the engine fuel inlet connection.

Explosive fuel vapors.

Can cause severe injury or death.

Use extreme care when handling,

storing, and using fuels.

WARNING

Combination natural gas-gasoline fuel systems are

sometimes used with gasoline as a standby fuel to meet

code requirements for on-site fuel supply. Such systems

are not recommended unless the engine will be

operated on gasoline often enough to ensure that fuel

does not deteriorate and the carburetor will not be

disabled by accumulated gum and fuel deposits.

If a fuel storage tank is located above the engine, an

anti-siphon fuel solenoid valve or air bleed hole in the

fuel tank dip tube (near the top of the tube inside the

tank) should be used to prevent siphoning.

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Kohler Generator Sets 20--2800 kW User Manual Page 41

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