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3180-10
60706-238
A positive fuel shut-off device must be installed
in the fuel line close to the engine generator set.
This manual shut-off valve is require by code even if
the 12 volt fuel solenoid kit is installed. This optional
12 volt DC valve is available through your local
Winco dealer and can be used to shut the fuel off
during normal periods of operation without having to
shut off the manual valve.
The fuel line used to connect the supply line to the
demand regulator must be a locally approved fl exible
fuel line. Products used will vary in different regions
depending on availability and local codes. Consult
with your local fuel supplier to ensure complete com-
pliance with ALL codes.
1. Remove the plastic cover plug from the demand
regulator.
2. Connect the fl ex fuel line to the demand regulator
or the optional fuel solenoid..
DANGER: PERSONAL INJURY
Do not use galvanized pipe in the fuel line runs.
The galvanized coating will become eroded and
fl ake off, causing possible obstruction or damage
to the regulator or fuel valve. The obstruction could
cause an inoperative engine or an explosive fuel
leak.
Size of pipe required for generators operating on
natural gas. All pipe sizing is based on 1/2” WC
pressure drop at 11” WC setting. For pressure less
than 11” WC (6 oz.) consult the gas company for
proper line sizing for your fl ow rate.
Length of Fuel Line* Fuel Line Size
less than 50 feet
3/4 inch black pipe
50 to 200 feet**
1 inch black pipe
*Allow an additional 3 feet for each standard elbow.
Do not use ‘street ells’ (restrictive)
** Consult factory for fuel runs over 200 feet.
DANGER! - FIRE - PERSONAL INJURY -
Be careful when sealing gas joints. Excessive
sealing compound can be drawn into the solenoid,
regulator or carburetor causing an engine malfunc-
tion or dangerous fuel leak
.
FUEL CONSUMPTION (Full Load)
Gasoline
1.67
Gal/HR
Natural Gas
160 cu. ft./hr
160,000 BTU/HR
FUEL PRESSURE
Correct fuel pressure cannot be stressed enough.
The most common cause for inoperative systems is
an inadequate or incorrect fuel pressure. Power and
performance of the engine is in direct relation to the
correctness of the fuel system. Shown below is a
diagram of a typical NG installation.
Reference numbers 2 an 3 in the diagrams above
are system parts supplied by customer.
Reference number 4 is the engine generator set.
Below is a table of the fuel pressure reading at each
reference in the system.
Fuel Pressure Table
Natural Gas
2
3
4
UNIT OFF
LINE PSI 7-11 in
7-11 in
4-6 oz
4-6 oz
STARTING
LINE PSI 7-11 in
7-11 in
4-6 oz
4-6 oz
NO LOAD
LINE PSI 7-11 in
7-11 in
4-6 oz
4-6 oz
FULL LOAD
LINE PSI 7-11 in
7-11 in
4-6 oz
4-6 oz
Remember that the fuel pressure at the demand
regulator installed on the engine generator must be
between 4 and 6 oz. (7-11 inches of water column).
Any lower pressure and the unit will starve for fuel
under load. Any higher and the unit will ‘fl ood’ when
attempting to start.
