Winco ULPSS20B4W/A - Manual (Page 8)

20-00 8 60706-228
Shown below is a diagram of a natural gas (NG)
installation.
Reference numbers 2 through 4 in the diagram
above are system parts supplied by the customer.
Reference number 4 is on the generator.
Below are tables of the fuel pressure readings at
each reference in the system.
FUEL PRESSURE TABLES
Single Low Pressure Regulator (LP Vapor only)
REF # 1 3 4
UNIT OFF LINE PSI 7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
STARTING LINE PSI 7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
NO LOAD LINE PSI 7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
FULL
LOAD
LINE PSI 7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
Two (2) Regulator System (LP Vapor only)
REF # 1 2 3 4
UNIT
OFF
LINE PSI 10-15
LBS
7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
START-
ING
LINE PSI 10-15
LBS
7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
NO
LOAD
LINE PSI 10-15
LBS
7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
FULL
LOAD
LINE PSI 10-15
LBS
7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
Natural Gas
REF # 2 3 4
UNIT OFF 2 PSI 7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
STARTING 2 PSI 7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
NO LOAD 2 PSI 7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
FULL
LOAD
2 PSI 7-11 IN
4-6 OZ
7-11 IN
4-6 OZ
LP TANK SIZING
Required LP tank size for LP Vapor withdrawal
operating at various outside temperatures given in
degrees Fahrenheit (Celsius).
TANK TEMPERATURE TANK SIZE
60° F (16° C) 150 GALLON
32° F (0° C) 250 GALLON
0° F (18° C) 500 GALLON
-20° F (-29° C) 1000 GALLON
NG/LP FUEL CONVERSION
These generator sets are factory tested on Natural
Gas and will require no modifications for normal
operation on Natural Gas. The carburetion system
has been preset and anti-tamper plugs have been
installed in the carburetor as required by the EPA.
To make a fuel conversion you will have to first
remove the left side door. Looking down to your left
you will see a decal and a plug. Remove the plastic
plug with a screwdriver. Using a 5mm or 3/6” hex
allen wrench turn LEFT about /4 turn until you feel
a click and it will stop turning.
No other modifications to the unit are necessary. To
switch from LP to NG you turn the selector to the
right (NG) position.