Winco PSS12/A - Manual (Page 7)

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fuel system. Shown below is a block diagram of a
typical L.P. or N.G. vapor fuel installation.
Notice the following tables give two (2) different units of
measuring fuel pressure. The first and most accurate is
the use of a simple water manometer. A manometer is
calibrated in inches of water column. The second is with
a pressure gauge calibrated in ounces per square inch.
TWO (2) REGULATOR FUEL SYSTEM
Supply Primary Secondary Generator
Tank Regulator Regulator Set
1 2 3 4
SINGLE REGULATOR FUEL SYSTEM
Supply Primary Generator
Tank Regulator Set
1 3 4
Reference numbers 1 through 3 in the block 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
Single Regulator (L.P. Vapor only)
1 3 4
UNIT OFF TANK PSI 7-11 in 7-11 in
4-6 oz 4-6 oz
STARTING TANK PSI 7-11 in 7-11 in
4-6 oz 4-6 oz
NO LOAD TANK PSI 7-11 in 7-11 in
4-6 oz 4-6 oz
FULL LOAD TANK PSI 7-11 in 7-11 in
4-6 oz 4-6 oz
Two (2) Regulator System (L.P. Vapor only)
1 2 3 4
UNIT OFF TANK PSI 10-15 lbs 7-11 in 7-11 in
4-6 oz 4-6 oz
STARTING TANK PSI 10-15 lbs 7-11 in 7-11 in
4-6 oz 4-6 oz
NO LOAD TANK PSI 10-15 lbs 7-11 in 7-11 in
4-6 oz 4-6 oz
FULL LOAD TANK PSI 10-15 lbs 7-11 in 7-11 in
4-6 oz 4-6 oz
Natural Gas
1 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
LP/NG FUEL CONVERSION
These generator sets are factory tested on Natural Gas
and will require no modifications for normal operation on
Natural Gas. The carburation system has been preset
and anti-tamper plugs have been installed in the
carburator as required by EPA.
If you are operating on LP fuel you will have to make the
following modification: On the left side of the engine,
above the starter there is a small two wire connector
laying loose. This connector has to be plugged into the
mating two wire connector coming out of the carburator
area on the left side of the unit. This connection will
engage an orifice in the carburator allowing the unit to
operate on Liquid Propane Vapor fuel. NO other adjust-
ments are required.
If you are reinstalling a unit that has been operating
on Liquid Propane vapor and you now want to operate it
on Natural Gas all that you will need to do is unplug this
connector.
*************
***** WARNING ****
*************
ALL ADJUSTMENTS TO THE FUEL SYSTEM HAVE
BEEN FACTORY SET AND ANTI-TAMPER PLUGS
INSTALLED. DO NOT REMOVE ANY OF THESE PLUGS
WITHOUT FIRST CONTACTING THE FACTORY. NO
FUEL ADJUSTMENTS SHOULD NEED TO BE MADE
WHEN CONVERTING FROM N.G. TO L.P. OR L.P. TO
N.G.
LUBRICATION
Before starting the engine, fill the crankcase with the
proper weight/grade of oil, as recommended by the
engine manufacturer’s maintenance instructions. The
necessity of using the correct oil, and keeping the
crankcase full cannot be over emphasized.
INSTALLING THE BATTERY
**** CAUTION ****
In the following battery installation procedure, check to
be sure the selector switch remains in the “stop” position.
This should be your last step before initial start-up.
A customer supplied twelve-volt battery is required to
complete the installation. Installation of the highest CCA
rated battery, within the correct BCI group, will increase
cold weather starting performance. Use only Mainte-
nance Free batteries, this will reduce the need to refill the
battery with water. Gel batteries should not be used with
the battery tender installed in the generator enclosure.
MINIMUM
Model BCI Group CCA Rating
PSS8.5 U1 235
PSS10 U1 235
PSS12 U1 235