Winco ULPSS21/A WITH DSE 7310 ENGINE CONTROL User Manual

Page 7

60706-227

Page 5

2090-00

LP LIQUID WITHDRAWAL SYSTEMS

When installing a unit equipped the LP liquid withdrawal a
primary regulator is not required on the supply tank. The supply
line is connected to a liquid withdrawal valve on the supply tank
and runs directly to the fuellock strainer mounted on the engine
generator set. Normally a 3/8 to 1/2 inch copper line is accept-
able for this type of fuel installation. You must be sure that the
valve you have connected to on the supply tank is in fact a liquid
supply valve and has a drop tube inside the tank that is pulling
fuel from the bottom of the supply tank. Before starting the unit
you must confirm that you have a good liquid supply at the unit.
Engine generator sets equipped for liquid withdrawal will not
run properly when supplied with high pressure vapor fuel.

LUBRICATION

Before starting the engine, check the oil level in the crankcase. If
it is low, refill to the full mark 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. Failure to use the
proper oil and keep the crankcase properly filled will cause
excessive engine wear and shorten its useful life.

COOLANT

Before starting the engine, check the coolant level in radiator. If it
is low, refill as specified in the engine manufacturer’s mainte-
nance instructions. The radiator should be filled to about 1 inch
below the filler neck. For additional information on engine coolant
requirements see engine manufacturer’s maintenance instruc-
tions.

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. Gel batteries should not be used with the battery
tender installed in the generator enclosure.

MINIMUM

Model

Voltage

BCI Group CCA Rating

PSS21

650

Installation and servicing of batteries must be performed or
supervised only by personnel knowledgeable of batteries and the
required precautions. Keep unauthorized personnel away from
batteries.

When installing or replacing batteries, use the proper group/size
starting battery. The battery should be a Maintenance Free lead
acid design. Deep cycle batteries will not work for this applica-
tion.

Supply

Primary

Secondary

Generator

Tank

Regulator

Set

1 2

TWO (2) REGULATOR FUEL SYSTEM

Supply

Primary

Generator

Tank

Regulator

Set

SINGLE REGULATOR FUEL SYSTEM

Reference numbers 1 through 3 in the block diagrams above are
fuel lines supplied by customer.

Reference number 4 is the engine generator set.

Below is a table of the fuel pressure readings at each reference in
the system.

Fuel Pressure Table

Single Regulator (L.P. Vapor only)

UNIT OFF

TANK PSI

7-11 in

4-6 oz.

STARTING

TANK PSI

7-11 in

4-6 oz.

NO LOAD

TANK PSI

7-11 in

4-6 oz.

FULL LOAD

TANK PSI

7-11 in

4-6 oz.

Two (2) Regulator System (L.P. Vapor only)

UNIT OFF

TANK PSI

10-15 lbs

7-11 in

4-6 oz.

STARTING

TANK PSI

10-15 lbs

7-11 in

4-6 oz.

NO LOAD

TANK PSI

10-15 lbs

7-11 in

4-6 oz.

FULL LOAD TANK PSI

10-15 lbs

7-11 in

4-6 oz.

Natural Gas

UNIT OFF

LINE PSI

7-11 in

4-6 oz.

STARTING

LINE PSI

7-11 in

4-6 oz.

NO LOAD

LINE PSI

7-11 in

4-6 oz.

FULL LOAD

LINE PSI

7-11 in.

7-11 in

4-6 oz.

Notice the preceding tables give two (2) different units of measur-
ing fuel pressure. The first is with a pressure gauge calibrated in
ounces per square inch. The second and most accurate is the
use of a simple water manometer. A manometer is calibrated in
inches of water column.