Winco PSS10H/A - Manual (Page 7)

PAGE 5 2234-01 60706-152
the engine is in direct relation to the correctness of the
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
The PSS10H/A generator systems have been tested
on NATURAL GAS prior to shipment. If you are going to
use them on LP vapor, follow the adjustment procedures
below.
ADJUSTMENT PROCEDURE
These units require no changes to the regulator.
After plumbing in the fuel lines the only thing necessary
is to reset your mixture as detailed below.
1. Insure the unit is operating with an 80 to 100% load or
at the highest anticipated load.
2. Attach a frequency meter to monitor Hz.
Note: The fuel mixture adjustment on the PSS10H is
the brass load block located on top of the demand
regulator. This load block is a multi-turn needle
valve.
3. Begin making a mixture adjustment, observing the Hz
meter. If the meter begins to drop you have the mixture
set too lean or to rich . Adjust the valve in the opposite
direction. Adjustments should be made very slowly.
Adjust back and forth until the highest Hz is achieved.
Do not turn the valve richer after the Hz quits rising,
this would cause the engine to run rich. If the Hz is out
of upper or lower limits, a governor adjustment will be
necessary.
4. See your engine manual for governor adjustment
procedures.
**** CAUTION ****
Under full load do not adjust the Hz above 59. If a higher
Hz reading is used, as the load is decreased the Hz
will go out of upper limits (61 to 62 Hz).
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 crank-
case 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. Gel batteries should
not be used with the battery tender installed in the
generator enclosure.