Winco PSS8B4W/A - Manual (Page 6)

PAGE 4 60706-166 4023-50
ENGINE GENERATOR SET MOUNTING
The unit’s main frame should be bolted solid to a four to
six inch thick cement pad. The engine-generator is
mounted on a sub-frame which is isolated with special
shock mounts on the main frame. This allows the engine-
generator to vibrate without affecting the control panel on
the main frame.
Do not install any shock mounts between the base
frame and the concrete pad. Engine vibration will be
transmitted to the control panel causing erroneous start/
stop cycles and premature control failure.
The unit should be mounted to allow for ample working
room around it. A general rule to follow is three (3) feet
clearance on all sides. NFPA 37 requires at least 3 feet
clearance from any structures having combustible
adjacent walls and 5 feet from openings in walls. Particu-
lar attention should be paid to the direction of the hot air
discharge and exhaust discharge. Unit location should be
such that these discharges are not allowed to be drawn
back in through an open window or door.
FUEL INSTALLATION
The fuel supply should be as close as possible to the
engine. This will reduce the installation cost of fuel runs.
The information in this manual is offered to assist you in
providing the proper fuel for your engine. However, this
information is only provided to inform you of the engine’s
requirements and assist in making you aware of the
decisions you must make. In no case should the
instructions or information provided be interpreted to
conflict with any local, state or national codes. If in doubt,
always consult your local fire marshal or gas supplier.
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***** WARNING ****
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FIRE HAZARD - All fuel runs should be installed by a
licensed fuel supplier.
You will connect your incoming fuel line to the 3/4 inch
NPT fitting mounted in the side of the enclosure. This
fitting is shipped with a plastic cap plug installed to
insure the fuel system stays clean.
When you connect the fuel line to the generator set you
need to be careful not to overtighten the connection. You
are connecting into a cast aluminum fitting that will crack
if it is overtighten.
For all vapor fuel systems the delivery pressure of the
fuel to the unit must be four to six ounces psi (per square
inch) or 7 to 11 inches W.C. (Water column). These fuel
pressures are critical; failure to provide the proper fuel
pressure can cause many problems ranging from a unit
that will not start to causing damage to the fuel system.
These units are normally tested on Natural Gas and will
have a tag hanging on the fuel hose indicating what fuel
your unit was factory tested on. If you are running on LP
or have to change fuel types at any time see the informa-
tion on the next page on LP/NG CONVERSION.
INSTALLING THE FUEL LINE
** NOTICE **
The engine generator sets are properly adjusted before
they leave the factory. A tag is attached to the unit that
specifies the fuel, natural gas (NG) or propane vapor (LP)
that the unit was set up and tested on.
Line Size
Unit location will determine the size of fuel line that is
required to supply the engine with a constant fuel
pressure and volume. Refer to the tables below for fuel
line size, fuel consumption and recommended tank size.
For distances of 50 feet and over, a two regulator fuel
system is recommended. This is accomplished by
installing a primary regulator at the tank which will reduce
the tank pressure down to 10 to 15 lbs. A secondary
regulator is installed to further reduce the fuel pressure
to the required four (4) to six (6) oz. operating pressure.
This secondary regulator must be at least 10 feet from
the engine generator set, any closer installation will
require a larger line be installed to provide a fuel reser-
voir. This is also true for the single dual stage regula-
tors, it should also be minimum of 10 feet from the unit.
If this is not done the demand regulator on the unit and
the pressure regulator in the fuel line will interfere with
each other.
When the two (2) stage regulator system is used, a fuel
line size of 1/2 to 5/8 inch is generally adequate for
distances up to 300 feet from the primary to the second-
ary regulator. (Consult your local fuel supplier for your
exact requirements.) The appropriate line size from the
table below is then installed from the secondary regula-
tor to the generator set.
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***** WARNING ****
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PERSONAL DANGER - Do not use galvanized pipe in
fuel line runs. The galvanized coating can become
eroded and flake off, causing possible obstructions in the
regulator or fuel valve. The results could range from
inoperative engine start to hazardous fuel leaks.
NATURAL GAS or LP VAPOR
Size of pipe normally required for generators operating
on NATURAL GAS or LP VAPOR
up to 25 feet* 25 - 100 feet* over 100 feet*
use a two
PSS8B4W 3/4” pipe 1” pipe regulator system
*Allow an additional 3 feet for each standard elbow. Do not use
‘street ells’ (restrictive)*