Winco PSS12H2W/D - Manual (Page 6)

PAGE 4 60706-184 8009-30
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 five (5) feet
clearance on all sides. See NFPA Code 37 for additional
clearance requirements.
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 ****
*************
FIRE HAZARD - All fuel runs should be installed by a
licensed fuel supplier.
To connect the fuel line to the generator set you will have
to remove the access panel on the air intake end of the
enclosure. With this panel remove you will be able to
access the complete fuel system on the unit. You will
need to do two things with this panel removed.
First you will connect your incoming fuel line to the 3/4
inch NPT fitting provided inside the enclosure. This is
shipped with a plastic cap plug installed to insure the
fuel system stays clean.
For all vapor fuel systems the delivery pressure of the
fuel to the fuel solenoid on 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.
The second thing you need to do is ensure that your unit
is connected for the correct fuel. These units come
capably of working on either LP or NG fuel. It just
depends on where the fuel line from the engine is
connected to the demand regulator.
These units are normally tested on Natural gas and will
have the fuel line connected to the N.G. port on the fuel
outlet tee. If you are going to operate on LPG you will
need to move the fuel line from the NG port to the LPG
port on the fuel outlet tee. These two ports have different
orifice inserts installed in them, which provide proper
engine operation with no further adjustments.
When moving the fuel line from one port to the other be
sure not to kink or bend the line. Use as large a sweep-
ing curve as possible and never shorten the fuel line. For
proper operation the fuel line must stay the same length
as it was shipped.
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.
Connect fuel line from
engine here for LP
operation.
Connect fuel line from
engine here for NG
operation.