Winco PSS8B2W/F, Installation & Operator'S Manual

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60706-211/F
operating pressure. This low pressure 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 reservoir. This is also true for the single low pressure
regulator, it should also be a 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) regulator system is
used on LP, 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 low pressure regulator. Consult your local fuel supplier
for your exact requirements . The appropriate line size from
the following table is then installed from the low pressure
regulator to the generator set.
Feet* Size of pipe
Up to 25 ft ¾” pipe
25 - 100 ft 1” pipe
Over 100 ft Use a two regulator system
*Allow an additional 3 feet for each standard elbow. DO
NOT use ‘street ells’ (restrictive).
LP TANK SIZING
Tank Temperature Tank Size
60° F (16° C) 150 Gallons
32° F (0° C) 250 Gallons
0° F (18° C) 500 Gallons
-20° F (-29° C) 1000 Gallons
NATURAL GAS (NG)
The primary regulator (fuel meter) on the building should
deliver the correct volume and pressure to the generator
set. This regulator must be sized to deliver the required
BTU’s to the generator set and all other appliances in the
building. If the primary regulator (fuel meter) is a high
pressure regulator, then a low pressure regulator must be
installed to bring the pressure down to 4-6 oz. (7-11 inches
water column) of pressure. This low pressure 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 reservoir. If this is not done, the demand regulator
on the unit and the pressure regulator in the fuel line will
interfere with each other. This regulator must be sized to
accommodate the demand of the generator set and any
other appliance connected to it. See the following table for
the correct size of pipe to be installed.
Feet* Size of pipe
Up to 25 ft ¾” pipe
25 - 100 ft 1” pipe
Over 100 ft Use a two regulator system
*Allow an additional 3 feet for each standard elbow. DO
NOT use ‘street ells’ (restrictive).
WARNING: 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 to hazardous fuel leaks.
CAUTION:
Be careful when sealing gas joints. Excessive sealing
compound can be drawn into the solenoid, regulator or
carburetor causing an engine malfunction.
FUEL PRESSURE
Correct fuel pressure cannot be stressed enough. The most
common cause for inoperative systems is an inadequate
or incorrect fuel pressure. Performance of the engine is in
direct relation to the correctness of the fuel system. Shown
below is a diagram of a typical LP vapor fuel installation.
Notice the following tables give two 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.
Reference numbers 1 through 3 in the diagram above are
system parts supplied by the customer. Reference number 4
is on the generator.
The following diagram is of a natural gas (NG) installation.
Reference numbers 2 through 4 in the previous diagram
are system parts supplied by the customer. Reference
number 4 is on the generator.