Winco ULPSS20B4W/A - Manual (Page 7)

7 20-00 60706-228
FEET SIZE OF PIPE
up to 25 FT* 3/4 “ 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).
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 regu-
lator, 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 regu-
lator 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 table below for the correct size of pipe to be
installed.
FEET SIZE OF PIPE
up to 25 FT* 3/4 “ Pipe
25 - 100 FT* 1” Pipe
over 100 FT* Consult Factory
* 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 be-
come eroded and flake off, causing possible obstruc-
tions 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 seal-
ing compound can be drawn into the solenoid, regu-
lator or carburetor causing an engine malfunction.
FUEL PRESSURE
LP & NG VAPOR FUEL Correct fuel pressure can-
not be stressed enough. The most common cause
for inoperative systems is an inadequate or incor-
rect 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
(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.
Reference numbers  through 3 in the diagrams
above are system parts supplied by the customer.
Reference number 4 is on the generator.