Winnebago 2004 Ultimate Freedom, Руководство пользователя, Страница: 71 / 152

5-5
SECTION 5
LP GAS SYSTEM
LP GAS ALARM - See page 1-2.
WINTER USE OF LP GAS
Due to vaporization characteristics of LP gas,
it is important that the winter camper knows how
to most efficiently use the LP system. The vapor-
ization rate of LP gas decreases in a direct rela-
tionship to a decrease in temperature. Propane
will convert to a usable gas at temperatures down
to -44
°
F. For this reason, propane is a popular
heating fuel in cold climates.
The greater the amount of liquid gas in the
tank (up to 80% level) the greater the amount of
LP gas vapor generated. The following is an
example of the number of BTU’s available from
an 84-pound tank at 0
°
F at three levels. As you
can see, the number of BTU’s decreases as the
tank is emptied. Nearly twice as many BTU’s are
available from a full tank than one that is one-
fourth full.
BTU’s Available at 0
°
F.
Tank Level BTU’s
80% 64,000
50% 50,400
20% 33,000
The following LP Gas Vaporization and Tem-
perature Relationship chart typifies the LP gas
loss with a decrease in temperature. The percent-
age figures are the increase or decrease of vapor
that would be available at 0
°
F. These figures
apply to any size LP gas tanks.
Percentage of BTU’s
Temperature Available at 0
°
F.
20
°
F. 200%
10
°
F. 150%
0
°
F. 100%
-5
°
F. 75%
-10
°
F. 50%
-15
°
F. 25%
-20
°
F. 12 1/2%
-44
°
F. Propane will
not vaporize