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Liquid Propane Gas System
Selecting Fuel Types
Butane burns at a much higher temperature than propane but will not change from a liquid to a gas at temperatures
below 32 °F - 0 °C. Propane, on the other hand, burns at a lower temperature and will continue to convert from a liquid
to a gas at temperatures as low as -40 °F or -40 °C.
LP gas dealers will normally handle only the type of gas commonly used and suited to the climate in their area. If you
travel from a warmer part of the country to a colder area you may want to verify that you have the right type of LP
gas.
How LP Gas Works
There are two types of LP (Liquified Petroleum) gas - propane and butane. Both are compressed into a liquid for easier
transportation and storage. Common names used are tank gas, bottle gas, or simply LP.
In the tank, LP gas is in the form of a liquid under very high pressure. As it is released, it changes to a vapor or gas
and expands to a much greater volume.
Caution should be exercised when temperatures fall below -40 °C (-40 degrees °F). You could be without propane at
these lower temperatures.
LP Gas Tank System
The LP gas storage tank is mounted underneath the
Motorhome attached to the vehicle floor. It is accessible
only from outside the vehicle. The tank valve is located
near the top center of the tank next to the regulator.
Before opening the supply valve, make sure all controls
for the various appliances are in the "OFF" position. This
is to prevent any LP gas from leaking into the Motorhome.
The supply valve is operated by the LP gas switch on the
monitor panel. The valve is held open using 12 volt DC
power. If the battery is dead or the battery disconnect is
switched off the valve will automatically close. NOTE: The
LP gas storage tank is also equipped with a manually
operated shut-off valve. See the maintenance section
of this manual for details.
Refilling the LP Gas Tank
To fill the LP gas tank:
1.
Shut off the LP gas control valve on the utility center
panel via the rocker switch (1) when filling the tank
and during travel. Always refill an empty LP gas tank
as soon as possible.
2.
Connect the LP gas supply to fill connector (2).
3.
Do not overfill your LP gas tank. Stop filling when
liquid appears at the overflow valve (3) (often called
a 10% valve) which contacts the liquid level at 80% of
container capacity allowing 20% for expansion.
4.
Check after each filling by opening the overflow valve
and bleed gas in well-ventilated area until white liquid
stops. Overfilling may cause damage to the regulator
and cause malfunction of LP gas appliances.
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NOTICE
The LP gas tank has an automatic 80% stop-fill
device to prevent over filling of the tank. To ensure
against overfilling, have the tank filled only by an
authorized filling station.
The tank is permanently mounted to the Motorhome.
Therefore the Motorhome must be taken to a fueling
station to be filled. When the liquid LP gas appears at
the overflow valve (3) the tank is full.
LP gas stations are found in all parts of the country.
Check the yellow pages in your telephone book if you
have trouble finding a station. Look under "Gas - Liquified
Petroleum - Bottled and Bulk" or "Propane."
Unity Motorhome
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