7 • 272
2004 • LaPalma
LP-Gas System
The LP-Gas detector is required safety
equipment in RVs. American National Standards
Institute (ANSI) A119.2 - Fire & Life Safety 3-4.8
LP Gas Detectors states "An LP Gas detector must be
installed in any RV that contains an LP Gas
appliance and an electrical system. The LP Gas
detector must be listed as suitable for use in
recreational vehicles under the requirement of UL
1484 Residential Gas Detectors, and installed
according to the terms of its listing."
The detector senses both LP-Gas and methane
gas. Liquefied Petroleum (LP) Gas is heavier than
air; methane gas is lighter than air. LP-Gas will settle
to the lowest point, generally the floor of the
motorhome. Methane gas will rise. The gas detector is
also sensitive to other fumes such as hair spray, of
which most contain butane as the propellant. Butane,
like propane, is heavier than air and will settle to the
floor level where it will be detected. Sulfated batter-
ies (rotten egg odor) will also sound the alarm. When
this occurs, reset the detector to stop the alert sound.
About the LP-Gas Detector:
It is important to be aware of the difference between a gas leak versus gas
escaping from an unlit, open burner. Pure propane vapors from a leaking pipe
or gas fitting are heavier than air and will build up their heaviest
concentration at the leak and float down until they mix with air. Gas from
open burners is intentionally mixed with air to induce burning and will
dissipate into the air. When mixed with air, the gas becomes only marginally
heavier than air and will expand outward. If a gas burner is left on, the area
around the burner, range, and adjoining counter space will be combustible
and can cause injury and damage if ignited. This condition will exist for an
extended time period and eventually the gas will reach the detector's location
and be detected.
NOTE: The LP detector only indicates the presence of
propane gas at its sensor. Combustible levels of propane gas
may be present in other areas. This detector is intended for
the detection of propane gas ONLY.
LP-GAS DETECTOR
030646
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