The regulator is the heart of an LP-Gas system. The LP-
Gas in the tank is under high pressure. The regulator
reduces the pressure of gas so that it is safe to use with vari-
ous appliances. The regulator on the motorhome is a two-
stage regulator. The first stage regulator reduces the full
tank pressure down to a range of 10-13 psig (pounds per
square inch gauge). The second stage further reduces the
pressure down to an outlet pressure of 0.4 psig (11 inches
of water column). The regulator is equipped with a vent
that allows it to breathe. It is important to keep the vent
clean and clear of obstructions or corrosion. If the vent
becomes clogged, pressure from LP tank could cause a
failure of the components. If there is any corrosion, con-
tact a qualified LP-Gas service technician. The regulator
is mounted so that the vent faces downward. If the vent
becomes clogged clean it with a toothbrush.
Under normal atmospheric conditions an LP regulator
will not freeze, nor will the LP-Gas. The gas passing
through the regulator will expand and cool creating
moisture in the gas. This moisture will turn to ice which
can build up and partially or totally block the orifice. The
possibilities of freeze up is greatly reduced with the two
stage regulator.
To prevent freeze up:
1. Ensure the LP tank is totally free of moisture prior to filling.
2. Ensure the tank is not overfilled.
3. Keep the valve closed when the tank is empty.
4. If a freeze up occurs, have an LP-Gas distributor purge the tank.
5. Have the LP-Gas distributor inject methyl alcohol in the tank.
WARNING: Do not attempt to adjust the regulator, it is preset
at the factory. If adjustments need to be made it requires
special equipment. Failure to follow these instructions may
result in a fire or explosion and cause severe personal injury
or death. Do not attempt to enter the motorhome until the
problem has been corrected!
LP-Gas Systems
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DIPLOMAT
7•196
LP-GAS REGULATOR
A typical two-stage regulator.
OM050251.eps
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