Lp-Gas Regulator - Monaco LaPalma Owner's Manual

LP-GAS REGULATOR

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LP-Gas is compressed into liquid form in the tank. Only
the vapor is used during combustion by an appliance. As
vapor is removed from the tank, the remaining liquid will
vaporize to maintain pressure that is removed during
consumption. This process will continue until there is no
liquid remaining in the tank.
Temperature affects action of the liquid to vaporize. If
temperature of the liquid is - 44º F. the liquid remains
stable with tank pressure about 0 psi. If liquid temperature
is 100º F. the liquid quickly vaporizes with tank pressure
about 200 psi. Vapor pressure must remain relatively
consistent regardless of temperature so that appliance heat
output remains stable. Vapor pressure regulation is
performed by the regulator.
The regulator is the heart of the LP-Gas system. The
regulator reduces vapor pressure so that it is safe to use.
The regulator on the motorhome is a two-stage regulator.
050251
The first stage regulator reduces tank pressure down to a
range of 10-13 psig (pounds per square inch gauge). The
second stage further reduces pressure down to a working
pressure of 0.4 psig (11 Inches of Water Column or about
6¼ ounces psi.). The regulator has a vent that allows the
internal diaphragm to move with atmospheric pressure
change. 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 erratic pressure
regulation. If there is any corrosion, contact 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. Vapor passing through the regulator will expand and cool
condensing moisture in the gas. The moisture will freeze which can build up
and partially or totally block the vent. The possibilities of freeze up are
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.
LP-Gas System
2004 • LaPalma