Tiffin Motorhomes 2011 Phaeton, Руководство пользователя

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H E A T I N G & A I R C O N D I T I O N I N G
3-6
LP Gas Regulator
As noted earlier, the LP gas regulator (Figure 3-5) is the “heart” of the LP gas distribution system. This
regulator reduces and controls the pressure of the gas on the outlet end to provide a constant supply of
gas at a constant pressure to the gas-operated appliances. The regulator has a vent to relieve excess
pressure on the inlet side of the regulator, should excess
pressure develop in the gas tank and connecting gas line to
that regulator inlet. The vent would normally release the
excess LP gas to the atmosphere until the over-pressurization
condition is eliminated.
This vent should be regularly checked to assure that it is not
clogged or obstructed. If that vent is blocked from normal
operation, component or system failures may result. If
periodic visual inspection indicates any sign of corrosion or
degradation, contact a qualified service technician to repair
the regulator as soon as possible; DO NOT operate the LP gas system with any faulty component in
place.
Occasionally, the inherent moisture in the LP gas can cause a freeze-up of the regulator when the gas
passes through the regulator. The regulator reduces the high pressure of the gas on its inlet side to a
reduced pressure on its outlet side by permitting a controlled expansion of the gas through the
regulator—this gas expansion necessarily cools the gas (by means of the Joule-Thompson effect) and, if
cooled enough, may cause any moisture content to freeze.
Important
When a LP gas regulator is installed or re-installed, the regulator must always be
installed with the gas diaphragm vent facing downwards. For more information,
consult the manufacturer’s literature in your Owner’s Information Package that came
with the motor home.
To minimize or negate this possibility, always keep the main valve to the LP gas tank closed when the
system is not in use. When the LP tank is empty, keep the main valve closed until re-filling is to be
performed—this process will keep any moisture-laden air from back-flowing into the gas system and
trapping unwanted moisture in the LP gas tank. If an empty LP gas tank has been exposed to the
atmosphere for an extended time, let a qualified service technician purge the tank before its next filling
operation.
Figure 3-5. LP Gas Regulator