Owner`s manual
2008 KNIGHT
LP GAS SYSTEMS — 7
146
LP-GAS FUNDAMENTALS LP-GAS REGULATOR
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 the vaporizing action of
the liquid. 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,
for the appliance heat output to remain stable.
Vapor pressure regulation is performed by the
regulator.
The two-stage regulator reduces vapor
pressure so that it is safe for use. The rst
stage of the regulator reduces tank pressure
to a range of 10 to 13 psig (pounds per square
inch gauge). The second stage further reduces
pressure to a working pressure of 0.4 psig (11
Inches of Water Column or about 6¼ ounces
psi.). A vent is installed to allow the internal
diaphragm to move with atmospheric pressure
change. It is important to keep the vent clean
and clear of obstruction or corrosion. If the vent
becomes clogged, pressure from LP tank may
cause erratic pressure regulation. If there is any
corrosion, contact a qualied LP-Gas service
technician. The regulator is mounted so that
the vent faces downward. If the vent becomes
clogged, clean it with a toothbrush.
NOTE
The above information is not a complete guide for the use of
LP-Gas tanks or appliances. In cold climates keep
LP-Gas level above 50% to keep vaporization of LP-Gas at
the highest level.