34
OPERA
TION
LPG Supply Tank Requirements
Use only liquid withdrawal type supply tanks for your
LPG burners.
Two types of LPG supply tanks are available: tanks
for liquid type burners and tanks for vapor type burn-
ers. The LPG burners on your Etnyre distributor re-
quire a supply tank for liquid type burners. Liquid type
burners will operate from a vapor withdrawal tank,
however the amount of heat delivered will be dramati-
cally reduced, and the life of the burner will be short-
ened.
There are three different types of LPG burners:
manual control burners, burners with outfire control,
and burners with automatic ignition and temperature
limiting control.
Manual Control Burners
There are four valves associated with operation of
the manual control burners: one at the supply tank, and
three in the burner piping.
The two smaller valves (one at each burner) are
bleeder type valves with a small hole drilled through
the valve case. Propane liquid is supplied to the bleeder
valve directly from the supply tank shutoff valve. Be-
cause of the bleeder hole in this valve, it is NOT pos-
sible to shut off all of the fuel to the lower burner by
shutting the main valve at the burners. The main burner
valve will only shut off the upper burner. The lower
burner must be shut off using the supply tank valve.
WARNING
Always shut off burners using the main shutoff
valve on the supply tank
The large valve located in the fuel line to the outside
or upper burner is a positive cut off valve that allows
all fuel to be cut off to the bleeder valve on the outside
burner only.
Burner Operation
Be sure that the main supply valve and the main
burner valves are fully closed and the bleeder valves
are turned fully clockwise before starting.
Open the dampers in the flue exhaust stacks.
Circulate the asphalt in the tank before lighting the
burners. If the asphalt is too cold to pump, start circu-
lating the material in the tank as soon as possible after
lighting the burner.
Heating Asphalt with Liquid Propane
Gas (LPG) Burners
IMPORTANT
Circulating the asphalt in the tank while heating
is recommended for faster heating and
reduced carbon formation on the flues. Only
when the asphalt pump is “Frozen” is it
acceptable to operate the burners without
circulating asphalt in the tank. However, if the
asphalt pump is frozen, carefully apply heat to
the pump and start circulating the material as
soon as possible.
WARNING
Residual fuel in LPG burners will support a
flame for several minutes after the fuel flow has
been shut off. After using LPG burners, confirm
that all flame has been extinguished before
attempting any operation that could release
flammable vapors.
Failure to ensure that the flame is completely
extinguished could result in an explosion or fire
that can cause injury or death.
To prevent an explosion or fire hazard: Position
unit broadside to wind whenever possible to
prevent volatile fumes from drifting toward
burners
To prevent an explosion or fire hazard: Flues
MUST be covered by a minimum of 6 inches of
material when the burners are in operation.
To prevent an explosion or fire hazard: Do not
remove material from tank in any manner when
the burners are in operation.
To prevent an explosion or fire hazard: Do not
drive unit when burners are operating.
To prevent an explosion or fire hazard: Do not
operate burners if tank is damaged or leaking.
To prevent an explosion or fire hazard: When
burners go out, allow flues to ventilate for
several minutes before relighting burners.
To prevent an explosion or fire hazard: Do not
heat material beyond the manufacturers
recommended temperature.
To prevent foaming or violent eruption, do not
heat material over 200ºF if moisture is present
in tank.
To prevent possible burns from material
overflow, allow sufficient space in tank for
expansion of material when heating.