36
OPERA
TION
Burners With Outfire Controls
Equipment Design
The burner and the burner control valves are identi-
cal to the manual operated burner system. However,
burners with outfire controls are equipped with an out-
fire control box. The outfire controls consist of two ther-
mocouples, a push button start switch, an electric fuel
solenoid valve, a pressure regulator and a pressure gage.
The heat sensing thermocouples are positioned in
each burner. If either burner loses its flame, the ther-
mocouple senses the drop in temperature, and deacti-
vates the fuel solenoid, and the fuel to both burners is
shut off.
The only operational differences between the manual
burners and burners with the optional outfire controls
is the start up and shut down procedures. Unlike the
manual burners, when the burners are equipped with
outfire controls, no fuel flows to the burners when the
main solenoid shutoff valve is closed.
Burner Operation with Outfire Controls
Turn on the Master Power switches.
Open the dampers in the 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.
Ensure that the main burner control valve is closed
and that the bleeder valves for both burners are turned
fully clockwise.
IMPORTANT
It is recommended that two persons be
involved in lighting the burners. One person
should hold the torch while the other person
opens the valves and holds the pushbutton in.
Open the main fuel supply valve at the tank.
No fuel will be flowing at this point.
As soon as the low fire is established at the inner
burner, open the positive shutoff valve to the outside
burner and light the outside burner on low fire.
After 30 to 40 seconds, release the pushbutton and
observe the pressure gage. If the pressure starts to drop
rapidly, depress the pushbutton and hold it in for an-
other 30 seconds. It may require a slight increase in
fuel to the outside burner to adequately heat the ther-
mocouple. Once both of the thermocouples are heated
the pushbutton can be released.
IMPORTANT
If there is at least 6” of material covering the
entire length of the upper flue, the second
burner can be lit.
WARNING
To prevent possible burns, always use a torch
to light the burners. Never attempt to light the
burners with a match or pocket lighter.
To ignite the second burner ensure that the bleeder
valve on the burner is turned fully clockwise. Position
a lit torch at the burner nozzle and open up the positive
shutoff valve in the line to the burner. As soon as the
low fire is established, the bleeder valve can be opened.
Never leave operating burners unattended.
WARNING
When heating, temperatures within the tank
can vary. Shut the burners off when the
thermometer reaches a reading 10ºF. lower
than the desired temperature. Continue to
circulate & monitor temperature until
temperature stabilizes. Add remaining heat by
operating burners for short periods, monitoring
stabilized temperature after each period.
WARNING
Calibration of thermometers should be verified
to be 2% of full scale reading annually.
Certification can be accomplished by a
qualified laboratory or by comparing stabilized
dial readings to the pencil thermometer
reading. Replace any thermometer that does
not meet the +2% accuracy requirement.
When the desired temperature is reached, close the
main fuel supply valve, at the LPG tank, first. Allow
the burners to operate at full capacity until the fuel in
the line from the tank burns out, then close both bleeder
valves and the positive shutoff valve for the outside
burner.
Close the exhaust stack dampers to prevent heat loss.
