37
OPERA
TION
IMPORTANT
In order to activate the thermocouples, both
burners must be lit on low flame even if only
one burner will be used for heating. Place the
ignition torch at the inside burner nozzle and
depress the pushbutton in the outfire control
box. Continue to hold the pushbutton in until
both burners are lit.
If both burners are to be used for heating, you can
now open both bleeder valves. If only the inside burner
is to be used for heating, open the bleeder valve on the
inside burner and allow the outside burner to remain
burning on low flame so the thermocouple will be
heated. Remember, if either burner flame goes out, the
outfire control will shut the solenoid valve cutting the
fuel off to both burners.
WARNING
A fully charged dry chemical type fire
extinguisher must be within easy reach
whenever the burners are operating or there is
an open flame near the distributor. Minimum
dry chemical capacity of the fire extinguisher
should be 10 pounds.
Figure 16. Outfire Controlled Burner System
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.
When the desired product temperature is reached:
Close the main fuel supply valve at the tank.
After all the fuel is burned and there is no flame at
either burner, turn both bleeder valves fully clockwise
and close the positive cut off valve at the burners.
Close the exhaust stack dampers to prevent heat loss.
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.