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5-3
Flue Gas Analysis System Maintenance & Troubleshooting 5
TELEDYNE BROWN ENGINEERING
Analytical Instruments
5.1.4 Spray Nozzle
It will be necessary to clean the mineral deposits from the spray
nozzle periodically (see Figure 1). If water flow through the system dimin-
ishes significantly, it is an indication that the nozzle is plugged. The
nozzle can easily be <cleaned by removing it and soaking it in a 25%
hydrochloric acid solution.
CAUTION: Use extreme care when using hydrochloric acid. Do not allow
any solution to contact the skin or clothing. If acid contacts the
skin, flush the exposed areas continuously for 5 to 10 minutes
or until medical attention can be obtained. Do not breath hydro-
chloric acid vapors. Use only in an approved vented safety
hood.
5.1.5 Water Strainer
It may be necessary to clean the screen in the strainer periodically (see
Figure 1). This is accomplished by unscrewing the brass hex plug on the
front of the unit and removing the screen.
5.1.6 Filter Condensate Trap
Any accumulated water must be emptied from the condensate trap
before the water level reaches the filter element (see Figure 1). This is
accomplished by simply pressing sideways on the flexible drain spout on
the bottom of the bowl. The filter element should also be cleaned periodi-
cally by washing it with kerosene and blowing it dry with compressed air.
The part number of the element is listed in Table 3.
5.1.7 Combustible Sensor
The combustible sensor is installed along with the H-28 heater and
T-199 thermoswitch in the sensor unit enclosure. These components can be
removed for replacement, if required.