Specifications

PCA

4.4 Performing a Combustion Test

Ensure that the following has been completed, and then proceed with the

combustion test as described below:

• Turn ON analyzer and allow it to

warm up (Section 4.2).

• Select fuel being burned (Section

3.5).

• Inset probe into stack (Section 4.3).

• If necessary, insert optional primary

air thermocouple into combustion-

air stream of burners that use an

outside source of combustion air.

1. Press the RUN/HOLD button to start the test. You should hear the

pump start running and see the word RUN appear at the top of

the Combustion Test screen.

Sensor Indicators: The following indicators appear in the

sensor’s data ﬁ eld depending on certain conditions:

(* * *) Sensor that is not calibrated or installed.

(XXX) Sensor overrange

(- - -) The calculated data cannot be displayed

because the measured data necessary to make the

calculation is out of range (i.e., oxygen level above

16%).

2. Use the up and down arrow keys to scroll to the T-STK reading.

Loosen the thumbscrew on probe stop and move probe in and

out of the stack until the stack’s core temperature (hot spot) is

located as indicated by the highest T-STK reading; then tighten

thumbscrew to prevent further probe movement. Locating the

highest stack temperature is very important for accurate efﬁ ciency

calculations.

3. You can now begin burner-service procedures. The analyzer

readings will change quickly to show changes in burner

performance.

CAUTION: Position the Water Trap with its gas-ﬂ ow arrow

pointing upward. Do not let water condensate go above the

tip of the riser tube. The sensors could be damaged if water

would enter the analyzer. Empty the Water Trap after every

combustion test (refer to Section 4.10).