Performing A Combustion Test - Bacharach PCA2 Instruction, Operating & Maintenance

4.5 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 4.3).
• Inset probe into stack (Section 4.4).
• If necessary, insert optional primary air thermocouple into combustion-
air stream of burners that use an outside source of combustion air.
1. Press the button to start the test.
RUN/HOLD
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 field 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 efficiency 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-flow 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 4.9)
4. Pressing the button freezes all readings, stops the pump and
RUN/HOLD
displays the Combustion-Test HOLD screen. Press the
all test values at the moment the
again restarts the pump and resumes testing.
RUN/HOLD
Instruction 24-9448
Operation
RUN NATURAL GAS
O 4.0 %
2
CO 12 ppm
EFF 82.6 %
CO 9.5 %
2
T-STK 374 °F
T-AIR 68.0 °F
EA 21.3 %
CO(O) 13 ppm
PRINT MENU
F1 F2
button to view
ENT
button was pressed. Pressing
RUN/HOLD
Operation
4.16.3 Recovering Data
Before data can be recovered from the analyzer, install the PCA 2 Data
Recovery Program, USB cable, and USB device driver as described in Sec-
tions 4.14.1 and 4.14.2.
Recover either the logging or combustion data as follows:
1. Start the program by either double-clicking the PCA2 icon
on the Windows desktop, or clicking the PCA2 shortcut in
start menu. The "Bacharach PCA 2 Data Recovery Program"
window should appear.
Observe that the window is divided into two sections. The left-hand sec-
tion is used to recover logging data, while combustion data is recov-
ered from the right-hand section.
In the following steps, the logging data will be recovered. The same pro-
cedure can be used to recover combustion data using the right-hand
section of the window.
SAVE
F3
2. Select where the downloaded file containing the recovered data will be
located and give it a filename by clicking the Open Log File button.
The following example screens show that the downloaded file will be
placed into a pre-existing PCA2 Logging Data folder and given the
filename Customer XYZ.
4-5 4-26 Instruction 24-9448