Bacharach INSIGHT Manuel D’Utilisation

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4. Press ENTER to save the selection and re-

turn to the Combustion Test HOLD screen 

or ESC to revert to the previous setting and 

return to the MAIN MENU. 

Forced Air Furnace – When testing atmospheric burner or gravity 

vented, forced air heating equip ment with a clamshell or sectional heat 

exchanger design, test each of the exhaust ports at the top of the heat ex-

changer. The probe should be inserted back into each of the exhaust ports 

to obtain a flue gas sample, before any dilution air is mixed in.

Hot Water Tank – Domestic hot water tanks with the ‘bell’ shaped draft 

diverter on top can be accurately tested by inserting the probe tip directly 

into the top of the fire tube be low the diverter.

80% Efficiency Fan Assist or Power Vented – Combustion testing of 

fan assist or power vented, furnaces/boilers should be done through a hole 

drilled in the vent approximately 12 inches above the inducer fan.

90% Efficiency Condensing – Condensing furnaces/boilers can be tested 

through a hole drilled in the plastic vent pipe (when allowed by the manufac-

turer or local authority of jurisdiction) or taken from the exhaust termination.  

After testing, the hole should be sealed with high temperature silicon.

Atmospheric or Gravity Vented Boiler – Boilers, which have a ‘bell’ 

shaped draft diverter directly on top, should be tested directly below the 

diverter through a hole drilled in the vent connector.

NOTE: All drill holes should be sealed upon completion of combus-

tion testing.

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

combustion test as described below:

• Power ON analyzer and allow it to warm up (Section 4.2).

• Select fuel being burned (Section 4.3).

• Inset probe into proper sample location (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 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 

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 tempera-

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

will change quickly to show changes in burner  performance.

4. Pressing the RUN/HOLD button freezes all readings, stops the pump and 

displays the Combustion-Test HOLD screen. Use the ▲▼ buttons to view 

all test values at the moment the RUN/HOLD button was pressed.  Press-

ing RUN/HOLD again restarts the pump and resumes testing.

Display Name

Description of Measurement or Calculation

O

2

% Oxygen

CO              

ppm Carbon Monoxide

Eff               

% Combustion Effi ciency

CO

2

% Carbon Dioxide

T-STK

Stack Temperature

T-AIR

Primary/Ambient Air Temperature

EA              

% Excess Air

CO(O)

Carbon Monoxide ppm level referenced to a % of oxygen