Combustion Gas Analyzer Operation & Maintenance

Instruction 24-9460
50
Fyrite
®
INSIGHT
Instruction 24-9460
51
Fyrite
®
INSIGHT
7. Strip
1
/4 inch of insulation from each of the probe’s thermocouple
connector wires.
IMPORTANT: In Step 8, the thermocouple wires must first be twisted
together and then crimped.
8. Twist both red thermocouple wires together; insert them into the
supplied wire-splice connector; and then crimp the connector using
a pair of pliers. Repeat this step for the yellow thermocouple wires.
9. Reassemble the probe handle, being careful not to pinch the ther-
mocouple wires between the handle pieces. In addition, ensure that
the end of the thermocouple is in front of the rib molded into the
bottom handle piece; otherwise, the handle pieces will not fit tightly
together.
6.6 Gas Pump Replacement
Parts & Tools Required:
Replacement pump (P/N 24-3049)
Medium phillips screwdriver
Procedure:
1. Gain access to the gas pump by removing the rear case. Refer to Sec-
tion 6.1.
2. Disconnect J9 (pump) and J11 (Battery) connectors.
3. Lift the circuit board out of the unit.
4. Remove the screw that secures the pump to the board in order to
separate the pump from the board.
5. Remove tubing from pump.
6. Install new pump by reversing this procedure.
6.7 Cleaning the Probe
The probe tube and gas-sample hose will become dirty under normal use.
Note that the water trap’s filter element should prevent soot from reaching
the analyzer’s internal components. If the probe is not kept clean, it could
become clogged and restrict the flow of gas into the analyzer, resulting in
incorrect combustion test readings and calculations.
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NOTE: An analyzer that is used to test natural gas furnaces
normally requires less frequent cleaning than an ana-
lyzer used for testing coal or oil fired furnaces.
Equipment Required:
Alcohol
Aerosol can of automotive carburetor cleaner
Clean rag
Source of compressed air (optional)
Procedure:
1. Remove gas-sample hose from top of water trap.
CAUTION: Carburetor cleaner attacks plastic compo-
nents! Take precautions not to spray cleaner onto the
probe handle or analyzer.
2. Insert the plastic-spray tube of the carburetor cleaner into the gas-
sample hose, and then liberally spray carburetor cleaner through the
hose and out the probe tube.
3. After spraying, remove all the residual cleaner by repeatedly flush-
ing the gas hose and probe tube with alcohol.
4. Wipe off the surfaces of the probe and tubing with a clean rag.
5. Allow the parts to dry completely. If available, blow compressed air
through the probe to expedite the drying process.
6. Reconnect gas-sample hose to top of water trap.
6.8 Error Messages
O2 Sensor Missing - The O2 sensor is not installed.
T-STK Disconnected - The probe thermocouple is not connected to the
analyzer's T-Stack connector. Plug the probe thermocouple plug into the
T-Stack connector at the bottom of the instrument.
Bad Sensor - O2 sensor is too low and can not be calibrated in the instru-
ment and needs replaced.
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