Bacharach INSIGHT 6.6Gas Pump Replacement, 6.7Cleaning the Probe, 6.8Error Messages, Procedure

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.

6.6Gas 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.

6.7Cleaning 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.

Fyrite® INSIGHT

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.

6.8Error 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.

50 Instruction 24-9460 Instruction 24-9460 51