ECA 450 MaintenanceInstruction 0024-9400 694.6 Cleaning the Probe and Sampling HosesIf the combustion analyzer is used on either coal or oil fired burners,particulates can accumulate within the probe and sampling hoses. Theseparticulates may, in time, build up and restrict the flow of gas into theanalyzer. Note that the probe’s water trap’s filter element should preventsoot from reaching the analyzer’s internal components. While using thecombustion analyzer, the type of fuels that cause the most dirt and how oftenthe system needs to be cleaned will become evident.Equipment Required:• Aerosol can of automotive carburetor cleaner• Alcohol• Mild liquid detergent• Method of forcing water through sampling hoses (see text)• Clean rags• Source of compressed air (optional)Procedure:1. If not already done, disconnect the probe’s gas and pressure fittings andits thermocouple connector from the analyzer.2. Remove gas and pressure hoses from barbed fittings on probe handle andgas hose from the water trap / filter assembly (Figure 4-5).CAUTION: Carburetor cleaner attacks plastic and rubber components.Take precautions not to spray carburetor cleaner onto the probe handle,sampling hoses, or analyzer.Figure 4-5. Cleaning the Probe and Sampling HosesWATER TRAP/FILTER ASSEMBLY GAS HOSEGAS HOSEPRESSUREHOSE
