NTI Ti100-200 Installation And Operation Instructions Manual

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NTI Ti100-200 Installation And Operation Instructions Manual Manual pdf 23 page image

Ti Series Installation and Operation Instructions │Trinity238.0 GAS VALVE AND BURNER SET-UPSet-up of the Trinity Ti gas valve must be performed by a licensed Gas Technician. Failure to performthe set-up correctly may result in incorrect operation, component failure, property damage, seriousinjury or death.Gas Line PressureThe appliance gas valve is equipped with a line pressure test port; see Figures 8-1. Use the following procedure to measure thegas line pressure to the appliance to ensure if falls within the range given in Table 8-1:1. Turn the supply of gas to the appliance off.2. Open the bleed screw of the line pressure test port approximately 1-1/2 turns. This port is directly connected to the gas linefeeding the appliance.3. Force 1/4 ID tubing over the housing of the line pressure test port; install the other end of the tubing to an appropriate linepressure test gauge or manometer. Ensure both ends of the tubing make a tight connection.4. Open the supply of gas to the appliance and check for gas leaks.5. Observe the line pressure under static conditions and compare it to Table 8-1. The pressure will be greatest under staticconditions.6. With all other gas appliances in the application running, operate the burner to the maximum firing rate (See Table 8-2) andcompare the observed line pressure with Table 8-1. The pressure will be lowest during the maximum flow of gas.7. Adjust the gas line pressure to ensure the parameters in Table 8-1 are attained under all conditions. If possible adjust theline pressure to the "Nominal/Desired" value listed in Table 8-1, while the unit is operating at the maximum modulationrate, see Table 8-2.8. Continue observing the gas line pressure until the completion of the combustion analyses, in case adjustments need to bemade.9. Upon completion of the line pressure testing, return the bleed screw of the Line Pressure Test Port to the closed position.The line pressure is a function of the gas supply and is affected solely by field provided parameterssuch as line size and regulator settings. Under no circumstances can the appliance gas valve influenceor be used to adjust the gas line pressure.Failure to close the bleed screw of the Line Pressure Test Port will cause a severe leakage of gas,resulting in a fire or explosion causing property damage, serious injury or death.Table 8-1 Line Pressure and Combustion ParametersGas Line Pressure (inches wc) CO2 (%)* CO (ppm)Max.Nominal/Desired Min. Max. Min. Max.Natural 7 4 10.5 8.5 9.5 175Propane 11 8 13 9.5 10.5 175*Note: it is permissible to have higher CO2 values with the burner operating at the minimum modulation rate.Table 8-2 Minimum and Maximum “Gas Input Values” (Modulation Rates)Model Minimum Gas Input Value Maximum Gas Input ValueTi100 50 240Ti150 50 240Ti200 40 240Never leave the unit operating while producing Carbon Monoxide (CO) concentrations in excess of175ppm. CO concentration will be greatest with the boiler operating at the highest firing rate, thereforemeasure and make necessary adjustments with unit operating at the Maximum Gas Input Value, see Table 8-2. Failure to followthis warning may result in serious injury or death.DO NOT adjust or measure boiler Manifold Pressure as correct pressure is factory set. Field adjustmentcould result in improper burner operation resulting in fire, explosion, property damage or death.