Lattner HE Model Lattner WLF Model 3 HP To 9.5 HP 9.5 HP .

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LATTNER BOILER COMPANYLow-NOx BoilersLattner WLF Model9.5 HP to 50 HPLattner HE Model3 HP to 9.5 HP SCAQMD-Approved for California & TexasLess than 30 ppm NOx (corrected 3% O2)Lattner burner (see figure 3)Pre-mix combustion gas technologyImproved efficiencyTubeless; Very low maintenanceSmall footprintLarge hand holes for easy inspection andcleanout SCAQMD-Approved for California & TexasLess than 30 ppm NOx (corrected 3% O2)Webster power burner (see figure 4)Flue gas re-circulation technologyFour pass gas travelImproved efficiencyTubeless; Very low maintenanceRemovable panels for pressure vesselaccessLattner Boiler Company1411 9th St. SWCedar Rapids, IA 52404T: (319) 366-0778F: (319) 366-0770W: www.lattner.com

LATTNER BOILER COMPANYLow-NOx BoilersBasic Instructions for Start-Up of Lattner Low-NOx BoilersThe burner system of the Lattner low-NOx boiler consists of a gas valve with built-in pressureregulator, motor driven blower, pre-mix burner tubes and electronic ignition and flame monitoring.The system is basically similar to any boiler with a forced draft power burner and must be started ina similar fashion to any boiler with this type burner.In order to properly start the burner you will need the following items:1.2.3.4.5.6.7.8.9.10.Combustion analyzerStop watchCalculatorKnowledge of the BTU content of the fuel gas.Method of measuring the fuel gas input in cubic feet per hour.Formula for calculating BTU input to the burnerFormula for calculating NOx corrected to 3%. The maximum is 30 ppm.CO2 / O2 / Excess Air ratio curve chartCarbon monoxide tester“U” tube manometer or aneroid gas pressure gaugeBefore attempting to actually start the boiler, check the function of the low water cutoffs andpressure controls. The gas piping must be properly purged up to the point of connection to the gastrain. It is necessary to make sure the voltage to the boiler is correct.The boiler should then be started with the fuel gas shut off to make sure no valves will open duringthe burner pre-purge cycle. After this check is confirmed, the gas valve to the burner train can beopened and the burner started.It is absolutely necessary to determine the firing rate of the boiler by actually determining thevolume of fuel gas supplied to the boiler. Using a stop-watch and reading the fuel gas volume incubic feet for a specific period of time at the gas meter, the actual volume of gas in cubic feet perhour is calculated using the formula for calculating the BTU input to the burner. Further calculationusing the actual BTU per cubic foot of gas, the exact firing rate can be determined. (Contact thegas utility supplier to determine the BTU per cubic foot content of the fuel gas). Adjust the fuel gaspressure regulator on the combination gas valve until the BTU input matches the BTU input ratingof the boiler. As the fuel gas input is changed, readjustment of the air shutter will be required toprevent the loss of burner flame.Use the combustion analyzer probe to sample the flue gas below any draft regulator (if used). Ingeneral, the 02 reading obtained on the combustion analyzer may be around 4% or slightly higher.Adjust the air shutter on the burner blower to change the readings. As air shutter adjustments areLattner Boiler Company1411 9th St. SWCedar Rapids, IA 52404T: (319) 366-0778F: (319) 366-0770W: www.lattner.com

LATTNER BOILER COMPANYLow-NOx Boilersmade, the fuel gas pressure regulator will require minor adjustments to maintain the correct fuelgas BTU input to the burner. Any pressure regulator readjustment may also require minor changesin the air shutter adjustment.Adjust the air shutter while observing the NOx readings on the analyzer. Adjust the air shutter toobtain low NOx readings. The finalized burner adjustments are those that will produce the lowestcorrected NOx readings using the formula for calculating NOx corrected to 3% calculation. Boiler isSCAQMD certified for 30 ppm NOx.Check the flue gas content for carbon monoxide. The reading must be below 400 parts per millionbut preferably around 40 parts per million.The “U” tube manometer or aneroid gas pressure gauge is used only to observe any changes in themanifold gas pressure as adjustments are being made. After any adjustments are finalized, recordthese readings for future use. These readings will probably be about 2 Inches water columnpressure.Formula for calculating NOx corrected to 3% 02:Corrected value 17.9520.95 - 02%x ppm NOxLattner Boiler Company1411 9th St. SWCedar Rapids, IA 52404T: (319) 366-0778F: (319) 366-0770W: www.lattner.com

LATTNER BOILER COMPANYLow-NOx BoilersGas Input Determination by Gas Meter MeasurementThe gas input to a burner should be determined by “clocking” the gas meter. Failure to apply metercorrection factors can lead to over firing which could result in boiler damage or an unsafe operatingcondition.When determining gas flows using a gas meter, several factors must be considered to obtain anaccurate measurement. The inlet gas pressure and temperature to the meter must be determinedand the inlet gas pressure and temperature that was used to calibrate the gas meter must beknown.The calibration pressure (commonly referred to as base pressure) and temperature may be markedon the meter dial or nameplate. If this information is not on the meter then use 4 oz (7 iwc) asbase pressure and 60 F as the calibration pressure and temperature.The formula for calculating the gas flow is as follows:CFH Cu. Ft. x 3600 x Press. Corr. x Temp. Corr.TimeCFH – Cubic feet per hourCu. Ft. – Cubic feet of gas clocked3600 – number of seconds in one hourPress. Corr. – Correction factor for inlet gas pressure different than base pressure (see figure 1)Temp. Corr. – Correction factor for inlet gas temperature different than calibration temperature(see figure 1)Time – Time in seconds required to measure Cu. Ft.Example:For example, assume the meter is calibrated with a base pressure of 4 oz and temperature of 60 Fand you measure the inlet pressure to the meter as 5 psi with a gas temperature of 70 F. Youdetermine it takes 42 seconds for 50 cu. ft. of gas to flow through the meter. For 5 psi, thepressure correction factor is 1.324 and for the 70 F the temperature correction factor is .981. Thecalculation is:CFH 50 x 3600 x 1.324 x .98142CFH 5566 cubic feet per hour gas flowLattner Boiler Company1411 9th St. SWCedar Rapids, IA 52404T: (319) 366-0778F: (319) 366-0770W: www.lattner.com

LATTNER BOILER COMPANYLow-NOx BoilersFor heat input to the boiler, the CFH gas flow must be multiplied by the BTU content of the gas.Typically, the BTU content for natural gas is 1000 BTUs per cubic foot of gas and this number canbe used if the actual number is not known. In the above example, if the BTU content of the gas is1050 BTUs per cubic foot, then the heat input would be:Heat Input CFH x BTU per Cu. Ft. 5566 x 1050 5,844,300 BTUs per HourLattner Boiler Company1411 9th St. SWCedar Rapids, IA 52404T: (319) 366-0778F: (319) 366-0770W: www.lattner.com

LATTNER BOILER COMPANYLow-NOx BoilersFigure 1Lattner Boiler Company1411 9th St. SWCedar Rapids, IA 52404T: (319) 366-0778F: (319) 366-0770W: www.lattner.com

LATTNER BOILER COMPANYLow-NOx BoilersFigure 2Lattner Boiler Company1411 9th St. SWCedar Rapids, IA 52404T: (319) 366-0778F: (319) 366-0770W: www.lattner.com

LATTNER BOILER COMPANYLow-NOx BoilersFigure 3Lattner Boiler Company1411 9th St. SWCedar Rapids, IA 52404T: (319) 366-0778F: (319) 366-0770W: www.lattner.com

LATTNER BOILER COMPANYLow-NOx BoilersFigure 4Lattner Boiler Company1411 9th St. SWCedar Rapids, IA 52404T: (319) 366-0778F: (319) 366-0770W: www.lattner.com

LATTNER BOILER COMPANY Low-NOx Boilers Lattner Boiler Company 1411 9th St. SW Cedar Rapids, IA 52404 T: (319) 366-0778 F: (319) 366-0770 W: www.lattner.com Basic Instructions for Start-Up of Lattner Low-NOx Boilers The burner system of the Lattner low-