Nu-Way RGN 40 Installation & Maintenance Manual

Contents

Nu-Way RGN 40 Installation & Maintenance Manual Manual pdf 13 page image

13E. 04.99• G.13.11.02Start-upPrecision adjustment on KE 15:• At measuring point B measure gas nozzle pressure.Gas nozzle pressure ≤ 5mbar:• Start burner; if there is no flame formation, check adjustment.• After approx. 10 sec. correct starting gas pressure ps according to adjustment table.Gas nozzle pressure > 5mbar:•Start burner, if there is no flame formation, checkadjustment. If necessary adjust starting gas pressure P shigher (attention: always adjust P s ≤ P G)•After approx. 10 sec re-adjust main gas pressure P Gaccording to adjustment table.•Then adapt dimension "A" air flow setting (see table).Secure air setting with lock nut.•Perform an exhaust gas analysis, paying special atten-tion to eh CO emission.•Seal off all measuring points.Calculation principle for gas burner adjustmentThe values given in the tables are setting values for start-up.The necessary system adjustment must be newly determined in each case.General:The calorofic value (H i,n ) of fuel gasses is usually given for normal atmospheric conditions(0°C, 1013 mbar).Natural gas type E H i,n = 10.4 kWh/m 3Natural gas type LL H i,n = 9.3 kWh/m 3Gas counters measure the volume of gas in the operational state.Specifying throughput:To allow correct setting of the heat generator load, the gas throughput must be determined in advance.Example:Height above sea level 230 mAtmospheric pressure B (according to table) 989 mbarGas pressure P G at counter 20 mbarGas temperature ϑG 16°CBoiler rating Q n 100 kWEfficiency ηK (assumed) 92%Calorific value H i,n 10.4 kWh/m 3Gas flow in standard state (Vn )Air settingmeasurement "A"Exhaust gas valuesReduceif:CO2too lowO2too highIncreaseif:CO2too highO2too lowV nQ nηk H× i n,-------------------- 30kW0 92 10× 4kWhm3-----------, ,----------------------------------------= 3 1m3h-------,= =