Nu-Way MG860-LN T3S Installation & Maintenance Manual
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Contents
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14E.06.99 • G. 21.09.1123 Leak check device (accessory)The leak check device is an automatic valve monitoring device. The two gas solenoid valves integrated inthe gas line are checked for integrity. After a controlled shutdown of the burner or forward before restartingthe purge time, the gas pressure is increased in the test line between the gas solenoid valves. After the testperiod expires, the burner control contact is enabled when the test line is tight. The leak check device ischecked for intrinsic safety before each start.If a leak has occurred (pressure drop in the test line), the leak check device goes into failure mode and theburner control contact is disabled.24 Start-upThe burner can be put into operation once the gas and electrical installation and assembly work has beencompleted.• Prepare your flue-gas analyser.• Set the air flap positioning motor as described in section 12.• Prepare your gas train as described in section 21, 22.• Switch on the burner.• After the burner is started, toggle the switch to stage 2 (high load).• Set the air flap to the desired output range (see adjustment table).• Set the gas pressure by adjusting pG2 (V) according to the necessary maximum burner output.• Check the flue-gas values (CO2, CO, O2). The CO2 level in the flue gas should be 9-10% for naturalgas (see section 20).• After correct adjustment of stage 2 (high load), toggle the switch to stage 1 (low load). Set the gaspressure by adjusting pG1 (N) as per the table.Check the flue-gas values and adjust if necessary (see section 20).• After making the adjustment, toggle the switch to stage 2 (high load) and check the flue-gas valuesagain.• The setting data must be logged once adjustment is complete.• Check the gas pressure controller after start-up.Close the ball valve slowly, the burner must switch off without triggering a fault.• Check the values again at full load and low load and make adjustments where necessary.• If the inlet flow pressure is higher than 20 mbar, set the gas pressure monitor to approx. 70-80% of theinlet flow pressures. |
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