Operating Instructions For TD/TAD4 Dual Fuel Burner
June 13 67 of 165 TD/TAD4 Manual Rev 4
7 Commissioning
7.1 Basic settings
It is essential that heat output of the appliance is known in order that the correct fuel input can be
calculated and set. If there is any doubt at all with regard to the appliance rating, the manufacturer
should be consulted before the burner is fired. The calorific value of the fuel must be known and
measurement of the fuel input should be by meter wherever possible.
Do not leave the burner firing at a rate which is known to be or which may be excessive, this will
result in damage to the appliance.
The nett flue gas temperature should be taken throughout the process of setting combustion. The
figure will vary according to the construction of the appliance but will normally be in the range
of 180° to 250°C gross. – if in doubt what this figure should be, please consult the boiler/appliance
manufacturer.
Calculation of burner firing rate ( output ).
Qf = Burner Firing Rate ( Output ) kW
Qn = Boiler nominal thermal output ( kW )
k = Boiler Efficiency
Calculation of Gas Throughput at Nominal Boiler Output
Vb = Gas Throughput ( Fuel Input ) m
3
h.
Qn = Boiler nominal thermal output ( kW )
k = Boiler Efficiency
HU = Calorific Value of Fuel under Normal Conditions ( kWh/m
3
)
Calculation of Gas Throughput for Boiler Firing Rate
Vb = Gas Throughput ( Fuel Input ) m
3
h.
Qf = Burner Firing Rate ( Output ) kW
HU = Calorific Value of Fuel under Normal Conditions ( kWh/m
3
)
The indicating scale on the air damper motor is calibrated so that zero represents the fully closed
position for the air damper. The indicated low fire and high fire positions will be the result of the
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