Ratiotronic Programming; Setting The Servo Motors; Burner Commissioning; Combustion Values And Results - dunphy TD Operating Manual

7.6.4 Ratiotronic programming

The Ratiotronic 6000 burner control system is generally pre-programmed in the factory prior to
despatch. However it is important that the parameters are checked against the lists supplied with the
test data supplied with the burner.
The combustion engineer must be competent with such a controller and be fully trained in burner
commissioning before proceeding any further.
This manual must be used in conjunction with the Ratiotronic 6000 manual at all times.

7.6.5 Setting the servo motors

Please refer to section 5 of the Ratiotronic manual.
In general the drive servo motors are allocated as follows:
Drive 1: Gas Butterfly valve
Drive 2: Oil Metering Valve
Drive 3: Air damper servo motor
Drive 4: Inverter

7.6.6 Burner Commissioning

All burners using oil as a fuel are fired before despatch as part of the standard test programme. This
does not mean that the pump pressure or any other adjustment applying to the oil system is
necessarily correct for the application.
Please now refer to 'Section 6.6 Commission Ratio Mode' of the Ratiotronic 6000 manual for
details on how to commission the burner.

7.6.7 Combustion values and results

All combustion readings must be taken with an approved and correctly calibrated test kit.
The following combustion values should be reached:-
Low Fire
CO content 0 - 20 ppm
CO content 9 - 11 %
2
O content 5 - 2%
2
High Fire
CO content 0 - 20 ppm
CO content 10 - 11%
2
O content 3.6 - 2%
2
In all cases the CO figure should not exceed 100mg/m
The nett flue gas exit temperatures should be taken throughout the process of setting the
combustion.
The figures will vary according to the type of appliance but for shell and sectional boilers will be in
the range of 180 - 250C gross.
Always keep the exhaust flue gas temperatures within the manufacturers recommended
range and ensure that the appliance is not over or under fired. Warm up the boiler, or raise
steam in accordance with appliance manufacturer's instructions.
June 13
Operating Instructions For TD/TAD4 Dual Fuel Burner
3
maximum.
76 of 165 TD/TAD4 Manual Rev 4