Unigas KTP1030, Manual Of Installation - Use - Maintenance

Page: 31 / 149

C.I.B. UNIGAS - M039207CB
31
Adjustments - brief description
Adjust the air and gas flow rates at the maximum output (“high flame”) first, by means of the air damper and the adjusting cam respec-
tively.
z
Check that the combustion parameters are in the suggested limits.
z
Check the flow rate measuring it on the counter or, if it was not possible, verifying the combustion head pressure by means of a dif-
ferential pressure gauge, as described on par. “Measuring the gas pressure in the combustion head” on page 28.
z
Then, adjust the combustion values corresponding to the points between maximum and minimum: set the shape of the adjusting
cam foil. The adjusting cam sets the air/gas ratio in those points, regulating the opening-closing of the throttle gas valve.
z
Set, now, the low flame output, acting on the low flame microswitch of the actuator in order to avoid the low flame output increasing
too much or that the flues temperature gets too low to cause condensation in the chimney.
Now, adjust the burner according to the actuator model provided.
Adjustment procedure
To change the burner setting during the testing in the plant, follow the next procedure.
On the DUNGS MBC..SE gas valves group, set the pressure regulator to 1/3 of its stroke, using a 2.5 allen key.
1 Before starting the burner up, drive the high flame actuator microswitch matching the low flame one (in order to let the burner ope-
rates at the lowest output) to safely achieve the high flame stage.
2 cam IV (stroke limitation cam) must be set a little higher than the cam III to limit the output in the first seconds the flame appears;
NOTE: cam IV must shift according to cam III.
1 turn the burner on by selecting GAS fuel by means of the burner CM switch (it is placed on the burner control panel - see Ðèñ. 58)
2 check the fan motor rotation.
3 Before starting the burner up, drive the high flame actuator microswitch matching the low flame one (in order to let the burner ope-
rates at the lowest output) to safely achieve the high flame stage.
4 Start the burner up by means of the thermostat series and wait until the pre-purge time comes to an end and that the burner starts
up;
5 drive the burner to high flame stage, by means fo the thermostat TAB .
6 Then move progressively the microswitch to higher values until it reaches the high flame position; always check the combustion
values and eventually adjusting the gas by means of the valves group stabiliser.
7 go on adjusting air and gas flow rates: check, continuosly, the flue gas analisys, as to avoid combustion with little air; dose the air
Servocontrol cams
I High flame
II Stand-by and Ignition
III Low flame (gas)
IV Low flame (oil)
V Stroke limitation
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Pressure setting
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I II III IV