Unigas TN90, Руководство по установке, использованию и обслуживанию

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CIB UNIGAS - M039259CA
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ADJUSTMENTS
Adjustments - brief description
Adjust the air and fuel flow rates at the maximum output (“high flame”) first, by means of the air damper and the adjusting cam respec-
tively.

Check that the combustion parameters are in the suggested limits.

Check the nozzle flow rate.

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/fuel ratio in those points, regulating the opening-closing of the fuel governor.

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.
Adjustment procedure
1 Check the fan motor rotation.
2 With the electrical panel open, prime the oil pump acting on the related CP contactor (see next picture): check the pump motor
rotation and keep pressed for some seconds until the oil circuit is charged;
3 bleed the air from the M pressure gauge port (Fig. 11) by loosing the cap without removing it, then release the contactor.
Fig. 11
4 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 achieve safely the high flame stage;
5 Turn the burner on by means of its main switch: if the burner locks press the RESET button on the control panel - see wiring dia-
grams.
6 Start the burner up by means of the thermostat series and wait until the pre-purge time comes to an end and the burner starts up;
7 drive the burner to high flame stage, by means fo the thermostat TAB .
8 Then move progressively the microswitch to higher values until it reaches the high flame position; always check the combustion
values and eventually adjust the oil pressure (see next step).
ATTENTION: before starting the burner up, be sure that the manual cutoff valves are open and check that the pres-
sure upstream the gas train complies the value quoted on paragraph “Technical specifications”. Be sure that the
mains switch is closed.
Before starting up the burner, make sure that the return pipe to the tank is not obstructed. Any obstruction would
cause the pump seal to break.
. ATTENTION: During commissioning operations, do not let the burner operate with insufficient air flow (danger of formation
of carbon monoxide); if this should happen, make the gas decrease slowly until the normal combustion values are achieved.
IMPORTANT! the combustion air excess must be adjusted according to the in the following chart:
Recommended combustion parameters
Fuel
Recommended (%) CO
2
Recommended (%) O
2
Heavy oil 11 ÷ 12.5 4.7 ÷ 6.7
Suntec TA..
CP
VR
M