22
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
To change the burner setting during the testing in the plant, follow the next procedure, according to the actuator model provided (mod.
Siemens SQM40.., Berger STM30.. or mod. Siemens SQL..).
Oil Flow Rate Settings by means of Berger STM30../Siemens SQM40.. actuator
1
Check the fan motor rotation (see page 19).
2
with the electrical panel open, prime the oil pump acting directly on the related
CP
contactor (see next picture): check the pump
motor rotation and keep pressing for some seconds until the oil circuit is charged;
3
bleed the air from the
M
pressure gauge port (Fig. 22) by loosing the cap without removing it, then release the contactor.
Fig. 22
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
A
: if the burner locks (LED
B
on in the control panel) press the RESET button (
C
)
on the control panel (see next picture) - see chapter “OPERATION” on page 30.
ATTENTION:
before starting the burner up, be sure that the manual cutoff valves are open. 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 fuel 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
Light oil
11.5 ÷ 13
2.9 ÷ 4.9
Suntec TA.
Suntec T..
CP
VR
M
M
VR
