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STARTING UP AND REGULATION
Combustion may be checked throughout the entire burner opera-
ting range by controlling the equipment manually.
Set the switch -3 to manual position (MAN).
Use the switch -9 to increase or decrease gas and air.
After completing the check, set the switch -3to automatic position
(AUT).
•
Check that there is water in the boiler and that the gate valves
of the system are open.
•
Check that the discharge of combustion products through the
boiler gate and flue gate take places freely.
•
Check that thee voltage on the mains meets the manufacturer
requirements and that all electrical connections made at the in-
stallation site are performed properly as illustrated in our wiring
diagram.
IGNITION OUTPUT REGULATION
• Position the ignition gas flow rate regulation cam on the electric
servomotor to an opening angle of 35° (see
Servomotor cam
regulation
). If fitted, open the valve flow rate regulator fully.
•
Now turn the switch null on. This powers on the control device,
and the programmer turns on the burner as described in the
chapter "Operation description". During pre-ventilation, make
sure that the air pressure control switch changes its status (from
the closed position without pressure measurement to the closed
position with pressure measurement). If the air pressure switch
does not detect sufficient pressure, the ignition transformer is
not switched on, nor are the gas valves, and so the equipment
is stopped in “lock-out” mode -10.
• On first switching on repeated “lock outs” may occur due to the
following reasons:
- The gas piping is not being freed of air correctly and so
there is not enough gas to provide a stable flame.
-
The “lock out” with flame present may be caused by instabi
-
lity in the ionisation area, due to an incorrect air/gas ratio.
• Correct the air flow using the screw(s) -11 near the bearing -12.
-
clockwise rotation: the air flow increases
-
anticlockwise rotation: the air flow decreases.
•
Proceed with the regulation of the air until a position is found
which allows ignition without resulting in blocking.
•
It may occur that the ionisation current is disturbed by the di-
scharge current of the ignition transformer (the two currents
have a common path on the burner’s “mass”) so the burner
locks out due to an insufficient ionisation. Invert the supply
(230V side) of the ignition transformer.
• This problem may also be caused by an insufficient “ground
connection” to the burner’s casing.
SECOND STAGE POWER REGULATION.
After completing first ignition adjustment, turn the switch -9
towards the maximum (MAX) so as to get the maximum air and
gas output.
Check that the electric servomotor second stage
gas flow rate regulation cam is positioned at 130°.
• To regulate the air flow rate, use the screws -12, and correct the
rotation angle of the air shutter and put it in the suitable position
to guarantee the right quantity for the power burned.
•
Check the combustion parameters with appropriate instruments
(C02 max= 10%, O2 min=3%, CO max=0,1%)
FIRST STAGE POWER REGULATION.
After having adjusted the burner at the maximum flame, return the
burner to the minimum flame. Turn the selector switch -9 towards
the minimum (MIN) without varying the adjustment of the gas val-
ve already performed.
• Regulate the 1st stage gas flow rate to the required value using
the servomotor's cam for minimum output regulation. (See Ser-
vomotor cam regulation).
•
If necessary, correct the combustion air supply adjusting the
screw(s) -12.
•
Check the combustion parameters in the 1st stage with ap-
propriate instruments (C02 max= 10%, O2 min=3%, CO
max=0,1%)
ADJUSTING THE FLOW RATE FOR IGNITION
•
Once regulation of the minimum output has been carried out,
the burner needs to be switched off and check that ignition
occurs properly. If necessary, it is possible to optimise burner
regulation during ignition, proceeding as follows:
-
Adjust the gas flow in the start-up phase, using the adjust
-
ment cam for ignition output adjustment. It is often advisable
to set the ignition cam at a slightly higher angle than the
minimum flame cam.
- If necessary, correct the combustion air supply adjusting the
screw(s) -11.
Summary of Contents for TBG 480 MC
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