baltur TBML 90P, Instruction Manual For Installation, Use And Maintenance

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NATURAL GAS IGNITION AND REGULATION
FIRST IGNITION POWER ADJUSTMENT
• Now turn on the burner panel switch START/STOP switch. The con-
trol equipment is powered and the programmer activates the burner
as described in the chapter “Operation description”. During pre-ven-
tilation, make sure that the air pressure switch changes its status. If
the air pressure switch does not detect sufficient pressure, the igni-
tion transformer is not switched on, nor are the gas valves, therefore
the equipment “locks out”.
• During the first ignition several “lock outs” may occur due to the fol-
lowing reasons:
• The gas piping has not been bled from air correctly and so there is
not enough gas to provide a stable flame.
• A “lock out” with flame presence could be caused by flame instability
due to an incorrect air/gas ratio. This can be solved by changing the
amount of air and/or gas supplied, so as to find the right ratio. The
same problem may be caused by incorrect air/gas distribution in the
combustion head. This can be solved through the combustion head
adjustment device, by closing or opening further the air passage
between combustion head and gas diffuser.
• Correct the air flow in first stage using the screw(s) (11) correspon-
ding to the bearing (12).
- Clockwise rotation increases air flow rate;
- In anticlockwise rotation the air flow decreases
SECOND STAGE POWER REGULATION.
• After adjusting the regulation for the first ignition, turn off the burner
and close the electrical circuit commanding inclusion of the second
stage.
• Check that the electric servomotor second stage
gas flow rate regulation cam is positioned on 130°.
• Switch the burner on again activating the main switch (1) on the
synoptic panel. The burner will switch on automatically and activate
the second stage. With the aid of appropriate instruments, attend to
the regulation of the air and gas flow according to the procedures
subsequently described:
• To regulate the gas flow operate the valve pressure regulator. Con-
sult the instructions related to the single stage gas valve model in -
stalled.Avoid keeping the burner running if the heating capacity is
greater than the maximum amount allowed for the boiler, to avoid
damaging it.
• Check the combustion parameters with appropriate instruments
(CO2 MAX=10% O2 MIN= 3% CO MAX=0.1%)
FIRST STAGE POWER REGULATION
After regulation of the burner in the second stage, return the burner
to the first stage. Set the switch on the printed circuit to the 1st stage
position without varying the adjustment of the gas valve already per-
formed previously.
• Set the first stage gas flow rate to the needed value, as described
above.
• Adjust the gas flow in the 1st stage to the desired value using the
electric servomotor.
• If necessary, correct the combustion air supply adjusting the screw(s)
(11) as described previously.
• Check the combustion parameters in the 1st stage with appropriate
instruments (CO2 MAX=10% O2 MIN= 3% CO MAX=0.1%)
• The air pressure switch prevents the opening of the gas valves if
the air pressure is not the foreseen one. The pressure switch must
therefore be adjusted to intervene closing the contact when the air
pressure in the burner reaches a sufficient value. If the air pressure
switch does not detect a pressure greater than that calibrated, the
equipment runs through its cycle but does not switch on the ignition
transformer and does not open the gas valves and so the burner
“locks-out”. To ensure correct working of the air pressure switch, you
must, with burner on and with first flame only , increase
the regulation until it is triggered and immediately locks-out the bur-
ner. To release the burner, press the release button and adjust the
pressure switch to a sufficient level to detect the existing air pressure
during the pre-ventilation stage.
TBML_ACC_REG_001
ENGLISH
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0006160079_202008