baltur TBML 120 MC, Original Instructions Manual

Page: 24 / 208

13
12
acc_reg001.psd
TBML
80MC 003.psd
22 / 34
0006081545_201305
ENGLISH
IGNITION AND ADJUSTMENT
WITH METHANE GAS
Adjusting power upon first start-up
• position the first flame gas flow adjustment cam on the electric
servomotor to an opening angle approximately between 15° and
20° (000293). If it exists, open the safety valve flow regulator
completely.
• Now switch on the switch (1). The command equipment
thus receives voltage and the programmer causes the
burner to switch on as described in chapter “OPERATION
DESCRIPTION”. During preventilation, 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 (4) is not
switched on, nor are the gas valves (5) and so the equipment
is stopped in “lock-out” (7) mode.
• On first switching on repeated “lock outs” may occur due to the
following reasons:
- The gas piping has not been vented correctly and so there is
not enough gas to provide a stable flame.
- The “lock out” with flame present may be caused by flame
instability, due to an incorrect air/gas ratio.
- Correct the air flow in first stage using the screw(s)
( 1 2 ) , c o r r e s p o n d i n g t o t h e b e a r i n g ( 1 3 ) .
- in a clockwise direction the air flow increases,
- in an anti-clockwise direction the air flow decreases.
ADJUSTMENT OF SECOND STAGE POWER.
• After first ignition adjustment, switch off the burner and activate
the electric circuit that controls the activation of the second stage.
Set the switch on the printed circuit to the 2
nd
stage position.
Ensure that the gas flow adjustment cam in the second
stage of the electric servomotor is positioned at 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 adjust air and gas flow according to the
procedures described below:
- Adjust the gas flow using the valve pressure regulator, until
you obtain optimal combustion values, without modifying the
initial air setting for diesel oil. Consult the instructions related
to the single stage gas valve model installed. 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 (C0
2
max= 10%, O
2
min=3%, CO max=0,1%)
ADJUSTMENT OF FIRST STAGE POWER.
After having adjusted the burner in the second stage, put the burner
into the first stage. Set the switch on the printed circuit to the 1
st
stage position without varying the adjustment of the gas valve already
performed in point 5a.
- Adjust the gas flow in the 1
st
stage to the desired value using
the electric servomotor.
- If necessary, correct the combustion air supply adjusting the
screw(s) (12) as described previously.
- Check the combustion parameters in the 1
st
stage with
appropriate instruments (C0
2
max= 10%, O
2
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 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 operation of the air pressure switch you
must, with burner on and in 1
st
stage, increase its adjustment
until it is triggered and immediately “locks-out” the burner.
Release the burner by pushing the appropriate button (8) and
readjust the pressure switch to a sufficient value to detect the
existing air pressure during the preventilation phase of the 1
st