baltur TBG 85 P-V Manuel D'instructions Pour L'utilisation page 47

air/gas ratio in the ignition phase proceeding with the inverter
"VS" parameter adustments (see chapter FR EQ U EN CY
CONVERTER)
8) Having completed the adjustments for the first ignition, store
the setting in the inverter by exiting the programming mode
(see chapter FREQUENCY CONVERTER). Switch off the
burner and reconnect the previously disconnected 4 pole
connector. Ensure that the air flow regulation cam in the second
stage of the electric servomotor is positioned at 90°.
9) Adjustment of second stage power.
Reconnect power to the burner closing the main switch. 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 regulator: to this
end consult the instructions related to the single stage gas
valve model installed.
- To adjust the air flow rate, vary the rotation speed of the fan motor
in second stage then proceed with the adjustment of the inverter
V2 parameter (see paragraph: "FREQUENCY CONVERTER").
Progressively adjust the motor rotation speed and therefore
the air flow by pressing the inverter + or – keys, checking with
appropriate instruments that the combustion is correct (C0
max= 10%, O min=3%, CO max=0,1%). Having finished the
2
air and gas flow adjustment, check the actual gas flow rate
by reading the meter. Avoid keeping the burner running if the
capacity is greater than the maximum permitted amount for
the boiler, or there is a risk it could be damaged
10) Adjustment of first stage power.
Having finished regulating the burner in the second stage, put
the burner into the first stage without varying the regulation
of the gas valve already undertaken in point 9. With the aid of
appropriate instruments, attend to the regulation of the air and
gas flow according to the procedures subsequently described:
- To adjust the air flow rate proceed with the setting of the servo
control air adjustment cam in first stage (see 0002936390),
until the desired gas flow rate is obtained, as the rotation of
the gas throttle is derived from the rotation of the air shutter
- To adjust the air flow rate, vary the rotation speed of the
fan motor in first stage then proceed with the adjustment
of the inverter V1 parameter (see chapter "FREQUENCY
CONVERTER"). Progressively adjust the motor rotation
speed and therefore the air flow by pressing the inverter +
or – keys, checking with appropriate instruments that the
combustion is correct (C0
max=0,1%). Having finished the air and gas flow adjustment,
check the actual gas flow rate in first stage by reading the
meter.
11) Adjusting the air flow rate for ignition.
Ignition of the burner takes place with the air shutter and gas
throttle adjusted for first stage operation. Once adjustment
of the first stage has been carried out the burner needs to
be switched off with verfication that the ignition is not noisy.
In the event of pulsations during ignition, it is possible to "adjust"
the air flow rate for ignition proceeding with the adjustment
2
max= 10%, O min=3%, CO
2 2
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of the inverter Vs parameter (see chapter "FREQUENCY
CONVERTER"). It is often advisable to set Vs at a slightly
higher value than V1.
12) Adjusting the air pressure switch.
Put the burner into first stage operation and increase the air
pressure switch setting until the burner goes into lock-out.
Adjust the setting of the pressure switch to a level slightly below
the actual air pressure detected in first stage operation. Release
the burner and check that it starts up correctly.
13) Adjusting the air control pressure switch in second stage.
Put the burner into second stage operation and increase the
air pressure switch setting (see chapter "AIR PRESSURE
SWITCHES") until the burner goes into lock-out. Adjust the
setting of the pressure switch to a level slightly below the actual
air pressure detected. Release the burner and check that it
operates correctly in second stage.
14) The control pressure switches for the gas (minimum) are to
prevent the working of the burner when the pressure of the
gas is not as provided for. It is clear from the specific function
of the pressure switches that the control pressure switch for
minimum pressure must make use of the contact that is closed
when the pressure switch detects pressure greater than that
for which it is regulated. The adjustment of the minimum gas
pressure switch must therefore be carried out when the burner
is started up, in accordance with the pressure that is found at
the time. The triggering (i.e. the opening of the circuit) of any
of the pressure switches when the burner is running (flame on)
causes the burner to stop immediately. When first switching
on the burner it is essential to check the correct working of the
pressure switch.
15) Check the triggering of the flame detector (ionisation electrode).
Disconnect the jumper between terminals 30 and 31 on the
printed circuit board and switch on the burner. The equipment
must run through its cycle completely and, three seconds after
the ignition flame has formed, "lock-out". This check must also
be carried out when the burner is already on. Disconnecting
the 30 and 31 jumper, the equipment must immediately go into
its "lock-out" action.
16) Check that the boiler thermostats or pressure switches are
operating correctly (they must cause the boiler to shut down
when they intervene).
!
Check that the ignition takes place properly. In the event
that the mixer is too far forward, it may happen that the
speed of the delivery air is so high that ignition is difficult.
If this happens, the mixer must be shifted back by degrees
until it is in a position in which ignition occurs normally, and
this new position can be regarded as the final position.
We remind you that is preferable, in the case of the small
flame, to limit the quantity of air to the lowest amount
possible needed for safe ignition, even in the most difficult
circumstances.
Connect a microampmeter with a suitable scale to the terminals
and restart the burner. Once the flame has appeared it will be
possible to measure the ionisation current, the minimum value
of which ensuring the operation of the equipment is shown in the