baltur TBG 45 PN-V Manual User Instructions page 45

flow proceeding with the inverter "VS" parameter adjustments (see
chapter FREQUENCY CONVERTER)
10) The minimum thermal output adjustment
Put the burner to minimum thermal output modulation position (air
damper control servomotor at minimum) putting the modulation
connector (see section "instructions for manual operation
of burner") to the MIN position. With the aid of appropriate
instruments, attend to the regulation of the air and gas flow
according to the procedures subsequently described:
- Vary the rotation speed of the fan motor to the minimum 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 (C02 max= 10%, O2 min=3%,
CO max=0,1%). Check and adjust if necessary the air/gas
ratio use the pneumatic valve piston (for this purpose follow
the instructions relative to the installed gas train).
- Having finished the air and gas flow adjustment, check the
actual gas flow to the minimum modulation power rate by
reading the meter.
It is essential to check, with a suitable instrument, that the percentage
of carbon monoxide (CO) present in the fumes does not exceed
the limit set by regulations at the time of installation.
12) Put the modulation connector switch to the MAX position. The
air adjustment servomotor is put at maximum opening position
and consequently also the gas supply reaches the maximum
thermal output. Afterwards a check is carried out on the quantity
of gas supplied, 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. To
vary the maximum supply of gas output, use the airflow regulator
because the gas output automatically adjusts to the air supply.
It is therefore necessary to use the cam which adjusts the
maximum opening position of the air damper (see adjustment
instructions 0002933651) The opening angle of the air damper
has to be reduced to reduce the gas supply and viceversa. To
vary the air/gas ratio see the instructions for the pneumatic gas
valve installed.
13) Maximum thermal output adjustment.
With the aid of appropriate instruments, attend to the regulation of the
air and gas flow according to the procedures subsequently described:
Vary the rotation speed of the fan motor then proceed with
the adjustment of the inverter V2 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 (C02 max= 10%, O2 min=3%, CO
max=0,1%). Check and adjust if necessary the air/gas ratio use
the pneumatic valve piston (for this purpose follow the instructions
relative to the installed gas train).
- Having finished the air and gas flow adjustment, check the
actual gas flow to the maximum modulation power rate by
reading the meter.
It is essential to check, with a suitable instrument, that the
percentage of carbon monoxide (CO) present in the fumes does
not exceed the limit set by regulations at the time of installation.
14) After setting operation to the maximum thermal output, it is
necessary to put the air adjustment servomotor to the minimum
flow position, putting the modulation connector to the MIN
position. If necessary performing the final correction of the air/gas
ratio, following the instructions of the installed gas valve. It is very
important to carry out a combustion check using the appropriate
instruments at some points within the modulation range.
From the number of red lights on in the inverter display during
operation in the intermediate points the motor rotation speed V2
will vary in a continuous fashion between the minimum value V1
and the maximum V2. During operation in modulation the green
led related to V2 will stay lit.
15)Having finished the burner regulation, store the inverter settings
(see chapter "FREQUENCY CONVERTER"), remove the
modulation connector and restore the connection with the 4 pole
connector of the boiler thermostat line.
16) Adjusting the air pressure switch.
Put the burner into minimum thermal output operation and
increase the calibration value of the air pressure switch until
the burner goes into lock-out. Adjust the setting of the pressure
switch to a level slightly below the actual air pressure detected
at the minimum setting. Release the burner and check that it
starts up correctly.
17) The pressure switches for checking gas pressure (minimum
and maximum), if installed, prevent the burner from operating
when the gas pressure is not between the expected values. The
specific function of the pressure switches clearly reveals that
the pressure switch for controlling minimum pressure must use
the contact which is closed when the pressure switch detects a
pressure value above the value it is set to, while the pressure
switch for controlling maximum pressure must use the contact
that is closed when the pressure switch detects lower pressure
than the value it is set to. Minimum and maximum gas pressure
switches must be set when the burner is tested. Setting de-
pends on pressure detected from time to time. Tripping of any of
the gas pressure switches (in the sense of opening the circuit)
will therefore prevent the equipment and therefore the burner
from working. While the burner is operating (flame lit) the trip-
ping of the gas pressure switches (circuit opening) causes the
burner to stop immediately. When testing the burner, it is very
important to check that the pressure switches are working prop-
erly. By using the adjustment devices, it can be verified whether
the pressure switch that stops the burner actually operates (i.e.
opens the circuit).
18) Check the triggering of the flame detector (ionisation electrode)
by disconnecting the jumper between terminals 30 and 31 on
the printed circuit board and switching on the burner. The equip-
ment 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. Disconnect-
ing the 30 and 31 jumper, the equipment must immediately go
into its "lock-out" action.
19) Check the proper working of the boiler thermostats or pressure
switches (when triggered they must stop the burner).
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