baltur BT 75 DSPN /D, Instruction For Burners Model

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IGNITION AND REGULATION WITH FUEL OIL
1) Check that the nozzle characteristics (output and spray angle) are suitable for the furnace (see BT 9353/1).
If not, replace the nozzle with one of the right type.
2) Check there is fuel in the tank and that it is suitable (at least judging by its appearance) for the burner.
3) Check there is water in the boiler and that the equipment gates are open.
4) Make absolutely sure that combustion waste can be freely discharged (boiler gate and flue open).
5) Check that the voltage of the connecting power supply line corresponds to burner voltage. Also check that
electric connections on motors and elements are correctly installed according to the voltage available. Check
that all electric connections carried out on the premises have been done correctly according to our wiring
diagram.
6) Make sure that the blast-tube penetrates into the furnace to the depth called for by the boiler manufacturer.
Check that air regulation device on the blast-tube is in the position considered suitable for the desired fuel
supply (the air passage between disk and blast-tube must be well closed for low volume fuel supply. Vice-
versa, if the nozzle has a high output, the passage should be relatively open). See the chapter “Blast-tube
regulation”.
7) Remove the protective cover on the rotating disk, fitted to the modulation motor. The adjusting screws for
controlling fuel and combustion air are fitted here.
8) Set the two modulation switches to the “MIN” (minimum) and “MAN” (manual) positions.
9) Check that the setting of the two pre-heater thermostats (one for minimum level, the other for regulation) is
suitable for the type of fuel you wish to use. Once you know the nominal viscosity value for the fuel you wish
to use, you can find the exact fuel oil pre-heating temperature on the viscosity-temperature diagram.
Bear in mind that fuel must reach the nozzle at a viscosity not exceeding 2° E. To avoid interference which
would stop the burner operating, the regulation thermostat should be set to a temperature 15÷20° C higher
than the minimum level thermostat. After igniting the burner, check that thermostats operate correctly, by
reading the thermometer on the pre-heater. Set to about 50° C the thermostat that controls the resistance
built into the line filter.
10) Put the auxiliary fuel circuit into operation, checking its efficiency and setting pressure to about 1 bar.
11) Remove the cap from the pump vacuum gauge take-off point. Then slightly open the gate on the fuel inflow
tube. Wait till fuel flows out of the hole without any air bubbles and close the gate.
12) Fit a pressure-gauge (with scale minimum of about 3 bar) to the pump vacuum-gauge take-off point and
check the pressure of the fuel flowing into the burner pump. Fit a pressure-gauge (with scale minimum of
about 30 bar) to the pressure-gauge take-off on the pump, and check its working pressure. Fit a pressure-
gauge (with scale minimum of about 30 bar) to the return pressure take-off to check the value determining
output (see BT 8712/3).
13) Now open all the gates and any stop-cocks etc., on the fuel pipes.
14) Set the switch on the control panel to “O” position (open) to avoid cutting-in the elements on an empty tank,
and cut-in power to the electric line to which the burner is connected. Check that the two motors (fan and
pump) turn in the right direction (do this by pushing the relevant remote switches manually). If necessary,
change over two of the main power line wires in order to reverse rotation direction.
15) Put the burner pump into operation. Do this by pressing the relative remote switch until the pump working-
pressure metered by the relative pressure gauge indicates slight pressure. If there is low pressure in the
circuit, this means that pre-heater tank has been filled.
16) Switch on the control panel switch to cut-in power to the equipment. This in turn switches on (via a command
from the relative thermostat) the elements heating fuel in the tank and the line filter. At the same time, heating
elements for the atomizer unit and pump are cut-in (this only applies to models ....D). Cutting-in of elements is
indicated by the pilot-lamp on the control panel.