baltur BT 75 DSNM-D, Инструкция

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1) Check that the nozzle characteristics (output and spray angle) are suitable for the combustion chamber
(see BT 9351/1). Otherwise, replace the nozzle, fitting one of the right type.
2) Check that there is fuel in the main tank and that fuel is suitable for the burner, to judge by its appearance at least.
3) Check there is water in the boiler and that the plant gates are open.
4) Make absolutely sure that discharge of combustion waste cannot occur without hindrance
(boiler gates and chimney open).
5) Check that the operating voltage of the electric line corresponds to what the burner requires and that electrical
connections of the motors and resistances are correct for the available voltage level. Also check that all electrical
connections carried out locally have been done properly according to our electrical diagram.
6) Make sure that the combustion head penetrates into the combustion chamber to the extent specified by the boiler
manufacturer. Check that the combustion head is in the position considered suitable for supplying the desired
quantity of fuel (for relatively low fuel supply the air passage between disk and head must be considerably reduced;
for fairly high nozzle output the passage between disk and head must be relatively open) - see the chapter
“Combustion head regulation”.
7) Remove the cover of the air damper motor. Following the specific instructions (see BT 8655/1), put the 1st flame
air regulation cam in the position considered suitable for supplying sufficient air to the 1st flame. In the same way,
set the position of the second flame air regulation cam. You then set the solenoid valve cutting-in cam (to cut-in
the 2nd flame) in an intermediate position between the cam positions mentioned above.
8) Disconnect, if already connected, the second flame thermostat or pressure switch to avoid cutting-in the second flame.
9) Check that the setting of the two thermostats (minimum level and regulation thermostats) is suitable for the type
of fuel intended to be used. If the nominal value of fuel viscosity is known, the exact value of fuel oil pre-heating
temperature can be verified on the viscosity-temperature graph. Bear in mind that fuel must reach the nozzle at a
viscosity not exceeding 2° E. To avoid snags which would lead to burner stoppage, the regulation thermostat
should be set at a temperature 15 ÷ 20° C higher than the minimum level thermostat.
After you have ignited the burner, check that the thermostats are operating correctly, by reading the appropriate
pre-heater thermometer. Set the resistance control thermostat mounted on the line filter to about 50 °C.
10) Run the auxiliary fuel feed circuit, checking for efficiency and setting pressure to about 1 bar.
11) Remove the plug on the vacuum gauge connection point of the pump and then slightly open the gate on the fuel
supply pipe. Wait until fuel out of the hole without any air bubbles and then close the gate.
12) Fit a pressure gauge (about 3 bar at the bottom of the scale) at the connection point of the vacuum gauge on the
pump in order to check the pressure level of the fuel as it enters the burner pump. Fit a pressure gauge (about 30 bar
at the bottom of the scale) to the pressure gauge connection point on the pump to check the working pressure of the
pump. Fit a pressure gauge (about 30 bar at the bottom of the scale) to the appropriate connection point of the first
flame return pressure regulator (see BT 8713/1) in order to check the first and second flame return pressure.
13) Now open all gates and any other flow stopping valves on the fuel pipe-line.
14) Turn the switch on the control panel into the “O” (OFF) position to avoid cutting-in resistances when the tank is
empty, and cut-in current to the electric line to which the burner is connected. Press the relative remote switches
manually to check whether the two motors (fan and pump) turn in the right direction and if necessary, change over
the two main line wires to reverse the turning direction.
15) Run the burner pump, manually pressing the relative remote switch till the pressure gauge, which shows the pump
working pressure, indicates slight pressure. Low pressure in the circuit confirms that the pre-heating tank has been filled.
16) Cut-in the control panel switch to feed current to the control box. This way, the resistances heating the fuel in the
tank and the resistance line filter are cut-in by commend of the relevant thermostat. The heating resistances for
the atomizer unit and the pump are cut-in at the same time. An appropriate pilot-light on the control panel indicates
cutting-in of the resistances.
17) The minimum level thermostat closes when fuel contained in the pre-heater reaches the temperature at which
the thermostat is set. Closure of the minimum level thermostat does not cause immediate cut-in of the burner
control box. This control box cut-in by the regulation thermostat (contact by commutation) when the latter cuts-out
the resistances because fuel temperature has reached the level at which the regulation thermostat has been set.
Burner start-up therefore only begins, provided the boiler and safety thermostats or pressure switches are closed,
when the resistances have been cut-out and maximum pre-heater temperature has been reached. As the burner
operates, an appropriate auxiliary relay (part of the minimum level thermostat) avoids it stopping when the regulation
thermostat commutates the contact to cut-in the resistances once again (see electric diagram). When the control
box is cut-in the burner ignition stages begin.
IGNITION AND REGULATION