baltur TS 0 GN, Инструкция по эксплуатации

Страница: 22 / 96

20
It should be remember that, in order to regulate properly, the water in the system should be at the right tempera-
ture and the burner should have been operating for at least 15 minutes. If the appropriate instruments are not
available, judgement can be based on the colour of the flame. We advise regulating in such a way as to obtain a
flame bright orange in colour. Avoid a red flame with smoke in it, or a white flame with an exaggerated excess of
air. After having checked the air/fuel regulation, tighten the locking screws of the adjustable screws.
21) Control that the modulation motor functions automatically by putting the AUT - O - MIN switch in the “AUT”
position and the MIN - O - MAX switch in the “O” position. In this way, the modulation motor is turned on exclusively
by the automatic command of the boiler’s probe. Normally, it is not necessary to alter the internal settings of the
Potentiality Regulator RWF.... (See instructions relative).
22) Check that regulation of the pre-heater’s thermostat does not cause any defects
(bad ignition, smoke presence, formation of gas in the pre-heater, etc.).
If necessary, higher or lower these values keeping in mind that the thermostat should be regulated at a tempera-
ture of about 15 ÷ 20 °C higher than that at which the minimum thermostat is regulated. The minimum thermostat
must close at the minimum temperature indispensable in order to obtain good atomisation (viscosity at the nozzle
should not exceed 2 °E). For further information, see the Viscosity-Temperature diagram with regard to the type of
oil used.
REGULATION OF THE COMBUSTION HEAD AND FLAME DISK
(See BT 8869/1)
The burner is equipped with a combustion head which can be regulated (by moving it backwards or forwards) in such
a way as to close more open more the air passage between the disk and the head. By throttling the passage, it is
possible to achieve high pressure upstream the disk, and therefore high velocity and air turbulence for low inputs as
well. High velocity and air turbulence ensure better penetration in the fuel and are therefore an optimum mixture and
allow the burner to operate with good flame stability. High air pressure, upstream the disk, might be necessary in order
to avoid flame pulsations, and it is considered practically indispensable when the burner is operating with a pressurized
furnace and/or high thermal load. It is evident from above, that the position of the device which regulates the air on the
combustion head should be put in such a position as to always obtain a decidedly high air pressure value behind the
disk. It is advisable to regulate in such a way as to achieve a throttling of the air between the disk and the head; this will
necessitate a considerable opening of the air shutter which regulates the flow to the burner’s fan section.
In order to obtain this condition operate on the modulation disk screws.
Once the regulation has been carried out lock the fixing screws of the adjustable screws.
The distance between the disk and the nozzle, regulated by the manufacturer, must be reduced only if the atomized
fuel cone coming out of the nozzle wets the disk and fouls it up.