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STARTING UP AND REGULATION
Before starting up, make sure that:
a)
Connections to the supply line, to thermostats or pressure switches, have been made exactly according to the
electrical diagram of the control box.
b)
There is fuel oil in the cistern and water in the boiler.
c)
All the gate valves fitted on the fuel oil suction and return pipelines are open.
d)
The discharge of combustion products can take place freely (boiler and chimney lock-gates should be open).
e)
The nozzle applied to the burner matches the boiler's capacity but, if necessary, substitute it with another nozzle.
Under no circumstances should the quantity of fuel delivered exceed the maximum amount required by the
boiler and the maximum amount permitted for the burner.
Remember that the combustion head is designed for nozzles with a 45° spray angle.
Then proceed as follows:
1)
Loosen the screw whichlocks the air regulator and this will open slightly to allow a flow of air necessary for
burner operations; then lock the air regulator in this position by tightening the screw.
2)
Connect the main switch and that on the burner. In this way, the resistances which heat the fuel oil are inserted
and; at the same time, the yellow indicator light is switched on.
3)
The minimum thermostat closes when the oil in the pre-heater reaches the temperature at which it has been set.
When the minimum thermostat closes, and if the other thermostats (room and boiler) are closed, the control box
will start functioning and connect the burner component devices according to its pre-established programme.
The unit starts up in this way, as described in the chapter "Descrption of Operation".
4)
When the burner is operating, proceed with regulating the air (as described in point 1), in order to obtain the
quantity of air considered necessary for good combustion. A control of combustion should be made with the
appropriate instruments; the percentage of Carbon Dioxide (CO
10% to a maximum of 13%, and the smoke number should not exceed 6 of the Bacharach Scale.
If the appropriate instruments are not available, judgement can be based on the colour of the flame.
We adwise regulating in such a way as to obtain a soft flame, bright orange in colour.
It should be remembered that, in order to regulate properly, the water in the system should be at the right
temperature and the burner should have been operating for about 15 minutes.
5)
Regulation of the pre-heater, of the minimum and regulation thermostats (max) has been carried out by the
manufacturer at values which might not be appropriate for the specific case.
It is therefore necessary, when carrying out a final inspection, to check that these values don't cause bad
combustion, smoke presence, formation of gas in the pre-heater, etc:
If necessary, higher or lower these values keeping in mind that the regulation thermostat should be at a tempe-
rature of about 15 °C higher than that at which the minimum thermostat is regulated.
The minimum thermostat must close at the minimum temperature indispensable until fuel arrives at the nozzle
with a viscosity rate not exceeding 2 °E. This is indispensable in order to obtain good atomization.
(For further information, see the viscosity - temperature diagram with regard to the type of oil used).
CHECKS
After starting up the burner, check the safety devices (photoresistant cell, shut down system, thermostats).
1)
The photoresistant cell is the flame control device and, if the flame should be extinguished during operations, it
must be capable of stopping the flow of fuel immediately (in one second).
(This check should be made at least one minute after start up).
2)
The burner should be capable of blocking itself (shut down); and remaining so, when the flame does not appear
regularly during the start-up phase within the time limit preset on the control box (five seconds after the electrovalve
closes). The shut down causes the immediate arrest of the burner and the red warning light is lit up.
To check the efficiency of the photoresistant cell and of the shut down system, proceed as follows:
a)
start up the burner.
b)
After about one minute, extract the photoresistant cell by pulling it out of its seat and simulate flame failure
(using a hand or a reg to close the window in the photoresistant cell support).
) in the smoke should vary from a minimum of
2
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