How To Use The Burner - Maintenance - baltur BT 75 DSPN Manual De Instrucciones

HOW TO USE THE BURNER
This burner is fully automatic; the burner is cut-in by switching on
the main switch and the control panel switch.
Burner operation is controlled by commend/control devices as
described in the chapter (Fuel oil operation").
The "locked" position is a safety position that the burner automati-
cally enters when a burner or system part is inefficient; it is therefore
advisable to make sure there are no faults in the heating system,
before cutting-in the burner again by "unblocking" it. The burner
can remain in locked position for any length of time.
To unlock it, press the appropriate button (unlocking). Lock situa-
tions can also be caused by temporary faults (water in the fuel,
air in the pipes, etc.); in these cases, the burner operates without
any trouble, after unlocking.
If however, locking occurs repeatedly ( 3 - 4 times), do not continue
unlocking, but check that fuel reaches the burner and call for help
from the Service department in your area. They will remedy the
fault.
MAINTENANCE
The burners do not require any special maintenance; it is however
advisable, at least at the end of the heating season, to carry out
the following operations:
1) Remove and carefully clean the following with solvents (petrol,
trichloroethylene or wash-oil) : filters, sprayer, turbulation disk,
and ignition electrodes. Avoid using metal objects to clean the
nozzle (use wood or plastic).
2) Clean the photoresistance.
3) Get a specialist cleaner to clean the boiler and, if necessary,
the flue; a clean boiler gives better performance, has longer
life and is quieter.
VARIANTS FOR BURNERS PROVIDED WITH STE-
AM PRE-HEATER TO HEAT THE FUEL OIL
The burner can be provided with a pre-heater of the fuel oil which
operates with steam; the fuel will be heated by steam and there will
be a consequent saving in electricity. This device consists of a small
tank in which steam circulates and inside the tank is a coil in which
the fuel oil to be heated circulates. This particular device permits
a notable reduction in the dimension of the pre-heater. When the
burner starts up, cold fuel oil would be forced to pass through the
coil of the steam pre-heater still cold because it would not yet have
been heated by the steam. The high viscosity of the fuel (cold), the
notable development (length) of the coil its relatively small diameter
(necessary in order to obtain a high thermal exchange), would
determine a strong pressure loss and consequently the fuel would
Steam Pressure
at manometer bar
Approximate
Corresponding
Temperature °C
1 1,5 2 2,5
120 127 133 138
21 / 31
98321_2010/03
reach the nozzle at insufficient pressure. To avoid this situation,
the steam pre-heater has been provided with a manual-controlled
by-pass which prevents, when open, the fuel passing through the
coil (see BT 8576).
Installation
The user should provide and install on the pipeline that
takes the steam to the fuel heater the following: a gate
valve, a suitable pressure reducer (adjustable from 1 to 8
bar) and a control manometer (end of the scale 10 bar).
Do not recuperate the condensate which is discharged from the
heater to avoid, in case there is a leak in the coil, fuel oil going
into the steam system.
Regulation
When the boiler has reached sufficient pressure, open the gate valve
which a llows t he s team i nflow t o r each t he o il p re-heater, a nd o pen s lightly
the "air discharge" gate valve fitted on the condensate outlet pipeline.
While the steam is discharging from the gate valve slightly opened,
regulate the pressure reducer at a sufficient value in order to heat
the fuel oil to a temperature a little above (about 10÷15° C) that
at which the regulation thermostat of the electric heater has been
set. An orientative regulation can be carried out by operating the
pressure reducer in function with the value indicated by the mano-
meter; if necessary, correct the regulation after having controlled
the temperature of the fuel coming out of the steam heater.
When regulation has been carried out, close the air discharge gate
valve. The thermostats (minimum and regulation) of the electric
pre-heater should be regulate normally as described in Chapter
"Start up and Regulation".
3 3,5 4 4,5
143 147 151 155
5 6 7 8
158 164 169 174
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