Maintenance - baltur BT 75 DSPN /D Instruction For Burners Model

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 automatically 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 situations 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 performan-
ce, has longer life and is quieter.
VARIANTS FOR BURNERS PROVIDED WITH STEAM 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
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 allows the steam inflow to reach the
oil pre-heater, and open slightly 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 manometer; if necessary, correct the regulation after
having controlled the temperature of the fuel coming out of the steam heater.
Steam Pressure
at manometer bar
Approximate
Corresponding
Temperature °C
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".
1 1,5 2 2,5
120 127 133 138
3 3,5 4 4,5
143 147 151 155
46
5 6 7 8
158 164 169 174