baltur BT 250 DSG 4T, Manual User Instructions

Page: 38 / 52

N° 8666/3
12 / 24
0006160029_201305
ENGLISH
HYDraULiC Diagram Of sUPPLY fOr One Or mOre DieseL BUrners
WiTH maXimUm nOminaL VisCOsiTY (5°e aT 50 °C)
1 - Main tank
2 - Filter
3 - Circulation pump
4 - Water and system outlet
5 -Air/gas outlet - normally closed
6 - Fuel and degasser recovery
7 - Non-return valve
8 - By-pass (normally closed)
The diesel fuel recovery tanks (diameter ~ 150, height ~ 400) should be installed as near as possible
to the burner and should be about 0.5 m higher with respect to burner pump.
USE OF THE BURNER
Burner operation is fully automatic. The burner starts up by enabling
the master and the control panel switch (1). Burner operation is
controlled by command and control devices, as described in the
chapter “Operation description”. The “lock-out” position is a safety
position automatically taken up by the burner when a particular part
of the burner or of the system is inefficient. Therefore, it is good
practice, before "resetting" the burner and starting it up again, to
check that there are no defects in the heating plant. The burner may
stay in the lock position without any time limits.
To unlock, push the appropriate button (2). Lock-outs can be caused
by transitory irregularities (a little water inside the fuel, air inside the
piping, etc.); in these cases, if the burner is locked it starts up as
usual. When, however, lock-outs occur repeatedly (3 or 4 times),
do not persist in trying to unlock the burner and after checking that
there is fuel in the tank, ask for the assistance of your local Technical
Assistance Service to repair the fault.
DESCRIPTION OF THE TWO-
STAGE BURNER OPERATION
The two stage burner always ignites with a limited amount of air and
fuel (1
st
flame) and, subsequently, after a few seconds, it will switch
to full air and fuel operation (2
nd
flame).
The ignition of the 2
nd
flame is subject to the authorisation of the
control box and control device (pressure switch or thermostat).
When the burner works at full rate it will remain in this position until
it reaches the pressure or temperature limit pre-set on the control
device (pressure switch or thermostat). The control device trips,
disconnecting the 2
nd
flame (fuel and air), when the limit to which it
has been pre-set is reached. Then the burner works only with the
1
st
flame.
Normally the 1
st
flame alone is not sufficient to keep the temperature
or the pressure at the required limit, and so it will decrease until it
reaches the limit to which the control device of the 2
nd
flame (pressure
switch or thermostat) re-activates the total fuel and air delivery rate.
If the burner operates only with the 1
st
flame, it will stop completely
when the pressure or the temperature reaches the tripping point set
on the control device (pressure switch or thermostat).
The burner starts up automatically again when the pressure or
temperature falls below the limit to which the pressure switch or
thermostat has been pre-set.