baltur BT 40 DSG Instruction page 39

4) The small motor of the cyclic relay which will start to rotate causing the connection of the burner component
devices according to the preset program. The burner will start operation as described in the Chapter "Description
of Operation".
5) When the burner operates with the 1st flame, adjust the amount of air necessary,for an efficient combustion by
following the previous description under n. 2.It is better if the amount of air for the 1st flame is slightly reduced in
order to ensure a perfect ignition also in the most critical conditions.
6) After adjusting the amount of air for the 1st flame, stop the burner by cutting off the current from isolating switch,
connect the terminals on the terminal board of the 2nd flame thermostat among them and settle the 1st and 2nd
stage switch in 2nd stage position (where provided).
7) Adjust the screw which restricts the stroke of the hydraulic piston controlling the air shutter of the 2nd flame;
unscrew it that amount which is deemed to be necessary to burning fuel.
Remarks: Before turning the adjusting screw, loosen the lock nut and after completing the adjustment, tighten it up again.
8) Now connect the burner again; it will
start and automatically switch to the 2nd
flame according to the present program.
9) With the burner operating with the 2nd
flame, adjust the amount of air
necessary to ensure an efficient
combustion with the screw mentioned
under item 7. Combustion test should
be made using appropriate instruments.
Make the regulation so as to obtain a
certain amount of carbon dioxide (CO
in the smoke, varying from min. 10% to
max. 13% with a smoke number not
exceeding 2 (Bacharach scale).
CHECKS
After starting up the burner, check the safety devices (photoresistance, block, thermostats).
1) The photocell is the flame control device and so it should trip if the flame extinguishes during operation (this
check should be made after at least 1 minute from lighting up).
2) The burner should be capable of blocking itself and remain so when a normal flame does not come on during
start-up cycle and within the preset on control box. The "lock-out" causes the motor and the burner to stop
immediately and corresponding "lock-out" warning lamp lights up.To check the function photoresistant-cell and
lock-out system proceed as follows:
a) Start up the burner.
b) After at least one minute, remove the photo-cell from its seat and pull it out and simulate flame failure by
covering the photo-cell (use a rag to close the window in the photocell support).The burner flame should
go to lock-out. If the control box model LAL 1.25 is used, a burner lock-out will result.
c) Keep the photo-cell in the dark and the burner will start again, but the photo-cell does see the light and the
burner goes to lock-out within the time preset by control box. The control box can be reset only manually
by pressing the appropriate push-button.The lock-out efficiency test should be made at least twice.
3) To check the thermostat efficiency, run the burner until the water in the boiler reaches a temperature of at least
50 °c and then turn the thermostat control knob to reduce the temperature until an opening click is heard and
simultaneous stopping of the burner. The thermostat should trip within a maximum tolerance of 5 to 10 °C in
respect to the control thermometer (boiler thermometer); if not, change the setting on the thermostat scale to
match that of the thermometer.
38
AIR SETTING SCHEMA
)
2
N° 8614
REV. 07/01/97
A Plug
B Air adjusting screw for 1st flame
C Lock nut
D Air adjusting screw for 2nd flame
E Lock nut
F Air sutter control
G Air inlet