baltur COMIST 180 Instructions For Use Manual page 51

ELECTRICAL CONNECTIONS
Electrical lines must be placed at an adequate distance from hot
parts. We advise you to carry out all connections by using flexible
electrical wire, with a section suitable for the available voltage and
absorbed power.
FURTHER DETAILS ON MIXED BURNER STARTING
We advise you to start the burner first with liquid fuel, since delivery
is, in that case, determined by the nozzle (or nozzles) used, while
you can change methane delivery as you want by acting on the
relative flow regulator.
SETTING OF LIGHT OIL STARTING
Be sure that the nozzles used are proportionate to boiler power.
When you choose nozzles (spray angle at 45°) take into account
that fuel delivery on first flame must not be considerably lower than
the lowest flow rate of the burner (see burner plate).
Be sure that the combustion mouth enters the furnace as required
by the boiler manufacturer.
Be sure that the return pipe to the tank has no occlusion, gate valves
are closed and so on. Any obstacle would break the sealing member
placed on the pump shaft or on the hose. Turn on the cut-off device/s
on the suction pipe. Exclude the connection or "bridge" to the second
flame thermostat. Turn on the air purging device installed on the
pump. Turn on the main switch (the switch on the burner must stay
at "O" = off) the pump motor relay by hand in order to check the
correct direction of rotation. If necessary, exchange the two wires in
the output main line of the relay for inverting the direction of rotation
in the motor. Connect again the pump motor relay by hand for starting
the pump and suck in light oil from the tank. When you see light oil
coming out from the air purging device, stop the motor and turn off
the air purging device. The burner is now ready for light oil running.
LIGHT OIL STARTING AND REGULATION
• Be sure that motors (fan and pump) are rotating in the right
direction.
• Be sure that combustion products can be blown off without any
problem (open flue damper) and the boiler is not without water.
• Adjust the combustion air regulator to the amount you
presumably need (see 8653/1) and open the air way between
head and disk by one third. Disconnect the second flame
Equipment and Safety time
relative in seconds
programmer
LFL 1.333
Cyclic relay
CONTROL BOX CHARACTERISTICS
Pre-ventilation
time and oil Pre-
circulation
3 31,5
0006080095_201207
thermostat and give current to the burner by turning on the main
switch and the burner switch (light oil position). The burner is
therefore connected and it carries out preventilation phase. If the
air pressure control device detects that pressure is higher than
the regulated value, the starting transformer will be turned on,
followed by the first flame light oil valve, then the burner will start.
• With the first flame burner running, adjust, if necessary,
combustion air delivery. When regulation is over, stop the burner
and start it again for being sure that starting is correct. For getting
a mild starting, remember that you normally need to regulate air
to the bare minimum. If starting takes place mildly, disconnect
the burner and connect the second flame thermostat terminals
directly (bridge).
• Set the combustion air regulator in the position you presumably
need for adding the second flame (see 8653/1).
• Now connect the burner again, it will begin to run with first and
second flames. Act on the second flame air-regulating cam for
adjusting air delivery according to specific conditions.
• The burner is equipped with a device which optimizes
combustion by decreasing or increasing the air flow between
disk and head. Normally, you need to decrease the air flow
between disk and head when the burner is running with limited
fuel delivery, this air way must be proportionally larger when the
burner is working with increased fuel delivery (0002922520). If
the combustion head is pushed forward (narrower way between
disk and head) you must avoid complete closure. While adjusting
the combustion head, you must center the head to the disk
perfectly. Remember that imperfect centering of the combustion
head to the disk may result in bad combustion and overheating of
the head with its subsequent rapid deterioration. Check centering
by looking through the inspection hole placed on the back part
of the burner, then, tighten firmly the two screws fastening the
combustion head in its position.
• The maximum rate of smoke allowed is n° 2 of Bacharach
scale with a carbon dioxide value (CO
from 10 to 13%.
Pre-starting
in seconds
6
13 / 36
) ranging
2
Post-starting Time between
in second 1st flame and 2nd
flame
in seconds
12
3