baltur SPARKGAS 30 LX, Инструкция

Страница: 34 / 80

2 / 76
0006080799_200708
COMBUSTION CONTROL
For a correct air/gas ratio, the methane carbon dioxide (CO
2
) value must be at least 8% at the minimum burner
supply, up to an optimum value of 0% for maximum supply.
It is advisable not to exceed a 0% value so as to prevent operation with too limited air excess, which could cause
(atmospheric pressure variation, presence of dust in the air ducts) a sensible CO (carbon oxide) quantity.
To prevent dangerous situations, the carbon oxide (CO) percentage in the flue gas must always measured
with the special instrument to make sure that it does not exceed the maximum admissible value of 0.1%.
IGNITION AND GAS REGULATION (METHANE)
) Make sure that the combustion head penetrates into the combustion chamber by the quantity required
by the manufacturer.
Check that the device that turning off the air on the combustion head is in the proper
position for the required fuel supply (the air passage between disk and head must be sensibly reduced in
case of low fuel supply. In the contrary case, if the fuel supply is quite high, the air passage between disk and
head must be opened). See chapter “Combustion head regulation”.
2) If not already done when connecting the burner to the gas pipes, taking the necessary measures and open-
ing doors and windows, it is necessary to bleed the air contained in the pipes. Open the union on the pipes
close to the burner, and slightly open the gas stop cock(s). Wait until you smell the typical gas smell, and then
close the cock. Wait for the necessary time, according to the specific conditions, until the gas present in the
room is dispersed outside and then restore the connection of the burner to the gas piping.
) Check that there is water in the boiler and that the plant dampers are open.
4) Make sure that the combustion product discharge can occur freely (boiler and chimney dampers
open).
5) Check that the electrical line voltage corresponds to that required for the burner, and that the electrical con-
nections (motor and main line) are preset for the available voltage value. Check that all electrical connec-
tions implemented on the spot are properly executed as per our wiring diagram.
6) Apply a pressure gauge with suitable scale to the gas pressure take-off to measure the regulation value (if the
expected pressure rate allows it, it is preferable to use a water column instrument, do not use hand instru-
ments for low pressures).
7) Regulate the air for the ignition flame, for minimum flame and high flame, following the instructions for regulating
air damper control electrical motor shown in the following pages. In practice, set the low flame and high flame
air regulation cams to the suitable positions according to the desired thermal power for low and high flame.
8) By acting on the special screw for adjusting the gas and air pressure ratio, on the gas valve mod. MB-VEF....,
set the desired value (see the specific instructions for the gas valve MB-VEF.... in the following pages). In
practice, you must act on the adjusting screw of the ratio between the gas pressure (at the combustion head)
and the air pressure (at the combustion head) to set the reference index between the values of 0.4 and 0.8
so as to have a greater air supply than gas.
0) Now enable the control panel switch and set the modulation switches to MIN (minimum) and MAN (manual).
The control box thus receives voltage, and the programmer determines the enable of the burner as described
in chapter “description of the operation”.
Note : Pre-ventilation is carried out with open air and thus, during the same, the regulation servomotor is
enabled, and it runs a complete opening stroke up to the “maximum” set. Only when the regulation
servomotor returns to the “ignition” position, the control box continues its ignition program by enabling
the transformer and the ignition gas valves.
During the pre-ventilation step, make sure that the air pressure control switch changes position (from off posi-
tion without pressure detection it must switch to the off position with air pressure detection). If the air pressure
switch does not detect the sufficient pressure (it does not switch position), the ignition transformer and the
flame gas valves are not enabled, and thus the control box “locks”.
Note that some “locks” at the first stage are normal since in the valve ramp pipes there is still air that must be
discharged before having a stable flame. To “unlock”, press the “unlock” push button. At the first stage
there may occur further “locks” due to: