baltur TBML 350 ME, Инструкция по установке, использованию и обслуживанию, Страница: 76 / 92

ENGLISH
30 / 44
0006160077_201802
GAS PRESSURE SWITCH OPERATION DESCRIPTION
The gas pressure switches (minimum and maximum) prevent
the burner from operating when gas pressure is not between the
expected range.
The minimum value pressure switch makes use of the NO (normally
open) contact which is closed when the pressure switch detects a
pressure higher than its own setting.
The maximum pressure switch makes use of the NC (normally closed)
contact which is closed when the pressure switch detects a pressure
lower than its own setting.
Adjustment of minimum and maximum pressure values on the
pressure switches must be performed when testing the burner, on the
basis of the pressure measured in each case.
The pressure switches are connected so that, the intervention
understood as opening of the circuit of the maximum value pressure
immediately determines the burner lock
The minimum setting pressure switch intervenes and stops the
burner. The burner stays in stand-by until the pressure is restored
and lies within the values required for operation.
After that, the burner re-starts in an autonomous way following the
ignition sequence.
Adjustment before switching on the burner:
regulate the pressure switch for minimum pressure at the minimum
value of the scale, regulate the pressure switch for the maximum
value at the maximum value of the scale.
REGULATION AFTER THE BURNER CALIBRATION:
With the burner running at maximum output, regulate the pressure
switch for minimum pressure by increasing the setting value until the
burner shuts down, read the value on the regulation ring and set it to
a value diminished by 5 mbar.
With the burner running at maximum power, regulate the pressure
switch for maximum pressure, diminishing the regulation value until
the NC (normally closed) contact opens. Read the value on the
regulation ferrule and set it to a value increased by 5 mbar.
IMPORTANT
In case only one pressure switch is installed on the gas train, it
must be a pressure switch for minimum pressure.
DIAGRAM FOR REGULATION OF COMBUSTION HEAD AND ELECTRODE DISK DISTANCE