baltur TBG 1100 MC, Manual User Instructions

Page: 22 / 144

press aria001
20 / 28
0006160025_201305
ENGLISH
AIR PRESSURE SWITCH OPERATION
DESCRIPTION
The air pressure switch is used to lock the equipment if air pressure
is not at the expected value. The pressure switch must be set to
close the normally open contact, when the air pressure in the burner
reaches a suffi cient value.
To verify that the air pressure switch is operating correctly, con while
the burner is ignited at its minimum setting, while the burner is ignited
at its minimum setting. Reset the burner by pushing the appropriate
button and readjust the pressure switch to an adequate value to
detect the existent air pressure during the pre-ventilation phase.
GAS PRESSURE SWITCH OPERATION
DESCRIPTION
The pressure switches for checking gas pressure (minimum
and maximum) prevent the burner from operating when gas pres-
sure is not between the expected ranges. The specifi c function of
the pressure switches clearly reveals that the pressure switch for
controlling minimum pressure uses the NO contact (normally open)
which is closed when the pressure switch detects a pressure value
above the value it is set to, while the pressure switch for controlling
maximum pressure uses the NC contact (normally closed) which is
closed when the pressure switch detects a pressure lower than the
value it is set to. The minimum and maximum gas pressure switches
must be set when testing the burner, on the basis of the pressure
measured in each case. The pressure switches are connected in
a way in which tripping (opening the circuit) of one of the pressure
switches when burner is working (fl ame on), will shut down the
burner immediately.
Adjustment before switching on the burner:
set the minimum pressure switch to the lowest setting on the scale,
set the maximum pressure switch to the highest setting on the scale.
Adjustment after burner calibration:
With the burner at the maximum delivery, regulate the pressure
switch for minimum pressure by increasing the regulation value
until the burner shuts down, read the value on the regulation fer-
rule and set it to a value diminished by 5 mbar. With the burner off,
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 in-
creased by 5 mbar.
in case only one pressure switch is installed on the gas train
it must be a pressure switch for minimum pressure.