baltur TBML 350 ME, User Instruction Manual

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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 (nor-
mally open) contact which is closed when the pressure switch de-
tects 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 un-
derstood as opening of the circuit of the maximum value pressure
immediately determines the burner lock
The minimum value pressure switch stops the burner that remains
on standby until the pressure is restored 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 sca-
le.Regulation after the burner regulation:
With the burner running at maximum power, regulate the pressure
switch for minimum pressure by increasing the regulation value
until the burner shuts down, read the value on the regulation ferru-
le and set it to a value diminished by 5 mbar.
With the burner running at maximum power, regulate the pressu-
re 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 ILLUSTRATING REGULATION OF COMBUSTION HEAD AND DISTANCE OF ELECTRODE DISK
ENGLISH
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