baltur TBG 1100 ME Manual De Instrucciones página 16

GAS PRESSURE SWITCH FUNCTIONAL
DESCRIPTION
The gas pressure switches (minimum and maximum) prevent
the burner from operating when gas pressure is not between the
expected range. The specific function of the pressure switches
clearly reveals that the pressure switch for controlling minimum
pressure uses the NO (normally open) contact which closes 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 (normally closed) contact that 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 (flame on), will shut down the burner immediately.
Regulation prior to burner ignition: 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.
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 ferrule 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 increased by 5 mbar.
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
1) Ionising electrode
2) Ignition electrode
3) Flame disk
4) Mixer
5) Gas delivery pipe
TBG 1100 ME
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