Combustion system
21
BURNER MODULATION STRATEGY
The burner is of the modulating type with PID (Proportional - Integral - Derivative) control.
The burner starts when the measured steam pressure is under the setpoint value shown in the operator panel of the control
panel, less the ignition differential, while it stops when the measured steam pressure reaches the setpoint value plus the turning
off differential.
The modulation occurs within the "modulation range", which is the sum of the "low modulation range" and the "high modulation
range".
The PID system is optimised to keep the pressure close to the “setpoint” value.
Above the "high modulation range" the burner will be immediately set to the minimum.
Under the "low modulation range" the burner will be immediately set to the maximum.
The sampling frequency is increased close to the upper and lower limits of the "modulation range" and converts the calculated
power value into a 4-20 mA analogue signal.
SETPOINT
BURNER
THERMAL
POWER
ON
OFF
HMR
High modulation range
LMR
Low modulation range
DA
Ignition differential
DS
Turning off differential
PID
Proportional Integrative Derivative Modulation
m
IMPORTANT
All the above-mentioned parameters are set from the control panel.
COMPLIANCE
The Combustion System complies with the following European Directives and Standards:
–
Directive 2009/142/EC (GAS)
–
Directive 2014/68/EU (PED)
–
Electromagnetic Compatibility Directive 2014/30/EU
–
Low Voltage Directive 2014/35/EU
–
EN 676 - EN 746-2 - EN 50156-1 standards
Содержание ECOVAPOR Series
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