Viessmann KOB PYROTEC, Technical Manual

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3.1 Specification for Pyrocontrol
Programmable logic control (PLC) for the PYROTEC boiler system
incl. the control of equipment for fuel charging according to the articles
listed separately. Modulating matching of the boiler output to heat con-
sumption is carried out. The control circuit of combustion optimisation with a Lambda probe
overlaps the output control circuit. With regard to fire protection and
personal safety, the highest possible quality criteria are fulfilled.
Rated output range kW 390 530 720 950 1250
Part no. 7423 692 7423 693 7423 694 7423 695 7423 696
Functions
■ Output control circuit with modulating output operation (25-100 %)
■ Air-controlled by means of variable speed ventilation fan subject to
flow temperature
■ Exact fuel supply via the supply screw conveyor from dosing con-
tainer with separating barrier
■ Level monitored top up of dosing container
■ Limitation and distribution of the fuel in the combustion chamber
■ Emissions optimised control circuit with fine tuning of the fuel/air
mixture using the Lambda probe
■ The pressure control unit ensures a constant underpressure in the
combustion chamber.
■ Limitation of the combustion chamber temperature with correspond-
ing variation of air ratio for protection of the fireproof lining
■ Keeping up the return temperature through the boiler ensures a long
boiler service life
■ Protection to avoid:
– Excessive temperature
– Burn-back
– Opening of the combustion chamber door
– Opening of a charging cover
– Pressure in the combustion chamber
■ Zero volt output (fault message)
Operation:
Operation is carried out via a 8” touch-screen module. All operating
data can be shown on the display. The set values of all important
parameters can be entered easily. Fault messages are displayed in
plain text and output in the sequence of occurrence. Programming module:
For operating the heating system.
The 8” touch-screen module integrated in the control panel door ena-
bles visualisation and graphical evaluation via the system.
0,0 °C 0,0 °C
Einstellungen Analyse
Archiv Kessel Ein Kessel Aus
Sperren
25,9 °C
21,0 %
Aus
30,0 °C 26,6 °C
26,4 °C
27,0 °C
26,2 °C
26,4 °C
27,0 °C
Übersicht
Status: Level 0
Zeit: Text:
05.10.07 10:45:01 Warnung Feuerrauntüre offen
KOB
PYROTEC
Control unit
PYROTEC
13
5822 511 GB
3