Viessmann KOB PYROTEC, Technical Manual

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2.1 Product description
A 3-pass boiler (3 bar or 6 bar)
B
External grate with primary air 2
C Safety heat exchanger
D Secondary air
E Ignition fan
F Supply screw conveyor with separating barrier
G Combustion retort with internal grate and primary air 1
H Removal of ash
K Combustion chamber door
L Moving infeed grate
M
Pneumatic heat exchanger cleaning
The PYROTEC grate combustion has been specially developed for the
automatic combustion of dry and moist wood fuels (waste wood, wood
pellets or woodchips from forest thinnings up to max. W50). It com-
bines the benefits of underfeed combustion with the advantages of
grate combustion to optimum effect. The PYROTEC grate combustion
is particularly impressive thanks to its maximum efficiency and perfect
combustion in all load stages. The horizontal heat exchanger with
pneumatic cleaning is ideal for the use of fuels with a high fine per-
centage. The ash is removed automatically from the combustion base and
transported into a standard container. Efficiency of over 90 % enables
maximum seasonal efficiency in modulating operating mode. The use
of a PYROTEC grate combustion as a base load boiler is practical in
terms of a building heat load of 300 kW. Combination with a solar
thermal system is also easily possible. The PYROTEC grate combus-
tion is tested and permissible to EN 303-5. It is produced in accordance
with the Machinery Directive and has a CE designation. It is also sub-
ject to ongoing monitoring by the TÜV.
Benefits at a glance
■ High efficiency thanks to proven combustion technology, 3-pass
heat exchanger, modulating output control and regulated primary
and secondary air supply
■ Easy service thanks to fully automatic ash removal and optional
pneumatic cleaning system
■ Highly developed safety devices ensure a safe and reliable opera-
tion
■ Optimum system output is the result of manufacture and delivery of
all system components from a single source
■ Automatic ignition device prevents having to maintain the incandes-
cent bed and saves fuel (option – only for fuels with water content
below 40 %)
■ Individual planning of your system by our team of experts
■ Excellent output control from 30 to 100 %
Delivered condition
Preassembled steel boiler for wood pellets and woodchips according
to DIN
plus and ÖNORM M7135.
With integral return temperature raising facility, combustion chamber
door, ash doors, ash boxes, cleaning device.
1 supply screw conveyor with separating barrier, incl. extinguishing
valve with dirt trap
1 Pyrocontrol programming unit
1 flue gas fan
1 extinguishing water container with holder
1 automatic ignition system
1 secondary air device (draught stabiliser); for the installation in the
flue pipe
Pyrocontrol
■ Programming unit
■ Update-compatible software
■ Data line 10 m
■ Control panel
■ Infrared light barrier for level monitoring, separating barrier, supply
screw conveyor
■ Safety limit switch on inspection cover of supply screw conveyor
■ Contact sensor PT-100 at the supply screw conveyor
■ Infrared light barriers for level monitoring of the fuel in the combus-
tion chamber
■ Zirconium dioxide probe with measured value transducer
■ Flue gas temperature sensor PT-100
■ Return temperature sensor KTY
■ Boiler water temperature sensor KTY
■ High limit safety cut-out
■ Underpressure sensor
■ Sensor KTY with sensor well
■ Overpressure limiter
■ Light barrier ash removal
■ Limit switch, combustion chamber door
PYROTEC
PYROTEC
7
5822 511 GB
2