Fire Protection - Viessmann KOB Pyrotec KPT Series Technical Data Manual

Mechanical
Piping and Installation of Safety Devices
Design Recommendation (continued):
Boiler Pump
Boiler model KPT-
390
530
720
950
1250
Mixing valve
Boiler model KPT-
390
530
720
950
1250

Fire Protection

Follow local regulations for wood-fired heating systems.
Power failure provision
The customer must ensure that there is a supply of water
independent of the electrical supply. This design ensures
that in case of a power failure, the boiler will be reliably
cooled by the thermal run-off safety valve.
Protection against back-burn for the boiler plant
The following safeguards are part of the scope of
delivery for the PYROTEC Grate Firing System:
- Preventing overfilling of the fire box
A level monitor must be installed to prevent overfilling
of the fire box. The PYROTEC Grate Firing System
has a light barrier to monitor the embers.
- Preventing back-burn
With a temperature sensor directly on the in-feed auger,
any danger of back-burn initiation will be detected and
quickly counteracted at an early stage by increasing the
fuel conveyance speed into the fire box.
- Back flash safeguard
The PYROTEC Grate Firing System is operated with
continuous negative pressure and is equipped with
a back flash prevention device. This device prevents
back flashes caused by flying embers or combustible
gases that may ignite the fuel system.
20
Pump
UPS 50-80/4 F
UPS 50-80/4 F
UPS 80-160 F
UPS 80-160 F
TP 100-80/4
Nominal Valve
pipe size
3 in. 3-way mixing valve
4 in. 3-way mixing valve
5 in. 3-way mixing valve
5 in. 3-way mixing valve
6 in. 3-way mixing valve
(continued)
Frequency
60 Hz
60 Hz
60 Hz
60 Hz
60 Hz
Viessmann ASME recommended tank sizes (U-stamped)
Boiler model KPT-
390
530
720
950
1250
- Automatic in-feed auger extinguishing system
The supplied fire extinguishing system is necessary on
the in-feed auger. This system should reliably prevent
back- burn in case of a malfunction (such as a power
failure). For safety reasons and to prevent damage by
flooding, connecting the extinguishing system directly
to the water network is not advisable.
This extinguishing system must be equipped with a
6.6 USG (25 L) extinguishing water tank with a float-
type switch and an adjustable Danfoss extinguisher
valve. The tank for the extinguishing system must be
equipped with a level monitoring system.
If there is a shortage of water, the PYROTEC Grate
Firing System will switch off automatically.
In case of excess temperature, the in-feed auger will
be flooded reliably but in a limited fashion.
IMPORTANT
The heating contractor must perform the installation of
the fire extinguishing system as specified in section Fire
Extinguishing Systems.
Pyrotec Technical Data
Voltage and phase
3 x 208-230 V
3 x 208-230 V
3 x 208-230 V
3 x 208-230 V
3 x 208-230 / 460 V
Tank size
L USG
3785 1000
5678 1500
6624 1750
9464 2500
12492 3300