Operating instructions

30
5603 882 - 01
Pyrotec Installation & Operating
Piping and Installation of Safety Devices (continued)
Mixing valve Viessmann ASME recommended tank sizes (U-stamped)
Boiler model KPT- Nominal
pipe size
Valve
390 3 in. 3-way mixing valve
530 4 in. 3-way mixing valve
720 5 in. 3-way mixing valve
950 5 in. 3-way mixing valve
1250 6 in. 3-way mixing valve
Boiler model KPT- Tank size
L USG
390 3785 1000
530 5678 1500
720 6624 1750
950 9464 2500
1250 12492 3300
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 combustion chamber door
A level monitor must be installed to prevent overfilling
of the combustion chamber door. 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 combustion chamber
door.
- 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.
- 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.
The heating contractor must perform the installation of
the fire extinguishing system as specified in section Fire
Extinguishing Systems.
IMPORTANT
Boiler pump
Boiler model KPT- Pump Frequency Voltage and phase
390 UPS 50-80/4 F 60 Hz 3 x 208-230 V
530 UPS 50-80/4 F 60 Hz 3 x 208-230 V
720 UPS 80-160 F 60 Hz 3 x 208-230 V
950 UPS 80-160 F 60 Hz 3 x 208-230 V
1250 TP 100-80/4 60 Hz 3 x 208-230 / 460 V
Design Recommendation (continued):
Mechanical