Viessmann Vitoflex 300-RF Technical Data Manual page 34

Commissioning
Commissioning
Fuel for the commissioning
For the commissioning, sufficient dry fuel (max. W 20%)
should be stored for approx. 10-24 full operating hours:
Vitoflex 300-RF 150
Vitoflex 300-RF 220
Vitoflex 300-RF 300
Vitoflex 300-RF 400
Vitoflex 300-RF 500
Since the boiler plant will be cold, and residual moisture
will be drawn from the refractory concrete during the
initial operation, the material to be burned for the initial
operation has to be at least air dry. For the first three hours,
the heating-up process should be carried out at low output.
To ensure that the silo extraction system is functioning
properly, only place a minimal amount of fuel in the silo
in case there is a problem. This enables the extraction
system to be cleaned out quickly and the problem to be
identified and corrected.
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approx. 2640 lb. (1198 Kg)
approx. 3300 lb. (1358 Kg)
approx. 4400 lb. (1996 Kg)
approx. 5500 lb. (2495 Kg)
approx. 6600 lb. (2994 Kg)
Water quality
Treatment for boiler feed water should be considered
in areas with known problems, such as where a high
mineral content and hardness exist. In areas where
freezing might occur, it recommended that an antifreeze
be added to the system water for protection against
freezing. Please adhere to the specifications given by the
antifreeze manufacturer. Do not use automotive silicate-
based antifreeze. Please observe that an antifreeze/water
mixture may require a back flow preventer within the
automatic water feed and influence components such
as diaphragm expansion tanks, radiation, etc. A 40%
antifreeze content will provide freeze-up protection to
-10°F (-23°C). Do not exceed 50% antifreeze mix ratio
and do not use antifreeze other than specifically made for
hot water heating systems.
Total output (MBH) Total Hardness (ppm as ca CO
> 1 Total 680 200
> 680 to 2050
150
> 2050
2
The pH value of the heating water should be between 8.2
and 9.5
Oxygen diffusion barrier under floor tubing
The boiler warranty does not cover pressure vessel failure
resulting from corrosion caused by the use of underfloor
plastic tubing without an oxygen diffusion barrier. Such
systems without oxygen diffusion barrier must have the
tubing separated from the boiler with a heat exchanger.
Viessmann always recommends the use of underfloor
plastic tubing with an oxygen diffusion barrier.
Vitoflex 300-RF Technical Data
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