Viessmann VITODENSd 100-W Technical Data Manual page 27

Vitodens 100-W, WB1B Technical Data
System Design Considerations
Oxygen diffusion barrier underfloor tubing
The boiler warranty does not cover leaks resulting from
corrosion caused by the use of underfloor plastic tubing
without an oxygen diffusion barrier. Such systems must
have the non-oxygen diffusion barrier tubing separated
from the boiler with a heat exchanger.
Viessmann recommends the use of underfloor plastic
tubing with an oxygen diffusion barrier.
Water quality
Treatment for boiler feed water should be considered in
areas of known problems, such as where a high mineral
content and hardness exist. In areas where freezing might
occur, an antifreeze may be added to the system water
to protect the system. 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
backflow preventer within the automatic water feed and
influence components such as diaphragm expansion tanks,
radiation, etc. Maximum antifreeze content is 50% for the
Vitodens 100-W boiler (when used with DHW CombiPLUS
max. content is 30%). Do not use antifreeze other than
specifically made for hot water heating systems.
The system may also contain components which might
be negatively affected by antifreeze.
Check total system frequently when filled with antifreeze.
Advise system operator/ultimate owner that system is filled
with a glycol mix.
The heating contractor must provide a MSDS (Material
Safety Data Sheet) for the antifreeze used to the system
operator/ultimate owner.
(continued)
Warranty
Our warranty does not cover damages resulting from
the following:
- installation or service by unqualified and unlicensed
personnel.
- attempting to perform any repair work on
the boiler other than that mentioned in the boiler
literature.
- tampering with or attempting to readjust
the factory settings of the combination gas valve
- leaks resulting from corrosion caused by
the use of underfloor plastic tubing without an
oxygen diffusion barrier.
For detailed warranty information, please read warranty
sheet supplied with product.
Design
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