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Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Commissioning
Filling the Heating System
Water connections
Vitodens 100-W boilers can be used in any fully pumped
hot water heating system.
Minimum system pressure is 0.8 bar (12 psig).
Chemical corrosion protection products: Corrosion does
not typically occur in sealed heating systems which have
been correctly installed and are correctly operated.
Many manufacturers of plastic pipes recommend the
use of chemical additives. In this case, only those
commercially available corrosion protection products
approved for boilers with domestic hot water heating via
single-wall heat exchangers (instantaneous plate heat
exchangers or DHW tanks) must be used.
Total permissible hardness of the fill and top-up water for the heating system
Total heating output Specific heating volume
MBH
< 5 USG per 3412 BTU
≥
5 USG per 3412 BTU to
< 13 USG per 3412 BTU
≥
13 USG per 3412 BTU
≤
170
300 ppm
17.5 gpg
200 ppm
11.7 gpg
2 ppm
0.11 gpg
> 170 to
≤
682
200 ppm
11.7 gpg
150 ppm
8.8 gpg
2 ppm
0.11 gpg
> 682 to
≤
2050
150 ppm
8.8 gpg
2 ppm
0.11 gpg
2 ppm
0.11 gpg
> 2050
2 ppm
0.11 gpg
2 ppm
0.11 gpg
2 ppm
0.11 gpg
ppm - parts per million
gpg - grains per gallon
Underfloor heating systems
For underfloor heating systems Viessmann recommends
the use of plastic tubing with an oxygen diffusion barrier
in order to prevent the diffusion of oxygen through tubing.
If plastic tubing without an oxygen diffusion barrier
is used in underfloor heating systems, Viessmann
recommends that such systems be separated from the
boiler with a heat exchanger.
Water Conditions for DHW B1KE
Media: pH value 6.5 to 12, glycol max. 30%
DHW (max. hardness): Chloride up to 250 mg/L
Hardness up to 358 ppm
(= max. 0.278 kg/m
3
lime deposit)
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 B1HE 85, 120, 150, 199 and 30% for the B1KE
120 and 199. 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.
