Vitodens 200-W
gas condensing
system boiler
with separate
DHW cylinder
Vitodens 222-W
with integral
DHW loading
cylinder
Vitodens 222-F
with integral
DHW loading
cylinder
Vitodens 242-F
with integral, du-
al mode DHW
loading cylinder
Solar DHW
heating can
be connec-
ted
Connection to dual mode DHW cylinder
+
–
–
–
Connection to integral DHW cylinder
–
–
–
+
+ = recommended
0 = recommended under certain conditions
– = not recommended
Separate DHW cylinders
For greater DHW convenience, separate DHW cylinders are also
available in white in the following versions:
■ Below the boiler (120 or 150 l)
■ Adjacent to the boiler (160, 200, 300 or 400 l)
Further DHW cylinders with up to 1000 l capacity are available in
Vitosilver and may also be used in accordance with the available
heating output.
The Vitodens 200-W is equipped at factory with a separate DHW cyl-
inder for DHW heating. A diverter valve is integrated for this pur-
pose.
For the connection of a separate DHW cylinder, a DHW cylinder con-
nection set (incl. cylinder temperature sensor) must always be
ordered separately.
For DHW cylinder specifications, see chapter "DHW cylinders".
Sizing the DHW cylinder
Determine the DHW cylinder size in accordance with the specific
DHW demand.
Various combinations of taps/draw-off points can be applied.
If identical taps/draw-off points are combined, only take into account
the individual draw-off point, not the combination.
The following summary enables an
approximate
sizing of the DHW
cylinder:
Small households (1 to 2 occupants)
Average households (3 to 4 occupants)
Cylinder capacity in litres
Bath 1600
to DIN 4471
Bath 1700
to
DIN 4471
Small bath
and sit
bath
Large bath
(1800 ×
750 mm)
Shower
cubicle
with mixer
tap and
standard
shower
head
Shower
cubicle
with 1
shower
head and 2
side noz-
zles
Washbasin Bidet
Draw-off rate in W/h
5820
6510
4890
8720
1630
4070
700
810
Draw-off volume per use or
useful capacity in l
140
160
120
200
40
100
17
20
Bath 1600
to DIN 4471
120
120
120
120
120
120
120
150/160
120
120
Bath 1700
to DIN 4471
120
120
120
120
120
120
120
120
120
120
Small bath and sit bath
120
120
120
120
120
120
120
120
120
120
Large bath
(1800 × 750 mm)
120
120
120
120
120
200
150/160
200
150/160
150/160
Shower cubicle with mixer
tap and standard shower
head
120
120
120
120
120
120
120
120
120
120
120
150/160
120
120
120
120
Shower cubicle with 1
shower head and 2 side
nozzles
120
120
120
120
120
120
120
150/160
150/160
200
120
120
120
120
Washbasin
120
120
120
120
120
120
120
120
120
120
120
150/160
120
120
120
120
Bidet
120
120
120
120
120
120
120
120
120
120
120
150/160
120
120
120
120
Example:
■ Average household with 3 occupants
■ Use of a bath 1600 with 140 l drawn
■ Simultaneous operation of a shower with mixer tap and standard
head with 40 l drawn
The table shows that in accordance with DIN 4708, the correct DHW
cylinder would have a capacity of 120 l.
Design information
(cont.)
126
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VITODENS
8
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