Separate Dhw Cylinders - Viessmann VITODENS 222-F Series Technical Manual

Design information
8
Solar DHW Connection to dual mode DHW cylinder
heating can
Connection to integral DHW cylinder
be connec-
ted
+ = 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.
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.
Cylinder capacity in litres
Draw-off rate in W/h
Draw-off volume per use or
useful capacity in l
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
nozzles
Washbasin
Bidet
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
VIESMANN
126
(cont.)
Bath 1600 Bath 1700 Small bath
to DIN 4471 to and sit
DIN 4471 bath
5820 6510
140 160
120
120
120
120
120 120
120 120
120 120
150/160
120 120
120 120
120 120
120 120
Vitodens 200-W Vitodens 222-W
gas condensing with integral
system boiler DHW loading
with separate cylinder
DHW cylinder
+ –
– –
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".
The following summary enables an approximate sizing of the DHW
cylinder:
Small households (1 to 2 occupants)
Average households (3 to 4 occupants)
Large bath Shower
(1800 × cubicle
750 mm) with mixer
tap and
standard
shower
head
4890 8720 1630
120 200
120
120
120
200 150/160
120 120
120 150/160
120
150/160 200
120 120
120 150/160
120 120
120 150/160
The table shows that in accordance with DIN 4708, the correct DHW
cylinder would have a capacity of 120 l.
Vitodens 222-F Vitodens 242-F
with integral with integral, du-
DHW loading al mode DHW
cylinder loading cylinder
– –
– +
Shower Washbasin Bidet
cubicle
with 1
shower
head and 2
side noz-
zles
4070 700
40 100 17
120 120 120
120 150/160 120
120 120 120
120 120 120
120 120 120
120 120 120
120 120 120
200 150/160
120 120 120
120 120 120
120 120 120
120 120 120
120 120 120
120 120 120
120 120 120
120 120 120
810
20
120
120
120
120
120
120
120
150/160
120
120
120
120
120
120
120
120
VITODENS