Separate Dhw Cylinders; Sizing Cylinders - Viessmann VITODENS 200-W Technical Manual

Design information
Selection table
DHW demand, con- DHW demand for one apartment
venience
DHW demand for a detached house
DHW demand for a centralised system in an apart-
ment building
DHW demand for a decentralised system in an apart-
ment building
Utilisation of the var- One draw-off point
ious connected
Several draw-off points, no simultaneous utilisation
draw-off points
Several draw-off points, simultaneous utilisation
Distance between Up to 7 m (without DHW circulation line)
draw-off point and With DHW circulation line
boiler
Modernisation Existing DHW cylinder
Replacement of an existing combi boiler
Space requirement Low space requirement (installation in a recess)
Availability of sufficient space (installation room)
Solar DHW heating Connection to a dual mode DHW cylinder
can be connected
Connection to the integral DHW cylinder
+ = recommended
0 = recommended under certain conditions
– = not recommended

Separate DHW cylinders

For even higher DHW convenience, separate DHW cylinders are also
available in white in the following versions:
■ Below (120 or 150 litres).
■ Adjacent (160, 200, 300 or 400 litres).
Further DHW cylinders with up to 1000 litre capacity are offered in
Vitosilver and may also be used in accordance with the available out-
put.

Sizing cylinders

Determine the DHW cylinder size in accordance with the specific DHW
demand.
Various consumer combinations may apply.
If identical consumers are combined with each other, only the individ-
6
ual consumer will be considered and not the combination.
The following summary enables the approximate sizing of the DHW
cylinder:
Cylinder capacity in litres
Draw-off rate in Wh
Draw-off volume per use or
available capacity in l
Bath 1600
to DIN 4471
Bath 1700
to DIN 4471
Small and stepped bath
Large bath
(1800 × 750 mm)
VIESMANN
68
(cont.)
Bath 1600 Bath 1700 Small and
to DIN 4471 to stepped
DIN 4471 bath
5820 6510
140 160
120
120
120
120
Vitodens 200-W The Vitodens 200-
gas combi boiler W and Vitodens
with instantane- 300-W gas boiler
ous water heater with separate
DHW cylinder
+ +
0 +
– +
+ +
+ 0
+ +
– +
+ +
– +
– +
+ –
+ 0
+ +
– +
– –
The Vitodens 200-W and 300-W as boilers are intended (as ex factory
version) for DHW heating with a separate DHW cylinder. For this pur-
pose, the Vitodens 200-W and 300-W are equipped with an integral
diverter valve.
To connect a DHW cylinder, always order the connection set for the
respective DHW cylinder.
For specification of DHW cylinders, see chapter "DHW cylinder".
Small households (1 to 2 occupants)
Average households (3 to 4 occupants)
Note
Instead of a Vitodens 200-W or 300-W with 120 litre DHW cylinder, a
Vitodens 222-W can also be used.
Large bath Shower
(1800 × cubicle
750 mm) with mixer
tap and
standard
shower
head
4890 8720 1630
120 200 40
120
120
120
120
120 120
120 120
120 120
200 150/160
Vitodens 222-W
with integral DHW
primary store
+
+
–
0
0
+
+
+
–
–
0
0
+
–
–
Shower Washbasin Bidet
cubicle
with 1
shower
head and 2
side noz-
zles
4070 700
100 17
120 120
150/160 120
120 120
120 120
120 120
120 120
120 120
200 150/160 150/160
VITODENS
810
20
120
120
120
120
120
120
120