5.2 Connections on the water side
Cold water installation of the DHW cylinder
Example:
Vitoladens 333-F with integral DHW cylinder and safety assembly to
EN 806
A
DHW
B
DHW circulation line
C
DHW circulation pump
D
Spring-loaded check valve
E
Visible blow-off line outlet
F
Safety valve
G
Shut-off valve
H
Flow regulating valve (installation recommended)
K
Pressure gauge connector
L
Non-return valve
M
Drain
N
Cold water
O
Drinking water filter
P
Pressure reducer
R
Non-return valve/pipe separator
S
Diaphragm expansion vessel, suitable for drinking water
Note
With the Vitoladens 333-F, DHW circulation pump
C
and check valve
D
are included in the DHW circulation pump connection set (acces-
sory) and fitted in the boiler.
Safety valve
The safety valve
must
be installed.
We recommend you install the safety valve higher than the top edge
of the cylinder. This protects the valve against contamination, scaling
and high temperatures. The DHW cylinder does not then need to be
drained when working on the safety valve.
Drinking water filter
According to EN 806, a drinking water filter should be installed in sys-
tems with metal pipework. Viessmann and the EN 806 also recom-
mend the installation of a drinking water filter when using plastic pipes,
to prevent contaminants entering the DHW system.
Design information
(cont.)
VITOLADENS 300-W
/
VITOLADENS 333-F
VIESMANN
51
5822 425 GB
5
