Connections On The Water Side; Connections On The Dhw Side - Viessmann VITODENS 242-F Technical Manual

Design information

6.3 Connections on the water side

Connections on the DHW side

Cold water installation
For the location of connections, see the relevant connection set
A Domestic hot water
B DHW circulation line
C DHW circulation pump
6
D Spring-loaded check valve
E Visible blow-off line outlet
F Safety valve
G Shut-off valve
H Flow regulating valve
(Installation and adjustment of the maximum water flow rate in
accordance with the peak draw-off rate of the DHW cylinder (see
"Specification") is recommended)
Note
The DHW circulation pump C and check valve D are part of the
DHW circulation pump connection set (accessory) and are fitted into
the boiler.
Safety valve
The safety valve must be installed.
Drinking water filter
According to DIN 1988-2, a drinking water filter should be installed in
systems with metal pipework. Viessmann also recommends the instal-
lation of a drinking water filter when using plastic pipes, as per DIN
1988, to prevent contaminants entering the DHW system.
VIESMANN
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(cont.)
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
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.
VITODENS