Viessmann Vitodens 200 Technical Manual page 78

2.5 Connections on the gas and the water side
Cold water installation of the separate DHW cylinder and primary cylinder of the Vitodens 333
Example: Wall mounted DHW cylinder (80 litres) with safety assembly to DIN 1988
2
A
A Hot water
B Safety valve
C Visible blow-off pipe outlet
D Cold water
E Drain
The safety valve must be installed.
Recommendation: Install the safety valve higher than the top edge of the cylinder. This protects the valve against contamination,
scaling and high temperatures. Also, the DHW cylinder does not then need to be drained when working on the safety valve.
*1
According to DIN 1988 2, a drinking water filter should be installed in systems with metal pipes. Viessmann also recommends the
installation of a drinking water filter when using plastic pipes as per DIN 1988 to prevent contamination entering the DHW system.
78
O
B
F G H
C
Safety assembly to DIN 1988
P
E
F Shut-off valve
G Flow regulating valve
(installation recommended)
H Pressure gauge installation
K Non-return valve
L Drinking water filter
KE F F E L
D
M Pressure reducer
N Non-return valve/pipe separator
O Standard delivery of the safety
*1
P Diaphragm expansion vessel, suitable
M F N D
DIN 1988 2 Issue Dec. 1988
assembly offered as an accessory
for drinking water
(available as accessories for the
Vitodens 333)
(see page 125)
VITODENS