Connections On The Dhw Side - Viessmann VITOCELL 300-W Installation Instructions And Setup Manual

Connections on the heating water side
WW
4
2
1
KW
Fig. 13
Heating water return
1
Heating water flow
2
Spring-loaded check valve
3
Cylinder temperature sensor or temperature con-
4
troller and high limit safety cut-out (if required)
1. Install the heat supply control unit.
2. Install the flow line with a rise and fit an air vent
valve at the highest point.
3. Only for heating water flow temperatures in excess
of 110 °C:
Install an additional type-tested high limit safety
cut-out if the system does not already have one.
For this, use a TR/HLSC combination device (tem-
perature limiter and high limit safety cut-out).

Connections on the DHW side

For connections on the DHW side, observe
■
DIN 1988 and DIN 4753.
: SVGW regulations
c
■ Connect all pipework with detachable fittings.
■ Seal any connections that are not required with red
brass caps.
Equip the DHW circulation pipe with a DHW circula-
■
tion pump, check valve and time switch.
!
Please note
The internal indirect coil is installed with gas-
kets.
Temperatures > 150 °C at the connections will
■
damage the gaskets.
Maintain a safe distance when soldering and
welding.
■ Realigning the connector will damage the gas-
kets.
16
5
3
(cont.)
Circulation pump
5
KW Cold water
WW DHW
Note
For connections, see page 6.
Permissible temperature
Permissible operating
pressure
Test pressure
95 °C
10 bar (1 MPa)
16 bar (1.6 MPa)