Connections On The Dhw Side - Viessmann VITOCELL 300-V VIB-A+ Installation And Service Instructions Manual

Connections on the heating water side
WW
4
2
1
KW
Fig. 14
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. For heating water flow temperatures in excess of
95 °C and cylinder capacity of 300 l: Remove the
pipe collars from the pipe outlets on the heating
water side.
Note
Pipe collars have l.h. threads.
2. Install the heat supply control unit.

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 and a check valve.
Connection of the DHW circulation pump:
■
– Connection to the boiler control unit if it is equip-
ped with a DHW circulation pump connection.
– Connection with a time switch if no DHW circula-
tion pump connection is available on the boiler
control unit.
Connection via time switch.
–
■ Always install cylinder banks with connected DHW
circulation.
(cont.)
3 5
Circulation pump
5
KW Cold water
WW DHW
3. Install the flow line with a rise and fit an air vent
valve at the highest point.
4. Only for heating water flow temperatures in excess
of 110 °C:
If the system does not already have one, also
install a type-tested high limit safety cut-out.
For this, use a temperature limiter and high limit
safety cut-out (TR/STB).
!
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.
Installation sequence
17