Connections On The Dhw Side - Viessmann Vitocell 100-B Installation Instructions For Contractors

Connecting the heating water side and solar side
Solar collector
5
Boiler
6
Heating circuit
7
Cylinder temperature sensor (on the heating
8
water side)
C
A
B
Fig. 17
1. Install the heat supply control unit.
2. Check connections
retighten if required.
Tightening torque: 45 to 50 Nm
3. When using copper pipes:
Insert support sleeves
Tightening torque for both union nuts: 30 Nm

Connections on the DHW side

For the DHW connection, 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.
A and B for leaks and
supplied.
C
(cont.)
Fill valve
9
Temperature sensor, high limit safety cut-out
qP
(STB)
4. Install the flow line with a rise and fit an air vent
valve at the highest point.
5. Only for heating water flow temperatures in excess
of 110 °C:
Install a type-tested high limit safety cut-out, if one
has not yet been installed in the system (see
pages 16 and 19). For this, use a temperature
limiter and a high limit safety cut-out.
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, provided this
is equipped with a DHW circulation pump connec-
tion.
Connection with a time switch, if there is no DHW
–
circulation pump connection on the boiler control
unit.
17