Connections On The Heating Water Side; Making The Safety Connection And Testing For Tightness - Viessmann Vitoplex 100 Installation Instructions For Contractors

Connections on the heating water side

Note
Install all pipe connections free of load and torque
stress.
D C
E
Fig. 10
Boiler return
A
780 and 950 kW: DN 100
1120 and 1350 kW: DN 125
1700 and 2000 kW: DN 150
Safety connection (safety valve)
B
780 and 950 kW: DN 50 PN 16
1120 to 2000 kW: DN 65 PN 16
Female connection for boiler water temperature
C
sensor, high limit safety cut-out and temperature
controller
Flue gas collector
The version of cleaning cover on the flue gas collector
depends on the output rating.

Making the safety connection and testing for tightness

Install the safety lines.
Permiss. operating pressure
Test pressure
Note
Equip the boiler with a safety valve that is correctly
sized and suitable for heating systems.
Install all pipe connections free of load and torque
stress.
B A
6 bar (0.6 MPa)
9 bar (0.9 MPa)
Boiler flow
D
780 and 950 kW: DN 100
1120 and 1350 kW: DN 125
1700 and 2000 kW: DN 150
Drain outlet R 1
E ¼
!
Please note
Unsuitable water quality can damage the boiler
body.
Only fill the boiler with water that complies with
the "Water quality requirements" (see service
instructions).
13