Connections On The Heating Water Side; Making The Safety Connections - Viessmann Vitocrossal 200 CM2 Series Installation Instructions Manual

Connections on the heating water side

Note
The Vitocrossal is only suitable for fully pumped hot
water heating systems.
Never install 4-way mixers, overflow valves or other
flow/return bypass devices.
Never connect heat consumers to the safety connec-
tion.
Install all pipe connections free of load and torque
stress.
A
G F
Fig. 26
Boiler return
A
400 to 620 kW: PN 6 DN 100
Safety connection (safety valve and air vent valve)
B
G 1
½
Female connection for control equipment R
C
minimum pressure switch)
1. Thoroughly flush the heating system.

Making the safety connections

1. Make the safety connection.
B C D E
½
Boiler water temperature sensor
D
Boiler flow
E
400 to 620 kW: PN 6 DN 100
Drain and expansion vessel connection R 1
F
(e.g. Condensate drain R
G
2. Connect the heating circuits.
2. Check the connections on the heating water side
for leaks.
Permiss. operating pressure: 6 bar (0.6 MPa)
Test pressure:
½
7.8 bar (0.78 MPa)
29