Connections On The Heating Water Side - Viessmann Vitocrossal 300 Installation Instructions For Contractors

Connections on the heating water side

Note
The boiler is only suitable for fully pumped hot water
heating systems.
A B
G
H
Fig. 10
Boiler return 2: PN 6 DN 100
A
Boiler return 1
B
787 and 978 kW:
1100 and 1400 kW: PN 6 DN 125
Safety connection (safety valve): R 2
C
Female connection for pressure limiter: R
D
1. Thoroughly flush the heating system.
16
PN 6 DN 100
½
C
Boiler flow
E
787 and 978 kW:
1100 and 1400 kW: PN 6 DN 125
Female connection for control equipment: R
F
Drain outlet: R 1
G
Condensate drain: R
H
D E F
PN 6 DN 100
¼
½
½