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

Assembly after dismantling
7. Position gaskets (in the pack supplied) onto both
top flanges and fit the connection lines on the
water side.
Connect flanges with nuts and bolts.
!
Please note
Tighten the screws on the flanged joint to
ensure the components are not being dam-
aged and are functioning correctly.

Connections on the heating water side

H
G
F
E
D
C
B
A
Fig. 9
Boiler return 1
A
for 187 and 248 kW: PN 6 DN 65
for 314 kW: PN 6 DN 80
for 408 to 635 kW: PN 6 DN 100
Drain: R 1
B
Boiler return 2
C
for 187 to 314 kW: PN 6 DN 50
for 408 to 635 kW: PN 6 DN 80
Female connection for pressure limiters: R
D
Safety connection (safety valve)
E
for 187 to 314 kW: R 1
for 408 to 635 kW: R 1
12
(cont.)
½
¼
½
Boiler water temperature sensor
F
Female connection for additional control equip-
G
ment: R
¾
Boiler flow
H
for 187 and 248 kW: PN 6 DN 65
for 314 kW: PN 6 DN 80
for 408 to 635 kW: PN 6 DN 100