24
KOA
E
KR
SA/KR2
KV
A
B
Fig. 19
E
Drain and expansion vessel connection R 1
KOA Condensate drain with trap R
½
KR
Boiler return
KR2 Boiler return 2 (accessories, subject to order)
KV
Boiler flow
SA
Safety connection G
½
and R 1
¼
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.
Install all pipe connections free of load and torque
stress.
Boiler flow and return connections
Rated heating
output
Connection PN 6
KR/KV
KR2
≤
142 kW
DN 50
DN 50
≥
186 kW
DN 65
DN 50
1.
Fit with a gasket, subject to order (accessories):
■
Safety connection
A
■
Boiler return 2 with safety connection
B
2.
Thoroughly flush the heating system.
3.
Connect the heating circuits.
!
Please note
Unsuitable water quality can damage the boiler
shell.
Only fill the boiler with water that complies with
the "Water quality requirements" (see service
instructions).
Connections on the heating water side
5799212
