29
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
B
C
E
F
G
D
Fig. 26
A
Boiler return
400 to 620 kW: PN 6 DN 100
B
Safety connection (safety valve and air vent valve)
G 1
½
C
Female connection for control equipment R
½
(e.g.
minimum pressure switch)
D
Boiler water temperature sensor
E
Boiler flow
400 to 620 kW: PN 6 DN 100
F
Drain and expansion vessel connection R 1
G
Condensate drain R
½
1.
Thoroughly flush the heating system.
2.
Connect the heating circuits.
Making the safety connections
1.
Make the safety connection.
2.
Check the connections on the heating water side
for leaks.
Permiss. operating pressure: 6 bar (0.6 MPa)
Test pressure:
7.8 bar (0.78 MPa)
Connections on the heating water side
5833527
