Checking The Sensor Well And All Connections On The Heating Water Side For Tightness - Viessmann Vitocrossal CRU 800 Service Instructions Manual

Commissioning, inspection, maintenance
Checking the sensor well and all connections on the heating water side for
tightness
Note
For a clearer overview of the connections, the boiler is
shown without cladding.
A
B
Fig. 2
Female connection for control equipment: R
A
Boiler flow: PN 6, DN 100 with sensor well for
B
boiler water temperature sensor
Female connection for pressure limiter: R
C
D Safety connection (safety valve): R 2
Boiler return 2: PN 6, DN 100
E
Boiler return 1: PN 6, DN 100
F
Drain outlet: R 1
G
¼
Condensate drain: R
H
12
C
D
½
½
½
E
F
G
H