16
8.
7.
Fig. 9
A
Caps G 1
½
(if no DHW cylinder is to be connec-
ted)
B
Expansion vessel connection
Note
Fit front thermal insulation
C
only after the system
has been filled and tested for leaks.
Service instructions
Making the safety connections
Install the safety lines.
Minimum cross-sections
■
Safety valve discharge pipe:
DN 20 (R
¾
)
■
Connection of the expansion vessel, e.g. via the sup-
plied tee on the safety equipment block (Rp
½
)
Permiss. operating pressure: 3 bar (0.3 MPa)
Test pressure:
4 bar (0.4 MPa)
Low water indicator
Tests have verified that the low water indicator speci-
fied by EN 12828 is not required.
Note
The boiler safety equipment block is fitted with a safety
valve.
Installation sequence
Mounting and connecting the safety equipment…
(cont.)
6136330
Installation