Installation Instructions

7
Boiler block assembly
Logano G315 – 6 720 817 939 (2016/04) 19
Fig. 26 Supply flange with safety components
[1] Low water cut-off (LWCO)
[2] System connection
[3] Optional
[4] Optional
[5] Aquastat
[6] Boiler connection
[7] Supply sensor well
7.7 Boiler water connections
Please observe the following information regarding the boiler
connection to the system side. These instructions are important for
trouble-free operation.
The weld neck flange is fitted to the upper boiler hub (Fig. 27, [6]) –
return connection) if the return is connected at a later stage.
The weld neck flange and flat gasket are shown (Fig. 27, [4 and 5]).
▶ The supply connection flange (Fig. 27, [3]) with flat seal (Fig. 27,
[2]) is required for connecting the supply at a later stage (Fig. 27,
[1]).
Fig. 27 Fitting a flange
6 720 817 939-13.1T
6
5
2
3
4
7
1
NOTICE: Risk of system damage from leaking
connections.
▶ All pipe connections to the boiler must be free of
stress and tension.
NOTICE: System damage from deposits, local
overheating, and corrosion.
▶ As a basic rule, clean and flush existing systems
before connecting the new boiler.
▶ Install a desludging unit in the boiler return to
prevent damage to the boiler.
The boiler supply and return manifolds are included in
the Buderus scope of delivery.
NOTICE: Risk of system damage from temperature
stresses.
▶ Install a fill valve on the system side.
▶ When the heating system is in operation, do not fill it
via the boiler fill & drain valve. Instead, use the fill
valve on the system side.