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7
Boiler block assembly
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.
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
thoroughly before connecting the new boiler.
▶ Install a desludging unit in the boiler return to
prevent damage to the boiler.
The weld neck flange is fitted to the upper boiler hub ( Fig. 28, [3] –
return connection) if the return is connected at a later stage.
The weld neck flange and flat gasket are shown ( Fig. 28, [4 and 5]).
▶ The supply connection flange ( Fig. 28, [1]) with flat gasket
( Fig. 28, [2]) is required for connecting the supply at a later
stage.
1
Fig. 28 Fitting a flange
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.
20
7.8
Next step in the assembly process is to install the burner door and draft
diverter. The pre-assembled boiler comes with these components
already installed.
7.8.1
The GP sealant rope (fiberglass cord with silicon casing) which forms a
seal is inserted in the draft diverter at the factory.
▶ Place the draft diverter onto the four threaded studs on the rear
2
4
Fig. 29 Fitting the draft diverter
7.8.2
If the cleanout covers have been removed in order to attach the
installation aid to the rear section:
▶ Screw the cleanout covers with washers and nuts back onto the rear
5
6 720 642 62 -26.1o
Fig. 30 Fitting the cleanout cover
Installing draft diverter, baffles and burner door
Positioning the draft diverter
section ( Fig. 29 [1 to 4]) and secure using washers and nuts.
4
2
Screwing cleanout cover onto rear section
section ( Fig. 30, [1 and 2]).
1
Logano G515 – 6 720 647 208 (2014/09)
1
6 720 642 62 -27.1o
2
720 42 23-28.1o
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