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2 Installation

20 Installation and maintenance instructions Logano GE315 • Issue 02/2006

We reserve the right to make any changes due to technical modifications.

z Slowly fill the boiler with water through the drain cock.

At the same time vent the system at the boiler flow

connection.

z If a hub connection is leaking, first drain the water

through the drain cock.

z Remove the return header.

z Remove the nuts from the four tie bars and then the

bars themselves.

z Separate the boiler sections by driving (hammering)

flat wedges or chisel at the points provided

(Fig. 22,

Item 1 & 2) at the top and bottom between the

relevant sections.

You must use new nipples and gaskets for the re-

assembly. Draw the boiler sections together and re-test

for leaks.

2.5.2 Test pressure

The test pressure during the leak test depends on the

design pressure for each individual heating system and

should be 1.5 times nominal pressure (normally 7.8 bar

for 30 minutes).

Use a pressure gauge class 1.0 for measuring the

pressure.

z The weld neck flange is fitted to the upper boiler hub

(Fig. 23, Item 6 – return connection) when the return

is installed later.

The illustration shows the weld neck flange and the

flat gasket

(Fig. 23, Item 4 & 5).

z The flow connection flange (Fig. 23, Item 3) and the

flat gasket (Fig. 23, Item 2) are required for the flow

connections which is fitted later (Fig. 23, Item 1).

Fig. 22 Separating the boiler block

Fig. 23 Connection flange installation

Buderus Logano GE315 Installation And Maintenance Instructions

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