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4
Installation
Logano GE615 - Subject to technical modifications.
20
B Push outer steam tube element with spring (L
3
)
first into the lower boiler hub.
B Hook the other outer steam tube elements (L
2
) onto
each other as shown in the detail drawing.
B Hook on the outer steam tube element with the handle
(L
1
) last.
B Close off lower boiler hub with flat gasket and dummy
flange.
Fig. 24 Inserting the outer steam tube
1 Outer steam tube element L
3
2 Outer steam tube element L
1
3 Gasket
4 Dummy flange
5 Outer steam tube element L
2
4.9 Boiler block pressure test (only
when supplied in loose sections)
A boiler block pressure test must be carried out (only
when supplied in loose sections). If supplied as a pre-
assembled block, the pressure test has already been
carried out in the factory.
For the further installation of a pre-assembled boiler block,
(Æ see Chapter 4.11.4, page 23).
4.9.1 Preparing for pressure test
B Close off flow and return connections (flow connection
flange with air vent valve).
B Slowly fill the boiler block with water via the fill and
drain connection. Vent the boiler block via the boiler
flow connection with air vent.
4.9.2 Perform pressure test
Carry out a pressure test with a test pressure of 8.6 bar
(in accordance with the requirements of the European
Pressure Vessel Directive).
Use a pressure gauge class 1.0 to measure the pressure.
B Drain water via fill and drain valve (Æ Fig. 23, [1],
page 19) upstream of the connection to the water
system, or if a hub joint is leaking.
4.9.3 Leaking hub joint
If you establish during the pressure test that hub joints are
leaking, follow the procedure described below.
The length and number of outer steam tube
elements depend on the boiler rating, and
can be worked out using the Æ Tab. 11
below.
Elements 9 10 11 12 13 14 15 16
L
1
480 mm1– 1– 1–
650 mm – 1 1 – 1 – 1 1
L
2
510 mm 1 1 – 2 2 – 3
680 mm – – 1 – – 2 2
L
3
450 mm 1
Tab. 11 Length and number of outer steam tube
elements
WARNING: Risk of accident as a result of
ignoring the safety regulations.
B Observe the relevant country-specific
standards, work safety legislation and
regulations for carrying out pressure tests.
NOTICE: Risk of system damage from
excessive pressure.
B The boiler block must not be connected to
the pipework of the heating system.
20


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