7
Boiler block assembly
Logano G615 - Subject to technical modifications
26
7.7
Leak test
Conduct a leak test of the boiler block only when the
boiler was delivered disassembled. Pre-assembled
blocks are leak tested at the factory.
For details of assembling the remainder of the boiler if the
block is delivered pre-assembled
Æ
see Chapter 7.9.4,
page 29.
7.7.1
Carrying out leak test
The leak test must be performed with a test pressure of
125 psi (8.6 bar). Use a suitable pressure gauge to
measure the pressure.
B
Drain the water from the fill and drain valve (
Æ
Fig. 24,
[1], page 25), at the water supply connection, or at a
leaky hub connection.
B
Close off supply and return connections (supply
connection flange with air vent valve).
B
Slowly fill the boiler block with water via the fill and
drain connection. Purge the air from the boiler block via
the boiler supply connection with purger.
7.7.2
Seal leaks.
If leaky hub connections are discovered during the
pressure test, proceed as follows.
B
Remove supply pipe and lower distribution tube.
B
Undo nuts on tie rods and remove tie rods.
B
Separate the boiler block at the leak location by driving
(knocking) in flat wedges or chisels between the
sections at the points provided at the top and bottom
(
Æ
Fig. 26).
Fig. 26 Separating the boiler block
WARNING:
Danger of life from neglecting to
follow safety regulations.
B
Observe the applicable national
standards, occupational safety provisions
and regulations for executing leak tests.
NOTICE:
Risk of system damage from
overpressure.
B
Ensure that no pressure, control or safety
equipment is fitted during leak tests.
Use new nipples and new sealant rope for
the reassembly.
B
Pull the boiler back together and repeat
the leak test.
6 720 642 625-23.1o
