Leak Test; Carrying Out Leak Test; Sealing Leaks - Buderus Logano G315 Installation And Service Instructions Manual

7.6

Leak test

Perform 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, see
page 36.
7.6.1

Carrying out leak test

NOTICE: Risk of system damage from
overpressure.
B Ensure that no pressure, control or safety
equipment is fitted during leak tests.
The testing pressure is based on the normal operating
pressure of the heating system and should be 1.3 times
that pressure, and in any case no less than 58 psi (4 bar).
Use a pressure gauge class 1.0 to measure the pressure.
B Close off lower boiler hub (Fig. 23, [3]) at the front and
rear. To do this, place corresponding seal (Fig. 23, [1])
on the relevant boiler hub and seal-in the relevant
sealing plug. In this case, the sealing plug with the R ¾
tapped hole for the fill and drain connection (Fig. 23,
[2]) is mounted on the rear of the boiler.
B Install the on-site fill and drain valve.
B Close off supply and return connections (mount flange
with purger on supply connection).
Fig. 23 Fitting the flange
B Slowly fill the boiler with water via the fill and drain
connection. While doing this, purge the boiler via the
boiler flow connection with purger.
Logano G315 - Subject to technical modifications
7.6.2
B If a hub connection is leaking, first drain the water
through the fill/drain valves.
B Remove supply pipe.
B Undo nuts on four tie rods and remove tie rods.
B Separate the boiler at the leak location by driving
Chapter 10,
(ponding) in flat wedges or chisels between the
sections at the designated points (Fig. 24, [1 and 2])
at the top and bottom.
Fig. 24 Separating the boiler block
Boiler block assembly

Sealing leaks

B Use new nipples and new sealant rope for
the reassembly.
B Pull the boiler back together and repeat
the leak test.
7
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