General Work; Internal Leak Test; Determining The Test Volume - Buderus Logano plus GB402 Installation And Maintenance Instructions For Contractors

Fig. 39 Removing the front panel
[1] Front panel
Pipe length
[m]
1
2
3
4
5
6
7
8
9
10
Table 15 Pipework volume (V
pipe
Pipe length
[m]
1
2
3
4
5
6
7
8
9
10
Table 16 Pipework volume (V
pipe
Logano plus GB402 – 6 720 820 700 (2018/01)
½ ¾
0.2 0.4
0.4 0.7
0.6 1.1
0.8 1.5
1.0 1.8
1.2 2.2
1.4 2.5
1.6 2.9
1.8 3.3
2.0 3.6
) subject to pipe length and diameter
15 x 1 18 x 1
0.1 0.2
0.3 0.4
0.4 0.6
0.5 0.8
0.7 1.0
0.8 1.2
0.9 1.4
1.1 1.6
1.2 1.8
1.3 2.0
) subject to pipe length and diameter
10.2

General work

The following work is not described in any further detail in this
document. It must, nevertheless, still be carried out:
▶ Check the general condition of the heating system.
▶ Visual inspection and function check of the heating system.
▶ Check the ventilation air and flue gas routing for function and safety.
▶ Check all gas and water pipes for signs of corrosion.
▶ Replace any corroded lines.
▶ Check the pre-charge pressure of the diaphragm expansion vessel.
▶ Check the concentration of any antifreeze/additives that may be
used in the system fill/top-up water annually.
▶ If necessary, check installed water treatment cartridges (in the
backfeed section) to ensure they are functioning correctly and for
wear.
10.3

Internal leak test

10.3.1 Determining the test volume

V = V = V + V
test total pipe
▶ Determine the length of pipe to the main fuel shut-off valve.
▶ Determine the gas train volume (V
▶ Determine the pipe volume (V
▶ Calculate the test volume (V
Gas valve volume (approximate values)
Gas valve volumes up to 50 kW
Gas valve volume > 50 kW
Table 14 Gas train volume (V
Pipework volume (V ) [l]
pipe
Pipework diameter [inch]
1 1¼
0.6 1.0
1.2 2.0
1.7 3.0
2.3 4.0
2.9 5.1
3.5 6.1
4.1 7.1
4.6 8.1
5.2 9.1
5.8 10.1
Pipework volume (V ) [l]
pipe
Pipework diameter (copper pipe) [mm]
22 x 1 28 x 1.5
0.3 0.5
0.6 1.0
0.9 1.5
1.3 2.0
1.6 2.5
1.9 2.9
2.2 3.4
2.5 3.9
2.8 4.4
3.1 4.9
Inspection and servicing
gas train
) using table 14.
gas train
) using table 15 and table 16).
pipe
) according to the above equation.
test
)
gas train
1½
1.4
2.7
4.1
5.5
6.9
8.2
9.6
11.0
12.4
13.7
35 x 1.5
0.8
1.6
2.4
3.2
4.0
4.8
5.6
6.4
7.2
8.0
10
0.1
0.2
2
2.2
4.4
6.6
8.8
11.0
13.2
15.4
17.6
19.8
22.0
45 x 1.5
1.4
2.8
4.2
5.5
6.9
8.3
9.7
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