9
Inspection and maintenance
Logano plus GB402 - Subject to technical modifications!
41
9.3
Internal leak test
9.3.1
Determining the test volume
V
test
= V
total
= V
pipe
+ V
gas valve
B
Determine length of pipe to main fuel shut-off valve.
B
Determine the gas valve volume (V
gas valve
) using
Tab. 12.
B
Determine the pipework volume (V
pipe
) using Tab. 13
and Tab. 14.
B
Calculate test volume (V
test
) according to above
equation.
Gas valve volume (approximate values)
Gas valve volumes up to 50 kW
0.1 litres
Gas valve volume > 50 kW
0.2 litres
Tab. 12 Gas valve volume (V
gas valve
)
Pipe length
Pipework volume (V
pipe
) in litres
Pipework diameter in inches
in metres
½
¾
1
1¼
1½
2
1
0.2
0.4
0.6
1.0
1.4
2.2
2
0.4
0.7
1.2
2.0
2.7
4.4
3
0.6
1.1
1.7
3.0
4.1
6.6
4
0.8
1.5
2.3
4.0
5.5
8.8
5
1.0
1.8
2.9
5.1
6.9
11.0
6
1.2
2.2
3.5
6.1
8.2
13.2
7
1.4
2.5
4.1
7.1
9.6
15.4
8
1.6
2.9
4.6
8.1
11.0
17.6
9
1.8
3.3
5.2
9.1
12.4
19.8
10
2.0
3.6
5.8
10.1
13.7
22.0
Tab. 13 Pipework volume (V
pipe
) subject to pipe length and diameter
Pipe length
Pipework volume (V
pipe
) in litres
Pipe diameter in mm (copper pipe)
in metres
15 x 1
18 x 1
22 x 1
28 x 1.5
35 x 1.5
45 x 1.5
1
0.1
0.2
0.3
0.5
0.8
1.4
2
0.3
0.4
0.6
1.0
1.6
2.8
3
0.4
0.6
0.9
1.5
2.4
4.2
4
0.5
0.8
1.3
2.0
3.2
5.5
5
0.7
1.0
1.6
2.5
4.0
6.9
6
0.8
1.2
1.9
2.9
4.8
8.3
7
0.9
1.4
2.2
3.4
5.6
9.7
8
1.1
1.6
2.5
3.9
6.4
-
9
1.2
1.8
2.8
4.4
7.2
-
10
1.3
2.0
3.1
4.9
8.0
-
Tab. 14 Pipework volume (V
pipe
) subject to pipe length and diameter
