Bosch Condens 7000 F - General Work; Internal Tightness Test; Determining the Testing Volume

Inspection and maintenance
33
Condens 7000 F – 6720871560 (2019/11)
11.3 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 supply air and flue gas routing for function and safety.
 Check all gas and water pipes for signs of corrosion.
Replace any corroded pipes.
 Check the pre-charge pressure of the 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.
 During commissioning and the annual inspection, check all
regulating, control and safety equipment for correct function and,
where applicable, for correct settings.
11.4 Internal tightness test
11.4.1 Determining the testing volume
 Measure the length of the pipeline up to the fuel shut-off valve.
 Calculate using value for volume of air/gas ratio control valve
(Table 11).
Table 11 Volume of air/gas ratio control valve
 Determine the pipe volume (V
pipe
) using table 12 and table 13.
 Calculate the test volume (V
test
) using the equation.
V
test
= V
tot
= V
pipe
+ V
air/gas ratio control valve
Table 12 Pipework volume (V
pipe
) in litres, subject to pipe length and diameter
Table 13 Pipework volume (V
pipe
) in litres, subject to pipe length and diameter
Boiler size [kW] Volume of air/gas ratio control valve
V
Air/gas ratio control valve
[l]
75-100 0.035
150-300 0.060
Pipe length Pipework diameter [inch]
[m] ½ ¾ 1 1 ¼ 1 ½ 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
Pipe length Pipework diameter [mm] (copper pipe)
[m] 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 –