Inspection and service
Condens 5000W – 6720813952 (2019/02)
30
Fig. 67 Opening the burner pressure test nipple at Type 100
Connect pressure gauge.
Set pressure gauge to “0”.
Hold the pressure gauge at the same height when the measurement
is in progress.
Open gas isolation valve.
Bring wall mounted gas condensing boiler into operation.
Make sure that the wall mounted gas condensing boiler can release its
heat.
Start the flue gas inspector mode ( Chapter 7.3).
Set the smallest possible output value (partial load).
Measure gas/air ratio.
This differential pressure must be between -10 and 0 Pa (-0.10 and
0.00 mbar) with partial load. The nominal differential pressure is -5 Pa
(-0.05 mbar).
Remove the cap of the adjusting screw.
Set the gas/air ratio to -5 Pa (-0.05 mbar).
Fig. 68 Setting the gas/air ratio at the Type 70
[1] Cap
[2] Differential pressure incorrect
[3] Differential pressure correct
Fig. 69 Setting the gas/air ratio at the Type 100
[1] Cap
[2] Differential pressure incorrect
[3] Differential pressure correct
Enter the measurement in the maintenance protocol
( Chapter 11.15 "Inspection and maintenance reports").
Switch off flue gas inspector mode.
Take the wall mounted gas condensing boiler out of operation.
Close gas isolation valve.
Remove the pressure gauge.
Close test nipple.
Mount the cap once again on the adjusting screw.
Open gas isolation valve.
Bring wall mounted gas condensing boiler into operation.
11.10 Measure CO/CO
2
content
See chapter 8.9 "Measure the CO and CO2 content".
11.11 Check flue gas pressure-relief valve
If an overpressure cascade system has been fitted in the wall mounted
gas condensing boiler, the flue gas pressure-relief valve must be
checked.
Open inspection aperture [1] of flue gas pressure-relief valve.
Check flue gas pressure-relief valve [2] for wear, damage or soiling
and replace if necessary.
Close the inspection aperture of the flue gas pressure-relief valve.
Fig. 70 Checking the flue gas pressure-relief valve
[1] Inspection aperture
[2] Flue gas pressure-relief valve
6 720 807 034-066.1DDC
1
0010010059-001
-5 Pa
-10 Pa
0 Pa
5 Pa
-15 Pa
1
2
3
3
2
0010010060-001
-5 Pa
-10 Pa
0 Pa
1
2
3
3
2
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