Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
7 Commissioning
83309302 1/2018-05 La
117-196
7.3 Check soundness of flue gas system
For room air independent operation, the soundness of the flue gas system must be
checked by means of an O
2
measurement.
Guide the hose
2
via the measuring point in the supply air annular gap
1
into
the appliance.
Seal the measuring point in the supply air annular gap.
Connect the measuring probe
3
to the hose.
Mount the front panel.
Activate chimney sweep function.
Carry out O
2
measurement at maximum load.
Adhere to a measuring period of at least 5 minutes.
It is admissible for the O
2
content to fall short of the measured values of the ambi-
ent air by 0.2 % at the most.
1
3
2
7.4 Adjust capacity
Maximum load
If required, the maximum load can be changed via parameter
2.1.2 Maximum
load heating mode
Minimum load
If required, the minimum load can be changed via parameter
2.3.4 Correct
minimum load
Flue gas pipe length
The capacity adjustment for the flue gas pipe length is set via parameter
2.3.3 Correction speed for flue gas length