Viessmann Vitodens 333-F, Инструкция по эксплуатации

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4. Close flap
D
.
Checking the combustion quality
The electronic combustion control unit automatically ensures an optimum com-
bustion quality. Only the combustion values need to be checked during commis-
sioning and maintenance. For this, check the CO
2
or O
2
content. For a function
description of the electronic combustion control unit, see page 115.
CO
2
or O
2
content
& The CO
2
content must be within the following ranges (upper and lower out-
put):
–
7.7 to 9.2% for natural gas E and LL
–
9.3 to 10.9% for LPG P
& For all gas types, the O
2
content must be between 4.4% and 6.9%.
If the actual CO
2
or O
2
values lie outside their respective ranges, proceed
with the following steps:
& Check the balanced flue system for tightness, see page 19.
& Check the ionisation electrode and connecting cable, see page 23.
&
Check the parameters of the combustion control unit, see page 97.
Note
During commissioning, the combustion control unit carries out an automatic
calibration. This may lead to CO emissions in excess of 1000 ppm for a short
time.
1. Connect a flue gas analyser at flue
gas port
A
on the boiler flue con-
nection.
2. Open the gas shut-off valve, start
the boiler and create a heat
demand.
3. Adjust the lower output.
Constant temperature control
unit:
K
+
d
press simultaneously:
"1" is shown.
Further details regarding the individual steps
(cont.)
31
Commissioning, inspection, maintenance
56
92
682
GB