25
3.
Top up your heating system with
water until the filling pressure of a
cooled system is 0.1 to 0.2 bar higher
than the pre-charge pressure of the
diaphragm expansion vessel.
Permiss. operating pressure: 4 bar
Checking gas equipment for tightness at operating pressure
Danger
Escaping gas leads to a risk of
explosion.
Check gas equipment for tight-
ness.
Note
For the tightness test, use only suitable
and approved leak detecting agents (EN
14291) and devices. Leak detecting
agents with unsuitable constituents (e.g.
nitrites, sulphides) can lead to material
damage.
Remove residues of the leak detecting
agent after testing.
Flue gas emissions test
The electronic combustion controller automatically ensures an optimum combustion
quality. Only the combustion values need to be checked during commissioning and
maintenance. For this, check the CO
2
or O
2
content. For a description of the electronic
combustion controller functions, see page 132.
Note
Operate the appliance with uncontaminated combustion air to prevent operating
faults and damage.
CO
2
or O
2
content
The CO
2
content must be within the following limits (upper and lower output):
■ 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, check the balanced
flue system for tightness, see page 18.
Note
During commissioning, the combustion controller carries out an automatic calibration.
Only test the emissions approx. 30 s after the burner has started.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5692 843 GB
Summary of Contents for Vitodens 200 WB2C 45
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