Viessmann 7513244, Инструкция по установке и обслуживанию

Страница: 58 / 152

58
Danger
Escaping gas leads to a risk of explosion.
Check all gas equipment for tightness.
Note
Only use suitable and approved leak detection agents
(EN 14291) and devices for the tightness test. Leak
detection agents with unsuitable constituents (e.g.
nitrites, sulphides) can cause material damage.
Remove residues of the leak detection agent after test-
ing.
Checking the combustion quality
The electronic combustion controller automatically
ensures optimum combustion quality. During commis-
sioning/maintenance, only the combustion values need
to be checked. For this, measure the CO content and
the CO
2
or O
2
content. For a description of the elec-
tronic combustion controller functions, see page 124.
Note
Operate the appliance with uncontaminated combus-
tion air to prevent operating faults and damage.
CO content
■ The CO content must be < 1000 ppm for all gas
types.
CO
2
or O
2
content
■ The CO
2
content must be within the following limits
for upper and lower heating output respectively:
– 7.5 to 9.5 % for natural gas E and LL
– 8.8 to 11.1 % for LPG P
■ The O
2
content must be between 4.0 and 7.6 % for
all gas types.
If the actual CO
2
or O
2
values lie outside their respec-
tive ranges, proceed as follows:
■ Check the balanced flue system for tightness; see
page 47.
■ Check the ionisation electrode and connecting cable;
see page 50.
Note
During commissioning, the combustion controller car-
ries out an automatic calibration. Allow approx. 30 s
after the burner has started before testing the emis-
sions.
Fig. 51
1. Connect a flue gas analyser at flue gas port
A
on
the boiler flue connection.
2. Open the gas shut-off valve, start the boiler and
create a heat demand.
3. Set the lower heating output (see page 58).
4. Check the CO
2
content. Should the actual value
deviate from the aforementioned ranges by more
than 1 %, implement measures detailed on
page 58.
5. Enter the actual value into the report.
6. Set the upper heating output (see page 58).
7. Check the CO
2
content. Should the actual value
deviate from the aforementioned ranges by more
than 1 %, implement measures detailed on
page 58.
8. After testing, press OK .
9. Enter the actual value into the report.
Select higher/lower heating output
Service menu
1. Press
OK and
å
simultaneously for approx. 4 s.
2. "Actuator test"
3. Select the lower heating output:
Select "Base load OFF" . Then "Base load ON"
appears and the burner operates at its lower heating
output.
Commissioning, inspection, maintenance
Checking all gas equipment for tightness at operating pressure
5773 238 GB