Measuring The Co Content - Viessmann MatriX-Disk burner Service Instructions For Contractors

Commissioning, inspection, maintenance
Checking the static pressure and supply pressure
2. Measure the supply pressure (flow pressure) at
rated heating output.
Natural gas E/LL
■ Set value: 17 to 25 mbar (1.7 to 2.5 kPa)
Nominal supply pressure: 20 mbar (2 kPa)
■
Note
■ The nominal supply pressure can differ from
these values subject to region; see type plate of
the burner.
■ Gas pressure switch 1 on the gas train is set to
10 mbar (1.0 kPa).
i.e. the burner cannot be operated at a gas sup-
ply pressure below 10 mbar (1.0 kPa).
Note
Use a suitable measuring device with a resolution
of at least 0.1 mbar (0.01 kPa) to check the supply
pressure.
Supply pressure Measure
(flow pressure) nat-
ural gas E and LL
< 10 mbar Do not make any adjustments.
< 1.0 kPa Notify the gas supply utility.
10 to 17 mbar Please note: The boiler may only be operated temporarily with this setting (emergency
1.0 to 1.7 kPa mode). Reduce the max. heating output sufficiently to achieve a flow pressure of min.
15 mbar at the corresponding output.
Notify the gas supply utility.
17 to 25 mbar Start the boiler.
1.7 to 2.5 kPa
> 25 mbar Install a separate gas pressure governor with zero off upstream of the boiler system.
> 2.5 kPa
!
Note
The nominal supply pressure must be set subject to regional conditions, see type plate of
the burner.
Measuring the CO
Programming unit on the burner control unit
Status Service
R
S
Fig. 7
16
Please note
Excessive flow pressure can damage the burner.
Only operate the boiler temporarily with a setting > 25 mbar (emergency mode).
content
2
(cont.)
3. Record the actual value in the report.
4. Switch off the ON/OFF switch at the programming
unit of the Vitotronic control unit.
5. Close the gas shut-off valve.
6. Remove pressure gauge. Close test connector
with the screw.
7. Open the gas shut-off valve. Start up the appli-
ance. Check gas tightness at test connector
Danger
Gas escaping from the test connector leads
to a risk of explosion.
Check for gas tightness.
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.
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