Changeover From Liquid Gas P To Natural Gas; Checking The Exhaust Gas Installation; Training The Operator - Vaillant atmoCRAFT VK 654/9 Installations- Und Wartungsanleitung

6 Start-up

6.2.7 Changeover from liquid gas P to natural gas

Changing the nozzles
1
Fig. 6.5 Changing the nozzles
• Turn the boiler off.
• Replace the ignition burner nozzle (1x24) (1) by the
nozzle for natural gas E(H) (2x27).
• Unscrew the burner nozzles for liquid gas P (165) (2)
and screw in the burner nozzles for natural gas E(H)
(260) gas-tight.
Start-up and setting
Caution!
Observe the instructions for gas connection in
Chapter 6.2 in the installation instructions.
• Start the boiler up in accordance with Chapter 6 of the
installation instructions.
• Re-set the nozzle pressure in accordance with Chapter
6.2.3 of the installation instructions.
• Check all the screwed connections which have been
released and tightened again during the changeover
for tightness using leak testing spray.
• Remove the sticker "changed over to liquid gas" from
the gas distributor pipe.
Note!
Keep the components removed during the
changeover and this fitting instruction for
possible future refitting.

6.2.8 Checking the exhaust gas installation

Note!
The position of the exhaust gas connection can
be taken from the figure 4.22. Take particular
care that the exhaust gas pipe runs upwards
towards the chimney.
30
The checking of the exhaust gas installation for correct
exhaust gas removal must be undertaken under the
following operating conditions:
• The windows and doors in the installation room must
be closed.
• The specified ventilation devices must not be closed
off, obstructed or retricted.
• The recommended chimney draught must be at least
0.03 mbar and must not exceed 0.09 mbar.
Note!
The lower the chimney draught within the
permissible range, the higher is the combustion
technology efficiency of the gas combustion
location.
2
Caution!
The lower value of the chimney draught must
not be reduced further because of the
requirement for correct exhaust gas removal.
The upper value of the chimney draught must
not be exceeded in order to achieve a gut
degree of efficiency.
At a chimney draught of less than 0.03 mbar or
more than 0.09 mbar, the unit must not be
started up.
Note!
In the event of the chimney draught being more
than 0.09 mbar or less than 0.03 mbar, consult
the district chimney sweep (or smoke capture
cleaner) for assistance.
• The exhaust gas loss measurement in accordance with
BlmSchV must also be performed under the above
operating conditions.
6.3

Training the operator

The operator of the heating installation must be
instructed in the handling and functions of his heating
installation. The following measures need to be specially
taken into account:
• Hand all instructions and installation papers over to
the operator for storage. Tell the owner to keep the
manuals nearby the unit.
Caution!
When you have finished the installation, attach
the sticker supplied (835 593) to the appliance
in the user's language.
• Tell the owner about any measures taken to ensure
the combustion air supply and flue gas extraction,
making it very clear that they may not be altered.
• Explain to the user how to check the required water
level/filling pressure of the plant as well as measures
for refilling and bleeding the heating system if needed.
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