06/2016 - Art. Nr. 4200 1041 1103A32
Commissioning
Setting the gas pressure switch
Setting the air pressure switch
Setting the min. gas pressure switch
• To set the switch-off pressure: remove
the gas pressure switch cover.
• Install a gas pressure pBr measuring
instrument.
• Start the burner. Switching to
maximum power.
• Reduce the pressure upstream of the
gas train by gradually closing the
manual valve, until
- the gas pressure pBr upstream of
the gas train drops
- the stability of the flame is reduced
- the CO level increases
- or the flame signal deteriorates
considerably
• Turn the dial clockwise until the gas
pressure switch shuts down the
burner.
• Continue turning the dial clockwise to
set the gas pressure switch to 10%
above the shutdown value determined
above.
Checking the switch-off pressure
• Open the manual shut-off valve
• Start the burner
• Close the manual shut-off valve
The gas failure procedure should start
without the control unit locking.
Setting the air pressure switch
• Install a pressure measuring device.
To do this, install a T union in the air
tube.
• Set the burner to its maximum
operating power.
• Set the switch-off point to
approximately 15% below the switch-
off pressure read.
Max. gas pressure switch (with PED
option)
Remove the protective cover. At the
rated output, measure the gas flow
pressure and calculate the switch-off
pressure by increasing by approximately
20% (no more than 30% under any
circumstances). Adjust the graduated
disc to the desired switch-off pressure
opposite the arrow (the graduations are
approximate values). Operate the
burner at minimum power. If the max.
gas pressure switch switches off the
burner, increase the adjustment value
but not to more than 130% of the flow
pressure at the rated output.
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