03/2013 - Art. Nr. 4200 1032 7200A
22
Commissioning
Setting the gas pressure switch
Setting the air pressure switch
Saving the adjustment values in the display
Setting the gas pressure switch
• To set the switch-off pressure: remove
the cover from the gas pressure
switch.
• 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.
Saving the adjustment values in the display
If the burner setting procedure has been successfully completed,
the servomotor positions for all the operating states will be fixed in
the control unit. A back-up copy of the values is therefore stored in
the display.
In order to visualize them, press the button
, the screen opposite
is displayed. Using the button
select the menu
"Save
adjustment values"
and confirm with the button
.
The screen opposite appears. The adjustment data have been
stored in the display.
At this point, it is possible to exit the menu in one of two ways:
- positioning the cursor on the
symbol and confirm with the
button.
- using the
symbol.
