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Commissioning
Burner power adjusting sequence
The burner is operated and adjusted
using a handheld device or a PC (serial
interface).
For information on startup and
commissioning, see also the separate
instructions for the BT300:
- 420010485601 Description of the unit,
display, settings
- 420010175301 Remote software
- 420010xxxxxx CO/O2 regulation
- 420010178501 List of fault codes
- 420010181501 List of parameters
Before starting up the burner:
• set the control unit in accordance with
the operating instructions for the BT
3xx (Item No.:4200 1048 5601).
• pre-set the safety pressure switches
(see each section: air, gas and fuel oil
pressure switches).
Follow the instructions in the
"Checks" section!
VGD...
MBC...
52
Adjusting sequence
(Short description)
• Switch on burner (switch on control
voltage and control chain),
• The burner program starts
• Adjust preventilation position of air flap
(and also frequency converter if
necessary) in accordance with
required ventilation for boiler system
(see chapter entitled Preventilation)
• Set starting heat output of burner to
max. 33% of nominal load (adjust
primary gas pressure at regulator if
necessary, see section entitled Gas
pressure regulation)
• Burner adjustment over the entire load
range (the primary gas pressure must
be adjusted at the regulator if
necessary, see section entitled Gas
pressure regulation)
• Check power setting and control
behaviour in the event of a load change
• Adjust safety pressure monitor (see
respective chapter Gas, air and oil
pressure monitor)
• Check effectiveness of safety
equipment (flame sensor, air, gas and
oil pressure monitor, leaktightness
checking)
• Save burner control parameters on
external data medium
(recommendation)
Gas pressure setting
VGD gas valve
• Remove protection cap on SKP25.
• Adjust gas pressure pBr (immediately
downstream of double solenoid
valve) using screw S1 (beneath lid)
and a flat screwdriver
• The stroke setting can be read off the
scale X
• After adjusting, the gas pressure setting
must be secured to prevent it from
being altered. This can be done by
securing the lid (cover of S1) using
sealing lacquer.
Other variants of the VDG can be found
in the chapter entitled Double gas valve
VGD.
MBC gas valve
• Set gas pressure pBr using screw S2
• After adjusting, the gas pressure setting
must be secured to prevent it from
being altered. This is done using lead
sealing.
Other variants of the MBC can be found
in the chapter entitled Double gas valve
Dungs MBC.
A gas pressure setting must be selected
that keeps the gas flap as wide open as
possible at maximum burner power. This
provides the best possible fuel control
behaviour over the entire load range.
03/2016 - Art. Nr. 4200 1044 8002A
Please note:
If changes are made to the primary gas
pressure, test all burner power settings.
(O2, power, control range, burning
behaviour, etc.).
Note:
A gas pressure setting must be selected
that keeps the gas flap as wide open as
possible at maximum burner power. This
provides good fuel control behaviour over
the entire load range (see also chapter
entitled Gas pressure control).
Please note:
Gas output pressure (regulator output
pressure) must be adjusted lower than
the input pressure, but higher than the
total gas pressure loss of the heating
plant.
For information on startup and
commissioning, see also the separate
instructions for the BT3xx (No.
420010485601)
Once the burner has been
commissioned, all of the safety
devices must be checked to ensure
correction settings and operation (in
particular, see the Gas/air pressure
switch section).
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