02/2017 - Art. Nr. 4200 1015 6700D
23
Start up
Air regulation
Oil pressure regulation
Operating check
Positioning
1
Air volume regulating knob
2
Air volume graduated scale
3
Recirculation opening graduated
scale
4
Recirculation opening adjusting
screw (varnished in the factory)
6
Air intake adjuster
7
Adjustment screw for air intake
adjuster
Air intake adjuster 6
is set at the
factory. (
not valid for VB1.47
)
Position 1 = max. blower pressure
Position 5 = min. blower pressure
In cases where a higher blower pressure
proves a disadvantage, e.g. large
negative pressure in the combustion
chamber, the pressure can be reduced
by adjusting the air intake adjuster:
• Loosen adjustment screw
7
• Set air intake adjuster to the new value
• Tighten the screw again.
Oil pressure regulation
The oil pressure, and therefore burner
output, is adjusted using oil pressure
regulator
2
in the pump.
Turn:
- right: higher pressure,
- left: lower pressure.
Connect a pressure gauge at point
6
(with R1/8" thread).
Checking negative pressure
The vacuum meter for checking
negative pressure must be connected to
point
1
, R1/8". Maximum permissible
negative pressure is 0.4 bar. At higher
negative pressures, the fuel oil gasifies,
which causes scraping noises in the
pump.
The
airflow
is adjusted by turning
regulating knob
1
.
Turn the regulating knob
- clockwise to reduce airflow and
increase CO
2
- anti-clockwise to increase airflow and
reduce CO
2
The adjustment value defined in the
adjustment table can be read from
control scale
2
.
Fine adjustment requires the use of a
suitable gauge. A CO
2
value of 12.5% -
13.5% must be set.
Setting recirculation
The recirculation opening is preset at
the factory (adjustment screw
varnished).
It does not normally need to be adjusted.
In the event of output changes, see the
setting table on page
22.
An NO and CO meter must be
connected in order to set the
recirculation quantity correctly.
The width of the recirculation opening is
set by shifting the combustion head in
the burner pipe longitudinally.
Positioning takes place at adjusting
screw
3
in accordance with the value
specified in the setting data table. This
value can be read at scale
4
. Once
recirculation has been adjusted, a new
start attempt should be made after
pausing operation for approximately 5
minutes. If the burner does not start or
does not start on time, the recirculation
must be adjusted to smaller scale values
until safe start can be ensured (cold
start).
Do not operate the burner with the
recirculation opening closed, or open
too little. This would cause the
temperature of the combustion head
to rise significantly and could cause
damage to the combustion head.
Operating check
Flame monitoring must be checked for
safety as part of initial commissioning
and also after servicing or if the system
has been out of operation for any
significant period of time.
- Starting attempt with flame monitor
unlit: The automatic combustion
control unit must switch to malfunction
at the end of the safety time
- Start with flame monitor lit: The
automatic combustion control unit
must switch to malfunction after 10
seconds of preventilation
- Normal start; flame monitor goes out
when burner in operation: The
automatic combustion control unit
must switch to malfunction after the
restart and end of the safety time
en
