GB-9
D
GB
F
NL
I
E
Setting the high-fire rate:
•
Set the air and gas circuit of the burner to high
fire while continuously monitoring the flame.
▷
Avoid CO formation – always operate the burner
with excess air when starting up!
▷
When the desired maximum valve positions are
reached, set the gas pressure p
gas
using the
restrictor upstream of the burner.
p
gas
0
p
atm.
p
0
p
2
p
1
Re-adjusting the air flow rate:
•
Check the air pressure p
air
on the burner and
adjust using the air restrictor if required.
•
When using air restricting orifices: check the air
pressure p
air
and rework the orifice if required.
DANGER
Risk of explosion and poisoning during burner
adjustment with an air deficiency!
Adjust the
gas and air supply so that the burner is always oper-
ated with excess air – otherwise CO will form in the
furnace chamber. CO is odourless and poisonous!
Conduct a flue gas analysis.
•
Measure the gas and air flow rates if possible.
Determine the lambda value and re-adjust the
settings if required.
Tightness test
DANGER
To ensure that there is no danger resulting from a
leak, check the gas connections on the burner for
leaks immediately after the burner has been put
into operation.
1
▷
Avoid condensation due to the furnace atmos-
phere entering the burner housing. While the
burner is switched off, at furnace temperatures
above 500°C (932°F), it must be cooled with a
low air volume – see page 9 (Cooling air).
Cooling air
▷
While the burner is switched off and depending
on the furnace temperature, there must be a cer-
tain air flow for cooling the burner components.
700 800 900 1000 1100 1200 1300 1400
0
6
4
2
5
3
1
0
12
8
4
10
6
2
ZIO
ZIO..KB..E
ZIO..K
Furnace temperature
[
°C
]
Cooling air at 20°C,
air volume at rated capacity
[%]
Cooling air at 450°C,
air volume at rated capacity
[%
]
▷
Diagram: the relative air volume in percentage
values, based on the air volume for the rated ca-
pacity of the relevant size, is given in the diagram.
For hot air (450°C), the values on the right-hand
axis are based on the standard air volume for
the relevant rated capacity.
▷
Leave the air fan switched on until the furnace
has cooled down completely.
Blocking and recording the settings
Produce a measurement report.
Set the burner to low fire and check the settings.
Set the burner to low and high fire several times
while monitoring the pressure settings, flue gas
values and flame patterns.
4
Remove the measuring devices and close off
the test nipples – tighten the grub screws.
5
Block and seal the adjusting elements.
6
Induce a flame failure, e.g. by pulling the plug off
the ionization electrode. The flame detector must
close the gas safety valve and signal a fault.
7
Switch the system on and off several times while
monitoring the automatic burner control unit.
8
Produce an acceptance report.
DANGER
An incorrect change of the burner settings may
change the gas/air ratio and lead to unsafe oper-
ating conditions. Risk of explosion in case of CO
being formed in the furnace chamber! CO is odour-
less and poisonous!
