GB-9
D
GB
F
NL
I
E
•
Check the position of the restrictor in the air line.
•
Check the fan.
•
Reset the automatic burner control unit and re-
ignite the burner.
▷
The burner ignites and proceeds to normal op-
eration.
•
Check flame stability and ionization current at
low fire. Switch-off threshold – see automatic
burner control unit operating instructions.
+
μ
A
–
Z
I
•
Monitor flame formation.
•
Adjust the low-fire rate settings if required.
•
If no flame forms – see page 12 (Assistance in the
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 1500
0
6
4
2
5
3
1
0
12
8
4
10
6
2
ZIC
ZIC..KB..E
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.
