ZIC · Edition 09.22
EN-9
+
μ
A
–
Z
I
13
Monitor flame formation.
14
Adjust the low-fire rate settings if required.
15
If no flame is detected – see page 11 (8 Assis-
tance in the event of malfunction).
6.3 setting the high-fire rate
1
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 re-
strictor upstream of the burner.
p
gas
0
p
atm.
6.4 Readjusting the air flow rate
1
Check the air pressure p
air
on the burner and adjust
using the air restrictor if required.
2
When using air restricting orifices: check the air
pressure p
air
and rework the orifice if required.
DAnGeR
Risk of explosion and poisoning in case of burner
adjustment with insufficient air!
– Adjust the gas and air supply so that the burner
is always operated with excess air – otherwise
CO will form in the furnace chamber. CO is
odourless and poisonous! Conduct a flue gas
analysis.
3
Measure the gas and air flow rates if possible. De-
termine the lambda value and readjust the settings
if required.
6.5 tightness test
DAnGeR
Escaping gas!
Danger from a leakage at the gas connections.
– Check the gas connections on the burner for
leaks immediately after commissioning the
burner.
1
2
➔
Avoid condensation due to the furnace atmos-
phere entering the burner body. 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 (6.6 Cooling air).
6.6 Cooling air
➔
While the burner is switched off and depending on
the furnace temperature, there must be a certain air
flow for cooling the burner components.
600
500
700
800
900 1000 1100 1200 1300 1400
0
12
14
8
4
10
6
2
16
BIC/ZIC*
BIC/ZIC..(..E)*
T
furnace
°C
% of cooling air
* also BIOW/ZIOW
➔
Diagram: the cooling air percentage specified in
the diagram refers to the operating flow rate for air.
➔
Leave the air fan switched on until the furnace has
cooled down completely.
6.7 Blocking and recording the settings
1
Produce a measurement report.
2
Set the burner to low fire and check the settings.
3
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 terminal
boot off the flame rod. 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
Risk of explosion in case of CO being formed
in the furnace chamber! CO is odourless and
poisonous!
An incorrect change of the burner settings may
change the gas/air ratio and lead to unsafe operat-
ing conditions:
– All interventions may only be carried out by
qualified gas technicians.
7 MAIntenAnCe
➔
Maintenance and function check every six months.
If the media are highly contaminated, this interval
should be reduced.
DAnGeR
Risk of explosion!
– Please observe the appropriate precautions
when igniting the burner.
