BIC · Edition 09.22
EN-11
➔
Burners without gas measuring orifice:
when
the desired maximum valve positions are reached,
set the gas pressure p
gas
using the restrictor up-
stream of the burner.
p
gas
0
p
atm.
➔
Burners with gas measuring orifice:
set the
differential pressure Δp
gas
using the gas restrictor
or via the integrated flow adjustment.
p
1
p
2
0
∆p
2
3
➔
Turn the lock nut 1/4 turn to the left only.
4
Q-
Q+
➔
Set flow rate
Q
.
5
➔
Tighten the lock nut. Do not alter the flow rate
setting!
6
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
3
4
➔
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 11 (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.