GB-8
D
GB
F
NL
I
E
G
G
1
2
Loosen the
screw 2 turns.
Integrated ignition lance on the ZIO..L:
▷
Air pressure test nipple
l
, external dia. = 9 mm
(0.35").
▷
Gas pressure test nipple
g
, external dia. = 9 mm
(0.35").
g
l
1
2
g
l
Loosen the
screws 2
turns.
▷
Ignition lance:
p
gas
= 30 – 50 mbar,
p
air
= 30 – 50 mbar.
▷
Check flame stability and ionization current.
▷
The gas and air pressure of the ignition lance
must be higher than the gas and air pressure of
the main burner.
Commissioning
Igniting and adjusting the burner
WARNING
Ensure adequate ventilation of the furnace chamber
before each burner start!
▷
The burner housing will become hot during op-
eration with preheated combustion air. Provide
protection against accidental contact as required.
•
All valves of the installation must be checked for
tightness before ignition.
Setting the low-fire rate:
•
Set the valves to ignition position.
•
Limit the maximum gas volume.
▷
Should an adjustable gas restrictor be installed
upstream of the burner, open the restrictor by
approx. a quarter.
•
Open the gas supply.
•
Ignite the burner.
▷
The safety time of the automatic burner control
unit starts to elapse.
•
If no flame forms, check and adjust the gas and
air pressures of the start gas adjustment.
•
In the case of operation with bypass (e.g. when
using an air/gas ratio control): check the bypass
nozzle and adjust if required.
•
In the case of operation without bypass (e.g.
when using an air/gas ratio control without by-
pass):
increase the low-fire rate setting.
•
Check the basic setting or bypass of the air con-
trol valve.
•
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.
•
