GB-7
D
GB
F
NL
I
E
4
Connect the PE wire for grounding to the gas
insert. Route the PE wire from the gas insert di-
rectly to the connection on the automatic burner
control unit.
WARNING
High-voltage risk! It is essential that a high-voltage
warning label be attached to the ignition/ioniza-
tion cable.
▷
For more detailed information on how to wire
the ignition/ionization cable, refer to the oper-
ating instructions and connection diagrams of
the automatic burner control unit and ignition
transformer.
▷
For further information about using a UV sensor,
refer to the relevant operating instructions.
Preparing commissioning
Safety instructions
▷
Agree settings and commissioning of the burner
with the system operator or manufacturer.
▷
Check the entire system, upstream devices and
electrical wiring/connections.
▷
Note the operating instructions for individual
controls.
DANGER
The burner must only be commissioned by author-
ized trained personnel.
Risk of explosion!
Please observe the appropriate
precautions when igniting the burner.
Risk of poisoning!
Open 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! A flue gas analysis
is to be conducted.
CAUTION
▷
Pre-purge the furnace chamber or radiant tube
with air (5 x volume) before every ignition at-
tempt.
▷
If the burner does not ignite although the auto-
matic burner control unit has been switched on
and off several times: check the entire system.
DANGER
Risk of explosion! Fill the gas line to the burner
carefully and correctly with gas and vent it safely
into the open air – do not discharge the test volume
into the furnace chamber.
Determining the gas and combustion air flow
rates
Q
gas
= P
B
/H
i
Q
air
= Q
gas
.
λ
. L
min
▷
Q
gas
: Gas flow rate in m
3
/h (ft
3
/h)
▷
P
B
: Burner capacity in kW (BTU/h)
▷
H
i
: Gas heating value in kWh/m
3
(BTU/ft
3
)
▷
Q
air
: Air flow rate in m
3
(n)/h (SCFH)
▷
λ
: Lambda, air index
▷
L
min
: Minimum air requirement in m
3
(n)/m
3
(n)
(SCF/SCF)
▷
Information on the gas quality supplied can be
obtained from the competent gas supply com-
pany.
Common gas qualities
Gas type
Heating value
L
min
m
3
(n)/m
3
(n)
(SCF/SCF)
H
i
kWh/m
3
(n)
H
s
(BTU/SCF)
Natural
gas H
11
1114
10.6
Natural
gas L
8.9
901
8.6
Propane
25.9
2568
24.4
Town gas
4.09
425
3.67
Butane
34.4
3406
32.3
▷
Data in kWh/m
3
(n) refer to the lower heating
value H
i
and data in BTU/SCF refer to the higher
heating value H
s
(gross calorific value).
▷
A minimum air excess of 20% (lambda = 1.2)
should be set in a cold furnace for initial adjust-
ment since the air volume falls as the tempera-
ture rises.
▷
Fine adjustment should be carried out at max.
furnace temperature and at as high a capacity
demand as possible.
Notes on the flow rate curve
▷
If the gas density in the operating state differs
from that reflected in the flow rate curve, convert
the pressures according to the local operating
state.
p
B
= p
M
.
δ
B
δ
M
▷
δ
M
: Gas density reflected in the flow rate curve
[kg/m
3
(lb/ft
3
)]
▷
δ
B
: Gas density in operating state [kg/m
3
(lb/ft
3
)]
▷
p
M
: Gas pressure reflected in the flow rate curve
▷
p
B
: Gas pressure in operating state
