ECOMAX · Edition 10.17
61
Project planning information for indirect heating
Actuating the air valve for the burner (terminal 22) initi-
ates “normal” cooling; actuating a second air valve for
the additional cooling air connection initiates additional
cooling. The additional cooling air valve is actuated
separately by the process control system. For wiring on
site, we recommend using a BCU..C with a supplemen-
tary terminal strip (e.g. terminals 32/33 for additional
air valve).
In the case of “additional” cooling air, the combustion
air valve must be activated together with the cooling air
valve in order to prevent the recuperator from overheat-
ing.
7 .14 Build up of noise
In the case of fitted burners, the sound level of the sin-
gle burner which can be measured outside the furnace
is usually between 75 and 82 dB(A).
In a furnace system, the value which can be measured
depends on the capacity, excess air volume, flue gas
extraction and flue gas temperature of the single burn-
ers as well as the burner arrangement and ambient
influences.
7 .15 Emissions
CO and NO
X
values depend on the furnace tempera-
ture, air preheat temperature, burner type and burner
settings (NO
X
values on request).
If operated with LPG, NO
X
values are approx. 25%
higher.
600
700
800
900
1000
1100
1200
1300
0
100
200
300
400
500
600
ECOMAX..C
ECOMAX..M
Flue gas temperature at recuperator inlet [°C]
NO
x [mg/m
3
ref. 5 % O
2
]
NO
X
values in the diagram apply for natural gas
