Air/Gas Ratio Control - Honeywell Ecomax Series Technical Information

Application

1 .4 .2 Air/gas ratio control

If the system does not include flow rate control, tem-
perature-dependent pressure losses in the burner are
not compensated for. The air index lambda drops with
increasing furnace temperature (increasing air preheat-
ing). Therefore, in a cold furnace, an increased lambda
value is to be set to ensure sufficient excess air, even
when the furnace temperature is at its maximum. A fur-
nace at 1100°C with λ = 1.1 (approx. 2% O
burner setting of approx. 4% O
furnace is cold.
VAS..N
AKT
BCU
BZA
BVHM + MB7..L
ECOMAX · Edition 10.17
) requires a
2
, for example, when the
2
Prozess-Steuerung/
Process Control (PCC)
VAG
VMV
ECOMAX
7