Air Connection; Selecting Components; Air Pressure - Honeywell Ecomax Series Technical Information

Self-recuperative burner for gas
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Project planning information for indirect heating

7 .9 Air connection

7 .9 .1 Selecting components

For indirect heating, a quick opening air valve should
always be used to ensure a safe burner start. The fol-
lowing air valves or butterfly valves/solenoid actuators
are recommended:
No pneumatic air/gas
Burner
ratio control system
ECOMAX 0
ECOMAX 1
ECOMAX 2
ECOMAX 3
ECOMAX 4
ECOMAX 5
BVHM 65/MB 7..N
ECOMAX 0
...
ECOMAX 4
ECOMAX · Edition 10.17
Air/gas ratio control
VR 20..N
VR 20..N
VR 25..N
VR 25..N
VR 40..N
VR 40..N
VR 50..N
VR 50..N
VR 65..N
VR 65..N
BVHM 65/MB 7..N
ECOMAX 5

7 .9 .2 Air pressure

The required air pressure depends on the burner size,
the gas type and the system configuration.
Air pressure
upstream of burner
Air/gas ratio
approx. 50 – 60 mbar
control
No pneumatic
air/gas ratio
approx. 50 – 60 mbar
control system
To ensure accurate measurements of the pressure dif-
ferential on the integrated orifice, flow to the orifice
must not be disturbed. We recommend using the con-
nection set for air, which ensures correct measurement
at the measuring orifice, see page 53 (Connection set
for gas and air). The attachment of a coupling, a bellows
unit or a pipe bend directly upstream of the orifice can
cause turbulence in the gas flow resulting in the burner
being incorrectly adjusted.
Air supply line pressure
Natural gas
Natural gas H
L / LPG
80 mbar
100 mbar
80 mbar
80 mbar
58

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