Secondary Air - Viessmann Vitoflex 300-UF Series Installation And Operating Instructions Manual

Vitoflex 300-UF Installation & Operating

Secondary Air

Parameter
"Secondary fan, full load"
"Secondary air fan, partial load"
"Current set value"
"Residual O "
2
"Residual O , partial load, offset" Sliding increase in the residual oxygen content at partial
2
"Current set value"
"Minimum output"
"Maximum output"
Description
Utilisation level of the secondary air fan at full load
Actual: Current utilisation level of the secondary air fan
Setting in %
Utilisation level of the secondary air fan at partial load
Setting in %
Displays the current set value for the secondary air fan
Sliding value between the set value for the secondary air fan at full load and
the set value at partial load
Set value for the residual oxygen content, control
variable for secondary air control
Setting in %
load
Full load: 0 % increase, minimum partial load:
Up to 4% increase
Setting in %
Displays the current set value for the residual oxygen content
Minimum value: residual O
Maximum value: residual O
(at partial load: maximum 4%)
Minimum heating output of the heating system in
automatic mode
Setting is a % of the system's inherent maximum
heating output
Maximum heating output of the heating system in
automatic mode
Setting is a % of the system's inherent maximum
heating output
"General" tab
The secondary air parameters are used to determine
the heating output.
The amount of secondary air regulates the oxygen
content in the flue gas. Secondary air is blown in
through the side openings in the combustion chamber
walls. If the set value for the amount of secondary air
is exceeded, the amount of fuel supplied is reduced.
setting (at full load)
2
setting and partial load offset
2
Parameter
Setting Standard
range value:
25 to 90 60
10 to 50 40
4 to 18 7
0 to 4 0
30 to 99 30
30 to 100 100
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