94
5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Service
Measuring CO
2
Content
(continued)
1.
Press button
D
until the service indicator has
dropped down to “0” (lower heating output).
2.
Measure CO
2
content at the flue gas pipe.
Measuring CO
2
at lower heating output
3. If the CO
2
content must be changed:
Unscrew cover cap
B
. Turn adjustment screw
A
in
small increments (Torx 40) until CO
2
content is at the
indicated level:
Turning clockwise
→
CO
2
content increases,
Turning counter-clockwise
→
CO
2
content decreases.
4. Record measurement reading in record (on page 222).
Check measurement readings again.
Start up the upper and lower heating output via the
burner control unit. If the values do not correspond
with the permissible CO
2
contents as per the tables,
the steps for the upper and lower heating output must
be
repeated.
5. Press buttons S
E
and
D
simultaneously for longer
than 2 sec. Burner changes to operating mode.
CO
2
content in partial load must always be at least 0.6%
lower than in full load.
IMPORTANT
Boiler models
Burner models
Permissable CO
2
content
Natural Gas
Liquid Propane Gas
2.5 and 3.0
1.25 MMBTU
8.3 +0.1/-0.2%
10.3 +0.0/- .2%
1.5 MMBTU
8.3 +0.1/-0.2%
10.3 +0.0/- .2%
3.5 to 6.0
1.5 MMBTU
8.3 +0.1/-0.2%
10.3 +0.0/- .2%
2.0 MMBTU
8.3 +0.1/-0.2%
9.9 +0.0/- .2%
