27
Checking the CO
2
content
Preparing the test
A
B
C
D
E
F
1.
Open the gas shut-off valve.
2.
Start the burner with the emissions
test switch enabled at the control
unit.
3.
Simultaneously hold down
S
E
and
D
for longer than 2 s.
Display
C
will then show the follow-
ing:
■ Under Status: "P" (= controlled
stop)
■ Under Service: Modulation level in
% ("100" = 100 % = upper heating
output, "0" = 0 % = lower heating
output)
CO
2
test at the upper heating output
1.
Press
F
until the service display
has counted up to "100" (= 100 %).
2.
Check the CO
2
content at the flue
pipe.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5794 780 GB