Checking The Co Content - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Further details regarding the individual steps
Checking the CO
During commissioning or maintenance,
the CO and CO have to be measured at
2
the boiler flue adaptor test point to check
the flue integrity. CO of up to 500 ppm
during start-up is acceptable.
We recommend measuring O
value is unmistakable regarding lambda
(air/gas). The O content fluctuates
2
between 7.5 % and 3.2 %.
A
r r
content
2
as the
2
Commissioning, inspection, maintenance
(cont.)
If flue installation is OK, change the gas
valve.
Note
Operate the appliance with uncontami-
nated combustion air to prevent operat-
ing faults and damage.
01. Connect a flue gas analyser at flue
gas port A on the boiler flue con-
nection.
02. Start the boiler and check for
leaks.
Danger
Escaping gas leads to a risk
of explosion.
Check all gas equipment for
tightness.
03. Turn rotary selector "tr" for less
than 2 s fully clockwise and then
back into its control range on the
right.
The display shows "SERV", "A"
and the boiler water temperature.
25