Checking The Co Content/Relay Tests - Viessmann Vitodens 100-W B1HA 26Vitodens 100-W B1HA 35Vitodens 100-W B1KA 35 Installation And Service Instructions Manual

Start-up, Inspection and Maintenance
Checking the CO
The Vitodens 100-W is factory-set for natural gas. During
commissioning or maintenance, the CO
be measured at the boiler flue adaptor test port to check
the flue integrity. We recommend measuring O2, as the
value is unmistakable regarding lambda (air/gas). The O2
content fluctuates between 7.5 % and 3.2 %. The CO/
CO ratio has to be less than 0.004.
2
If the actual CO or O2 and CO values deviate from the
2
stated range, check the balanced flue system for
leaks. If flue installation is OK, change the gas valve.
Note: Operate the appliance with uncontaminated
combustion air to prevent operating faults and
damage.
Note: When the boiler is initially turned on, a self-
diagnostic check is initiated. Wait until the
temperature display is stabilized and the boiler's
actual temperature is displayed.
For high altitude operation above 5,000 ft (1,500 m),
refer to page 45 first.
For conversion to propane, see the separate instructions.
The CO value lies within the range of;
2
- 7.5 to 10.5% for natural gas and 10 to 12% for
liquid propane gas. The CO
be compared with the above CO
high-fire
NG range 7.5-10.5%
Target value 9.1%
LPG range 10.0-12.0%
Target value 10.7%
A Flue gas measuring port
44
Content/Relay Tests
2
and CO have to
2
value measured must
2
value.
2
CO 2
low-fire
6.5-10%
8.5%
9-11.5%
10.0%
Vitodens 100-W, B1HA series & B1KA Combi Installation/Service
1. Connect a flue gas analyzer at flue gas port A on
the boiler flue connection.
2. Start the boiler and check for leaks.
3. To check the CO
adjusted manually.
1. Tap MODE.
2. Press / until "SERV" is displayed.
3. OK to confirm.
OFF appears on the display. Test mode is then
not activated.
4. Use / to select the burner output;
Shown on the Display
-
--
---
----
-----
5. Confirm your settings with OK.
The bars stop flashing.
4. Check the CO
2
(100%).
5. Check the CO
2
(20%).
The CO content must be between 0.5% and 1.0%
2
below the value of the upper heating output.
6. If the CO content lies within the indicated range,

2
continue with point 8.
If the CO content lies outside the indicated range,

2
check the flue gas/ventilation air system for tightness;
remedy any leaks. Replace gas valve if required.
7. Re-check the CO
heating output.
8. Terminate test mode:
1. / until "SERV" flashes.
2. OK to confirm. The selected value flashes.
3. until OFF flashes.
4. OK to confirm.
When "SERV" disappears, test mode is terminated.
9. Shut down the boiler, remove the flue gas analyzer
and close flue gas measuring port A.
content the burner output can be
2
Burner output
OFF 0%
20 20%
40 40%
60 60%
80 80%
100 100%
content for the upper heating output
content for the lower heating output
content for the higher and lower
2