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5784 568 - 18
Vitodens 100-W, B1HA/B1KA 26 to 125 Combi Installation/Service
CO2
high-fire low-fire
NG range
Target value
7.5-10.5% 6.5-10%
9.1% 8.5%
LPG range
Target value
10.0-12.0% 9-11.5%
10.7% 10.0%
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.
A
Flue gas measuring port
For high altitude operation above 5,000 ft (1,500 m),
refer to page 49 first.
For conversion to propane, use the supplied conversion kit.
The CO
2
value lies within the range in the table;
Checking the CO
2
Content/Relay Tests
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
2
content the burner output can be
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;
5. Confirm your settings with OK.
The bars stop flashing.
4. Check the CO
2
content for the upper heating output
(100%).
5. Check the CO
2
content for the lower heating output
(20%).
6. Analyze CO2 content for low-fire. The CO2 content
must fall to a minimum of 0.4% under the value for
high-fire as shown in the ‘flue gas CO2 content’ table.
7. Should the actual CO2 value deviate from the values
shown in the ‘flue gas CO2 content’ table, check the
seals in the flue system. Correct any leaks.
Replace the gas valve if necessary.
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
.
Shown on the Display
Burner output
OFF
- 20
-- 40
--- 60
---- 80
----- 100
0%
20%
40%
60%
80%
100%
Start-up, Inspection and Maintenance
Note:
Operate the appliance with uncontaminated
combustion air to prevent operating faults and
damage.
The Vitodens 100-W is factory set for natural gas.
During commissioning or maintenance, the CO2, O2 and
CO content need to be measured at the boiler flue adaptor
test port.
The CO2 values should be within the ranges stated in
the table below therefore the O2 content should be
between 3.2% and 7.5% for both gas types
- the CO emissions shall not exceed 400 ppm within the
specified CO2 range
If the actual CO2, O2 or CO values deviate from the stat-
ed ranges, check the seals in the flue system for leaks.
If the flue installation is OK, contact Viessmann to deter-
mine whether adjustments can be made to the gas valve
or gas valve replacement is necessary.
