Viessmann Vitodens 100-W WB1B Series Installation And Service Instructions Manual page 63

Vitodens 100-W, WB1B Installation & Service
Steps
(continued)
Start-up and Maintenance
Note: During the relay test (if required) the selector dial
"tr" position can limit the boiler input according to
the following table;
Dial setting Input setting
1 & below low fire
between 1 & 6 between low & high fire
6 & above high fire
2. Check the flue gas CO
2
deviate by more than 1% from the range shown in the
table, check the seals in the balanced flue system.
Adjust if necessary.
3. Enter actual values into the service report.
4. Bring the boiler to a low-fire test position by turning
the selector dial "tr" clockwise all the way to "U Reset"
and then back again into the low-fire test control range
(in less than 2 seconds). If the selector dial is in the
Start-up and Maintenance
high-fire position, turn the dial to the low-fire postion.
The display shows "SERV", the boiler water temperature,
one bar "<" for low-fire test, burner in operation "A"
and "r" pump operation.
Control range - low-fire
Note: Once in a low / high-fire test range, you can switch
back and forth between the high and low by simply
positioning the control range for the required test.
Note: The heat generated by the boiler during the
high-low-fire relay test must be removed. The
heating load must be imposed on the boiler (DHW
or heating) during the duration of the test. Boiler
temperature is automatically adjusted to a maximum
of 178º F (81º C).
5. Check the flue gas CO
value deviate by more than 1% from the above
range, check the seals in the balanced flue system.
6. Enter actual values into the service report.
Display flashing
<
<
<
<
<
<
<
<
<
content. Should the actual value
content. Should the actual
2
Start-up, Inspection and Maintenance
6. Relay tests (burner tests) (continued)
IMPORTANT
Steady state conditions must be established before
measuring flue gases.
7. Check the CO content for high- and low-fire again.
2
If the CO content is still not within the given range
2
(refer page 62), adjust the CO
content. See CO
8. Adjusting the CO
2
9. Adjust the high-fire (natural gas or liquid propane gas).
With the adjusting screw B, using a hex head
wrench (4 mm), adjust the high-fire CO
9% for NG or 10.8% for LPG. Clockwise rotation
decreases gas flow and counter-clockwise rotation
increases gas flow.
High-fire increase gas flow
Low-fire increase gas flow
10. Adjust the low-fire (natural gas or liquid propane gas).
Remove cover C from the gas valve. With the
adjusting screw under the cover and using a T40
size Torx head wrench, set the low-fire CO
to 8.7% for NG or 10.5% for LPG. Clockwise
rotation increases gas flow and counter-clockwise
rotation decreases gas flow.
11. Reinstall cover C.
12. Shut the boiler down, remove flue gas analyzer and
close flue gas measurement port A.
13. Return selector dial "
positions.
14. To cancel the relay test, switch the boiler OFF then
back ON. If not cancelled, the relay test is automatically
deactivated after 30 minutes.
content.
2
table on page 62.
2
content to
2
content
2
" and "tr" to the original
63