Viessmann WB1A Series Installation And Service Instructions Manual page 50

Initial Start-up, Inspection and Maintenance
Steps
(continued)
S
Start-up and Maintenance
ervice
The Vitodens 100-W boiler is factory
preset for operation with natural gas. It
is recommended that a CO
performed at the boiler vent pipe
adaptor as part of the initial
start-up/maintenance procedure.
IMPORTANT
The cylinder burner of the Vitodens
100-W is preset. No adjustment or
readjustment of the burner is required.
Control range - high fire
Control range - low fire
50
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6. Relais tests
The CO value lies within the range of
2
H 6.6 to 10.0% for natural gas
check be The CO value measured must be
2 2
compared with the above CO
Note:
If step 7 above is not performed, the
process will end automatically after 30
minutes.
value.
2
blinking
F
psi
SERV
blinking
F
psi
SERV
If the CO value measured lies more
2
than 1% outside the stated range,
perform the following step:
H Check the venting system for leaks
(refer to the Vitodens Venting
System Installation Instructions).
1. To bring the boiler to a high fire
position, from a 12:00 o'clock
position quickly (in less than 2
seconds) turn selector dial "
clockwise to the end, then back
again into the high fire control range
(between 12:00 and 4:00 o'clock).
See top illustration on left. Turning
the selector dial "
tr"
clockwise between the 12:00 and
8:00 o'clock position will bring the
boiler to the low fire position. See
illustration on bottom left.
2. Check the CO content. Should the
2
actual value deviate by more than
1% from the above range, check the
seals in the balanced flue system.
3. Enter actual values into the service
report.
4. To bring the boiler to a low fire
position, from a 12:00 o'clock
position quickly (in less than 2
seconds) turn selector dial "
clockwise to the end, then back
again into the low fire control range
(between 12:00 and 8:00 o'clock).
See bottom illustration on left.
Turning the selector dial "
clockwise between the 12:00 and
4:00 o'clock position will bring the
boiler to the high fire position. See
illustration on top left.
5. Check the CO content. Should the
2
actual 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.
7. Once checked, turn the selector dial
" in less than 2 seconds
tr"
clockwise to the end and back again
into the control range.
tr"
counter
tr"
tr"