I 6. Relay Tests - Viessmann VITODENS 100-W WB1B Series Installation And Service Instructions Manual

Initial Start-up, Inspection and Maintenance
Steps
(continued)
Start-up and Maintenance
Fig. 50
Legend
A Flue gas measuring port
Fig. 51
Legend
A Heating mode pump output on
B Heating mode
C Boiler water temperature in °F or
fault code
D Water temperature unit in °F
E Service mode
F Current burner firing rate
G Burner in operation
H Fault
Control range - high-fire
Fig. 52
50
6. Relay tests
The Vitodens 100-W boiler is factory
preset for operation with natural gas.
It is recommended that a CO
be performed at the boiler vent pipe
adaptor as part of the initial start-up/
maintenance procedure.
For high altitude operation (above
5,000 ft / 1,500 m), refer to page 52
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
g
10 to 12% for liquid propane gas.
The CO value measured must be
2
compared with the above CO
value.
CO
high-fire
7.5-10.5%
NG range
Target value
9.0%
10.0-12.0%
LPG range
Target value
10.8%
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.
Note:
If step 14 is not performed, the
process will end automatically after
30 minutes.
Control range - low-fire
If the CO
2
than 1% outside the stated range,
perform the following step:
check
2
Check the venting system for leaks
g
(refer to the Vitodens Venting
System Installation Instructions).
1. Bring the boiler to a high-fire test
position by turning the selector
dial "tr" clockwise all the way
to "UReset" and then back again
into the high-fire control range
(in less than 2 seconds) as shown
in Fig. 52. The display shows
"SERV", the boiler water
temperature, five bars "
2
high-fire test, burner in operation
"A" and "r" pump operation
(Fig. 51).
2
2. Check the flue gas CO
low-fire
Should the actual value deviate
7.5-10.5%
by more than 1% from the range
shown in the table, check the seals
8.7%
in the balanced flue system. Adjust
10.0-12.0%
if necessary (see page 51).
10.5%
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 "UReset" and then back again
into the low-fire test control range
(in less than 2 seconds), as shown
in Fig. 50.
The display shows "SERV", the
boiler water temperature, one
bar "<" for low-fire test, burner
in operation "A" and "r" pump
operation, as shown in Fig. 52.
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.
value measured lies more
<" for
<
<
<
<
content.
2