Checking And Setting The Gas/Air Ratio - DeDietrich C 340 Series Installation And User Manual

Code Displayed text
GP008 Fan RPM Min
GP009 Fan RPM Start
Fig.69 Insert the probe for the flue gas
analyser
2 1
Fig.70 Full load test
11:20 ... ...... .... ...... ....
.....
i
..... ... ....... .... .. ..... ....... .... ..... .......
....... .... ....... .... .......
..... ... ....... .... .. ..... ....
.....
....... .... .. ..... ....
....... ...........
..... ... ....... ....
..... ... ....... ....
7762666 - v.02 - 29092020
Description
Minimum fan speed during Central
Heating + Domestic Hot Water
mode
Fan speed at appliance start
7.2.3
For boiler C 640, apply the instructions to each boiler module. Make sure
that the other boiler module is out of operation during this check and/or
setting.
The flue gas analyser must have a minimum accuracy of ±0.25% O
AD-3001424-01
A
.........
.......
...
......
.....
B
AD-3000941-03
560
1900
2500
2. Check the setting of the gas/air ratio.

Checking and setting the gas/air ratio

1. Unscrew the cap from the flue gas measuring point.
2. Insert the probe for the flue gas analyser into the measurement
opening.
Warning
Fully seal the opening around the sensor during measurement.
3. Measure the percentage of O
at full load and at part load.
Performing the full load test
1. Select the tile [ ].
The Change load test mode menu appears.
2. Select the test Medium power.
A Change load test mode
B Medium power
The full load test starts. The selected load test mode is shown in the
menu and the icon
3. Check the load test settings and adjust if necessary.
Only the parameters shown in bold can be changed.
Checking/setting values for O
1. Set the boiler to full load.
2. Measure the percentage of O
3. Compare the measured value with the checking values in the table.
Tab.52 Checking/setting values for O
Values at full load for G20 (H gas)
C 340 280
C 340 350
C 340 430
C 340 500
C 340 570
C 340 650
C 640 560
700 860 1000
1850 1300 1250
2500 1300 1400
in the flue gases. Take measurements
2
appears in the top right of the screen.
at full load
2
in the flue gases.
2
at full load for G20 (H gas)
2
C 340 / C 640
7 Commissioning
1140 1300
1400 1350
1500 1600
.
2
O (%)
(1)
2
4.3 – 4.8
(1)
4.3 – 4.8
(1)
4.3 – 4.8
(1)
4.3 – 4.8
(1)
4.3 – 4.8
(1)
4.3 – 4.8
(1)
4.3 – 4.8
(1)
61