Checking The Ionisation Current; Checking The Water Quality; Checking The Flue Gas Outlet/Air Supply Connections; Checking The Gas Filter - DeDietrich C 330 Series Installation, User And Service Manual

Fig.64 Filling/drain valve
Fig.65 Gas valve unit measuring points
P
3 2
2
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10.2.3
1. Check the ionisation current at full load and at low load.
2. Clean or replace the ionisation and ignition electrode if the value is
10.2.4
1. Fill a clean bottle with some water from the system/boiler from the
2. Check the quality of this water sample or have it checked.
1
2
AD-0000534-01
10.2.5
1. Check the flue gas outlet and air supply connections for condition and
10.2.6
The gas valve unit on the boiler is fitted with a gas filter as standard.
Check this for soiling.
1. Set the boiler to full load.
2. Measure the gas inlet pressure via the measuring point P1 on the gas
P1
3. Check the gas inlet pressure at measuring point 2 on the gas valve
4. Compare the measured values with the checking values in the table.
5. If the measured value is lower than the control value, clean or replace
AD-0000513-01
10.2.7
Combustion is checked by measuring the O
outlet duct.

Checking the ionisation current

The value is stable after 1 minute.
lower than 3 µA.

Checking the water quality

filling/drain valve.
Warning
More information regarding water quality requirements is available
in our Water quality instructions. This manual forms part of the set
of documents supplied with the boiler. Always adhere to the
instructions in the aforementioned document.

Checking the flue gas outlet/air supply connections

tightness.

Checking the gas filter

pipe.
This gas inlet pressure should be at least 17 mbar.
unit.
Tab.39 Minimum gas inlet pressure values at gas valve unit
measuring point 2
C 330 ECO
280
350
430
500
570
650
the gas filter.

Checking the combustion

10 Maintenance
Minimum value (mbar)
14
13
10
10
10
10
percentage in the flue gas
2
59