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Inspection and maintenance
10.10 Resetting the Maintenance type
Resetting the set Maintenance type starts the new maintenance interval.
▶ Open the menu Reset ( table 13, p. 31).
▶ Reset the parameter Service display.
10.11 Measuring the gas pressure
▶ Measure the gas working pressure ( § 8.5, p. 22).
▶ Make a note of the value in the maintenance protocol ( § 16.6, p.
49).
10.12 Measuring of CO and CO
▶ Measure the CO content and the CO
▶ Make a note of the values in the maintenance protocol ( § 16.6, p.
49).
10.13 Measuring the ionisation current
▶ Read off the ionisation current on the display ( § 8.8, p. 23).
▶ Make a note of the value in the maintenance protocol ( § 10.17, p.
38).
-or-
▶ If the value is less than 2 A: replace the ignition and flame sense
electrode ( § 10.16.2, p. 36).
10.14 Check the (flue) gas tightness
▶ Check the tightness of all gas-carrying components ( § 8.9, p.
23).
▶ Visually inspect the supply air and flue gas routing and check for
tightness and correct installation/brackets.
▶ Check whether the siphon is filled with water and fill if required ( §
10.7, p. 34).
10.15 Check for correct operation
▶ Check the tightness of all couplings.
▶ Check the operating pressure and top up if required.
In doing so, take the water quality into consideration ( § 5.3, p.
11).
▶ Check the settings of the boiler ( § 9.4, p. 25).
▶ Complete the inspection and maintenance protocol ( § 10.17, p.
38).
▶ Close the front panel.
10.16 Replacing components
10.16.1 Replacement interval for components
The following components must be replaced after expiry of the specified
service life.
Replace according to specification, depending on what occurs
first.
Service life
Component
[Year]
Gaskets and O-rings
Remove gaskets and always replace O-rings.
Ionisation and ignition
electrode
Burner gasket
Gasket of condensate
catch pan
1)
Flue gas check valve
Air/gas ratio control
10
valve
Gas hose
10
1) Use only with cascade system.
36
2
percentage ( § 8.6, p. 22).
2
Burner
Burner starts
runtime
[Hours]
[Number]
2
4000
25,000
2
4000
--
2
4000
--
2
4000
--
--
500,000
20,000
--
2) When replacing the air/gas ratio control valve it is advisable also to replace the
gas hose.
Table 19 Replacement interval for each component
▶ Document replacement of components in the maintenance
protocol( § 10.17, p. 38).
10.16.2 Replacement of the ionisation and ignition electrode
NOTICE
Damage to the appliance by applying an excessively high torque
when tightening the screws.
The screws of the ionisation and ignition electrode are installed in an
aluminium heat exchanger. Using a graphite seal ensures tightness when
tightening the screws hand-tight (using hand tools).
▶ Tighten the 4 screws of the ionisation and ignition electrode by hand
(3 Nm).
Observe the replacement period for the ionisation and ignition
electrode.
▶ Replace the ionisation and firing pin according to the service life (
Tab. 19, p. 36).
▶ Switch off the appliance.
▶ Undo the screws [1] of the ionisation and ignition electrode.
▶ Remove the ionisation and ignition electrode [2 + 3].
▶ Remove the plug of the ionisation and ignition electrode.
▶ Remove both gaskets [4].
1
3 Nm
1
Fig. 44 Replacement of the ionisation and ignition electrode
[1]
Screws
[2]
Ionisation electrode
[3]
Ignition electrode
[4]
Gasket
▶ Clean the contact surface on the heat exchanger.
▶ Fit the new gasket and the new ionisation and ignition electrode.
▶ Tighten the screws of the ionisation and ignition electrode (3 Nm).
▶ Install the plug of the ionisation and ignition electrode.
2)
▶ Start up the boiler.
▶ Check the flue gas tightness of the removed parts.
4
2
4
3
Condens 7000 WP – 6721842519 (2022/03)
0010040027-001
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