F Inspection And Maintenance Work - Overview - Vaillant ecoFIT pure 825 Installation And Maintenance Instructions Manual

Appendix
Inspection and maintenance work – Overview
F
The table below lists the manufacturer requirements with respect to minimum inspection and maintenance intervals. If na-
tional regulations and directives require shorter inspection and maintenance intervals, you should observe these instead of
the intervals listed in the table.
No. Work
Check the air/flue pipe for leak-tightness and to ensure that it is fastened correctly. Make sure
1 that it is not blocked or damaged and has been installed in accordance with the relevant Installa-
tion Manual.
Check the general condition of the product. Remove dirt from the product and from the vacuum
2
chamber.
Visually inspect the general condition of the heat exchanger. In doing so, pay particular attention
3 to signs of corrosion, rust and other defects. If you notice any damage, carry out maintenance
work.
Check the gas connection pressure at maximum heat input. If the gas connection pressure is not
4
within the correct range, carry out maintenance work.
Check the CO₂ content (the air ratio) of the product and, if necessary, adjust it. Keep a record of
5
this.
Disconnect the product from the power mains. Check that the electrical plug connections and
6
other connections are seated correctly and correct these if necessary.
Close the gas isolator cock and the service valves.
7
Drain the product on the water side. Check the admission pressure of the expansion vessel and
8
top the vessel up if necessary (approx. 0.03 MPa/0.3 bar below the system filling pressure).
Remove the gas-air mixture unit.
9
Check the seals in the combustion area. If you see any damage, replace the seals. Replace both
10
burner seals each time it is opened and accordingly each time maintenance work is carried out.
11 Clean the heat exchanger.
Check the burner for damage and replace it if necessary.
12
Check the condensate siphon in the product, clean and fill if necessary.
13
Install the gas-air mixture unit. Caution: Replace the seals.
14
If the volume of water is insufficient or the outlet temperature is not reached, replace the second-
15
ary heat exchanger if necessary.
Clean the filter in the cold water inlet. Replace the filter if impurities can no longer be removed
16 or if the filter is damaged. In this case, also check the impeller sensor for dirt and damage, clean
the sensor (do not use compressed air for this) and replace the sensor if it is damaged.
Open the gas isolator cock, reconnect the product to the power mains and switch the product on.
17
Open the service valves, fill up the product/heating installation to 0.05-0.3 MPa/0.5-3.0 bar (de-
18
pending on the static height of the heating installation) and start purging programme P.XX.
Perform a test operation of the product and heating installation, including hot water generation,
19
and purge the system once more if necessary.
Visually inspect the ignition and burner behaviour.
20
21 Check the CO₂ content (the air ratio) of the product again.
22 Check the product for gas, flue gas, hot water and condensate leaks, and repair if necessary.
Record the inspection/maintenance work carried out.
23
*Note: For those appliances which are not part of an annual service agreement/policy, maintenance must be carried out at least every
5 years.
38
Installation and maintenance instructions ecoFIT pure 0020230531_01
Mainten-
ance
Inspection
(must be
(annual) carried out
at regular
intervals)*
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