Vaillant ecoTEC exclusive 843 Installation And Maintenance Instructions Manual page 50

Appendix
No. Work
Products with integrated domestic hot water generation only: Clean the strainer in the cold water
inlet. Replace the strainer if impurities can no longer be removed or if the strainer is damaged.
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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 stopcock, reconnect the product to the power grid and switch the product on.
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Open the service valves, fill up the product/heating installation to 0.1-0.2 MPa/1.0-2.0 bar (de-
19
pending on the static height of the heating installation) and start the purging programme P.00.
Perform a test operation of the product and heating installation, including domestic hot water
20
generation, and purge the system once more if necessary.
Check the gas type.
21
Visually inspect the ignition and burner behaviour.
22
23 Check the CO₂ content (the air ratio) of the product again.
Check the product for gas, flue gas, domestic hot water and condensate leaks, and eliminate if
24
necessary.
Record the inspection/maintenance work carried out.
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Installation and maintenance instructions ecoTEC exclusive 0020193968_03
Mainten-
ance
Inspection
(must be
(annual) carried out
at regular
intervals)
X
X X
X
X X
X
X X
X
X X
X X