Maintenance; Overview Of The Maintenance Tasks; Functional Check Of Boiler Operation - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

7.1.3 Maintenance

Before commencing any servicing or maintenance work,
carry out an initial inspection of the system as follows:
• Inspect the flue, pipework and electrical connections
for indications of damage or deterioration.
• Inspect the air supply and ventilation arrangements of
the installation.
• Check the heating and water system, in particular the
condition of radiator valves, evidence of leakage from
the heating system and dripping hot water taps.

7.1.4 Overview of the maintenance tasks

No. Activity
Disconnect the device from the mains supply, close the gas supply and maintenance taps, depressurise the
1
device (observe the manometer)
2 Remove the compact thermal module
3 Clean primary heat exchanger
4 Check whether the burner is dirty
5 Refit compact thermal module, replace burner seal. (Spare part number 981 046)
Check whether the electrical plug connections and other connections are fitted tightly and make adjust-
6
ments, if necessary.
7 Check/re-pressurise expansion vessel as necessary.
Open the maintenance taps, fill up the appliance/system up to approx. 1.0 - 2.0 bar (depending on the static
8
height of the system)
9 Check appliance generally, check for dust on the applianceand remove in the low-pressure chamber
10 Check and clean condensate trap and connection pipes
11 Clean the condensation waterways in the device
12 Open the gas supply and switch on the device
Perform a test operation of the appliance and heating system, including water heating and evacuate, if
13
necessary
14 Check ignition and burner flame picture
15 Check boiler for any leaks
16 Check the air/gas flue system
17 Check appliance gas setting, reset and record if necessary.
18 Complete benchmark logbook
Table 7.1 Maintenance steps

7.1.5 Functional check of boiler operation

• Carry out a functional check of the boiler operation as
previously detailed.
• Remove the appliance casing as detailed and operate
the boiler.
• Inspect the burner operation through the viewing win-
dow.
• Check that the flames are evenly covering the surface
of the burner.
• Inspect for signs of excessive flame lift or sooting.
Instructions for installation and servicing ecoTEC
Inspection and maintenance 7
carry out for:
inspection service
X
X
X
X
X
X X
X
X
X X
X X
X
X X
X X
X X
X X
X X
X
X X
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