Maintenance; Overview Of The Inspection And Maintenance; Tasks - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

Always perform the following steps after completing
any inspection tasks:
• Open the service valves in the heating flow and return
and in the cold water inlet (combination boilers only).
• If necessary, refill the device with cold water up to a
pressure of approx 1.5 bar and bleed air from the
entire heating system.
• Open the service valve of the gas supply pipe.
• Turn on the power supply and the main switch.
• Check the appliance for gas and water leaks.
• Fill and bleed air from the heating system again, if
necessary.
Note
If it is necessary to keep the main switch on for
certain inspection and maintenance, this is indi-
cated in the description of the maintenance task.
7.1.3 Overview of the inspection and maintenance tasks
No. Activity
1 Check the air / gas flue system and ensure it is not blocked, damaged and is fitted correctly.
Measure the gas rate during operation (see table 5.1 inside the chapter commissioning part I).
2 If the gas rate is lower than the minimum gas rate follow the maintenance instructions (column
2).
Check combustion by measuring CO and CO
is outside the tolerances follow the maintenance instructions (column 2). If a flue gas analyser
3
is not available check the ignition and burner flame picture through the sight glass, if incom-
plete combustion is evident perform the maintanance instructions (column 2).
4 Isolate the appliance from the electrical mains supply, close the gas and water service valves.
Visually inspect the general heat exchanger area for signs of corrosion, sooting or other forms
5
of damage. If damage is evident perform the tasks in the maintenance column 2.
Remove the burner module (as described in section 7.2.1) if maintenance schedule is required
from steps 2, 3 or 5 above. Clean the primary heat exchanger. Fit a new burner door seal kit
6
(observe the assembly instructions enclosed with the seal kit). Refit the burner module and
tighten the nuts.
7 Check all the appliances electrical connections and make adjustments if necessary.
8 Check / re-pressurise the expansion vessel as necessary.
9 Check the appliance generally, check for dirt / dust and clean if necessary.
10 Check and clean the condensate trap and flexible condensate hose.
11 Open the gas and water service valves, re-establish the electrical supply and turn on the boiler.
Perform a test operation of the appliance including the heating and hot water systems and
12
bleed the system if necessary.
Re-pressurise the appliance / system up to between 1.0 - 2.0 bar (depending on the static height
13
of the system).
Measure the gas rate during operation and ensure it is within the tolerances specified (see
14
table 5.1 inside the chapter commissioning part I).
Re-check the combustion by measuring the CO and CO
15 that the measurement is within the tolerances. If a flue gas analyser is not available check the
ignition and burner flame picture visually through the sight glass.
16 Check the boiler for leaks of any kind, rectify as necessary.
17 Complete the gas commissioning checklist (Benchmark).
Table 7.1 Inspection and maintenance steps
Instructions for installation and servicing ecoTEC / 839592_09
Note
The boiler is fitted with a combustion analysis
test point. A suitable combustion analyser can
be connected to this point to establish the
combustion performance of the boiler. Checking/
adjustment of this value is required in the fol-
lowing instances; replacement of gas valve, con-
version to or from Natural Gas/ LPG or if incor-
rect combustion is suspected (see section 9.7).

7.1.2 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.
values, compare to table 9.2. If the measurement
2
values, (compare to table 9.2). Ensure
2
Inspection and maintenance 7
Column 1
Inspection must
be carried out
once a year
Column 2
Maintenance
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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