Inspection And Maintenance Work Steps - Vaillant ecoTEC plus SERIES Installation And Maintenance Instructions Manual

12.2

Inspection and maintenance work steps

No. Activity
Check the air flue gas installation for leaks and for proper fixation and ensure it is not blocked
1
or damaged and is fitted correctly, complying with the relevant installation instructions.
2 Carry out a general inspection of the boiler for dirt and dust and clean as necessary.
Visually inspect the complete heat engine for its general condition and for signs of corrosion,
3
sooting or other forms of damage. If damage is evident proceed to column 2.
Measure the gas flow rate during operation with maximum load (¬ section 10.11.3). If the gas
4
flow rate complies to the ¬ table 10.2 continue with column 1, if not proceed to column 2.
Check the gas inlet working pressure (¬ section 10.11.4) operation with maximum load. If the
5 gas inlet working pressure complies to the ¬ table 10.3 continue with column 1, if not proceed
to column 2.
Check combustion by measuring CO, CO
6 tole rances of ¬ table 12 proceed to maintenance column 2. You must not proceed with the
maintenance if a new burner door seal kit is not available.
Isolate the boiler from the power mains. Check whether the electrical plug connections and
7
the other electrical connections are fitted tightly and correct them if necessary.
8 Close the gas isolation valve and the service valves.
Drain the pressure in the boiler on the water side (observe pressure gauge) and check the
9
charge pressure of the expansion vessel. Top up if necessary.
Only with VUW boilers with actoSTOR: Check the charge pressure in the expansion vessel of
10
the layered storage tank. Correct the pressure if necessary.
11 Remove the compact thermal module.
Check the integrity of all combustion circuit seals, especially the burner door seal. Ensure any
12
damage found is repaired before proceeding.
13 Clean the heat exchanger (¬ section 12.4.2).
14 Check whether the burner is dirty and clean it if necessary.
Check the condensate siphon in the boiler, clean and fill. Flush through all discharge pipe work
15
(ensure route and termination are correct and it is unlikely to freeze up in severe weather).
16 Install the compact thermal module. Caution: Use new seals and nuts!
For VUW boilers:
17 Replace the hot water heat exchanger if the volume of water is insufficient or the output tem-
perature is not reached
For VUW boilers:
18 Remove the impeller sensor, clean the filter in the cold water inlet of the sensor and refit the
sensor.
19 Service the domestic hot water cylinder (see note below).*
Open the gas isolation valve, reconnect the boiler with the power mains and switch on the
20
boiler.
Open the service valves and fill up the boiler/appliance to approximately 0,1 - 0,2 MPa (1,0 - 2,0
21
bar) (depending on the static height of the system). Start the purging program P.00.
Perform a test operation of the boiler and heating installation, including hot water generation
22
and purge again if necessary.
23 Perform the gas family check (¬ section 12.1.5).
24 Check visually the ignition and burner performance.
Check the boiler for leaks of any kind (gas, flue gas, water, condensate) and rectify as neces-
25
sary.
If you had problems with the CO, CO
26 them again now (¬ table 12.1). If they are outside of the tolerances of ¬ table 12.1 make an
adjustment, see ¬ section 12.1.4.
27 Complete the gas commission checklist (benchmark book).
12.3 Inspection and maintenance steps
* Additional checks and procedures will be required where the
boiler is used with a cylinder or solar thermal system. These are
not covered in this manual.
Installation and maintenance instructions ecoTEC plus 0020116700_01
and CO/CO . If the values are outside the
2 2
, CO/CO -values in Step 6 before the maintenance, check
2 2
Inspection and maintenance
Column 1
Inspection must
be carried out
each year
12
Column 2
Maintenance
must be carried
out at regular
intervals – but
no longer than
5 years
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 x
x x
x
x x
x
x x
x x
x
x x
61