Inspection And Maintenance Work Steps - Vaillant ecoTEC VU Installation And Maintenance Instructions Manual

12 Inspection and maintenance
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
1 blocked or damaged and is fitted correctly, complying with the relevant installation instruc-
tions.
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 (paying particular attention to the burner door seal). If
damage is evident proceed to column 2.
Measure the gas flow rate during operation with maximum load (¬ section 10.12). If the gas
4
flow rate complies to the ¬ table 10.4 continue with column 1, if not proceed to column 2.
Check the gas inlet working pressure (¬ section 10.10) operation with maximum load. If the
5 gas inlet working pressure complies to the ¬ table 10.2 continue with column 1, if not proceed
to column 2.
Check combustion by measuring CO, CO
6 tolerances of ¬ table 10.2 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.
10 Remove the compact thermal module.
Check the integrity of all combustion circuit seals, especially the burner door seal. Ensure any
11
damage found is repaired before proceeding.
12 Clean the heat exchanger (¬ section 12.3.2).
13 Check whether the burner is dirty and clean it if necessary.
Check the condensate trap in the boiler, clean and fill. Flush through all discharge pipe work
14
(ensure route and termination are correct and it is unlikely to freeze up in severe weather).
15 Install the compact thermal module. Caution: Use new seals and nuts!
For VUW boilers: Replace the hot water heat exchanger if the volume of water is insufficient
16
or the output temperature is not reached
For VUW boilers: Clean the filter in the cold water inlet. If the contamination can no longer be
removed or the filter is damaged, replace the filter. In this case, also check the impeller sen-
17
sor for dirt and damage, clean the sensor (do not use compressed air for this) and replace the
sensor if it is damaged.
18 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
19
boiler.
Open the service valves and fill up the boiler/appliance to approximately 0,1 - 0,2 MPa (1,0 -
20
2,0 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
21
and purge again if necessary.
22 Check visually the ignition and burner performance.
Check the boiler for leaks of any kind (gas, flue gas, water, condensate) and rectify as neces-
23
sary.
If you had problems with the CO, CO
24 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.
Complete the Benchmark gas boiler commission service record on the back pages of this
25
manual.
12.2 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.
54
and CO/CO . If the values are outside the
2 2
, CO/CO -values in Step 6 before the maintenance, check
2 2
Installation and maintenance instructions ecoTEC 0020173113_01
Column 1 Column 2
Inspection must Maintenance
be carried out must be car-
each year ried out at reg-
ular intervals
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