Inspection And Maintenance Work Steps - Vaillant ecoTEC VU 656/4 Installation And Maintenance Instructions Manual

8 Inspection and maintenance
8.1.5

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 6.3.2). If the gas flow
4
rate complies to the Table 6.1 continue with column 1, if not proceed to column 2.
Check the gas inlet working pressure (section 6.3.3) operation with maximum load. If the gas
5 inlet working pressure complies to the Table 6.2 continue with column 1, if not proceed to
column 2.
Check combustion by measuring CO, CO
6 tole rances of Table 8.1 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.
Dump 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. If there are
11
any damages repair them before proceeding.
12 Clean the heat exchanger.
13 Check whether the burner is dirty and clean it if necessary.
14 Check the condensate siphon in the boiler, clean and fill if necessary.
15 Check the condensate ducts in the boiler and clean if necessary.
16 Clean the air separation system.
17 Install the compact thermal module. Caution: Use new seals and nuts!
Open the service valves and fill up the boiler/appliance to approximately 1.0 - 2.0 bar
18
(depending on the static height of the system). Start the bleeding program P.0.
Open the gas isolation valve, reconnect the boiler with the power mains and switch on the
19
boiler.
Perform a test operation of the boiler and heating installation, including water heating and
20
bleed again if necessary.
21 Check visually the ignition and burner performance.
Check the boiler for leaks of any kind (gas, flue gas, water, condensate) and rectify as
22
necessary.
If you had problems with the CO, CO
23 them again now (see Table 8.1). If they are outside of the tolerances of Table 8.1 make an
adjustment, see section 8.1.4.
24 Complete the gas commission checklist (benchmark book).
Table 8.2 Inspection and maintenance steps
38
and CO/CO . If the values are outside the
2 2
, CO/CO -values in Step 6 before the maintenance, check
2 2
Column 1
Inspection must
be carried out
each year
Installation and maintenance instructions ecoTEC 0020029173_01
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