Inspection And Maintenance; Complete Service Interval Record Section; Using Original Seals; Preparing The Maintenance Work - Vaillant ecoTEC plus VU 6/5-5 Series Installation And Maintenance Instructions Manual

12 Inspection and maintenance

12.1

Complete Service Interval Record section

▶
After servicing, complete the relevant Service Interval
Record section of the Benchmark Checklist located on
the inside back pages of this document.
12.2

Using original seals

If you replace components, use only the enclosed original
seals; additional sealing materials are not required.
12.3 Inspection and maintenance
▶
You must carry out an annual inspection of the product.
The annual inspection can be effectively performed
without removing components by requesting data from
the DIA system, carrying out the simple visual checks in-
dicated in the table in the appendix and performing a flue
gas measurement. The maintenance intervals and their
scope are determined by the heating engineer based on
the condition of the boiler found during the inspection. All
inspection and maintenance work should be performed in
the order specified in the table in the appendix.
During any inspection and maintenance or after change
of parts of the combustion circuit, the following must be
checked:
–
The boiler has been installed in accordance with the rel-
evant installation instructions.
–
The integrity of the flue gas installation and flue seals is
in accordance with the relevant flue installation instruc-
tions enclosed.
–
Visual, the integrity of the boiler combustion circuit and
relevant seals (paying particular attention to the burner
door seal).
–
The gas inlet working pressure at maximum rate.
–
The gas flow rates.
–
Correctness of electrical, water and gas connections.
–
Correctness of the water pressure.
–
The condition of the whole system, in particular the con-
dition of radiator valves, evidence of leakage from the
heating system and dripping taps.
▶
Correct any faults before proceeding.
12.4

Preparing the maintenance work

1. Switch off the product.
2. Disconnect the product from the power grid.
3. Remove the front casing. (→ Page 23)
4. Close the gas stopcock.
5. Close the service valves in the heating flow and in the
heating return.
6. Close the service valve in the cold water pipe.
7. Drain the product to clean hydraulic components
(→ Page 44).
8. Ensure that water does not drip on live components
(e.g. the electronics box).
9. Use only new seals and o'ring. Do not use additional
compounds.
42
12.5

Function menu

Menu → Installer level → Test programs → Function menu
The function menu allows you to actuate and test individual
components in the heating installation.
Function menu – Overview (→ Page 63)
12.6

Electronics self-test

Menu → Installer level → Test programs → Electronics
self-test
You can use the electronics self-test to check the PCB.
12.7

Checking the electrical plug connections

1. Use the main switch to switch off the product.
2. Disconnect the product from the power supply by
switching off the circuit breaker in the case of a fixed
connection.
Condition: Product disconnected from the power supply
▶
Check that the electrical plug connections and connec-
tions are working correctly and are connected correctly.
12.8

Removing the compact thermal module

Note
The compact thermal module consists of five main
components:
– Speed-regulated fan,
– Gas valve assembly including support plate,
– Venturi incl. mass flow sensor and gas connec-
tion pipe,
– Burner flange,
– Premix burner.
Danger!
Risk of death and risk of material damage
caused by hot flue gas.
The seal, insulating mat and self-locking nuts
on the burner flange must not be damaged.
Otherwise, hot flue gases may escape and
cause personal injury and material damage.
▶
Replace the seal each time you open the
burner flange.
▶
Replace the self-locking nuts on the
burner flange each time you open the
burner flange.
▶
If the insulating mat on the burner flange
or on the back wall of the heat exchanger
shows signs of damage, replace the insu-
lating mat.
1. Switch off the product using the on/off button.
2. Close the gas stopcock.
3. Remove the front casing. (→ Page 23)
4. Hinge the electronics box forwards.
Installation and maintenance instructions 0020244997_07