11 Inspection and maintenance
34
Installation and maintenance instructions ecoTEC plus 0020261188_00
Display
Test
programme
Action
T.06
Check external
pump
The external heating pump
(if present) is switched on
and off.
T.08
Checking the
burner
Product starts up and
switches to minimum load.
The flow temperature is
shown in the display.
▶
To terminate the function menu, select (
Cancel
).
11.2
Carrying out electronics self-tests
Menu
→
Installer level
→
Test programs
→
Electronics
self-test
The electronic self-test allows for pre-monitoring of the
PCBs.
11.3
Cleaning/checking the components
1.
Carry out the preparatory work before clean-
ing/checking any of the components. (
→
Page 34)
2.
Carry out the work required to finish the task after
cleaning/checking any of the components. (
→
Page 37)
11.3.1 Preparing the cleaning and inspection work
1.
Decommission the product.
2.
Disconnect the product from the power grid.
–
Take all necessary precautions to ensure that it
cannot be switched back on again.
3.
Remove the front casing. (
→
Page 9)
4.
Close the gas stopcock.
5.
Close the service valves in the heating flow and return.
6.
Close the service valve in the cold water pipe.
7.
Drain the product when you are carrying out work on
hydraulic components. (
→
Page 37)
8.
Ensure that water does not drip on live components
(e.g. the electronics box).
9.
Use only new seals.
11.3.2 Removing the compact thermal module
Danger!
Risk of death and risk of material damage
caused by hot flue gas.
The seal, heat insulation 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 heat insulation on the burner flange
or on the back panel of the heat ex-
changer shows signs of damage, replace
the heat insulation.
Note
The compact thermal module consists of five main
components:
–
Speed-regulated fan,
–
Gas valve assembly including support plate,
–
Venturi including mass flow sensor and gas
connection pipe,
–
Burner flange,
–
Premix burner.
4
3
2
1
1.
Disconnect the test system's silicone pipe for checking
the airflow rate
(1)
.
2.
Undo the fixing screw
(2)
and remove the air intake pipe
(3)
from the intake stub.
3.
Unscrew the union nut
(4)
from the gas valve assembly.
1
2
7
8
6
5
3
4
4.
Remove the plug for the earth cable
(5)
from the ignition
electrode.
5.
Remove the plug
(4)
from the ignition device.
