Inspection and maintenance
62 Installation and maintenance instructions ecoTEC plus 0020116700_01
12
12.2.1 Filling the boiler and the heating
installation
A description of how to fill the boiler and the heating instal-
lation is provided in ¬section10.7.
12.2.2 Draining the boiler
> Close the service valves of the boiler.
> Start test program P.06 (diverter valve mid-position)
(¬section10.7).
> Open the drain valves on the service valves.
> Make sure that the cap of the automatic air vent on the
heating pump is open so that the boiler can be drained
fully.
12.2.3 Draining the entire heating installation
> Attach a hose to the draining device on the system.
> Bring the open end of the hose to an appropriate drain
point.
> Start test program P.06 (diverter valve mid-position)
(¬section10.7).
> Make sure that the service valves on the boiler and the
cap of the automatic air vent on the heating pump is
open.
> Open the drain cock.
> Open the purging valves of the radiators.
Start from the highest radiator and then work from top
to bottom.
> Once the water has drained off, close the purging valves
of the radiators and the drain cock.
12.3 Using the function menu
You can use the function menu to service the ecoTEC plus
as it allows you to actuate and test individual components
of the heating installation.
Menu ¬ Installer level ¬ Test programs ¬ Function menu
> Use the minus button
or the plus button
to go to the components of the heating
installation.
> Confirm your selection using the right selector button
("Select").
Cancelling the function test
> Press the left selector button ("Cancel") to
stop the function test.
You can test the operation of the heating installation com-
ponents listed below using the self tests in the function
menu.
Display Test programs Action
T.01 Check internal
pump
You can switch the internal pump on
and off.
T.02 Check 3-way
valve
You can move the diverter valve to
the heating position or to the hot
water position.
T.03 Check fan You can switch the fan on and off.
The fan runs at maximum speed.
T.04 Check cylinder
charge pump
You can switch the cylinder charging
pump on and off.
T.05 Check circulation
pump
You can switch the circulation pump
on and off.
T.06 Check external
pump
You can switch the external pump on
and off.
T.08 Check burner The boiler starts, carries out the nec-
essary self-test and switches to mini-
mum load.
The flow temperature is shown in the
display.
12.4 Self tests in the function menu
12.3.1 Carrying out electronics self-tests
Menu ¬ Installer level ¬ Test programs ¬ Electronics
self-test
In case service is required you should use the electronic
self-test to check the PCB in advance.
12.4 Carrying out maintenance work
12.4.1 Removing the compact thermal module
a
Danger!
Risk of being burned or scalded by hot
components!
There is danger of being burned or scalded
at the compact thermal module and at all
water-carrying components.
> Only carry out work on these compo-
nents if they have cooled down.
The compact thermal module consists of five main compo-
nents:
1. Speed-regulated fan
2. Gas valve including support plate
3. Venturi including mass flow sensor and gas supply
pipe
4. Burner door
5. Premix burner
> Switch off the boiler using the on/off switch.
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