Inspection and maintenance
50
Installation and maintenance instructions ecoTEC pro 0020129672_03
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
¬ section 10.5
.
12.2.2 Draining the boiler
>
Close the service valves of the boiler.
>
Start test program P.06 (diverter valve mid-position)
(
¬ section 10.5
).
>
Open the drain valves on the service valves.
>
Make sure that the cap of the automatic air vent on the
internal 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)
(
¬ section 10.5
).
>
Make sure that the service valves on the boiler and the
cap of the automatic air vent on the internal pump is
open.
>
Open the drain cock.
>
Open the purging valves on the radiators.
Start from the highest radiator and then work from the
top to the bottom.
>
Once the water has drained off, close the purging valves
of the radiators and the drain cock.
12.3
Carrying out maintenance work
12.3.1 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/air mixture fitting
3.
Gas supply (mixture pipe) to the premix burner
4.
Burner door
5.
Premix burner
>
Switch off the boiler using the on/off switch.
>
Close the gas isolator cock on the boiler.
>
Close the service valves on the boiler.
>
Remove the front casing from the boiler (
¬ section 4.7
).
>
Fold the electronics box forwards (
¬ section 8.2
).
1
2
3
4
12.3 Remove the air intake pipe
>
Unscrew the retaining screw (
2, ¬ fig. 12.3
) and detach
the air intake pipe (
1, ¬ fig. 12.3
) from the intake stub.
>
Unscrew either the cap nut (
3, ¬ fig. 12.3
) from the gas
valve or the cap nut (
4, ¬ fig. 12.3
) between the gas
pipes.
>
Secure the gas pipe against twisting by holding the pipe
against the spanner flat when undoing the cap nut.
