Vaillant ecoTEC VU User Manual

Inspection and maintenance
Installation and maintenance instructions ecoTEC 0020173113_01 55
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.

Vaillant ecoTEC VU Specifications

General

Brand	Vaillant
Model	ecoTEC VU
Category	Boiler
Language	English