Cleaning The Condensate Ducts; Cleaning The Air Separation System; Cleaning The Filter; Cleaning The Air Separator - Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual

8.5

Cleaning the condensate ducts

2
1
Fig. 8.8 Dismounting the condensate siphon
• Completely remove the condensate siphon to clean
the condensate ducts by pulling out the clamp (1). This
allows access to the condensate discharge nozzle on
the heat exchanger.
• You can remove accumulations of dirt in the front of
the condensate discharge area via the lower cleaning
eye (2) on the heat exchanger.
• Refill the siphon with water.
8.6

Cleaning the air separation system

Danger!
H
Danger of burning or scalding!
All water-carrying components present a
danger of injury and scalding. Only carry out
work on these components if they have cooled
down.
1
2
3
Fig. 8.9 Cleaning the air separation system
Installation and maintenance instructions ecoTEC 0020029172_03
Inspection and maintenance 8
Fig. 8.10 Cleaning the filter
8.6.1

Cleaning the filter

You can clean or replace the filter (5) in the air
separator (2) without having to remove the air
separator.
• Unscrew the brass cover (4) of the steel casing (6).
• Pull the filter (5) upwards out of the air separator.
You can either clean the filter with hot water or replace
it with a new one.
• Insert the filter into the air separator.
• Screw the brass cover onto the air separator.

8.6.2 Cleaning the air separator

If the collector tray (on the inside of the casing next to
the filter) is heavily soiled, you can completely dismount
the air separator (2), clean it with hot water then
reinsert it.
• At first unfasten the 1.5" nut (3) on the lower outlet.
• Turn the casing on the axis of the upper connection.
• Only now unfasten the knurled nut (1) for the upper
inlet.
• Slide down the casing and pull the complete air
separator forwards out of the boiler.
• Dismount the filter as described in 8.6.1.
Now you can clean the air separator and filter with hot
water.
a Caution!
All O-rings must be replaced with new ones as
otherwise leaks may occur!
• To reinstall the air separator, carry out the steps
described above in reverse.
8.7 Checking the charge pressure of the external
expansion vessel
• Measure the charge pressure of the expansion vessel
at the testing nozzle of the vessel when the boiler is
depressurised.
4
5
6
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