Removing/Attaching The Front Casing; Installation 5; D Danger; A Caution - Vaillant ecoTEC VU 656/4 Installation And Maintenance Instructions Manual

4.8

Removing/attaching the front casing

2
1
Fig. 4.5 Removing the boiler casing
To dismount the front casing of the boiler, proceed as
follows:
• Unfasten the screw (1) on the bottom of the boiler.
• Push in both retaining clips (2) on the bottom of the
boiler so that the front casing is released.
• Pull the casing forwards by its bottom edge and lift
the casing up and off.
To mount the front casing of the boiler, please proceed
as follows:
• Place the casing on the upper boiler ensuring that the
casing and boiler lips engage.
• Push the casing onto the boiler so that the retaining
clips (2) on the casing click into place.
• Fix the casing by tightening the screw (1) on the
bottom of the boiler.
Installation and maintenance instructions ecoTEC 0020029173_01
5 Installation
d Danger!
Danger of injury to persons and/or material
damage due to improper installation!
The Vaillant ecoTEC boiler may only be
installed by a recognised skilled trade company.
who also assumes the responsibility for proper
installing and initial start-up of the boiler.
Take particular care to fit the siphon cartridge during
installation.
a Caution!
The ecoTEC VU 656 must be used with a
suitably sized low loss header.
1
2
Fig. 5.1 Appliance circuit and heating circuit/cylinder charging
circuit
Legend:
1 Boiler with pump
2 Low loss header
3 Consumer (e.g. heating circuit)
4 Cylinder
h Note!
We strongly recommend the installation of a
suitably sized quality dirt separator in the
return pipe work to the low loss header (not to
the boiler!) particularly in the case of old
systems. This will help to prevent any system
water contamination from entering and blocking
the boiler and producing an additional high
pressure loss.
Assembly 4

Installation 5

3 4
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