Heating Mode; Required; A Caution - Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual

5 Installation
Model Article Connection
number
1
WH 40 306720 1 / " BSP (f)
4
WH 95 306721 2" BSP (f)
WH 160 306726 DN65
WH 280 306725 DN80
Table 5.2 Low loss headers dimensions
All dimensions in mm
* = distance between flanges
Fig. 5.1 Low loss header
14
Header Header
Sizes width depth
1 A B
115 115
155 155
520* 120
600* 160
Total Insulation To boiler
height dimensions
C
500 115/115 280
750 155/155 470
1350 220/220 900
1390 260/260 930
Safety devices
• The outlet of the expansion relief valve must be
suitably terminated in accordance with BS 6798 or
BS 6644.
• The boiler is suitable for connection to plastic
centralheating pipes. In this connection preferably
1.5 m copper pipes should be used prior to the
transition to the plastic pipes for the connection to
the boiler.
• Should a system be found to include non-oxygen
barrier pipe then it is essential that a plate heat
exchanger be installed in between the boiler and the
non-oxygen barrier pipe, thus preventing corrosion. It
is essential that the boiler and the system have
provision for water make up and expansion.
For more detailed information on examples of systems
and system equipment contact your Vaillant sales
support point.
a Caution!
The following system diagrams are schematic
representations. They cannot be regarded as a
substitute for professional planning! The
system diagrams do not include the isolator
and safety devices that are required to carry
out a professional installation. Observe the
applicable standards and guidelines.
The boiler can be installed in three different
configurations:
• heat only,
• cylinder only, and
• heating and cylinder.
5.1

Heating mode

In case of only one heating circuit to be operated
downstream of the low loss header, this one can directly
be controlled by the ecoTEC.
A suitable pump can be selected and installed
downstream of the low loss header. You can select a
pump that fits to your system (4 m or 6 m pump or
electronically controlled pump). In case of systems with
multiple circuits please pay additional attention to the
control system accessories.
Installation and maintenance instructions ecoTEC 0020029172_03
To heating Height from
circuit floor
D E F
340 n/a
540 n/a
900 300
930 300
Maximum
volume
3
flow m /hr
3.5
8
12
21.5