Cylinder Charging Mode; Required; H Note - Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual

Hydraulic schematic drawing:
Heating circuit connection using low loss header
1
Fig. 5.2 Heating circuit connection using low loss header
Legend:
1 Boiler with internal pump
2 Low loss header
3 External heating pump
4 Consumer (e.g. heating circuit)
8 9
L N 3 4 5
X14
X6
Fig. 5.3 Electrical connection for heating pump downstream of
the low loss header
The settings for the internal pump are made at the
factory. The pump output does not require adjustment.
Use the grey ProE plug to establish the electrical
connection with the external heating pump.
To assign the "external heating pump" function to the
plug (1) (additional relay) diagnosis point "d.26" in the
nd
2 diagnosis level must be set to the value "2", see
Chapter 9.1.2.
The low loss header ensures, in conjunction with the
boiler circulation pump, that a sufficiently high minimum
quantity of water is always circulating through the
boiler.
5.2

Cylinder charging mode

The electronics of the ecoTEC are designed in such a
way that one cylinder charging circuit and one heating
circuit can be connected directly without the need for
accessories.
Installation and maintenance instructions ecoTEC 0020029172_03
4
3
2
X18 X13
X11
The charging circuit connection downstream of the low
loss header enables the choice of an individual cylinder
size and of a charging pump.
h Note!
Observe that non-return valves or mixer
circuits may be required in order to eliminate
cross-flow to other circuits or the effects of
high temperatures from the charging circuit.
Hydraulic schematic drawing:
Cylinder priority switching via low loss header
1
1
Fig. 5.4 Cylinder priority switching via low loss header
Legend:
1 Boiler with internal pump
2 Low loss header
3 External heating pump
4 Consumer (e.g. charging circuit)
8 9 L N 3
X14
X6
Fig. 5.5 Electrical connection for cylinder charging pump
Use the mounted ProE plug (1) to establish the electrical
connection for the cylinder charging pump.
The pink plug-in location X6 (1) on the PCB is reserved
for the cylinder charging pump. It is not necessary to do
settings at any diagnosis point.
Installation 5
4
3
2
X18
X13
4 5
1
X11
15