Heating Mode And Cylinder Charging Mode - Vaillant ecotec plus Installation And Maintenance Instructions Manual

5 Installation
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.
5.3

Heating mode and cylinder charging mode

Note!
h
Also observe Chapters 5.1 and 5.2 of this
manual.
The combination of heating mode and cylinder charging
mode of the boiler can not be equated with either
heating mode or cylinder charging mode.
Other hydraulic relationships must be taken into account
in order to ensure faultless operation.
The boiler is uncoupled from the consumer circuits by
the low loss header. This means that the circuits
downstream of the low loss header can be designed
according to individual requirements (pump dimension,
cylinder position).
Hydraulic schematic drawing:
Cylinder priority switching and heating circuit via low
loss header
1
3
2
Fig. 5.6 Cylinder priority switching and heating circuit via low
loss header
Legend:
1 Boiler with internal pump
2 Low loss header
3 External heating pump
4 Consumer (e.g. heating circuit)
5 External cylinder charging pump
6 Cylinder
16
6
4
5
One direct heating circuit and one hot water cylinder
(including charging pump and non-return valve) can be
connected downstream of the low loss header to the
ecoTEC boiler without additional equipment. If additional
heating circuits are required this can be achieved with
the use of optional controllers and hydraulic accessories
(e.g. VRC630). The available pump head from the boiler
circulation pump is sufficient to pump water around the
boiler circuit between the boiler and low loss header. All
heating circuits and hot water cylinder configurations
can be connected downstream of the low loss header.
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.
8 9 L N 3 4 5
X14
1
X6
Fig. 5.7 Electrical connection for cylinder charging pump and
external heating pump
Legend:
1 Plug-in location for cylinder charging pump
2 Plug-in location for external heating pump
Use the relevant mounted ProE plug to perform the elec-
trical connection.
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.
To assign the "external heating pump" function to the
grey plug (2) (additional relay) the value "2" must be
specified at diagnosis point "d.26" in the 2
level, see Chapter 9.1.2.
Installation and maintenance instructions ecoTEC plus 0020214490_00
X18
X13
X11
nd
diagnosis
2