17
Installation and maintenance instructions ecoTEC 0020029173_01
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 primary pump. It is not necessary to do
settings at any diagnosis point.
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 charging mode
h
Note!
Also observe Chap. 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.
For faultless operation, both operating modes must be
carefully planned for the system. 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:
Hot water priority and heating circuit via low loss
header
1
2
3
4
5
6
Fig. 5.7 Hot water priority 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 primary pump
6 Cylinder
A 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. VRC 630). The available pump head from the boiler
is sufficient to pump water around the shunt 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.
9
8
5
4
3
N
L
X6
X11
X18
X13
X14
1
2
Fig. 5.8 Electrical connection for cylinder primary pump and
external heating pump
Legend:
1 Plug-in location for cylinder primary pump
2 Plug-in location for external heating pump
Use the relevant mounted ProE plug to perform the
electrical connection.
The pink plug-in location X6 (
1
) on the PCB is reserved
for the cylinder primary 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
nd
diagnosis
level, see Chap. 9.1.2.
Installation 5
