Installation 5
0020261188_00 ecoTEC plus Installation and maintenance instructions
11
Reference
number for
the basic
diagram
Control
system
Number
of cir-
cuits
Carrying out the
wiring
0020253233
Basic control
1
See appendix.
0020253235
VRC 700
system
control
1
Observe the instruc-
tions for the system
control.
0020253236
eRELAX
connected
control
1
Observe the instruc-
tions for the system
control.
Note
The example of a basic installation diagram that
is shown in the appendix does not replace any
correct and expert system planning. (
→
Page 49)
The settings for the internal pump are made at the factory.
▶
Ensure that there is sufficient dimensioning for the
connections and the domestic hot water cylinder.
(
→
Page 13)
▶
Connect the external prioritising diverter valve to the plug
X13
on the main PCB.
▶
In order to control the cylinder's post-heating, connect
a
VR 10
temperature sensor or a thermostat to the plug
that is connected to the main PCB.
Wiring diagram (
→
Page 47)
To start up the prioritising diverter valve, it is not necessary
to set a diagnostics code. It is directly actuated by the pro-
duct's main PCB.
5.1.2
Basic system diagram type 2: Decoupled
heating circuit plus one directly connected
domestic hot water cylinder
1
2
3
4
5
6
1
Wall-hung boiler with
internal pump
2
Prioritising diverter
valve
3
Low loss header or
plate heat exchanger
4
External pump for the
decoupled heating
circuit
5
Heating circuit
6
Domestic hot water
cylinder
▶
In order to use this basic diagram type, ensure that the
minimum flow volumes are guaranteed for the operation.
(
→
Page 53)
The product can control a decoupled heating circuit and a
directly connected domestic hot water cylinder.
Reference
number for
the basic
diagram
Control
system
Number
of cir-
cuits
Carrying out the
wiring
0020253238
VRC 700
system
control
1
Observe the instruc-
tions for the system
control.
0020253239
VRC 700
system
control
VR 70
multi-
functional
module
2
Observe the instruc-
tions for the system
control.
0020259027
VRC 700
system
control
VR 71
multi-
functional
module
>3
Observe the instruc-
tions for the system
control.
The settings for the internal pump are made at the factory.
▶
Ensure that there is sufficient dimensioning for the
connections and the domestic hot water cylinder.
(
→
Page 13)
▶
Downstream of the low loss header, select a heating
pump that is appropriate for the installation.
▶
Connect the external pump for the decoupled heating
circuit to the plug
X16
for the main PCB.
▶
Connect the external prioritising diverter valve to the plug
X13
on the main PCB.
▶
Connect the temperature sensor for the low loss header
to plug
X41
on the main PCB. Observe the instructions
for the low loss header.
▶
In order to control the cylinder's post-heating, connect
a
VR 10
temperature sensor or a thermostat to the plug
that is connected to the main PCB.
Wiring diagram (
→
Page 47)
▶
Set diagnostics code
D.026
to 2.
Overview of diagnostics codes (
→
Page 39)
