Vaillant ecoTEC plus VC 406/5-5 Installation And Maintenance Instructions Manual page 12

Reference Control
number for system
the basic
diagram
0020253233 Basic control
0020253235 VRC 700
system
control
0020253236 eRELAX
connected
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 Wall-hung boiler with
internal pump
2 Prioritising diverter
valve
3 Low loss header or
plate heat exchanger
▶
In order to use this basic diagram type, ensure that the
minimum flow volumes are guaranteed for the operation.
(→ Page 53)
0020261188_00 ecoTEC plus Installation and maintenance instructions
Number Carrying out the
of cir- wiring
cuits
1 See appendix.
1 Observe the instruc-
tions for the system
control.
1 Observe the instruc-
tions for the system
control.
1
2 6
3 4 5
4 External pump for the
decoupled heating
circuit
5 Heating circuit
6 Domestic hot water
cylinder
The product can control a decoupled heating circuit and a
directly connected domestic hot water cylinder.
Reference Control
number for system
the basic
diagram
0020253238 VRC 700
system
control
0020253239 VRC 700
system
control
VR 70 multi-
functional
module
0020259027 VRC 700
system
control
VR 71 multi-
functional
module
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)
Installation 5
Number Carrying out the
of cir- wiring
cuits
1 Observe the instruc-
tions for the system
control.
2 Observe the instruc-
tions for the system
control.
>3 Observe the instruc-
tions for the system
control.
11