Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual page 21

Number for Control
the basic system
diagram
0020253235 VRC 700
system
control
0020253236 Connected
vSMART
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 66)
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 23)
▶
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 64)
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.
7.2.2 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 8)
The product can control a decoupled heating circuit and a
directly connected domestic hot water cylinder.
0020261389_03 ecoTEC plus Installation and maintenance instructions
Number Carrying out the
of cir- wiring
cuits
1 Contact customer
service.
1 Contact customer
service.
1
2 6
3 4 5
4 External pump for the
decoupled heating
circuit
5 Heating circuit
6 Domestic hot water
cylinder
Number for Control
the basic system
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 23)
▶
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 64)
▶
Set diagnostics code D.026 to 2.
Overview of diagnostics codes (Validity: VU 446/5-5 (H-
GB) OR VU 606/5-5 (H-GB)) (→ Page 55)
7.2.3 Basic system diagram type 3: Decoupled
heating circuit plus one decoupled domestic
hot water cylinder
1
2
3
1 Wall-hung boiler with
internal pump
2 Low loss header or
plate heat exchanger
Number Carrying out the
of cir- wiring
cuits
1 Inform Customer
Service.
2 Inform Customer
Service.
>3 Inform Customer
Service.
6
4 5
3 External pump for the
decoupled heating
circuit
21