Vaillant ECOTEC PLUS VU 80 User Manual

Electrical installation
ecoTEC plus installation and maintenance instructions 0020134823_01 27
8
> In order to achieve pump operating mode 1 "Comfort"
(continuously running pump) for multi-circuit controllers,
set the diagnostics code D.018 Pump operating mode
from 3 = "Eco" (intermittent pump) to 1 = "Comfort"
(¬section12.1.2).
> If the system partition is installed, set the pump to Com-
fort (D.018) and set the pump output to at least 4 (85 %,
D.014). The same setting applies for installing units in
cascade.
i
Please note that the bridge at the ProE plug
must be removed when connecting a maximum
thermostat (contact thermostat) for underfloor
heating.
8.5 Connecting additional units
b
Caution.
Risk of damage caused by incorrect
installation.
Connecting wires that have been stripped
too far may cause short circuits and dam-
age the electronics if a strand accidentally
comes loose.
> Only strip the lines a maximum of 3 cm
to prevent short circuits.
> Lay the lines correctly.
> Use strain reliefs.
8.5.1 VR 40 - Connecting the "2 from 7" multi-
functional module
You can connect two additional components to the ecoTEC
plus using the Vaillant multi-functional module "2 from 7"
( Accessories).
You can switch the following components:
– Circulation pump
– External pump
– Cylinder charging pump
– Fume extractor hood/flue non-return flap
– External solenoid valve
– External fault signal
– Not active
– Remote control eBUS (not active)
– Anti-legionella pump (not active)
> Install the components in accordance with the respective
installation instructions.
> Select diagnostics code D.018 to actuate relay 1 on the
multi-functional module at installer level (¬section12.1).
> Select diagnostics code D.028 to actuate relay 2 on the
multi-functional module at installer level (¬section12.1).
For cascade operation according to the B23p configuration,
you must provide a motorised flue non-return flap for each
unit and this is actuated by the VR40 multi-functional
module.
The installation instructions for the VR 40 describe how the
flue non-return flap is activated.
> For smooth operation in cascade, use the diagnostics
code D.050 to raise the fan speed in partial load opera-
tion to 1500 rpm.

Vaillant ECOTEC PLUS VU 80 Specifications

General

Brand	Vaillant
Model	ECOTEC PLUS VU 80
Category	Boiler
Language	English