10
Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
i
The collection canister for solar fluid collects
escaping solar fluid. The solar fluid must not
reach the drainage system.
i
For the supply and return lines in the solar cir-
cuit, use insulated stainless steel pipes, e.g. the
Vaillant Solar flexible pipe that is included in the
scope of delivery of a Vaillant Solar set. Alterna-
tively, you can also use copper pipes with press
fittings and suitable insulation. Soft solder con-
nections are not suitable for solar piping.
i
If a cylinder is fitted very high up in the building,
negative pressure may form in the cylinder.
Under such circumstances, the competent per-
son must decide whether an anti-vacuum valve
is required in order to prevent damage to the
cylinder. If, as a result of draining or thermal
contraction of the drinking water, the negative
pressure in the cylinder is too high, an anti-vac-
uum valve ensures pressure compensation as a
result of air flowing into the cylinder.
The collector (
6
) converts solar energy into heat and
transfers the heat energy to a frost-protected solar fluid.
Using the pipe system, the solar pump of the solar pump
unit (
7
) conveys the heat from the collector to the biva-
lent cylinder (
2
). The solar pump unit is controlled by
the solar controller.
The solar controller switches the solar pump on and off
as soon as the temperature difference between the col-
lector and cylinder exceeds or falls below the preset
value. If the solar energy is not sufficient for require-
ments, the controller activates the gas-fired wall-hung
boiler (
1
) to reheat the top third of the cylinder to the
set hot water temperature value. The water in the cylin-
der can also be reheated using the electric immersion
heater installed at the factory.
A solar expansion vessel compensates for pressure
fluctuations in the solar circuit.
A solar protection vessel protects the expansion vessel
from excessive temperatures in the solar circuit. We rec-
ommend installing a protection vessel.
All Vaillant solar sets contain a combined solar protec-
tion and solar expansion vessel (
8
).
3.2 Electrical
wiring
If you use an eBUS-compatible Vaillant gas-fired wall-
hung boiler, you can use a Vaillant Control Centre for the
wiring.
If you are using a non-eBUS-compatible Vaillant gas-
fired wall-hung boiler or a third-party boiler, you can
use a standard cabling box.
Section 6.8 of these instructions describes the electrical
wiring of the system in detail.
3.3
Hot water temperature regulation
You can control the hot water temperature in the top
third of the cylinder using an auroMATIC VRS 560/2 or a
calorMATIC VRC 470 with VR 68/2 and VR 61/2 or with a
separate hot water controller.
a
Danger!
Risk of burns and scalds!
Water at a temperature of more than 60 ºC
could be delivered to the hot water draw-off
points.
>
Install a hot water thermostat mixer in
the hot water pipe to provide effective
scald protection.
>
Set the hot water thermostat mixer to
less than 60 ºC and check the tempera-
ture at
a hot water draw-off point.
3.4 Heating
control
If you are using an eBUS-compatible Vaillant gas-fired
wall-hung boiler, you can control the heating using a
programmable Vaillant VRT room thermostat or a VRC
weather compensator.
If you are using a non-eBUS-compatible Vaillant gas-
fired wall-hung boiler or a third-party boiler, you can use
a Vaillant VRT 30 room thermostat or one of the room
thermostats commonly available on the market.
3 System description
