Vaillant Solar System and auroSTOR unvented solar..., Руководство по запуску, обслуживанию и устранению неисправностей

Страница: 17 / 69

Manual - Solar hot water systems 0020009607_02 18
4.7 auroSTOR solar cylinder
The auroSTOR solar cylinder is described in detail in
Section 5.1, Installation of the solar cylinder, of this
manual.
4.8 Solar control
1
230 V~
3
A
C
D
B
4
2
5
Sp 1
Sp 2
Solar gain
6
Kol 1
Fig. 4.13 Temperature difference control
Key
1 Solar control
2 Boiler
3 Solar
cylinder
4 Thermal cut out of the solar pump
5 Solar pump
6 Solar pump unit
Kol 1 Collector temperature sensor
Sp 1 Upper stored water temperature sensor
(reheating circuit/standby part)
Sp 2 Lower stored water temperature sensor (solar circuit)
A Boiler
flow
B Boiler return
C Solar flow
D Solar return
Type of solar control
The Vaillant solar system enables various system
configurations and control concepts.
Control of the hot water temperature
The hot water temperature in the top half of the cylinder
can be controlled by the Vaillant auroMATIC VRS 560
solar control or by using a separate hot water
programmer (refer to Section 5.8, Electrical installation).
Wiring
The Vaillant Control Center VR 61 or VR 65 can be used
to wire up the system if an eBUS-capable Vaillant boiler
is used.
A standard wiring box can be used for all other boilers.
Solar pump control
Temperature differences, not absolute temperature
values, are important for the operation of solar systems.
That is why solar systems are controlled by what is
referred to as temperature difference controllers.
Temperature sensors measure the difference between
the collector and solar cylinder.
The solar pump is switched on if the difference in
temperature (Kol 1 - Sp 2) is greater than 7 K. The solar
pump of the solar system is switched off if the difference
in temperature (Kol 1 - Sp 2) is lower than 3 K.
Furthermore the solar control constantly measures the
cylinder temperature. Reheating is switched on if the
value (Sp 1) falls below the set target value.
You can set the difference in temperature on the
controller between 2 and 15 K. The default setting of 7 K
is sufficient for most solar systems.
Do not set temperature differences too low. This would
result in a number of unnecessary and uneconomic
switch-on and switch-off procedures.
auroMATIC 560 controller
Fig. 4.14 auroMATIC 560
The auroMATIC 560 solar control is a differential
temperature-controlled control set for solar-supported
hot water supply with a demand driven reheating
function for Vaillant boilers.
The control set is a fully-equipped system for solar
systems with a collector array and a solar cylinder.
It is possible to determine the solar gain by means of an
additional gain sensor (available as an accessory).
4 Description of the components