C
Frost stat
D
3-way valve
Bypass circuits with Vitosolic 200
To improve the start-up characteristics of the system or for frost pro-
tection with an external heat exchanger, we recommend operation
with a bypass circuit.
Bypass circuit with collector temperature sensor and bypass
sensor
S1
R1
R
S9
R1 Solar circuit pump
R
Bypass pump (subject to scheme)
S1 Collector temperature sensor
S9 Bypass sensor
The Vitosolic 200 captures the collector temperature via the collector
temperature sensor. If the set temperature differential between the
collector temperature sensor and the cylinder temperature sensor is
exceeded, the bypass pump is switched on.
The solar circuit pump is started and the bypass pump is stopped if
the temperature differential between the bypass sensor and the cyl-
inder temperature sensor is exceeded by 2.5 K.
Note
The pump of the Solar-Divicon is used as a bypass pump and the
pump for the solar pump assembly is used as a solar circuit pump.
Bypass circuit with solar cell and collector temperature sensor
R1
R
S1
SZ
SZ Solar cell
R1 Solar circuit pump
R
Bypass pump (subject to scheme)
S1 Collector temperature sensor
The solar control unit records the radiation intensity via the solar cell.
The bypass pump is started if the set insolation threshold is excee-
ded. The bypass pump is switched off and the solar circuit pump is
switched on if the set temperature differential between the collector
temperature sensor and cylinder temperature sensor is exceeded.
The bypass pump will also be stopped if the insolation level falls
below the selected switching threshold (shutdown delay approx.
2.5 min).
Note
The pump of the Solar-Divicon is used as a bypass pump and the
pump for the solar pump assembly is used as a solar circuit pump.
Parallel relay with Vitosolic 200
With this function, a further relay will be switched (subject to the sys-
tem scheme) in addition to the relay that switches the circulation
pump of a solar consumer, e.g. to control a diverter valve.
Cylinder 2 (to 4) on with Vitosolic 200
In systems with several consumers.
With this function, consumers can be excluded from solar heating.
Any break or short circuit of the cylinder temperature sensor
is then
no longer
reported.
Cylinder heating with Vitosolic 200
This function heats a consumer within a certain range. This range is
determined by the sensor positions.
Cylinder priority control with Vitosolic 200
In systems with several consumers.
It is possible to determine the order for heating the consumers.
Utilisation of excess heat with Vitosolic 200
In systems with several consumers.
A consumer can be selected to be heated only once all other con-
sumers have reached their set value. The selected consumer will not
be heated in cyclical operation.
Cyclical heating
In systems with several consumers.
If the consumer cannot be heated with priority, the next consumer in
line will be heated for an adjustable cycle time. After this time has
expired, the solar control unit checks the rise of the collector temper-
ature during the adjustable cyclical pause. As soon as the start con-
ditions for the consumer with priority have been met, that consumer
will be heated again. Otherwise, the next-in-line consumers will con-
tinue to be heated.
Relay kick with solar control module
If the pumps and valves have been switched off for 24 hours, they
are started for approx. 10 s to prevent them seizing up.
Relay kick with Vitosolic 200
If the pumps and valves have been switched off for 24 h, they are
started for approx. 10 s to prevent them seizing up.
SD card with Vitosolic 200
SD card to be provided on site with a memory capacity ≤ 32 GB and
file system FAT16
Note
Never use SD-HD cards.
The SD card is inserted into the Vitosolic 200.
■ To record the operating values of the solar thermal system
■ Saving the values to the module in a text file. The text file can be
opened, e.g. using a spreadsheet program. The values can there-
fore also be displayed graphically.
Solar control units
(cont.)
VITOSOL
VIESMANN
35
5822 440 GB
6
Summary of Contents for VITOCELL 100-B
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