Functions; Allocation To Solar Control Units; Cylinder Temperature Limit; Collector Cooling Function With Vitosolic 100 And 200 - Viessmann VITOSOL 100-F SV Technical Manual

Solar control units

10.4 Functions

Allocation to solar control units

Function

Cylinder temperature limit

Collector cooling function
Return cooling function

Collector emergency stop

Minimum collector temperature limit

Interval function
Cooling function
Frost protection function
Thermostat function
Speed regulation with wave packet control/PWM output
control
Heat statement
Suppression of reheating by the boiler
10 – DHW cylinder
– Central heating backup
Additional function for DHW heating
External heat exchanger
Bypass function
Parallel relay
Cylinder 2 (to 4) ON
Cylinder heating
Cylinder priority control
Utilisation of excess heat
Cyclical heating
Fault notification via relay output
Relay kick
SD card
Cylinder temperature limit
The solar circuit pump will be switched OFF if the set cylinder temper-
ature is exceeded.

Collector cooling function with Vitosolic 100 and 200

The solar circuit pump will be switched OFF if the set cylinder temper-
ature is reached. The solar circuit pump will be switched on long
enough to enable this temperature to fall by 5 K if the collector tem-
perature rises to the selected maximum collector temperature. The
cylinder temperature can then rise further, but only up to 95 °C.

Reverse cooling function with Vitosolic 100 and 200

This function is only sensible if the collector cooling function has been
enabled. If the set cylinder temperature is reached, the solar circuit
pump will be started to prevent the collector from overheating. In the
evening, the pump will run for as long as required to cool the DHW
cylinder down to the set cylinder temperature via the collector and the
pipework.
Collector emergency stop
In order to protect the system components, the solar circuit pump is
switched off if the adjustable collector limit temperature is exceeded.
Minimum collector temperature limit
The collector array will be blocked if the minimum collector tempera-
ture is not achieved.
VIESMANN
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Solar control module Vitosolic 100
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Information regarding the collector cooling and reverse cooling
functions
Ensure the intrinsic safety of the solar thermal system, even if the col-
lector temperature continues to rise after the system has reached all
limit temperatures, by accurately sizing the diaphragm expansion ves-
sel. Where stagnation occurs or for collector temperatures that rise
further, the solar circuit pump will be blocked or stopped (emergency
collector shutdown) to avoid thermal overloading of the connected
components.
Vitosolic 200
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VITOSOL